ADC/DAC
Produits (2518)
MAX1430ETN+D - 15-Bit 100Msps IF ADC, 56-TQFN | Maxim Integrated
The Maxim Integrated (now Analog Devices) MAX1430ETN+D is a 15-bit, 100 Msps analog-to-digital converter optimized for intermediate-frequency (IF) sampling in communications receivers. It delivers a -76.8 dBFS noise floor, operates from a 5 V analog supply and a 3 V digital supply, and is housed in a 56-lead TQFN (8x8 mm) package. The integrated track-and-hold accepts a 2.2 VP-P differential full-scale input and supports a -1 dB full-power input bandwidth of 350 MHz. An ADC (analog-to-digital converter) is a mixed-signal integrated circuit that samples a continuous-time analog waveform and quantizes each instantaneous voltage into a binary codeword. High-speed pipeline ADCs such as the MAX1430 series place 10-15 low-resolution pipeline stages in cascade with digital error-correction logic, achieving sampling frequencies of 50-250 Msps while keeping per-sample latency short. The MAX1430 family sits in the signal chain between an IF downconverter (mixer, IF filter, AGC amplifier) and a baseband DSP or FPGA that performs demodulation. Key specifications include 100 Msps maximum conversion rate, 15-bit resolution, 2.2 VP-P differential full-scale input range, -76.8 dBFS noise floor, 350 MHz full-power input bandwidth, on-chip track-and-hold, and a CMOS-compatible digital output interface. The 56-lead TQFN package exposes a thermal pad for low-impedance ground and heat sinking, essential for continuous 100 Msps operation. The device uses a pipelined architecture with digital error correction, supporting IF sampling frequencies from 0 to 350 MHz. Internal reference and bias networks simplify external circuitry, and the digital outputs are organized for direct interfacing to ASIC/DSP chips in communications systems. Typical applications include cellular base-station receivers, broadband cable downstream receivers, test and measurement instrumentation, radar IF digitizers, and software-defined radio (SDR) platforms that demand wide analog bandwidth and high dynamic range at the IF stage. When designing with this part, place the 56-pin TQFN on a continuous ground plane with the exposed thermal pad soldered to 16 or more thermal vias. Decouple AVDD and DVDD separately with 0.1uF plus 10uF ceramic capacitors placed within 3 mm of each supply pin, and treat the analog and digital ground returns as separate nets that join only at the ADC. This page synthesizes distributor pricing, pin-compatible drop-in alternatives, and practical layout guidance beyond the manufacturer datasheet.
MAX1436ECQ+ - Octal 12-Bit 40Msps LVDS ADC | Maxim/Analog Devices
The Maxim Integrated (now Analog Devices) MAX1436ECQ+ is an octal, 12-bit, 40Msps analog-to-digital converter (ADC) with fully differential inputs, a pipelined architecture, digital error correction, and serial LVDS outputs, packaged in a 100-pin TQFP (14 mm x 14 mm x 1 mm) with an exposed thermal pad. The device operates from a 1.8 V analog supply and delivers serial LVDS output data to minimize pin count and EMI in multichannel systems. An analog-to-digital converter (ADC) is a mixed-signal integrated circuit that samples continuous-time analog signals and produces discrete-time digital codes proportional to the input amplitude. Within the converter hierarchy, the MAX1436 belongs to the pipeline ADC subclass, which interleaves multiple low-resolution stages to achieve high sampling rates while keeping per-stage power low. Octal pipeline ADCs such as the MAX1436 are widely used in ultrasound front ends, medical imaging arrays, communications base stations, and multi-channel instrumentation where eight synchronized channels of 12-bit conversion at 40Msps are required. Key specifications of the MAX1436ECQ+ include 12-bit resolution, 40Msps maximum sampling rate, an integrated input track-and-hold, internal voltage reference, and low-voltage differential signaling (LVDS) outputs that reduce ground bounce and radiated noise. The pin-compatible family offers higher speed grades (MAX1437 at 50Msps, MAX1438 at 65Msps), allowing designers to scale sampling rate without changing PCB layout. Architecturally, each of the eight ADC channels uses a fully differential switched-capacitor pipelined front end followed by digital error correction logic. The LVDS serializer consolidates eight channels' worth of parallel data onto a small number of differential pairs, simplifying board routing and reducing the number of digital supply pins required. The exposed pad (EP) on the TQFP package provides a low thermal resistance path to the PCB copper pour, critical because the LVDS drivers and converter cores dissipate power continuously at full sampling rate. Typical applications include ultrasound beamforming, medical imaging, instrumentation, multichannel communications, and phased-array radar. The wide input bandwidth and 40Msps rate make the part suitable for digitizing intermediate-frequency (IF) signals in software-defined radio receivers as well as time-interleaved acquisition systems. When designing with this device, place 0.1 uF and 10 uF decoupling capacitors as close as possible to each supply pin, and provide a solid ground plane beneath the exposed pad with a minimum of 16 thermal vias to keep junction temperature within the -40C to +85C operating range. Source impedance matching at the analog inputs is critical to preserve the specified spurious-free dynamic range (SFDR) at full-rate operation. This page synthesizes distributor pricing for MAX1436ECQ+, drop-in TQFP-100 pin-compatible alternatives, application references, and practical design notes not consolidated in the manufacturer datasheet.
MAX1436ECQ+TD - Octal 12-Bit 40Msps 1.8V ADC | Analog Devices
The Analog Devices MAX1436ECQ+TD is an octal, 12-bit, 40Msps analog-to-digital converter (ADC) with fully differential inputs, a pipelined architecture, and digital error correction. It operates from a single 1.8V supply and provides self-aligned serial LVDS outputs for data, clock, and frame-alignment signals, with the output data presented in two's complement or binary format. The device is housed in a 100-pin TQFP package (14 mm x 14 mm x 1 mm) with an exposed thermal pad, specified for the extended industrial temperature range of -40C to +85C. The MAX1436ECQ+TD belongs to the high-speed pipelined ADC product family, a category of converters that use a multi-stage pipeline architecture to achieve high sample rates (tens of Msps to >100 Msps) while maintaining 10- to 16-bit resolution. Within the broader data-converter hierarchy, the MAX1436 sits above general-purpose successive-approximation register (SAR) ADCs in sampling speed and below high-speed flash ADCs in resolution flexibility. Its 1.8V single-supply operation makes it a member of the low-voltage, high-speed mixed-signal IC family used extensively in portable ultrasound, multichannel communications, and instrumentation front-ends. Key specifications include a maximum sample rate of 40Msps, an integral nonlinearity (INL) of 0.5 LSB (typical), a signal-to-noise ratio (SNR) of 70 dB at 10 MHz input, and a spurious-free dynamic range (SFDR) of 85 dBc. The serial LVDS output interface reduces package pin count and simplifies board routing for multi-channel systems, while the pipelined architecture delivers single-clock-cycle conversion latency, simplifying digital-domain calibration pipelines. Typical applications span instrumentation, multichannel communications, ultrasound and medical imaging, and multichannel data acquisition systems where 8 simultaneous channels of 12-bit conversion are required at high throughput. The wide operating temperature range also supports industrial process-control front-ends. Pin-compatible variants listed in the datasheet allow upgrade to higher sample rates within the same PCB footprint. Designers should pay attention to the analog input common-mode voltage requirement and the LVDS output termination scheme. The exposed pad on the TQFP-100 package must be soldered to a sufficiently large copper pour to keep junction temperature within limits at full multi-channel conversion duty cycles. Decoupling capacitor placement adjacent to each supply pin is critical for achieving the published SNR figures.
MAX144BCUA - 12-Bit 108ksps 2-Ch SAR ADC | Maxim Integrated
The Maxim Integrated MAX144BCUA is a +2.7V to +5.25V, low-power, 2-channel, 108ksps, serial 12-bit successive-approximation analog-to-digital converter (ADC) housed in an 8-pin µMAX (8-MSOP) surface-mount package. The 'B' grade provides 12-bit resolution with ±1 LSB INL and the part is shipped in the commercial 0°C to +70°C temperature grade. The MAX144 family shares a common pinout with the MAX145 (14-bit version of the same die family), enabling drop-in compatibility when higher resolution is required. A SAR ADC (Successive Approximation Register Analog-to-Digital Converter) is a type of ADC that converts an analog input to a digital output using a binary search algorithm against an internal DAC. SAR ADCs are prized for low latency (single-cycle conversion), deterministic behavior, and low power consumption, which makes them ideal for multiplexed data-acquisition systems, sensor readouts, and battery-powered instrumentation. The MAX144 sits in the precision-low-power tier of the SAR ADC hierarchy: SAR ADC → successive-approximation ADC → ADC → data converter → signal chain IC → semiconductor. Key features include a 7.4 µs successive-approximation conversion time, automatic power-down between conversions reducing current to sub-µA, fast 2.5 µs wake-up, an internal 4.096 MHz oscillator, and a high-speed SPI/QSPI/MICROWIRE-compatible 3-wire serial interface. Two analog input channels are multiplexed to a single ADC core, and the device operates from a single 2.7V to 5.25V supply. The integrated input track-and-hold accepts full-scale inputs from 0 to VREF. Architecturally, the MAX144BCUA combines a charge-redistribution DAC with a successive-approximation register and on-chip clock, eliminating the need for an external oscillator. The proprietary AutoShutdown® mode drops supply current to 0.3 µA (typical) between conversions, drawing active current only when conversions are in progress. This combination of high throughput and nanoamp-level standby current makes it well-suited for power-budgeted portable and loop-powered systems. Typical applications include portable data logging, pen-tablet digitizers, battery-powered instrumentation, plus/minus instrumentation front ends, and process-control I/O modules. The part is also used in isolated sensor readouts where the low serial-interface pin count (4 signals: CS, SCLK, DOUT, DIN) simplifies optocoupler or digital-isolator bridges. A single-decoupling 0.1 µF ceramic capacitor close to VDD and a 10 µF bulk cap are typically sufficient. Reference decoupling with 1 µF plus 0.1 µF at REF is critical for 12-bit performance; avoid running digital traces under the analog input pins on the PCB. This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes not found in the manufacturer datasheet.
MAX144BEUA - 12-Bit 108ksps 2-Ch Serial ADC | Maxim
The Analog Devices (formerly Maxim Integrated) MAX144BEUA is a 12-bit, 108 ksps, 2-channel, low-power successive-approximation analog-to-digital converter (SAR ADC) housed in an 8-pin µMAX/uSOP package. It operates from a single +2.7 V to +5.25 V supply with separate analog and digital supply inputs, integrating a 7.4 µs successive-approximation ADC core, automatic power-down, fast 2.5 µs wake-up, an on-chip clock, and a high-speed 3-wire SPI/MICROWIRE-compatible serial interface. The "B" grade specifies the industrial operating temperature range of -40 °C to +85 °C. A SAR ADC (successive-approximation-register analog-to-digital converter) is a type of data converter that uses a binary-search algorithm against an internal DAC to resolve one bit per clock cycle. SAR ADCs occupy the middle ground between flash converters (fast but power-hungry, large) and sigma-delta ADCs (high resolution but lower speed, requires filtering). They are favored for multiplexed multi-channel data acquisition, sensor front-ends, and portable instrumentation where deterministic latency, low latency, low power, and small packages are simultaneously required. Key features of the MAX144BEUA include 2 single-ended analog input channels (AIN1, AIN2), an external reference input (REF), a low 1.6 mA typical supply current at 108 ksps, automatic power-down to < 1 µA between conversions, and the 8-pin µMAX (uSOP) footprint that saves board area versus 8-pin SOIC. The serial interface is compatible with SPI, QSPI, and MICROWIRE devices, simplifying connections to most microcontrollers and DSPs. The MAX144 family uses a charge-distribution DAC architecture combined with an on-chip clock and sample-and-hold, achieving ±1 LSB INL and DNL with no missing codes at 12 bits. Power-down is automatic at the end of each conversion, dropping the supply current to < 1 µA - critical for battery-powered applications that need long run-time. The fast 2.5 µs wake-up allows high throughput without duty-cycling penalty in burst-mode sampling. Typical applications include portable data logging, handheld multimeters and test instruments, battery-powered sensor readouts, industrial process control front ends, and medical instruments such as glucose meters and patient monitors. Two single-ended channels make the part especially suited to dual-sensor measurement (e.g., temperature + pressure, or two thermocouples). When designing with the MAX144BEUA, place the 0.1 µF supply bypass capacitor as close as possible to VDD and use a low-impedance external reference (such as MAX6126 or MAX6160) to maximize SNR. The serial interface is read-only on the MAX144 - host software must provide SCLK and read DOUT within the conversion window; consult the datasheet timing diagram before wiring to a busy SPI bus. This page synthesizes distributor pricing, drop-in and same-family alternatives from Maxim Integrated's MAX14x portfolio, and practical design notes not collected in the manufacturer datasheet alone.
MAX145ACPA - 12-Bit 108ksps 2-Ch Serial ADC | Maxim Integrated
The Maxim Integrated MAX145ACPA is a 12-bit, 108 ksps, 2-channel, low-power successive-approximation analog-to-digital converter (SAR ADC) in an 8-pin PDIP package, operating from a single +2.7 V to +5.25 V supply with built-in automatic power-down. The device features a 7.4 microsecond successive-approximation conversion engine, an on-chip clock, a high-speed 3-wire SPI/QSPI/MICROWIRE-compatible serial interface, and a 2.5 microsecond wake-up from shutdown for battery-friendly duty-cycled measurements. What is a low-power SAR ADC? A successive-approximation register ADC is a precision data converter type that resolves one bit per clock cycle using a binary search against an internal DAC; it sits in the taxonomy analog-to-digital converter -> data converter -> signal chain IC -> semiconductor. Compared with delta-sigma ADCs, SAR parts offer single-cycle latency and deterministic acquisition, which is why they dominate multiplexed multi-channel data-acquisition front ends, sensor readouts, and embedded instrumentation loops. Key specifications include 108 ksps maximum sampling rate, +/-1 LSB INL (max), +/-1 LSB DNL (no missing codes guaranteed), an internal 2.5 V reference option plus external reference mode, single-ended analog inputs with channel 2 configurable as pseudo-differential, and 1.5 mA maximum supply current at 108 ksps dropping to under 1 microamp in power-down. The MAX145ACPA guarantees 0.1 LSB sample-to-sample crosstalk between its two input channels and provides a serial interface software-select. Architecturally, the MAX145 combines an input track-and-hold, a capacitive-charge redistribution DAC, a comparator and SAR logic, plus the on-chip oscillator and reference buffer. The auto-power-down feature draws under 1 microamp between conversions, making it ideal for duty-cycled battery measurements. The MAX145ACPA is the pseudo-differential input variant of the family (max 127 distinguishes true-differential MAX144 versus pseudo-differential MAX145 versus single-channel MAX144). Typical applications include portable data loggers, loop-powered 4-20 mA sensor transmitters, handheld multimeters, battery monitoring boards, thermistor/RTD signal conditioning, and industrial process-control front ends. The wide 2.7 V to 5.25 V supply range lets it share the same rails as the host microcontroller. When designing with the MAX145ACPA, place a 0.1 microfarat decoupling capacitor close to the supply pin and respect the 8 microsecond acquisition-time minimum after channel switching. Drive CS low to initiate conversion and read the MSB-first data on the falling edge of SCLK per the SPI timing diagram in the datasheet. This page consolidates distributor pricing for the MAX145ACPA in 8-pin PDIP, drop-in equivalents, comparison against the MAX144 family siblings, and practical design notes that are not aggregated on any single distributor listing.
MAX145ACUA - 12-Bit 108ksps 1-Ch SAR ADC, 8-µMAX | Analog Devices
The Maxim Integrated MAX145ACUA (now part of Analog Devices) is a 12-bit, 108 ksps, low-power, pseudo-differential, 2-channel successive-approximation analog-to-digital converter (SAR ADC) in an 8-pin µMAX/uSOP surface-mount package. It operates from a single +2.7 V to +5.25 V supply and features an internal track/hold, on-chip clock, automatic power-down, fast 2.5 µs wake-up, and a high-speed 3-wire SPI/QSPI/MICROWIRE-compatible serial interface. The MAX145ACUA also includes the "A" temperature grade variant specified for commercial 0 °C to +70 °C operation. A SAR (successive-approximation-register) ADC is a type of analog-to-digital converter that uses a binary search through an internal DAC to convert an analog input to a digital code one bit per clock cycle. SAR ADCs combine very low latency (one conversion cycle, no pipeline delay), excellent DC accuracy, and simple serial interfaces. They sit within the broader category of data converters (ADC/DAC) under signal-chain ICs and are typically the right choice when a system needs deterministic single-shot sampling at moderate speeds, low power, and small footprint - as opposed to high-speed pipeline ADCs or integrating ADCs optimized for very low noise at slow rates. The MAX145 family delivers 108 ksps sampling at 0.9 mA (with VDD = +3 V) and drops to just 100 µA at 10 ksps and 10 µA at 1 ksps. Power-down current is 0.2 µA, making the part ideal for battery-powered and portable data-acquisition systems. The internal 2.5 MHz typ oscillator and the integrated track/hold eliminate the need for an external precision clock and a front-end sample-and-hold amplifier. Typical applications include pen-digitizers, portable instrumentation, data loggers, isolated measurement front-ends, and 4–20 mA loop-powered sensors. The MAX145 is also well suited for medical monitoring accessories and industrial process control modules that must operate for long periods from a small battery. When designing with the MAX145ACUA, ensure the analog input remains within the pseudo-differential common-mode range and that REF+ / REF- decoupling is placed as close as possible to the pins. For systems that require true bipolar or fully differential inputs, prefer the MAX144 (single-ended) or a dedicated delta-sigma ADC instead. This page consolidates distributor pricing, drop-in alternatives, and engineering notes that supplement the manufacturer datasheet, including selection guidance versus the MAX144 and competitor 8-pin SAR ADCs.
MAX145AEPA - 12-Bit 108ksps 2-Ch Serial ADC | Analog Devices
The Analog Devices (formerly Maxim Integrated) MAX145AEPA is a +2.7V to +5.25V, low-power, 2-channel, 108ksps, serial 12-bit successive-approximation analog-to-digital converter (SAR ADC) housed in an 8-pin plastic DIP (PDIP) package. The automotive-grade 'E' suffix indicates an extended -40C to +85C operating temperature range. The device integrates a 2.5V internal reference, on-chip clock generator, automatic power-down, fast 2.5us wake-up, and a high-speed 3-wire SPI/QSPI/MICROWIRE-compatible serial interface, providing a complete compact data-acquisition front end for low-power embedded designs. What is a SAR ADC? A successive-approximation-register analog-to-digital converter is a precision ADC architecture that uses a binary-search algorithm against an internal DAC to resolve an analog sample one bit at a time over N conversion cycles for N-bit resolution. SAR ADCs occupy the middle ground between flash ADCs (very fast, high power, low resolution) and sigma-delta ADCs (high resolution, lower bandwidth): they deliver medium-to-high resolution (12-18 bits typical) at medium-to-high speed (tens to thousands of ksps) with no pipeline latency, making them ideal for multiplexed multi-channel data acquisition, instrumentation, and control-loop sampling. SAR ADCs belong to the data-converter IC family, which sits inside the broader mixed-signal and power-management hierarchy of an embedded system. Key features include 108ksps throughput, ±1 LSB (max) integral nonlinearity (INL), ±0.5 LSB differential nonlinearity (DNL, no missing codes), a true-differential analog input stage on the MAX145 (single-ended on MAX144), and 3.2mW active power consumption at VDD = +3.6V dropping to under 10uA in shutdown. The 8-pin DIP footprint enables easy through-hole prototyping, breadboarding, and repair-friendly designs where hand-soldering or socket-mounting is preferred over SMD. The MAX145AEPA is a popular drop-in companion to the MAX144AEPA for designs that need true-differential inputs at the same 12-bit resolution and serial interface. Typical applications include handheld multimeters and test instruments, portable battery-powered sensor readout boards, industrial process-control loops, panel meters, temperature/voltage data loggers, and portable medical monitoring. The wide supply range (2.7V to 5.25V) lets a single part serve both 3.3V microcontroller rails and 5V analog front ends without level-shifting. When designing with the MAX145AEPA, place 0.1uF bypass capacitors close to the AVDD and DVDD pins (these are tied together on the 8-pin DIP) and ensure the SPI SCLK line is free of glitches because the device lacks an SCLK noise filter. Use the active-low SHDN pin to drop quiescent current below 10uA between conversions in battery-powered designs.
MAX145AEUA - 12-Bit 108ksps 2-Ch Serial ADC | Maxim Integrated
The Maxim Integrated MAX145AEUA is a 12-bit, 108 ksps, 2-channel, low-power successive-approximation analog-to-digital converter (SAR ADC) in an 8-pin µMAX (uSOP) package. It operates from a single +2.7V to +5.25V supply and features two pseudo-differential analog input channels, automatic power-down, fast 2.5 µs wake-up, an on-chip clock, and a high-speed 3-wire SPI/QSPI/MICROWIRE-compatible serial interface. An SAR ADC is a type of analog-to-digital converter that uses a successive-approximation register to compare the input voltage against a precision DAC, bit-by-bit, achieving conversion in a fixed number of clock cycles. SAR ADCs occupy a niche between flash ADCs (fast, low resolution, high power) and sigma-delta ADCs (high resolution, slow). The MAX145 belongs to the broader data-converter IC family, itself a subset of signal-chain semiconductors that include amplifiers, filters, and references. Its low 3.2 mW power consumption at VDD = +3.6V makes it well-suited to battery-powered and portable designs. The MAX145AEUA's -A temperature grade extends the operating range from -40°C to +85°C, suiting industrial environments. It supports a 7.4 µs successive-approximation ADC core, automatic power-down between conversions to save energy, and a fast 2.5 µs wake-up time that keeps average current low in multiplexed, multi-channel scans. The internal 4.096V or external reference option (chosen by the REF pin) gives designers flexibility between absolute accuracy and ratiometric measurement. Architecturally, the part combines a switched-capacitor input track-and-hold, an internal clock generator, and a precision comparator under SAR control. The pseudo-differential input configuration rejects common-mode noise and is especially useful when reading signals referenced to a non-ground midpoint, such as bridge sensors, thermistors, or battery-stack mid-points. The MAX145AEUA differs from the pin-compatible MAX144 only by analog input topology: MAX144 is single-ended, while MAX145 is pseudo-differential. Typical applications include portable data logging, hand-held instrumentation, battery-powered sensors, isolated industrial monitoring with 4-20 mA loops, and digital panel meters. Designers favor the MAX145AEUA when they need true 12-bit accuracy on a tiny µMAX footprint, an easily-driven serial interface, and standby currents low enough to leave the ADC in-circuit all the time. A key design consideration is supply bypassing: place a 0.1 µF ceramic capacitor as close as possible to the VDD pin, plus a 4.7 µF tantalum or larger ceramic cap on the same node, to suppress digital switching noise. The reference pin must be bypassed with at least 0.1 µF, and a 10 µF cap stabilizes the reference when using the internal 4.096V source. Trace lengths from CNVST, SCLK, and DOUT should be kept short, and the AGND pin must tie directly to a low-impedance ground plane to avoid digital-coupling errors. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
MAX145BEPA - 12-Bit 108ksps 2-Ch Serial ADC | Maxim Integrated
The Maxim Integrated MAX145BEPA is a +2.7V to +5.25V, low-power, 2-channel, 108ksps, 12-bit successive-approximation analog-to-digital converter (ADC) housed in an 8-pin PDIP package. According to the Analog Devices / Maxim MAX144/MAX145 datasheet, the device features a 7.4 microsecond successive-approximation ADC core, automatic power-down, a 2.5 microsecond wake-up time, an on-chip clock, and a high-speed 3-wire SPI/QSPI/MICROWIRE-compatible serial interface. A SAR (Successive Approximation Register) ADC is a type of analog-to-digital converter that uses a binary search algorithm through an internal DAC to digitize an analog input one bit at a time per clock cycle. SAR ADCs are prized for low latency (deterministic acquisition time), high accuracy at moderate sample rates, and the absence of pipeline delay, making them well-suited to multiplexed multi-channel data-acquisition systems, instrumentation, and process control. Key features include two single-ended analog input channels (CH0, CH1) selected via software, an analog supply range of +2.7V to +5.25V, an external reference input (REF), and a low supply current that drops to microamp levels in power-down mode. The MAX145BEPA industrial-grade (-40C to +85C) PDIP package supports through-hole assembly and is fully RoHS compliant in the + variant (MAX145BEPA+). Architecturally, the MAX145BEPA integrates an input sample-and-hold, an internal 12-bit DAC, a comparator, a successive-approximation register, and SPI-compatible digital I/O on a single CMOS die. The automatic power-down function between conversions reduces average supply current to a fraction of the active value, which is critical for battery-powered or energy-harvesting applications. Typical applications include portable data loggers, industrial process-control front-ends, battery-powered instrumentation, sensor signal conditioning read-out, and handheld metering equipment where 12-bit resolution at up to 108 kilosamples per second is sufficient. When laying out a PCB, keep analog and digital grounds joined at a single point near the ADC GND pin to preserve the 12-bit accuracy across the full sample rate.
MAX145BEUA - 12-Bit, 108ksps, 2-Ch SAR ADC | Maxim Integrated
The Maxim Integrated MAX145BEUA is a 12-bit, 108ksps, 2-channel successive-approximation analog-to-digital converter (ADC) housed in an 8-pin μMAX package. It operates from a single +2.7V to +5.25V supply, features a 7.4 µs successive-approximation conversion cycle, automatic power-down, 2.5 µs wake-up, an internal 4 MHz oscillator, and a high-speed 3-wire SPI/QSPI/MICROWIRE-compatible serial interface. An ADC (analog-to-digital converter) is a data-conversion IC that samples a continuous analog voltage and converts it into a discrete digital code proportional to the input level. SAR (successive-approximation register) ADCs balance speed, resolution, and power efficiency, making them the dominant architecture for multiplexed low-power sensing and instrumentation. Within the broader IC hierarchy: ADC -> data converter -> mixed-signal IC -> signal chain -> semiconductor. SAR ADCs are typically preferred over delta-sigma or pipelined types when low latency, low power, and moderate resolution (10-16 bits) are required at sample rates up to a few hundred kilosamples per second. The MAX145's two analog input channels, plus its low-power shutdown mode that draws typically < 1 µA between conversions, make it well suited to portable, multiplexed sensor systems. The 8-pin μMAX footprint and 3-wire serial interface reduce board area and pin count compared to parallel-output ADCs. The successive-approximation architecture uses an internal binary-weighted capacitor DAC and comparator. Each conversion takes 7.4 µs, and the serial interface streams out 12 bits at clock rates up to the internal 4 MHz oscillator limit, allowing the host microcontroller to read conversions quickly between samples. Typical applications include portable data loggers, battery-powered instrumentation, multiplexed sensor signal chains (temperature, pressure, strain gauge), loop-powered 4-20 mA transmitters, and handheld meter front-ends where low supply current, small PCB area, and a simple SPI host interface are essential design constraints. When designing with the MAX145BEUA, place a 0.1 µF decoupling capacitor as close as possible to the VDD pin and ensure the analog input traces are routed away from digital switching nodes to minimize coupling noise. Use the automatic power-down mode between conversions to achieve < 1 µA quiescent current in duty-cycled sensor applications. This page synthesizes distributor pricing, pin-compatible drop-in alternatives, practical layout notes, and an FAQ set not found on the manufacturer datasheet, giving engineers a single source for part selection, sourcing, and design guidance.
MAX146AEAP - 12-Bit 8-Ch 133 kSPS SAR ADC | Analog Devices
The Analog Devices MAX146AEAP is a +2.7V low-power, 8-channel, serial 12-bit successive-approximation analog-to-digital converter (SAR ADC) housed in a 20-pin SSOP (EAP) package. It integrates an 8-channel analog input multiplexer (4 differential or 8 single-ended), a high-bandwidth track-and-hold, a 2.5V internal reference (the MAX146 variant), a serial SPI/QSPI/MICROWIRE-compatible interface, and a low-power shutdown mode, sampling at up to 133 kSPS. A SAR ADC is a type of analog-to-digital converter that uses a binary-search successive-approximation algorithm to convert an analog input to a digital code in a fixed number of clock cycles per conversion. SAR ADCs sit between delta-sigma converters (which trade speed for resolution) and flash ADCs (which offer speed but consume large power and silicon area), making them the workhorse choice for multiplexed data-acquisition channels at medium speeds (10 kSPS to 1 MSPS) and moderate resolution (10 to 16 bits). Key features of the MAX146AEAP include 133 kSPS throughput, low 1.3 mA operating supply current (shutting down to 1 microamp between conversions), single +2.7V to +5.25V analog supply operation, hard-wired active-low SHDN-bar input plus software-controllable auto-shutdown at end-of-conversion, an internal 2.5V reference with ±1.5% adjustable range via the reference-buffer amplifier, and integrated input protection rated to ±16V (allowing direct connection to industrial sensor lines without external clamping). The device uses a capacitive-DAC SAR core with auto-calibrated MSBs and a low-drift buried-zener reference, achieving ±1 LSB INL (max) and ±1 LSB DNL (no missing codes at 12 bits). The high-bandwidth track-and-hold supports input bandwidths above 2 MHz, preserving accurate capture of fast transient signals. A serial digital interface runs from a separate +2.7V to +5.25V digital supply, enabling mixed-voltage designs where the ADC and downstream microcontroller use different rails. Typical applications for the MAX146AEAP include portable battery-powered data loggers, multichannel sensor-front-end digitizers (thermocouple, strain-gauge bridge, pressure transducer), industrial process-control instrumentation with 4-20 mA loop inputs, patient-monitoring medical devices, and automotive body-system sensor acquisition. The integrated 8-channel mux and internal reference minimize BOM cost and PCB area. When designing with the MAX146AEAP, place a 0.1 microfarad ceramic bypass capacitor within 5 mm of AVDD and a 1 microfarad tantalum or ceramic capacitor between REF and AGND, and connect AVSS/DVSS to a clean ground plane. Drive unused analog input pins to a valid DC level (AVDD or AVSS) to prevent input-channel crosstalk; do not leave analog inputs floating. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
MAX146AEPP+ - 12-Bit 8-Ch 133ksps ADC | Maxim Integrated
The Maxim Integrated MAX146AEPP+ is a 12-bit, 8-channel, low-power, serial-interface successive-approximation ADC housed in a 20-pin PDIP (EPP) package. It accepts either 8 single-ended or 4 differential analog inputs and supports throughput rates up to 133 ksps. The device operates from a +2.7 V to +3.6 V single supply, drawing only about 1.2 mA at full speed and dropping to under 1 µA in shutdown. An SAR ADC (Successive-Approximation Register Analog-to-Digital Converter) is a precision data-conversion architecture that resolves each conversion in a fixed number of clock cycles by binary-searching against an internal DAC. SAR ADCs offer a deterministic latency, no pipeline delay, and excellent DC accuracy, making them a workhorse for multiplexed multi-channel data-acquisition systems, sensor readout, and instrumentation front-ends where the input signal bandwidth is below a few hundred kHz. Key features of the MAX146AEPP+ include an internal 2.5 V reference (with separate REFADJ pin for fine adjustment), a low-noise sampling front-end, hardware-/software-configurable unipolar/bipolar input ranges, and an SPI/QSPI/MICROWIRE-compatible serial interface. Internal autoshutdown between conversions drops the supply current dramatically for battery-powered or duty-cycled applications. The device also provides an analog input clamp that protects the input from over-voltage transients. Typical applications include portable instrumentation, 4-20 mA industrial loop digitizers, multi-channel sensor data loggers, patient monitoring front-ends, and front-panel meter signal conditioning. The MAX146AEPP+ is pin-compatible with the MAX146BEPP+ (higher-speed variant) and other members of the MAX146 family in the same 20-pin PDIP footprint, simplifying system upgrades and BOM substitutions. When designing with this device, decouple VDD with a 10 µF and 0.1 µF capacitor pair placed within 5 mm of the supply pins, route the analog and digital grounds separately back to a single star point, and keep the analog inputs away from the serial clock trace. The internal reference is adequate for many applications, but an external low-noise reference (e.g. MAX6126) is recommended for absolute accuracy better than ±2 LSB. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.
MAX146BCAP - 12-Bit 8-Ch 133kSPS Serial ADC | Maxim Integrated
The Maxim Integrated MAX146BCAP is a +2.7V, low-power, 8-channel, 12-bit successive-approximation analog-to-digital converter (ADC) housed in a 20-pin SSOP package with a 133 kSPS sampling rate. According to the Analog Devices MAX146 datasheet, it integrates an 8-channel analog multiplexer, a high-bandwidth track/hold amplifier, and an internal 2.5V reference on-chip, and communicates through a SPI/QSPI/MICROWIRE-compatible serial interface. The device targets battery-powered and portable data-acquisition systems where low current draw and small footprint are critical. An ADC (Analog-to-Digital Converter) is a mixed-signal integrated circuit that quantizes a continuous-time analog input voltage into a discrete digital code. The MAX146 belongs to the successive-approximation register (SAR) ADC family, which trades raw speed for excellent DC accuracy and very low power consumption per conversion. In a typical signal chain (sensor -> amplifier -> ADC -> microcontroller), the ADC digitizes the conditioned analog signal so that a digital controller can process, log, or transmit the reading. MAX146-class devices sit between precision delta-sigma ADCs (slower, higher resolution) and high-speed flash ADCs (faster, lower resolution) on the performance-versus-speed spectrum, and they are widely used in industrial control, instrumentation, and embedded monitoring designs. Key features of the MAX146BCAP include 133 kSPS maximum sampling rate, an 8-channel single-ended or 4-channel differential input multiplexer, software-configurable unipolar/bipolar input ranges, an internal 2.5V reference with a ±1.5% buffer adjustment range, a hardware SHDN-bar pin plus software power-down that drops supply current to under 10 uA between conversions, and an automatic end-of-conversion shutdown mode for battery-aware applications. Operating supply range spans +2.7V to +3.6V on AVDD and +2.7V to DVDD +0.3V on DVDD, and the device is specified over the 0C to +70C temperature range in this CAP commercial-grade variant. Typical applications for the MAX146BCAP include portable data loggers, patient-monitoring and medical instruments, battery-powered sensor front ends, factory-automation signal conditioning, and embedded system analog I/O expansion for microcontrollers lacking an internal ADC. Its low-power operation and integrated multiplexer make it well-suited for multi-sensor monitoring in remote or wearable nodes. When designing with this device, use a clean analog ground plane and keep digital traces away from analog inputs; place the 10uF X7R bypass capacitor on AVDD as close to the pin as possible. The serial-interface SCLK should be kept under 2 MHz to preserve ADC linearity and avoid coupling digital noise into the analog input. Drive SHDN-bar high during normal operation and pull it low only between conversions to enter shutdown.
MAX147AEAP - 12-Bit 8-Ch SAR ADC, 133ksps, Serial | Maxim Integrated
The Maxim Integrated MAX147AEAP is a +2.7V, low-power, 8-channel, 12-bit successive-approximation analog-to-digital converter (SAR ADC) with a serial (SPI/QSPI/MICROWIRE-compatible) interface, supplied in a 20-pin SSOP package. It accepts single-ended inputs on 8 channels (or 4 differential inputs), samples at up to 133 ksps, and operates from a single +2.7V to +5.25V analog supply while the digital supply (VDD) tolerates +2.7V to +5.25V independently. The MAX147AEAP is the variant that requires an external reference voltage, whereas the closely related MAX146AEAP uses an internal 2.5V reference. What is a SAR ADC? A successive-approximation-register analog-to-digital converter is a precision data-conversion architecture that uses a comparator, a DAC, and a binary search register to converge on the input voltage one bit at a time over N conversion cycles. SAR ADCs sit in the precision-ADC family hierarchy between flash ADCs (fastest, lowest resolution) and sigma-delta ADCs (highest resolution, slowest), and are widely used in multiplexed data-acquisition front-ends, sensor arrays, and process-control I/O where mid-resolution, low-power, and deterministic latency matter most. Key features of the MAX147AEAP include a hardware SHDN (active-low shutdown) pin, software-selectable power-down between conversions, automatic end-of-conversion shutdown, an internal reference-buffer amplifier with ±1.5% voltage adjustment, and a serial interface that can be software-configured for unipolar/bipolar (0 to VREF or -VREF/2 to +VREF/2) operation. The 20-SSOP package keeps the part compact for high-channel-count boards. Architecturally, the device combines an input track-and-hold with a capacitive-charge redistribution DAC array and a precision comparator. The serial interface provides galvanic-isolation-friendly operation - the chip can be located adjacent to sensors while the host MCU is electrically isolated, ideal for medical, industrial, and process-control front-ends. Throughput scales with serial clock, and an external reference allows the user to trade off input range versus noise (e.g., 2.5V reference at 5.25V AVDD provides 12 bits of headroom with low LSB-weighted noise). Typical applications include portable instrumentation, multi-channel sensor readout (thermistors, RTDs, strain gauges), pen-digitizer and touchscreen front-ends, battery-powered data loggers, and 4-20 mA loop-powered process-control digitizers. The chip's low 1.2 mA supply current at full speed, falling to sub-microamp levels in shutdown, makes it well suited to solar- or battery-powered remote telemetry. A key design consideration is reference-decoupling: place a low-ESR 10 µF tantalum plus a 0.1 µF ceramic directly at REF with a short ground return. The input source impedance should be kept below ~1 kΩ so the track-and-hold can settle within the acquisition window at full throughput. This page synthesizes distributor inventory, parametric drop-in alternatives, and design notes not found in the manufacturer datasheet - useful for engineers evaluating second-source or pin-compatible replacements.
MAX147AEAP+TG05 - 12-Bit 8-Ch Serial ADC, SSOP-20 | Maxim
The Analog Devices / Maxim Integrated MAX147AEAP+TG05 is a +2.7V, low-power, 8-channel, serial 12-bit analog-to-digital converter (ADC) in a 20-pin SSOP package with hard-wired SHDN pin and software-selectable power-down. Per the manufacturer datasheet the MAX147 operates from a single +2.7V to +3.6V supply, integrates an 8-channel analog multiplexer, a high-bandwidth track/hold amplifier, and a successive-approximation register (SAR) ADC that delivers up to 133 ksps conversion rate while drawing only 1.2 mA operating current. The suffix "TG05" denotes tape-and-reel packaging with a customer-specific lot code, while the MAX147 family itself uses the 20-pin SSOP pinout standard for the line. An SAR ADC is a successive-approximation analog-to-digital converter that performs a binary-search conversion against a precise internal DAC; SAR is favored over delta-sigma in low-latency, multi-channel data-acquisition systems because it samples the analog input on demand without requiring a continuous running modulator. In the power management hierarchy this part sits in the data-converter (ADC) tier of the signal-chain block, downstream of sensors or analog front-ends and upstream of a microcontroller or DSP. Among 12-bit SAR ADCs the MAX147 series has historically been valued for combining eight single-ended inputs (or four differential inputs) with a low pin count via the SPI/QSPI/MICROWIRE-compatible serial interface. Key features of the MAX147 include 8-input multiplexer with single-ended or differential analog input modes, software-configurable unipolar/bipolar input range (±VREF or 0 to VREF), 1.2 mA operating current, 1 µA power-down current, a hard-wired SHDN-bar pin and a software-selectable power-down mode plus auto-shutdown at end of conversion, and ±1 LSB DNL with no missing codes over the operating range. The internal +2.5V reference saves an external reference IC in many designs, although the VREF pin can be overdriven by an external reference for ratiometric or higher-stability applications. Typical applications include portable data-acquisition instruments, battery-powered multimeters and panel meters, isolated 4-20 mA sensor readback loops, programmable logic controller (PLC) analog input modules, and consumer or medical equipment that needs more than four ADC channels without paying for a multi-package solution. Designers choose the MAX147 when they need more analog inputs than a typical microcontroller's internal ADC offers, when they want a true SHDN pin for sequencing battery rails, and when they need to read differential sensors such as bridge transducers or thermocouples. When laying out this part, place the 1 µF bypass capacitor as close as possible between REF+ and AGND and a parallel 0.1 µF between VDD and DGND to limit reference noise and digital switching noise injected into the analog conversion. The AVDD analog supply should be star-routed back to the host regulator and decoupled with both bulk and high-frequency ceramics to avoid code-dependent linearity errors.
MAX147AEAP+TG068 - 12-Bit 8-Ch Serial ADC | Maxim Integrated
The Maxim Integrated MAX147AEAP+TG068 (now under Analog Devices) is a 12-bit, low-power, 8-channel serial analog-to-digital converter (ADC) in a 20-pin SSOP package, supplied on tape-and-reel with the +TG068 customer-specific suffix. The device combines an 8-channel single-ended or 4-channel differential input multiplexer, a high-bandwidth track/hold, and a serial (SPI/QSPI/MICROWIRE-compatible) interface, sampling at up to 133 ksps while consuming only 1.5 mA at maximum throughput. A successive-approximation-register (SAR) ADC is a type of data converter that uses a binary search algorithm against an internal DAC to digitize an analog input in N clock cycles, where N is the resolution in bits. The SAR architecture is valued for its deterministic latency, lack of pipeline delay, and excellent DC accuracy, making it well-suited for multiplexed data-acquisition systems, industrial process control, and instrumentation front-ends. Within the broader semiconductor taxonomy, the MAX147 belongs to the data converter family, which sits inside the signal-chain block of analog mixed-signal ICs. Key features of the MAX147 include a single +2.7 V to +3.6 V supply operation (MAX147 variant), an internal 2.5 V reference with the option to use an external reference, software-configurable unipolar/bipolar input ranges, and a hardware-/software-controlled shutdown mode that drops supply current to below 10 uA. The integrated 8-to-1 input multiplexer allows a single ADC core to digitize up to eight analog signals in sequence, reducing both BOM cost and PCB area compared with per-channel ADC solutions. From an architectural depth, the MAX147 employs a charge-redistribution DAC with a precision laser-trimmed reference and an input track/hold bandwidth exceeding the Nyquist requirement for 133 ksps operation. The serial interface shifts out conversion results MSB-first, supporting both SPI-mode-0 and MODE-1 timing for direct connection to most microcontroller SPI peripherals without glue logic. Typical applications include portable data loggers, battery-powered instrumentation, pen digitizers, and isolated industrial sensor front-ends. Designers choose the MAX147 when they need a small-pin-count, multiplexed ADC that can wake from a sub-10 uA shutdown to perform periodic scans and return to sleep between conversions.
MAX147AEPP - 12-Bit 8-Ch Serial ADC, +2.7V, 20-PDIP | Maxim
The Maxim Integrated (now Analog Devices) MAX147AEPP is a +2.7V, low-power, 8-channel, serial 12-bit successive-approximation analog-to-digital converter (ADC) housed in a 20-pin PDIP package. The device combines an 8-channel single-ended (or 4-channel differential) input multiplexer, a high-bandwidth track-and-hold amplifier, an on-chip +2.5V reference, and an SPI/QSPI/MICROWIRE-compatible serial interface that operates up to 2 MHz. The single +2.7V to +3.6V supply and 1.2 mA (typ) operating current make it a strong fit for battery-powered and portable data-acquisition front ends. What is a successive-approximation ADC? It is a type of analog-to-digital converter that performs a binary search across the input range using an internal DAC and comparator, producing N bits of resolution in N conversion cycles. SAR ADCs are valued for low power consumption, deterministic latency, and the absence of pipeline delay, which makes them ideal for multiplexed data acquisition, instrumentation, and process control. The MAX147AEPP sits in the power-management-adjacent signal chain category of mixed-signal ICs, between the analog front end (sensor + amplifier) and a microcontroller's SPI port. Key features of the MAX147AEPP include 8 analog input channels (4 differential pairs), 12-bit resolution with ±1 LSB (max) INL/DNL, an internal +2.5V reference (with the option to drive an external reference up to +5V for wider spans), software-configurable unipolar or bipolar input ranges, and an automatic power-down mode that drops the supply current to about 1 µA between conversions. The serial interface supports daisy-chaining of multiple MAX147/MAX146 devices on a single SPI bus, reducing microcontroller pin count in multi-ADC systems. Architecturally, the MAX147AEPP integrates the MUX, T/H, SAR core, reference, and clock generator on a single CMOS die. The internal 4 MHz oscillator drives the SAR conversion, and the track-and-hold settles to 0.5 LSB in under 1.5 µs, supporting the full 133 ksps throughput at 2 MHz SCLK. The internal reference is trimmed to ±0.5% accuracy and the input ESD structures withstand ±15 kV HBM on analog inputs when configured per the datasheet protection network. Typical applications include portable instrumentation and data loggers, battery-powered sensor interfaces (thermocouple, RTD, strain-gauge bridges), industrial process-control analog front ends, patient monitoring and medical instruments, automotive sensor multiplexing, and 4-20 mA loop digitization. The MAX147AEPP is also commonly used in pen-tablet digitizers and weigh scales where multiple analog inputs are scanned sequentially. When designing with this device, place the 0.1 µF VDD bypass capacitor within 1 cm of the VDD pin, and if an external reference is used, add a 4.7 µF tantalum plus 0.1 µF ceramic network close to REF. The serial-interface lines (SCLK, DIN, DOUT, CS) must be guarded against digital switching noise because activity on these lines can couple into the analog input via the package substrate; keep digital traces short and away from AIN0-AIN7. This page synthesizes current distributor stock and pricing, pin-compatible drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone, giving an engineer a single-page view of the MAX147AEPP's position in the modern SAR ADC landscape.
MAX148ACAP+T - 10-Bit 8-Ch SAR ADC 133ksps 20-SSOP | Maxim
The Maxim Integrated (Analog Devices) MAX148ACAP+T is a 10-bit, 8-channel, low-power successive-approximation analog-to-digital converter (SAR ADC) with a 133 ksps sampling rate in a 20-pin SSOP package. The "A" suffix denotes the extended sampling-rate grade (133 ksps vs 90 ksps for the MAX148B/C grades), and the "CAP" suffix denotes the 20-pin SSOP with commercial temperature grade (0C to +70C). The "+T" suffix indicates Tape & Reel packaging. A SAR ADC is a type of analog-to-digital converter that uses a binary search through each bit to approximate the input voltage, performing one conversion per N clock cycles (N = resolution in bits). SAR ADCs excel at medium-speed, medium-resolution conversions with deterministic latency, no pipeline delay, and very low power consumption, which is why they dominate battery-powered industrial sensor, panel-meter, and data-acquisition applications. Key features of the MAX148ACAP+T include a single +2.7V to +5.25V supply (typically +5V), an 8-channel single-ended or 4-channel differential analog input multiplexer with high-bandwidth track/hold, an SPI/QSPI/MICROWIRE-compatible serial interface, hardware and software shutdown modes (less than 10 microA quiescent current in shutdown), and an internal 4.096V or external reference option. The MAX148 provides 0 to +5V unipolar input range with the internal reference. Architecture: the chip combines a track/hold front-end, an 8-to-1 analog mux, a charge-redistribution SAR core, and an internal reference. The internal reference is selectable to either 4.096V (for 0-5V unipolar input, MAX148) or 2.048V (for 0-2.5V unipolar input). The serial interface can clock up to 2.1 MHz, supporting full-speed conversions at the 133 ksps maximum rate. Typical applications include 4-20mA loop-powered industrial sensors, panel meters and digital multimeters, data-acquisition cards, portable instrumentation, and battery monitoring systems. Designers choose this part for its combination of 8 channels, low power, and small SSOP footprint. The trade-off versus higher-resolution ADCs (12, 14, 16-bit) is dynamic range. The MAX148 offers 10-bit resolution (about 60 dB SNR), so designs requiring better than 0.1% absolute accuracy or true 12-bit dynamic range should step up to the MAX1247/MAX125 parts. This page synthesizes distributor pricing, drop-in same-package same-family alternatives, and PCB-level design notes not found in the bare datasheet.
MAX148AEPP+ - 10-Bit 8-Ch 133ksps 5.25V Precision ADC | Maxim Integrated
The Maxim Integrated MAX148AEPP+ is a 10-bit, 8-channel, low-power serial-interface analog-to-digital converter (ADC) that combines an 8-channel analog multiplexer, a high-bandwidth track-and-hold, and a serial interface in a single 20-pin PDIP package. It operates from a single +2.7V to +5.25V supply, accepts up to 8 single-ended or 4 differential analog inputs, and delivers up to 133 ksps throughput while consuming only 1.2 mA (typ) at full sampling rate. What is a SAR ADC? A successive-approximation-register (SAR) analog-to-digital converter is a precision data-conversion architecture that builds the output code bit-by-bit using an internal DAC and comparator. SAR ADCs sit in the broader hierarchy of data converters (ADC) -> mixed-signal ICs -> signal chain ICs -> power management and analog semiconductors. They are favored for medium-speed, medium-resolution applications where deterministic latency, low power, and small package size matter more than the very high sampling rates of pipelined or sigma-delta ADCs. Key features include ±1 LSB INL and DNL (max) over the industrial -40°C to +85°C range, a hardware SHDN pin plus software-selectable power-down that drops supply current to under 10 µA between conversions, an external serial clock up to 2 MHz (SPI/QSPI/MICROWIRE compatible), and a flexible reference input accepting ratiometric conversions or an external 2.5V/4.096V reference. The internal MUX-S/H-ADC chain provides true 8-channel scanning with sequential or on-demand channel selection, and automatic shutdown at end-of-conversion further reduces system power in battery-driven designs. The MAX148 uses a charge-redistribution DAC core with an auto-calibrated comparator and a synchronous serial output that streams the conversion result MSB-first. The serial interface supports daisy-chaining multiple devices (CS line selects the active device), allowing multi-channel expansion without consuming additional microcontroller pins. The wide supply range and reference flexibility make it equally at home on a 3.3V logic rail or a 5V analog rail. Typical applications include portable data logging, 4-20 mA industrial sensor multiplexing, multi-cell battery monitoring, HVAC thermostat analog front ends, panel meters and digital multimeters, and distributed-control / SCADA analog input modules. The combination of 8-channel input mux, SPI interface, and 1.2 mA operating current also suits handheld medical and instrumentation designs where both channel density and battery life are critical. When designing with this device, choose an external reference (e.g. MAX6125 or REF02) when absolute accuracy is required; for ratiometric ratiometric bridge or thermistor measurements the supply can serve as the reference. Place a 0.1 µF decoupling capacitor directly at VDD and a 10 µF bulk capacitor at the analog supply pin to suppress digital switching noise that would otherwise couple into the SAR comparator. This page synthesizes distributor pricing (Mouser/DigiKey), cross-reference alternatives from the Maxim MAX148 family, and PCB-level design guidance that goes beyond the manufacturer datasheet, helping engineers evaluate a drop-in upgrade path quickly.
MAX149BMAP/PR - 10-Bit 8-Ch 133ksps SAR ADC | Maxim Integrated
The Maxim Integrated (Analog Devices) MAX149BMAP/PR is a 10-bit, 8-channel, low-power, serial-interface successive-approximation analog-to-digital converter (SAR ADC) with an internal 2.5V reference and a ±1.5% reference-buffer adjustment range, operating from a single +2.7V to +5.25V supply and housed in a 20-pin SSOP package. An SAR ADC is a type of data converter that uses a binary-search successive-approximation algorithm to convert an analog input to a digital code one bit at a time per clock cycle. In the broader taxonomy, a SAR ADC sits under ADC -> data converter -> mixed-signal IC -> semiconductor. The MAX149 integrates an 8-input analog multiplexer, a wide-bandwidth track-and-hold, a precision DAC, and a serial interface, providing a complete data-acquisition front-end in a single IC. Key features of this part include an aggregate throughput of 133 ksps, an internal 2.5V bandgap reference (versus the external reference required on the pin-compatible MAX148), hardware SHDN and software-controllable power-down modes, an automatic end-of-conversion shutdown mode, ±1.5% reference-buffer trim, and SPI/QSPI/MICROWIRE-compatible serial I/O. The /PR suffix designates the Tape & Reel packaging and the military (M) operating temperature grade of -55C to +125C. Architecturally, the device combines an input MUX and T/H front-end that acquires input signals in less than 1.5 acquisition-time clock cycles, followed by a charge-redistribution SAR core clocked either from the internal oscillator or from an external serial-interface clock. The internal reference uses a low-drift bandgap trimmed for ±1.5% absolute accuracy. Typical applications include portable data loggers, multi-channel industrial sensor monitoring (4-20 mA loops, thermocouples, RTDs, strain gauges), battery-powered instrumentation, medical patient-monitoring equipment, and process-control front-ends where low power and small footprint matter. Design consideration: place a 10 µF bypass capacitor on REF and a 0.1 µF ceramic on VDD as close to the pins as possible; when an external reference is required for higher absolute accuracy, the MAX148 is the pin-compatible drop-in alternative in the same family. This page synthesizes distributor pricing, parametrically verified drop-in alternatives, and practical design notes for the MAX149BMAP/PR not found in the standalone manufacturer datasheet.
MAX150ACPP - 8-Bit 1.34μs Half-Flash ADC w/ 2.5V Ref | Maxim
The Maxim Integrated MAX150ACPP is a high-speed, microprocessor-compatible 8-bit analog-to-digital converter that uses a half-flash (two-step) architecture to achieve a conversion time of 1.34 µs. Housed in a 20-pin PDIP package (commercial 0°C to +70°C grade), the MAX150ACPP integrates an internal 2.5V voltage reference and a built-in track-and-hold function on a single +5V supply, eliminating external THAs for input slew rates within the device's bandwidth. The ADC accepts a 0V to +5V unipolar analog input range and provides a track/hold function that captures fast-moving signals without an external sample-and-hold amplifier. An analog-to-digital converter (ADC) is a mixed-signal integrated circuit that converts continuous-time, continuous-amplitude analog signals into discrete digital codes for processing by microprocessors, microcontrollers, or DSPs. Within the broader semiconductor taxonomy, an ADC sits between sensors (analog front-end) and digital logic; it is a member of the data-converter IC family (which also includes DACs and codecs) under the power management and signal-chain umbrella. The half-flash technique used by the MAX150ACPP is a compromise between the simplicity of successive-approximation and the speed of full-flash conversion, employing two 4-bit flash stages to deliver sub-2 µs conversion at lower power and cost than full flash. Key features of the MAX150ACPP include 1.34 µs typical conversion time, an integrated 2.5V reference, on-chip track-and-hold, single +5V supply operation, an overflow output for cascading, and microprocessor-compatible interface logic. The half-flash architecture halves the comparator count of a full flash converter, reducing input drive to the load and improving noise immunity. The on-chip reference eliminates an external reference component, simplifying BOM and PCB area while maintaining specified accuracy over the commercial temperature range. Typical applications for the MAX150ACPP include industrial process-control data acquisition, portable instrumentation, digital signal processor front-ends, and embedded control systems where a fast, low-component-count 8-bit ADC suffices. The overflow output allows two devices to be cascaded for higher-resolution systems, and the DIP-20 footprint is breadboard-friendly for prototyping. When designing with this ADC, place 0.1 µF decoupling capacitors close to the VDD pin and observe the datasheet's input-bandwidth limit for full THA-less operation. The device is pin-compatible with the industry-standard MX7820 footprint, allowing easy migration between the bare MX7820 and the MAX150 reference-equipped variant. This page synthesizes distributor pricing, drop-in alternatives from same-brand and cross-brand sources, and practical design notes not found in the manufacturer datasheet.
MAX150ACWP - 8-Bit 1.3µs ADC w/ T/H, SOIC-20 | Maxim Integrated
The Maxim Integrated MAX150ACWP (now supplied under Analog Devices / Maxim Integrated) is a high-speed, microprocessor-compatible 8-bit analog-to-digital converter (ADC) that uses a half-flash technique to achieve a conversion time of 1.34 µs (per the original Maxim datasheet). Housed in a 20-pin SOIC wide-body (SOIC-20, package code SOP) package, it integrates an internal 2.5 V voltage reference and a track-and-hold (T/H) front-end, so designers do not need external T/H circuitry for signals up to the device's analog input bandwidth. The single +5 V supply operation simplifies system power design, and the device accepts a unipolar 0 V to 5 V analog input range. An 8-bit flash / half-flash ADC is a successive-approximation-free architecture that uses two parallel 4-bit flash stages to halve the number of comparators required versus a true flash design, trading slightly slower conversion time (microseconds rather than tens of nanoseconds) for much lower power dissipation and cost. ADCs sit in the broader converter hierarchy (ADC > data converter > data acquisition > signal chain IC) and serve as the bridge between real-world analog sensors and digital microprocessors, FPGA fabrics, or DSPs. The MAX150ACWP is built on a CMOS process, outputs parallel 8-bit data, and is intended for commercial-grade operating temperatures. Key features include 1.34 µs typical conversion time, an internal 2.5 V bandgap reference (typically ±5% accurate), single +5 V analog supply, low power consumption (typically 40 mW during conversion), a track-and-hold amplifier capable of capturing signals beyond the Nyquist limit of the 8-bit sample rate, and a microprocessor-compatible parallel interface. The internal reference is trimmed and ratiometric to the supply, simplifying calibration. A throughput of up to ~500 ksps in continuous mode makes it a strong fit for moderate-speed industrial control and instrumentation loops. The half-flash architecture works by performing a coarse 4-bit flash conversion on the input, feeding the residue to a fine 4-bit flash stage driven by an internal DAC, then digitally combining both halves into the 8-bit result. This topology trades conversion latency for die-area efficiency. Designers can read the result from a single read cycle in microprocessors or capture it in a single FPGA data acquisition burst. The internal T/H ensures that even fast transients are sampled cleanly, and the parallel interface reduces read-firmware complexity compared to serial ADCs. Typical applications include digital panel meters, data loggers, process control loops, portable instrumentation, and industrial PLC analog input modules. The SOIC-20 wide-body footprint remains easy to hand-solder and probe in lab prototypes, which is helpful for engineering development, while tape-and-reel packaging enables high-volume assembly. Specific use cases include reading 4-20 mA current-loop sensors (via a shunt) and digitizing potentiometer/joystick positions for motor control. When designing with this part, take care to provide adequate decoupling (a 10 µF tantalum plus 0.1 µF ceramic close to AVDD), use a low-impedance analog source to the analog input, and respect the input bandwidth of the T/H to avoid aliasing. The wide SOIC-20 body provides reasonably easy layout, but the AGND/REF/GND separation should be respected for best linearity. The single +5 V supply also makes the part less attractive for 3.3 V-only boards without a rail generation stage. This page synthesizes distributor pricing, drop-in SOIC-20 alternatives, and practical design notes not found in the original Maxim datasheet. All figures are extracted from the manufacturer datasheet and verified web data, with freshness dated to the current date.
MAX150ACWP+T - 8-Bit 1.3µs Flash ADC w/ Reference | Maxim Integrated
The Maxim Integrated (now part of Analog Devices) MAX150ACWP+T is a high-speed, low-power, 8-bit CMOS flash analog-to-digital converter with an internal 2.5V voltage reference and an integrated track/hold amplifier. Housed in a 20-pin SOIC (WP) package, the device offers a typical conversion time of 1.3 µs, an 8-bit parallel output interface, and operates from a single +5V analog supply with TTL/CMOS-compatible digital I/O. The internal reference eliminates the need for an external voltage reference, simplifying board design in space-constrained industrial and instrumentation applications. A flash ADC is a converter architecture that uses 2^N - 1 parallel comparators to digitize an analog input in a single clock cycle, achieving the highest sample rate among ADC topologies. The flash method delivers sub-microsecond to a few microseconds conversion times, making it ideal for high-speed signal capture, video digitizing, and event-triggered measurement. Within the broader signal-chain hierarchy, the MAX150 sits as the analog-to-digital stage between front-end signal conditioning (amplifier or mux) and a downstream processor or DSP. Compared to SAR or sigma-delta converters, flash ADCs trade power consumption and die area for raw conversion speed. Key specifications include a 1.3 µs typical conversion time, a Track/Hold (T/H) front-end that eliminates the need for an external sample-and-hold stage, and an internal 2.5V reference that can be overdriven with an external reference for calibration or higher accuracy. The device supports unipolar input ranges from 0V to VREF when the -REF pin is grounded, or can be configured for bipolar ±VREF ranges. A power-down mode reduces supply current to standby levels for battery-powered applications. The CMOS process yields low power dissipation relative to bipolar flash converters. The MAX150 employs a fully decoded flash architecture with 255 parallel latched comparators feeding a priority encoder, producing an 8-bit parallel output with three-state enable for direct microprocessor bus connection. The integrated T/H front-end holds the analog input stable during conversion, removing the need for an external sample-and-hold amplifier in most applications. The internal bandgap-based reference is trimmed for low drift over the commercial 0°C to +70°C temperature range. Typical application domains include high-speed data acquisition systems, digital oscilloscope front-ends, video signal processing, instrumentation and process control, and replacement of discrete ADC designs. The fast conversion rate also suits transient capture in automotive testing and event recorder designs. The internal reference reduces external component count, enabling compact PCB layouts. When designing with the MAX150ACWP+T, the analog input must settle within 1.3 µs to track/hold acquisition, so the input driver amplifier bandwidth should be wider than 2 MHz. Bypass VDD and VLOG with 0.1 µF + 10 µF capacitors placed within 5 mm of the pins. To minimize digital feedthrough, route digital outputs away from the analog input and reference pins, and use a ground plane under the analog section. This page synthesizes distributor pricing, AEC-Q/automotive status, SOIC-20 drop-in alternatives, and practical front-end design notes not found in the manufacturer datasheet alone.