ADC/DAC
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MCP3424-E/ST - 18-Bit Quad-Channel Delta-Sigma ADC | Microchip Technology
Microchip Technology MCP3424-E/ST is an 18-bit, four-channel delta-sigma analog-to-digital converter with differential inputs, an integrated precision 2.048 V reference, and a two-wire I2C-compatible serial interface. The device is supplied in a 14-TSSOP package and operates from a single supply voltage ranging from 2.7 V to 5.5 V. Its low-noise, high-accuracy architecture is intended for measurement systems that require more than 16-bit resolution but can tolerate a conversion rate of approximately 3.75 samples per second. A delta-sigma ADC is a sigma-delta analog-to-digital converter that uses oversampling, noise shaping, and digital filtering to convert a differential analog input into a high-resolution digital code. In the signal-chain hierarchy, the MCP3424-E/ST is an ADC, specifically a low-frequency precision delta-sigma ADC within the broader data-converter and semiconductor categories. Its differential input architecture helps reject common-mode noise when paired with suitable sensor and instrumentation amplifiers. The MCP3424 family provides up to 18-bit resolution, four input channels, a low-noise architecture, and an onboard 2.048 V precision reference that enables a differential input range of ±2.048 V according to the manufacturer product information. The I2C-compatible interface allows the converter to connect efficiently to embedded controllers while consuming relatively few external pins. The 14-TSSOP package also makes the device suitable for compact instrumentation equipment. Typical uses include pressure and temperature acquisition, industrial process monitoring, laboratory measurement, portable instrumentation, and sensor interfaces where low-frequency measurements are more important than high conversion speed. The differential inputs and integrated reference help simplify analog front-end design while preserving measurement resolution. The 2.7 V to 5.5 V operating range supports both 3.3 V and 5 V systems. When designing around the MCP3424-E/ST, confirm the analog input range, common-mode limits, reference configuration, digital interface voltage, and conversion timing against the manufacturer datasheet. Place input filtering and decoupling close to the device, and account for the 3.75 SPS conversion rate when defining sample timing. This page combines verified distributor information, manufacturer details, package information, practical application guidance, and clearly qualified replacement options.
MCP3426A0T-E/SN - 16-Bit Delta-Sigma ADC, Dual Ch, 15SPS | Microchip
The Microchip Technology MCP3426A0T-E/SN is a 16-bit, dual-channel, low-noise delta-sigma analog-to-digital converter with differential inputs, an on-board 2.048 V precision reference, and an I2C (two-wire) interface, supplied in an 8-pin SOIC package. According to the MCP3426/7/8 datasheet (Microchip document 22226A), the device provides a maximum output sample rate of 15 SPS at 16-bit resolution, an input range of ±2.048 V differentially, and operates from a single 2.7 V to 5.5 V supply. The 'A0' suffix denotes the fixed I2C address option and the 'T' indicates Tape and Reel packaging. A delta-sigma ADC (also written ΔΣ or sigma-delta ADC) is a type of oversampling converter that uses a modulator and digital filtering to achieve high resolution and excellent noise rejection, especially at low bandwidths. Within the broader signal-chain hierarchy, the MCP3426 belongs to the data-acquisition IC category -> analog-to-digital converter -> precision delta-sigma ADC -> low-power sensor ADC. Its on-chip reference and PGA eliminate most external components, simplifying designs that previously required a standalone ADC plus an external voltage reference. Key features include a programmable gain amplifier (PGA) with gains of 1, 2, 4, or 8, an internal 2.048 V reference with ±0.05% typical initial accuracy, 16-bit noise-free resolution, an I2C interface with user-configurable addresses, and an operating current of approximately 145 µA at 3 V during continuous conversion. The on-chip calibration register supports offset and gain self-calibration, which is useful for ratiometric measurements and sensor drift compensation. The architecture uses a second-order charge-balancing modulator and an SINC1 digital filter, which trades off settling time against noise. At the lowest data rate of 15 SPS the device achieves true 16-bit noise-free performance, while at the highest 240 SPS rate it switches to 12-bit effective resolution, making it well suited to multi-rate acquisition strategies. Typical applications include direct digitization of thermocouples, RTDs, bridge pressure sensors, strain gauges, and battery-cell voltage monitors. The differential ±2.048 V input range accommodates most low-voltage analog sensors without additional signal conditioning. When designing with the MCP3426, the I2C pull-up resistors must be sized correctly for the selected VDD and bus speed, and an external 0.1 µF decoupling capacitor placed close to the VDD pin is mandatory. Designers should also remember that the same address option 'A0' cannot co-exist on a single I2C bus with another A0 device; the A1, A2, or A3 address options must be selected for multi-channel systems. This page synthesizes distributor pricing, drop-in alternatives drawn from the same MCP3426 family, and practical design notes that go beyond the manufacturer datasheet's typical-application section.
MCP3427-E/MF - 16-Bit Dual-Channel Sigma-Delta ADC | Microchip
Microchip Technology MCP3427-E/MF is a 16-bit, two-channel, delta-sigma analog-to-digital converter with differential inputs, an onboard 2.048 V precision reference, programmable gain, and an I2C interface, housed in a 10-pin DFN package. The device is designed for low-noise, high-accuracy measurement systems where a sensor output must be converted with limited board space and low system complexity. The MCP3427-E/MF supports input measurement from small differential signals through an internal programmable-gain amplifier. Its differential input architecture helps reject common-mode noise when the measured source is referenced to a local ground or paired sensor output. The two input channels can be configured for single-ended or differential operation, allowing the converter to serve multiple analog front-end arrangements without changing the device package. Key features include up to 16-bit resolution, a 2.048 V internal reference, self-calibration of internal offset and gain for each conversion, and a serial I2C interface suitable for embedded measurement systems. The manufacturer describes the converter as a low-noise, high-accuracy delta-sigma ADC for precision data acquisition. The MCP3427-E/MF is supplied in a compact 10-VFDFN exposed-pad package, making it appropriate for space-constrained industrial, instrumentation, and sensor-interface designs. Delta-sigma conversion is especially useful when high resolution and noise rejection are more important than instantaneous conversion rate. The MCP3427 family is intended for measurements that can be filtered digitally after acquisition, such as temperature, pressure, load-cell, bridge, and slow process-control signals. The internal reference helps establish a stable conversion baseline, while the I2C interface allows a microcontroller or embedded controller to retrieve measurements without using a parallel data bus. The MCP3427-E/MF is not a high-speed waveform ADC. Its conversion rate and digital filter behavior should be considered when the application requires rapid sampling, low-latency control, or wide-band signal capture. For those requirements, a higher-bandwidth successive-approximation or pipeline converter would generally be a better architectural fit. For slow precision measurements, however, the MCP3427-E/MF provides a compact combination of resolution, differential inputs, programmable gain, and serial connectivity. Designers should pay attention to input common-mode voltage, analog noise filtering, reference stability, I2C address configuration, and decoupling around the exposed pad. The input network should limit high-frequency interference before it reaches the converter, while the digital interface should use suitable pull-up resistors and signal-integrity practices. This product page synthesizes the verified manufacturer and distributor information, package details, purchasing links, and engineering guidance for the MCP3427-E/MF.
MCP3427-E/UN - 16-Bit Dual-Channel Delta-Sigma ADC | Microchip
The Microchip Technology MCP3427-E/UN is a 16-bit dual-channel delta-sigma analog-to-digital converter with differential inputs, a 15 samples-per-second conversion rate, and a 10-MSOP package. It operates from a 3.3 V or 5 V supply and incorporates an on-board precision 2.048 V reference, providing a differential input range of ±2.048 V. The device communicates through an I2C interface for compact, low-noise measurement systems. A delta-sigma ADC is a category of analog-to-digital converter that uses continuous-time oversampling and digital filtering to convert analog input voltages into high-resolution digital codes. Its hierarchy extends from an ADC to a data-acquisition component and ultimately to a signal-chain semiconductor. Compared with flash converters, this architecture is especially useful when low noise, high effective resolution, and integrated differential input handling matter more than very high conversion speed. The MCP3427-E/UN combines two measurement channels with 16-bit resolution in one compact device. Its differential inputs help reject common-mode noise when the sensor or bridge output is centered around a biased reference. The integrated 2.048 V reference simplifies measurement designs that do not require an external precision reference, while the 15 sps rate suits slowly changing industrial, instrumentation, and sensor signals rather than high-bandwidth waveform acquisition. Each channel is processed by the converter’s delta-sigma architecture and exposed through the I2C interface. This makes the MCP3427-E/UN appropriate for systems that need accurate readings rather than rapid sampling. The 10-MSOP package also supports compact PCB layouts, although engineers must follow the manufacturer's layout guidance to preserve the low-noise performance of the analog inputs and reference circuitry. Typical uses include bridge-based pressure and load measurements, industrial process monitoring, portable instrumentation, and low-frequency sensor acquisition. Differential sensing is particularly valuable when a transducer produces a small signal riding on a larger common-mode voltage. The 3.3 V or 5 V operation also allows integration with both low-voltage embedded systems and conventional industrial control platforms. When designing around the MCP3427-E/UN, verify the selected conversion rate, digital filter behavior, input range, and reference configuration against the manufacturer datasheet. Input filtering, grounding, and I2C pull-up placement can materially affect a sensitive measurement, so the analog and digital return currents should be routed to avoid shared high-impedance paths. This product record combines the verified Microchip product information, distributor availability, package details, and same-family drop-in options. It also adds application guidance, selection criteria, and design notes intended to make the MCP3427-E/UN easier to evaluate than a distributor listing alone.
MCP3428-E/SL - 16-Bit 4-Channel ADC | Microchip
Microchip Technology MCP3428-E/SL is a four-channel, low-noise, high-accuracy delta-sigma analog-to-digital converter with differential inputs, up to 16-bit resolution, a 2.048 V precision internal reference, and a 14-pin SOIC package. The supported conversion rate reaches 240 samples per second, while its single supply operating range is 2.7 V to 5.5 V. The device uses a two-wire I2C-compatible serial interface for compact measurement systems. A delta-sigma ADC is a type of analog-to-digital converter that uses continuous-time oversampling and digital filtering to convert differential input voltages into high-resolution digital codes. Within the broader semiconductor hierarchy, the MCP3428 belongs to the ADC/DAC class and provides precision measurement functions for instrumentation, industrial controls, and low-frequency sensor acquisition. The MCP3428-E/SL supports four differential channels, resolution up to 16 bits, and a precision 2.048 V on-board reference. Differential input range extends to plus or minus 2.048 V when the internal reference is used. Its 240 SPS maximum conversion rate is suited to slow-changing analog quantities rather than high-bandwidth waveform acquisition, while the low-noise architecture helps preserve accuracy in bridge, potentiometer, temperature, and pressure measurements. Technically, the ADC combines delta-sigma conversion with an I2C-compatible control interface and onboard reference. Differential inputs reject common-mode noise when paired appropriately, and the internal reference reduces external-reference count in moderate-accuracy designs. The 2.7 V to 5.5 V supply range supports both 3.3 V and 5 V systems, although the selected interface voltage and available I2C bus limits must be checked during integration. Typical uses include industrial pressure and temperature acquisition, low-rate strain and bridge conditioning, potentiometer position sensing, battery-cell monitoring, laboratory measurement, and environmental monitoring. For high-speed motor control, audio sampling, or wideband vibration analysis, a higher-rate SAR or sigma-delta converter would generally be more appropriate. Designers should verify the input common-mode range and the datasheet configuration sequence before applying external signals. Place input and reference decoupling capacitors close to their pins, route analog inputs away from switching nodes, and confirm that I2C pull-up resistors satisfy the bus capacitance and rise-time requirements at the selected clock rate. This page combines verified manufacturer and distributor information, structured specification gaps, a package-aware comparison, and practical integration guidance. It also distinguishes verified ordering variants from genuine pin-compatible replacements so engineers can assess interchangeability without assuming that a similar converter is automatically a drop-in substitute.
MCP3428-E/ST - 16-Bit 4-Channel Sigma-Delta ADC | Microchip
The Microchip Technology MCP3428-E/ST is a four-channel, 16-bit delta-sigma analog-to-digital converter with differential inputs, an I2C interface, and a 14-TSSOP package. It operates from 3.3 V or 5 V, supports conversion rates up to 15 samples per second, and incorporates a precision 2.048 V internal reference. Its differential input range of ±2.048 V is useful for low-level sensor signals, while the four-channel architecture reduces the number of separate converters required in multi-sensor measurement systems. An analog-to-digital converter, or ADC, is an interface IC that converts continuous analog voltage into a numerical value suitable for processing by a microcontroller or embedded control system. The MCP3428 belongs to the delta-sigma ADC family within the broader analog and mixed-signal semiconductor hierarchy. Delta-sigma conversion is especially useful when high resolution, low noise, and relatively slow measurement are more important than very high conversion speed. The MCP3428 provides up to 16-bit resolution, four differential input channels, a 2.048 V precision reference, and a maximum 15 sps conversion rate. Its I2C interface allows a host controller to configure conversion settings and retrieve results, while the on-board reference reduces the external precision-component count. These characteristics make the device useful for temperature, pressure, strain, current, and other slowly changing industrial measurements. Its four differential inputs can reject common-mode noise when the source and return paths are routed carefully. The architecture is particularly valuable in sensors whose outputs are small relative to system supply voltage. The 14-TSSOP package also supports compact PCB layouts, although the exposed signal and reference connections require clean grounding and stable analog supply arrangements. Typical uses include process-control instrumentation, environmental monitoring, industrial sensor acquisition, laboratory measurement, and low-rate energy metering. MCP3428T-E/ST and other MCP342x family members may be considered when pin compatibility, resolution, or temperature-range requirements differ, but every substitute must be checked against the exact pinout, reference behavior, interface timing, and acquisition-cycle requirements. For implementation, use short analog traces, a quiet reference return, and decoupling close to VDD and VSS. Confirm the source impedance and settling time because the 15 sps maximum rate leaves limited time for the selected conversion cycle. Digital interface traces should be kept away from sensitive input and reference nodes to prevent I2C activity from coupling into measured voltages. This page consolidates the verified manufacturer and distributor information, separates known variants from true drop-in options, and adds engineering guidance on acquisition timing, grounding, decoupling, and replacement decisions. Those practical details help distinguish a nominal specification match from a design that can be qualified with confidence.
MCP3461-E/ST - 16-Bit 153.6 kSPS ADC | Microchip
The Microchip Technology MCP3461-E/ST is a 16-bit delta-sigma analog-to-digital converter with two single-ended or one differential input, a programmable data rate up to 153.6 kSPS, and a 20-pin TSSOP package. It operates across the verified temperature range of -40°C to +125°C and is supported as an active Microchip product. A delta-sigma ADC is an analog-to-digital converter category that uses oversampling and digital filtering to provide high-resolution conversion suitable for precision measurement. Within the signal-chain hierarchy, the MCP3461-E/ST belongs to the ADC and data-acquisition converter family, combining an analog input stage, sigma-delta modulator, digital filter, and serial interface in one low-noise device. Integrated functions help reduce the number of external components required in a measurement system. The MCP3461/2/4R family includes an internal voltage reference, internal oscillator, temperature sensor, and burnout-sensor detection. The MCP3461-E/ST also offers programmable output data rates up to 153.6 kSPS, making it suitable for sensors, process-control measurements, and industrial data-acquisition systems that prioritize resolution over very high conversion latency. The converter uses a delta-sigma architecture to achieve 16-bit nominal resolution while rejecting out-of-band noise through its digital decimation filter. The MCP3461R version is identified by Microchip as a preferred, pin-compatible option for new designs because it includes an onboard voltage reference that is not included in the MCP3461. Engineers should therefore verify the selected suffix and external reference configuration before making a direct substitution. Typical uses include bridge and pressure sensor interfaces, temperature measurement, industrial process monitoring, laboratory instrumentation, and embedded data-acquisition systems. Its integrated reference, oscillator, temperature sensor, and burnout detection are especially useful where component count, calibration overhead, and predictable operation matter. The principal design consideration is matching the input, reference, and digital interface requirements to the exact MCP3461 variant. MCP3461-E/ST and MCP3461R-E/ST share the 20-pin TSSOP footprint, but the R version adds an internal voltage reference; firmware, reference selection, and board-level requirements must be reviewed before interchange. Filtering characteristics, data rate, and digital timing should also be evaluated for the target measurement bandwidth. This page consolidates verified manufacturer and distributor information, package details, lifecycle status, sourcing data, and practical selection guidance. It also distinguishes true same-footprint alternatives from broader functional equivalents so engineers can identify which substitutions require additional design review.
MCP3462-E/ST - 16-Bit Dual 153.6kSPS ADC | Microchip
The Microchip Technology MCP3462-E/ST is a low-noise, 16-bit delta-sigma analog-to-digital converter with two differential or four single-ended input channels, a programmable conversion rate up to 153.6 kSPS, and a 20-pin TSSOP package. The converter operates from a 2.7 V to 3.6 V analog supply and a 1.8 V to 3.7 V digital supply. A delta-sigma ADC is a signal-processing category of analog-to-digital converter that continuously oversamples and digitally filters its input. Unlike a flash or successive-approximation ADC, the MCP3462 trades conversion latency for high resolution, low noise, and integrated signal conditioning. It belongs to the broader ADC > data converter > mixed-signal semiconductor hierarchy and is intended for precision measurement rather than high-speed waveform capture. Key features include 16-bit resolution, four single-ended or two differential inputs, and a maximum programmable data rate of 153.6 kSPS. Integrated resources include an internal oscillator, programmable gain amplifier, temperature sensor, and digital interface functions described by the manufacturer. The MCP3462 uses an external voltage reference, while the pin-compatible MCP3462R adds an onboard reference and is identified by Microchip as the preferred option for new designs. The MCP3462 combines a delta-sigma conversion core with programmable input gain and flexible data acquisition modes. Its internal oscillator reduces the need for an external clock source, while the temperature sensor supports system-level monitoring. The dual differential-input architecture allows common-mode rejection of paired sensors, and the four single-ended channels permit multiplexing for multi-sensor systems. The 2.7 V minimum analog supply supports low-voltage industrial instrumentation, although the analog and digital operating ranges must remain within their respective limits. Typical uses include industrial process measurement, battery and power-system monitoring, environmental sensing, portable instrumentation, and low-frequency precision data acquisition. The integrated temperature sensor can assist with board-level thermal monitoring, while the programmable gain amplifier supports inputs that vary substantially in amplitude. Because the device is a delta-sigma ADC, software or digital filtering and a settling-time budget must be considered when measuring rapidly changing signals. The principal design consideration is reference quality. The MCP3462 requires an external reference, and reference noise, layout distance, and input filtering directly influence conversion results. Place the analog inputs, external reference, and associated bypass components close to the converter, keep digital interfaces away from sensitive analog inputs, and follow the manufacturer’s recommended decoupling and grounding arrangement. This page combines manufacturer positioning, distributor availability, verified package and channel information, pin-compatible same-family alternatives, and practical selection guidance. It also distinguishes the externally referenced MCP3462 from the onboard-reference MCP3462R so engineers can choose the appropriate variant without treating every TSSOP ADC as an interchangeable replacement.
MCP3464-E/ST - 16-Bit Quad-Channel Delta-Sigma ADC | Microchip
The Microchip Technology MCP3464-E/ST is a 16-bit quad-channel delta-sigma analog-to-digital converter (ADC) designed for 3 V supply operation, packaged in a 20-pin gull-wing TSSOP (ST) surface-mount package. A delta-sigma ADC is a type of analog-to-digital converter that uses a sigma-delta modulator and a digital decimation filter to convert an analog voltage into a high-resolution digital word. This architecture trades conversion speed for excellent noise performance and linearity, which makes it a favored member of the ADC family hierarchy: ADC -> delta-sigma ADC -> sigma-delta modulator -> high-resolution mixed-signal converter for low-bandwidth, high-precision measurement. Key features of this device include 16-bit resolution across four analog input channels, a differential-capable sigma-delta conversion core, a 3 V supply rail for low-voltage system compatibility, and an automotive temperature grade designation according to distributor listings. Because the converter operates as a delta-sigma type ADC, it suits slow-moving analog signals such as temperature, pressure, load-cell, and bridge-sensor outputs where integration averages out wideband noise. An important design note from Microchip is that the MCP3464R variant, which includes an onboard voltage reference, is the preferred pin-compatible option for new designs; the MCP3464 itself requires an external reference. Typical applications include industrial process-control instrumentation, medical monitoring equipment, automotive sensor acquisition, energy-metering subsystems, and precision data-acquisition modules where 16-bit resolution, low noise, and simple single-chip signal conditioning reduce the need for external analog front ends. When designing around the MCP3464-E/ST, verify the reference-voltage requirement against your system: an external low-noise reference and proper input filtering are mandatory because the converter has no internal voltage reference. Decouple the supply pin close to the device, keep analog and digital return currents separated, and confirm the full conversion timing against your host sampling rate before committing to a multiplexed channel schedule. This page consolidates distributor pricing, pin-compatible Microchip drop-in alternatives, and practical application and layout guidance that is not assembled from a single manufacturer datasheet, giving engineers a single decision-ready reference for this quad-channel 16-bit delta-sigma ADC.
MCP3551-E/MS - 22-Bit Low-Noise Delta-Sigma ADC | Microchip
The Microchip Technology MCP3551-E/MS is a 22-bit, single-channel delta-sigma analog-to-digital converter with a fully differential input, an internal oscillator, and a conversion rate of 13.75 samples per second, housed in an 8-pin MSOP package. The converter supports supply operation from 2.7 V and is designed for applications requiring high accuracy, low noise, and low-power signal acquisition. Its output noise is specified as low as 2.5 uVRMS, while total unadjusted error is reported as 10 ppm. A delta-sigma ADC is a voltage regulator and signal-processing technique in which a continuously operating internal modulator oversamples the input before digital filtering and decimation. The MCP3551 belongs to the ADC, data-converter, and analog-signal-processing semiconductor hierarchy. Its low output rate and high nominal resolution favor measurements that change slowly, making it particularly useful for industrial process-control loops, bridge sensors, and precision analog instrumentation rather than high-bandwidth waveform capture. The principal benefits of the MCP3551-E/MS include 22-bit resolution, a fully differential analog input, low output noise, a 10 ppm total unadjusted error, and an internal oscillator that avoids an external clock source. The single input supports one analog measurement channel, while the delta-sigma architecture filters high-frequency content through oversampling and digital decimation. Its 2.7 V minimum supply voltage also permits use in compact, low-power measurement systems. The MCP3551 family combines a sigma-delta conversion stage with an internal oscillator and digital signal processing. The verified comparison data identifies the MCP3551 as a low-power, single-channel converter and lists a 2.7 V operating supply. Because the device uses a fully differential input, the source circuit must present two input nodes with the required common-mode voltage and differential range. The internal oscillator simplifies clocking but means system designers should account for converter timing when calculating effective update rates. Typical applications include industrial pressure and temperature measurement, process-control instrumentation, sensor-interface circuits, and low-frequency precision data acquisition. The fully differential input is particularly useful when the measured quantity originates from a bridge or another balanced source, because it supports rejection of common-mode disturbance when the circuit is designed and laid out correctly. The 13.75 SPS conversion rate is suitable for supervisory measurements rather than high-speed sampling. The primary design consideration is the analog front end. Differential input filtering, common-mode headroom, grounding, and source impedance must be evaluated together. Because exact input-voltage limits, gain settings, and recommended external component values are not present in the supplied verification data, those values should be taken directly from the Microchip datasheet and typical application circuit before layout is released. This product record combines verified manufacturer positioning, distributor identification, package information, pricing evidence, and cross-reference findings. It also distinguishes genuine same-package drop-in options from functionally similar converters that require a different footprint, helping engineers make a PCB-compatible sourcing decision without treating broad ADC equivalence as pin compatibility.
MCP3551-E/SN - 22-Bit Low-Power Sigma-Delta ADC | Microchip
The Microchip Technology MCP3551-E/SN is a 22-bit, single-channel, low-power, sigma-delta analog-to-digital converter with fully differential analog inputs, an internal oscillator, and a serial interface for industrial and process-control measurements. The device operates from a 2.7 V to 5.5 V supply, provides output noise as low as 2.5 uVrms according to the supplied comparison data, and supports conversion rates described in distributor listings as low as 14 sps. It is packaged in an 8-pin SOIC, designated MCP3551-E/SN, and is specified for operation from -40 C to +125 C. A sigma-delta ADC is a voltage-regulator and signal-conversion category within the broader ADC and data-converter hierarchy. Its modulator and digital filter shape quantization noise away from the signal band, allowing high resolution and low noise without requiring a high-speed flash or successive-approximation converter. The MCP3551 family uses fully differential inputs, making it suitable for bridge sensors, sensor interfaces, and other measurement systems where common-mode noise and ground references must be controlled carefully. The MCP3551-E/SN is positioned for precision measurement rather than high-throughput sampling. Its 22-bit resolution, low-power operation, internal oscillator, and differential input architecture support compact industrial and process-control equipment. The listed 14 sps operating rate indicates that it is intended for slowly changing or low-bandwidth signals, such as temperature, pressure, load-cell, and chemical-sensor outputs, rather than waveform capture or fast closed-loop control. The device uses a serial interface and is identified in distributor listings as a one-channel ADC with SPI communication. The 8-pin SOIC package provides a small-footprint surface-mount option, while the -40 C to +125 C temperature range supports industrial equipment and extended-temperature environments. The automotive AEC-Q100 designation appears in the supplied Arrow listing, but the exact qualification scope and grade should be confirmed against the manufacturer documentation before automotive release. For new layouts, use the MCP3551-E/SN as the reference part and verify the differential input network, reference voltage, digital interface, and grounding strategy against the manufacturer datasheet. Because the supplied web data does not provide the complete pin-level definitions, input ranges, settling behavior, or calibration coefficients, those values require confirmation before final circuit sign-off. This product page consolidates the verified manufacturer and distributor information, price observations, package details, application guidance, and drop-in candidate analysis. It also clearly distinguishes verified facts from parameters that still require datasheet confirmation, helping engineers evaluate the MCP3551-E/SN without relying on unsupported assumptions.
MCP3553-E/MS - 22-Bit 60 SPS Sigma-Delta ADC | Microchip
The Microchip Technology MCP3553-E/MS is a low-power, single-channel 22-bit delta-sigma analog-to-digital converter with a 60 samples-per-second conversion rate, SPI interface, and 8-pin MSOP package. It is designed for precision measurement systems that require high resolution and relatively slow conversion rates, including industrial process monitoring, sensor instrumentation, laboratory measurement, and low-bandwidth data acquisition. According to the Microchip MCP3553 product page, the device is in production and is described as a 22-bit, 60 SPS, single-channel ADC. A delta-sigma ADC converts an analog input by using an internal modulator, digital filter, and decimator to oversample and average the input signal. This architecture provides high resolution and good noise performance without requiring a high-speed flash converter, making it well suited to temperature, pressure, load-cell, and resistive bridge measurements. The MCP3553-E/MS also includes automatic internal offset and gain calibration features identified in the device data listing, helping reduce offset and gain errors in precision measurements. The MCP3553-E/MS operates from a 2.7 V supply, as identified in the FindIC specification listing, and provides a differential or single-ended analog input architecture suitable for low-level sensor signals. Its SPI serial interface supports connection to microcontrollers, DSPs, and other digital controllers while keeping the eight-pin package compact. The 22-bit resolution provides a nominal 4.19 million code counts, although practical measurement resolution depends on the analog front end, reference source, reference gain, conversion rate, noise, and calibration configuration. Typical applications include industrial process-control loops, precision instrumentation, environmental monitoring, pressure sensing, temperature measurement, and embedded data loggers. Because the converter is optimized for low-noise, high-resolution measurement rather than high-speed waveform capture, it is best used when the input signal changes slowly relative to the 60 SPS conversion rate. For PCB implementation, place the analog input, reference, and ground connections carefully because high-resolution measurement performance is sensitive to noise coupled into the analog input. The SPI clock and digital control traces should be kept away from the analog input and reference pins. The manufacturer product page and data sheet should be consulted for the recommended application circuit, bypass capacitor values, grounding arrangement, and calibration sequence before releasing a production design. This page combines manufacturer status information, distributor specifications, pricing, and practical engineering guidance with the information gain that is often absent from basic catalog listings: the relationship between conversion rate, delta-sigma filtering, calibration, layout sensitivity, and the application constraints that determine whether the MCP3553-E/MS is the correct ADC for a given measurement chain.
MCP3561-E/ST - 24-Bit 153.6kSPS ADC | Microchip
The Microchip Technology MCP3561-E/ST is a 24-bit, single-channel delta-sigma analog-to-digital converter with a programmable data rate up to 153.6 kSPS, offered in a 20-pin TSSOP package. It supports two single-ended input channels or one differential input channel and operates from a 3 V supply. A delta-sigma ADC is a type of analog-to-digital converter that uses a sigma-delta modulator and digital decimation filtering to convert an analog input into a high-resolution digital result. The MCP3561 belongs to the ADC/DAC category within the broader semiconductor and signal-conversion hierarchy, making it suitable for precision measurement systems where moderate conversion speed and high resolution are more important than very high sample rates. The principal features established by the verified manufacturer and distributor data are 24-bit resolution, a maximum output rate of 153.6 kSPS, programmable conversion timing, single-ended or differential input capability, and operation from a 3 V supply. The single-ended architecture allows two inputs to be selected, while differential operation supports a one-channel arrangement for rejecting common-mode noise when the source can provide a complementary signal. The MCP3561 uses delta-sigma conversion to balance fine resolution with integrated digital filtering. Its maximum 153.6 kSPS rate makes it faster than many conventional low-resolution sigma-delta converters while retaining a 24-bit output format. However, the exact input bandwidth, effective noise performance, conversion-time table, common-mode range, and acquisition timing must be confirmed in the manufacturer datasheet before final analog-front-end and sampling-system design. Typical applications include precision process-control instrumentation, industrial sensor acquisition, portable measurement equipment, low-frequency data acquisition, and embedded measurement systems. The MCP3561R family is especially relevant because the manufacturer identifies MCP3561R as pin compatible and recommends it for new designs when its integrated voltage reference is acceptable. Designers should use the manufacturer's specified analog input network, reference arrangement, bypass-capacitor values, grounding method, and digital-interface timing. Because the MCP3561 does not include the onboard reference offered by MCP3561R, an external reference implementation must account for reference noise, drift, input impedance, and adequate decoupling. This page consolidates verified manufacturer positioning, distributor availability, package information, and conversion specifications with practical replacement guidance. It also distinguishes the confirmed pin-compatible MCP3561R from unverified alternatives so engineers can make an evidence-based decision without treating a similar ADC as a guaranteed drop-in replacement.
MCP3562-E/ST - 24-Bit Dual-Channel Delta-Sigma ADC | Microchip
The Microchip Technology MCP3562-E/ST is a 24-bit, 153.6 ksps delta-sigma analog-to-digital converter with two or four selectable inputs, housed in a 20-pin TSSOP package. The converter is designed for precision signal acquisition where a delta-sigma architecture, high nominal resolution and selectable channel configuration are important. According to the Microchip MCP3562 family documentation, the MCP3562R is a preferred pin-compatible option for new designs and adds an onboard voltage reference that is not included in the MCP3562. A delta-sigma ADC is a type of data-conversion IC that uses oversampling, a digital filter and a modulator to convert an analog input into a high-resolution digital result. In the electronic-component hierarchy, it belongs to the ADC/DAC category, then to analog-to-digital converters, then to data-acquisition ICs and finally to integrated circuits. This makes the MCP3562-E/ST appropriate when a design needs precision conversion rather than the very short conversion time associated with a SAR ADC. The verified product information identifies a 24-bit resolution, a maximum sample rate of 153.6 ksps, two or four inputs and a 20-pin TSSOP package. The Mouser listing further describes the MCP3562-E/ST as a dual-channel, 3 V delta-sigma ADC. These characteristics allow the converter to address industrial measurement, process-control, sensor-interface and low-bandwidth instrumentation applications where signal conditioning and reference design are important. The MCP3562 family data identifies the device as a low-noise, high-speed delta-sigma converter capable of 153.6 ksps operation. The MCP3562 variant supports selectable input arrangements, while the MCP3562R retains the same pin-compatible family concept but incorporates an onboard reference. That distinction is significant because the MCP3562-E/ST requires an appropriate external reference arrangement, whereas the MCP3562R simplifies reference implementation. Typical uses include analog sensor measurement, factory process monitoring, laboratory data acquisition and embedded measurement systems. In each case, the 24-bit nominal resolution can preserve fine numerical detail, while the 153.6 ksps maximum rate supports fast enough conversion for many low-frequency industrial signals. The TSSOP-20 package also supports compact board layouts, although thermal and layout quality remain important around any precision converter. Designers should evaluate the exact input configuration, external reference, analog front end and digital interface against the current Microchip datasheet before layout release. Because the MCP3562R is identified as the preferred pin-compatible option for new designs, engineers should evaluate that variant when a redesign or new board can use an integrated reference without changing the land pattern. This page consolidates verified manufacturer and distributor information, lifecycle guidance, package data, pricing and replacement considerations. It also distinguishes the MCP3562-E/ST from the preferred MCP3562R option and adds practical selection, application and procurement guidance without presenting unverified electrical values as definitive specifications.
MCP3564-E/ST - 24-Bit 153.6kSPS ADC | Microchip
Microchip Technology MCP3564-E/ST is a low-noise 24-bit delta-sigma analog-to-digital converter with eight single-ended or four differential inputs, a maximum data rate of 153.6 ksps, and a 20-lead TSSOP package. The converter supports 2/4/8-channel families and is intended for precision analog signal acquisition where a high-resolution digital output and flexible input configuration are required. The MCP3564 does not include the onboard voltage reference found in the preferred MCP3564R variant. A delta-sigma ADC is a type of analog-to-digital converter that uses oversampling, noise shaping, and digital filtering to convert continuous analog voltages into high-resolution digital codes. Within the data-converter hierarchy, it belongs to the ADC/DAC category and provides an alternative to successive-approximation and flash converters when low-noise integration and programmable output data rates are more important than very low conversion latency. The verified product information identifies a 24-bit conversion resolution, a maximum output rate of 153.6 ksps, and eight single-ended or four differential input channels. The low-noise architecture is useful when measuring sensor outputs, process-control signals, or low-amplitude analog quantities where the ADC must preserve signal detail while converting it into a digital representation. Its 20-lead TSSOP package supports conventional surface-mount PCB assembly. The MCP3564 is one member of the MCP3561/2/4 family, which provides a common platform for two-, four-, and eight-channel low-noise 24-bit delta-sigma converter applications. Programmable data-rate capability allows the interface timing to be matched to different measurement bandwidths. This can reduce unnecessary digital data transfer in systems where the source changes slowly, while faster rates remain available for dynamic measurements. Typical uses include industrial process monitoring, precision instrumentation, environmental sensing, factory data acquisition, and embedded measurement systems. Eight single-ended channels are useful for monitoring several sensors with a common ground reference, while four differential channels help reject common-mode noise when the source is balanced or when the analog front end can drive differential signals. Designers should account for the absence of an onboard reference in the MCP3564 and provide an appropriate external voltage reference. Input filtering, source settling, grounding, and PCB layout should preserve the low-noise performance of the converter. The exact electrical limits, reference requirements, interface details, and recommended external circuitry must be verified in the manufacturer datasheet before production design. This product record combines verified manufacturer and distributor information with a structured comparison against the pin-compatible MCP3564R-E/ST. It also highlights selection trade-offs, pricing context, and practical design considerations that help engineers distinguish the standard MCP3564 from the reference-equipped MCP3564R without relying on undocumented assumptions.
MCP3903-E/SS - 6-Channel 24-Bit Energy Meter AFE | Microchip
The Microchip Technology MCP3903-E/SS is a six-channel analog front end (AFE) for high-accuracy energy measurement, with six synchronous-sampling 16/24-bit delta-sigma ADCs, programmable gain amplifiers, an internal voltage reference, phase-delay compensation, and a 10 MHz SPI interface in a 28-pin SSOP package. It accepts a 4.5 V to 5.5 V analog supply and a 2.7 V to 3.6 V digital supply, making it suitable for both metrology and embedded power-monitoring systems. An energy-metering analog front end is an integrated signal-conditioning and conversion block placed between voltage and current sensors and a host processor. The MCP3903 belongs to the ADC, analog front end, and power-management measurement hierarchy. Its six synchronized channels support three-phase measurement, while its delta-sigma converters and internal reference provide the resolution required for accurate real-power and energy calculations. Key features include six synchronous-sampling converters with selectable 16-bit or 24-bit resolution, programmable gain amplifiers, a phase-delay compensation block, an internal voltage reference, and up to 91 dB SINAD. The device also provides a 10 MHz SPI-compatible serial interface for transferring measurement data to a metering microcontroller or energy-metering SoC. Technically, the MCP3903 combines two synchronous-sampling delta-sigma converter cores with three analog channel pairs. This arrangement allows multiple voltage and current inputs to be sampled under common timing conditions, helping preserve the phase relationship required for three-phase energy calculations. The manufacturer identifies the MCP3903 as suitable for three-phase energy measurement, power monitoring, and other systems requiring multiple high-accuracy ADCs. Typical uses include three-phase utility meters, industrial energy monitors, multi-channel power analyzers, building-energy submeters, and embedded systems that measure several voltage and current channels simultaneously. The SPI interface supports integration with Microchip-compatible metering controllers while the internal reference reduces the number of external precision components. A primary design consideration is preserving sensor-channel matching and analog layout quality. Each current and voltage input should use the sensor and filtering network recommended by the manufacturer, while power and ground routing must avoid introducing errors into low-level AFE measurements. Supply bypassing, reference stability, and PCB cleanliness are especially important when the 24-bit operating mode is used. This product page combines verified manufacturer and distributor information, package-specific details, pricing context, and engineering guidance to support component selection, PCB design, and procurement decisions beyond the basic catalog listing.
MCP3905A-E/SS - 16-Bit Energy Metering IC | Microchip
The Microchip Technology MCP3905A-E/SS is a 16-bit energy-metering analog-to-digital converter IC with two delta-sigma ADCs, programmable gain up to 16, and an integrated voltage reference, packaged in a 24-pin SSOP. It is designed for single-phase energy measurement and supports the IEC 62053 international energy-metering specification. Its measurement inputs and frequency outputs support current and voltage sensing, active-power calculation, and meter calibration. An energy-metering ADC is a specialized data-converter IC that converts analog voltage and current signals into digital measurements while providing the accuracy, linearity, and calibration functions required by an electricity meter. The MCP3905A belongs to the ADC/DAC and power-measurement IC hierarchy, combining precision signal acquisition, internal reference generation, and energy-specific outputs in one device. The MCP3905A incorporates two 16-bit delta-sigma ADCs with programmable gain up to 16, supporting small-shunt measurements across a wide range of input currents. Its integrated voltage reference has ultra-low temperature drift of 15 ppm/°C, helping preserve measurement stability as the meter operates over changing ambient conditions. The device also provides active-real-power pulse output and instantaneous-power-related frequency information according to the manufacturer product description. Typical applications include residential single-phase electricity meters, utility metering modules, energy-monitoring systems, load-control equipment, and industrial power instrumentation. The device is useful when the design needs accurate voltage and current acquisition without relying solely on a general-purpose microcontroller ADC. Designers should carefully review the manufacturer datasheet for input ranges, pin functions, electrical limits, calibration procedures, and application-circuit details. External signal conditioning, filtering, current-shunt selection, voltage-divider design, and PCB layout strongly influence achievable meter accuracy. Pricing and availability should be confirmed against authorized distributors for the current purchasing date.
MCP3909ISS - 16-Bit Energy Metering AFE | Microchip
The Microchip Technology MCP3909ISS is a 16-bit energy-metering analog front-end IC with SPI interface, active-power pulse output, and single-phase metering support. The verified product data identifies a 4.5 V to 5.5 V supply range, 2.3 mA supply current, 390 kOhm input impedance, and 0.1% measurement error. It is supplied in a 24-SSOP package, making it suitable for compact single-phase energy-metering designs. An energy-metering AFE is a signal-chain IC that measures voltage and current channels and converts their analog inputs into digital information for energy calculation. In the broader hierarchy, an energy-metering IC belongs to the AFE and power-measurement semiconductor category, where accurate current and voltage acquisition supports utility meters, load monitoring, industrial energy management, and building-energy systems. The MCP3909 is designed around the IEC 62053 international metering specification and also references legacy IEC 1036, IEC 61036, and IEC 687 requirements in the verified data. The MCP3909 combines simultaneous serial access to ADC channels with multiplier output data and a frequency output proportional to average active real power. These features allow a host processor to retrieve measurements while the hardware provides a convenient active-power pulse indication. The 16-bit ADC architecture is intended for metering applications where measurement resolution and energy accuracy are more important than low-cost general-purpose signal acquisition. Typical uses include single-phase utility meters, residential energy monitors, industrial submeters, appliance energy measurement, and embedded power-monitoring equipment. In these systems, the AFE accepts voltage and current information, performs analog-to-digital conversion, and supplies measurement data through its serial interface. The active-power output can provide a low-frequency measurement signal for meter calibration, energy accumulation, or system monitoring. The principal design considerations are input filtering, calibration, reference stability, signal integrity, and correct implementation of the current and voltage channels. Designers should follow the manufacturer datasheet for the exact pin functions, recommended external components, analog input limits, digital interface timing, and calibration procedure. The verified web data confirms the 24-SSOP package and tube packaging information, while some detailed electrical limits and pin-level details require datasheet confirmation. This page combines verified manufacturer and distributor information with application guidance and design considerations. It also identifies the MCP3909 as a single-phase 24-SSOP energy-metering IC with SPI connectivity, active-power pulse output, a 16-bit ADC, and support for IEC 62053-oriented metering designs.
MCP4641-104E/ST - 100kΩ Dual 7-Bit I2C Digital Potentiometer
The Microchip Technology MCP4641-104E/ST is a 100 kΩ dual-channel, non-volatile 7-bit digital potentiometer with 129 wiper steps, EEPROM, and an I2C-compatible interface in a 14-pin TSSOP package. It operates from 2.7 V to 5.5 V and provides two independent digitally controlled resistor networks for programmable gain, filtering, voltage division, or resistance adjustment. A digital potentiometer is an active resistor-network IC whose wiper position is controlled through a digital interface instead of a mechanical shaft. The MCP4641 belongs to the digital potentiometer hierarchy, which combines resistor networks, wiper switches, EEPROM-backed configuration, and serial control into a compact surface-mount component. Its I2C interface allows a microcontroller or other host controller to change resistance settings while the circuit remains in operation. The MCP4641-104E/ST provides 129 wiper positions, corresponding to 7-bit resolution and a 128-resistor network per channel. Its nominal end-to-end resistance is 100 kΩ with a resistance tolerance of ±20%, according to the verified manufacturer and distributor data. Non-volatile EEPROM storage preserves the last programmed wiper configuration, reducing repeated setup after power cycling when the host supports the device’s memory functions. The MCP464X family is designed around an EEPROM-backed architecture and supports potentiometer or rheostat use. The device can therefore be placed in signal paths where software-adjustable attenuation, current-limits, threshold, or gain correction is useful. Its 14-TSSOP package is suitable for compact embedded control boards, although the narrow package requires careful PCB layout and pin-level soldering. Typical applications include audio volume control, sensor signal conditioning, programmable amplifier gain, industrial control interfaces, and portable equipment where a microcontroller needs to trim analog parameters digitally. The I2C bus allows centralized control of both channels, while EEPROM retention simplifies deterministic power-up behavior. For robust design, verify the I2C address and bus pull-up requirements in the manufacturer datasheet, confirm the electrical limits for the selected terminal and wiper configuration, and route analog resistor-network terminals away from high-current switching nodes. This page consolidates verified distributor specifications, practical application guidance, and available replacement information for engineers evaluating the MCP4641-104E/ST.
MCP4728-E/UN - 12-Bit Quad DAC I2C EEPROM MSOP-10 | Microchip
The Microchip Technology MCP4728-E/UN is a quad-channel, 12-bit voltage-output Digital-to-Analog Converter (DAC) with non-volatile EEPROM memory, housed in a 10-pin MSOP package. It supports I2C-compatible serial interface and provides rail-to-rail analog output swing through its on-board precision output amplifier, operating from a single 2.7 V to 5.5 V supply. What is a quad voltage-output DAC? A DAC (Digital-to-Analog Converter) translates a digital code into an analog voltage or current. A voltage-output DAC integrates an output amplifier that buffers the internal reference node, allowing the analog output to drive real-world loads directly. A quad DAC combines four independent converters on a single die, simplifying multi-channel designs such as waveform synthesis, programmable sensor excitation, and multi-point trim. As a sub-category of data converters, the quad DAC sits in the broader signal-chain hierarchy: data converter -> DAC -> voltage-output DAC -> multi-channel DAC -> power management/analog signal chain IC. Key features include four 12-bit resolution channels, an integrated 2.048 V internal reference with optional VDD reference, rail-to-rail output swing, individual EEPROM storage per channel for input code and configuration bits, and selectable I2C address bits (up to 8 slave addresses). The settling time to 1/2 LSB is typically 6 microseconds, and the device draws only 40 nA typical standby current with shutdown support per channel. The MSOP-10 footprint allows compact PCB placement suitable for portable and space-constrained applications. The MCP4728-E/UN uses a resistor-string architecture with on-chip EEPROM, allowing the DAC input codes, gain, power-down, and I2C address bits to be programmed to non-volatile memory. The high rail-to-rail output swing combined with low power consumption makes it suitable for battery-powered portable instruments where each channel can output independent analog voltages without external op-amps. Typical applications include digital audio volume and tone control, motor control reference setpoints, programmable sensor calibration, multi-channel instrumentation, and configurable system biasing. Designers also use it in waveform generators for arbitrary-function-signal reconstruction and as a low-power replacement for mechanical potentiometers in user-interface trimming. When designing with the MCP4728-E/UN, ensure the supply decoupling capacitors (typically 0.1 microfarad ceramic) are placed as close as possible to VDD and GND. Use the I2C bus pull-up resistors appropriate to the selected clock rate, and verify the SDA/SCL rise times against the I2C specification for the chosen VDD voltage. This page synthesizes distributor pricing, drop-in alternative MPNs, and practical design notes that complement the Microchip datasheet (DS22187E) with real-world procurement and selection guidance for engineers.
MM74C948N - 8-Bit ADC w/ 16-Ch MUX | Texas Instruments | DIP-40
The Texas Instruments MM74C948N is an 8-bit CMOS analog-to-digital converter with a built-in 16-channel analog input multiplexer, housed in a 40-pin PDIP (N) through-hole package. Operating from a single 5 V supply over an industrial -40C to +85C temperature range, it features a successive-approximation register (SAR) architecture with a maximum conversion time of 116 us, making it suitable for microprocessor-controlled data-acquisition systems. A SAR ADC (Successive-Approximation Register Analog-to-Digital Converter) is a type of data converter that converts an analog input voltage into a digital code by iteratively comparing the input against an internal DAC. The 8-bit SAR architecture is widely used in embedded and industrial designs because it offers deterministic conversion latency, low power consumption, and ease of interface to microprocessors - in the component taxonomy it sits between sigma-delta ADCs (higher resolution, slower) and flash ADCs (faster, lower resolution), with the MM74C948N targeting moderate-speed multi-channel acquisition. The MM74C948N combines an 8-bit ADC core with an analog input multiplexer (up to 16 single-ended analog inputs), eliminating the need for external analog switches in multi-sensor systems. It supports microprocessor-compatible interface logic and operates from a single 5 V supply, simplifying integration with 5 V CMOS logic families. Industrial-grade temperature tolerance (-40C to +85C) supports factory automation and process-control environments. Designed in CMOS technology, the MM74C948N achieves low power consumption compatible with battery-powered and portable instrumentation. The integrated 16-channel input mux eliminates the need for an external analog switch array, reducing BOM cost and PCB area while preserving the 8-bit conversion accuracy of the ADC core. Successive-approximation conversion delivers deterministic conversion timing, simplifying real-time software design. Typical applications include industrial process control and multi-sensor data acquisition, portable digital-panel meters, factory automation front-ends, environmental monitoring systems, and microprocessor-based instrumentation. The integrated multiplexer suits designs that sample many analog signals sequentially from sensors such as thermocouples, strain gauges, pressure sensors, and analog transducers. When designing with the MM74C948N, ensure the analog input signals stay within the device's specified input voltage range and that adequate decoupling is placed near the supply pins. The 116 us maximum conversion time sets the upper bound for per-channel throughput; sample-rate calculation must account for the SAR settling time when designing multiplexed acquisition loops. The PDIP-40 through-hole package supports easy prototyping and legacy designs but requires plated through-holes rather than SMD footprints. This page synthesizes distributor pricing from DigiKey/Mouser/Octopart, pin-compatible 40-pin PDIP drop-in alternatives, and practical design notes that go beyond the manufacturer datasheet.
MM74C949N - 8-Bit Microprocessor-Compatible ADC, 28-PDIP | TI
The Texas Instruments MM74C949N is a monolithic CMOS 8-bit microprocessor-compatible analog-to-digital converter (ADC) with an on-chip 8-channel analog multiplexer, housed in a 28-pin plastic DIP (28-PDIP) package and operating from a single +5 V supply. Per the manufacturer datasheet, the device delivers a successive-approximation conversion with an 8-channel analog input MUX, providing a single-chip data-acquisition front end for microprocessor-based systems. Key headline parameters include 8-bit resolution, an 8-channel single-ended multiplexer, a 5 V supply requirement, and 116 microseconds typical total conversion time. The CMOS construction yields low power consumption suitable for battery-instrumented and industrial control systems. What is an 8-bit ADC with multiplexer? An analog-to-digital converter transforms a continuous analog voltage into a discrete digital code; an 8-bit converter provides 256 quantization levels (LSB = FS/256). Adding an integrated analog multiplexer allows one ADC to sequentially digitize several analog sources, replacing multiple single-channel converters and reducing both board area and cost. MM74C949N belongs to the category hierarchy: ADC -> data converter -> data acquisition IC -> mixed-signal semiconductor, and integrates a successive-approximation register (SAR) architecture with CMOS logic and a tri-state output latch for direct connection to 8-bit microprocessors. Differentiating features include built-in sample-and-hold, software-configurable channel selection, and a microprocessor-compatible control interface that simplifies handshaking. The 8-channel input MUX is software-addressable, while the tri-state output buffer allows the ADC to share a data bus with other peripherals. Internal reference and clock generation minimize external component count, and the CMOS process delivers low quiescent current draw, suiting battery-powered or remote instrumentation. Operating temperature spans -40 C to +85 C, supporting industrial and commercial environments. Architecture-wise, the device uses a successive-approximation register driven by an internal RC oscillator to perform a binary search against the analog input. The 8-channel analog MUX is constructed from CMOS transmission gates, and a sample-and-hold capacitor holds the input during conversion. The digital interface generates standard microprocessor read/write handshake signals so the part can connect directly to an 8-bit data bus without glue logic. Typical applications include industrial process-control data acquisition boards, portable battery-powered instrumentation, multiplexed sensor monitoring in HVAC and environmental systems, automotive sensor interface subsystems, and microprocessor-based measurement front-ends. The integrated MUX is particularly useful when more than one analog source (temperature, pressure, flow, level) must be digitized by a single MCU. When designing with MM74C949N, ensure the analog input remains within the supply rails and that input source impedance is low enough to charge the internal sample-and-hold capacitor within the acquisition window. Add 0.1 microfarad decoupling close to the supply pin, and provide anti-alias filtering on each MUX channel. This page synthesizes distributor pricing, drop-in alternative analysis, and design notes beyond the manufacturer datasheet.
MX574AJMWI/PR+W - 12-Bit 40kSPS SAR ADC, 28-SOIC | Maxim Integrated
The Analog Devices (formerly Maxim Integrated) MX574AJMWI/PR+W is an industry-standard 12-bit successive-approximation analog-to-digital converter (SAR ADC) with a single-ended 1-input configuration, housed in a 28-pin SOIC (0.295 inch / 7.5 mm width) surface-mount package and specified for commercial temperature grade operation. It delivers up to 40 ksps sampling rate on a parallel data interface and integrates an on-chip clock and voltage reference, eliminating the need for external timing components and saving board area. The converter combines high-speed conversion with low power consumption, a hallmark of the legacy MAX174 / MX574A / MX674A ADC family. A successive-approximation register ADC is a type of data converter that resolves a sampled analog input one bit at a time using an internal binary-search algorithm and a precision DAC. SAR ADCs occupy the middle ground between slow but accurate delta-sigma converters and fast but noisy flash converters, and are commonly used when both deterministic latency (one conversion per N clock cycles) and moderate-to-high accuracy (10 to 16 bits) are required at sampling rates from a few kSPS up to several MSPS. As an ADC, this part belongs to the broader hierarchy: data converter -> ADC -> SAR ADC -> integrated circuit -> semiconductor. Key features include 12-bit resolution, a single-ended input, a parallel output bus, and built-in reference. The on-chip reference removes an external precision component, while the built-in clock simplifies timing by allowing an external crystal or RC to drive the converter. The wide 28-SOIC gull-wing footprint supports standard surface-mount assembly and hand-reworkable prototypes, and the commercial temperature grade makes the part well suited to lab and indoor equipment rather than harsh-environment installations. Typical applications include broadband fixed-line access equipment, test and measurement instrumentation, and enterprise machine control systems. The combination of moderate sampling speed, integrated reference, and parallel readout makes the MX574A family a long-time workhorse in process-control front ends and rack-mounted data-acquisition boards. The PR+W suffix denotes a specific reel and pin-1 orientation variant of the same silicon die as the MX574AJMWI/PR+, and is fully pin-compatible with the rest of the MX574A 28-SOIC family. This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes that are not consolidated in the manufacturer datasheet itself, giving procurement and design engineers a single reference for evaluating, sourcing, and replacing this legacy Maxim ADC.
MX574ALCWI+ - 12-Bit Precision SAR ADC, 28-SOIC | Maxim Integrated
The Analog Devices (formerly Maxim Integrated) MX574ALCWI+ is a 12-bit, successive-approximation-register (SAR) analog-to-digital converter with 1 single-ended input, supplied in a 28-pin SOIC package. Per the Maxim datasheet, it is part of the industry-standard MAX174/MX574A/MX674A family of complete 12-bit ADCs that integrate a high-speed SAR core, on-chip clock, internal buried-zener voltage reference, and a precision DAC, delivering a complete ADC function in a single IC. Typical conversion time is approximately 25 us using the internal clock and the internal 10V reference, which simplifies board design versus discrete ADC implementations. What is a SAR ADC? A successive-approximation-register analog-to-digital converter is a type of data converter that performs a binary search across an internal DAC to determine the digital code of the input analog voltage. SAR ADCs sit in the broader hierarchy of data converters (ADC -> data converter -> data acquisition -> signal chain IC -> semiconductor) and are valued for high accuracy, low latency, deterministic latency, and lack of pipeline delay - making them ideal for multiplexed data-acquisition front ends and industrial instrumentation. The MX574A/MX674A series is a long-standing industry workhorse used in legacy designs that still require drop-in replacements today. Key features include 12-bit resolution with no missing codes, +/-1 LSB maximum integral nonlinearity (INL) on the A-grade part, an internal 10V buried-zener reference with low drift, and flexible input ranges of 0V to 10V, 0V to 20V, +/-5V, and +/-10V selected by pin strapping. The device supports both unipolar and bipolar true-bipolar analog input operation without external signal conditioning. Throughput is up to 40 ksps using the internal clock and an external start-conversion pulse, and the device operates from +/-12V to +/-15V (or +5V digital supply). The SOIC-28 package exposes the analog inputs, reference, and digital bus separately for clean PCB layout. Technically, the MX574ALCWI+ uses a charge-redistribution SAR architecture with a thin-film resistor-ladder DAC and laser-trimmed reference. The on-chip clock oscillator eliminates the need for an external crystal or RC timing network for most applications. Three-state outputs allow direct connection to an 8-bit, 12-bit, or 16-bit microprocessor data bus, supporting both 8-bit and 16-bit read modes. A separate -12V/-15V analog supply and +5V digital supply isolate noisy digital currents from the analog input path. Typical applications include industrial process control and data acquisition, multiplexed analog input modules, precision instrumentation, vibration and strain-gauge signal conditioning digitizers, and medical monitoring front ends. Its single-supply bipolar input ranges also suit legacy PLC analog I/O cards and SCADA systems that still use +/-10V signal standards. Replacement situations are common, as the part is widely second-sourced by ADI/PMI and has been continuously manufactured for over three decades. When designing with this part, ensure the analog and digital grounds are separated at the IC and joined only at one point to prevent digital ground-return currents from coupling into the analog input. A 10 uF bypass cap on the +5V digital supply and a 10 uF + 0.1 uF combination on the +/-15V analog supplies minimize noise. The reference output (REF OUT, pin 11) should be buffered if multiple loads are driven, since the internal reference cannot supply heavy current. This page synthesizes distributor pricing, same-brand SAR ADC alternatives in SOIC-28, drop-in recommendations, and practical design notes not found on a single distributor listing, complementing the manufacturer datasheet.