ADC/DAC
Productos (2518)
MAX150AEPP+ - 8-Bit 1.34µs Half-Flash ADC with Reference | Maxim
The Maxim Integrated MAX150AEPP+ is a high-speed, microprocessor-compatible 8-bit analog-to-digital converter that uses a half-flash architecture to achieve a 1.34 µs conversion time. The device accepts a 0V to +5V analog input range while operating from a single +5V supply, and it is housed in a 20-pin plastic DIP package. What is an ADC? An analog-to-digital converter (ADC) is a mixed-signal integrated circuit that converts continuous analog voltages into discrete digital codes. Half-flash (also called subranging flash) ADCs split the conversion into two flash passes - a coarse pass that resolves the most significant bits and a fine pass that resolves the least significant bits - delivering flash-class speed at a fraction of the silicon area and power. ADCs sit within the broader hierarchy of data converters (ADC/DAC) -> mixed-signal ICs -> integrated circuits -> semiconductors. Key features of the MAX150AEPP+ include an integrated 2.5V precision bandgap reference, an on-chip track-and-hold capable of capturing input signals with slew rates up to [DATA_NEEDED: input slew rate limit], and a microprocessor-compatible parallel interface with read/write control lines. The device draws a typical [DATA_NEEDED: supply current] mA from the +5V rail and offers three-state output latches for direct bus connection. Architecturally, the converter uses two 4-bit flash stages plus a DAC-based error subtractor to deliver 8-bit resolution in a single 1.34 µs conversion cycle. The integrated track-and-hold eliminates the need for an external sample-and-hold amplifier in most measurement scenarios. The internal reference is trimmed to ±[DATA_NEEDED] % accuracy and can be bypassed or used to drive external circuitry. Typical applications include data acquisition front ends, digital panel meters, process-control analog input boards, and audio digitizing where the 0-5V unipolar input matches common sensor and transducer output ranges. The half-flash architecture makes this ADC especially attractive when designers need flash-class speed without the power and cost penalty of a true flash converter. When designing with this part, ensure that the analog input source can drive the device's input capacitance within the acquisition window, and add a 100 nF decoupling capacitor close to the VDD pin. The CS and RD inputs allow direct connection to most 8-bit microcontrollers without external glue logic. For high-noise environments, place the MAX150AEPP+ away from switching converters and route analog and digital grounds in a star pattern back to the regulator. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone.
MAX150AEWP+ - 8-Bit 1.3µs Half-Flash ADC w/ Reference | Maxim
The Maxim Integrated (now Analog Devices) MAX150AEWP+ is a high-speed, microprocessor-compatible 8-bit analog-to-digital converter that uses a half-flash (two-step flash) architecture to achieve a conversion time of 1.34 µs (typical), delivered in a 20-pin SO package (SOIC-20). Key headline parameters include 8-bit resolution, 1.3 µs typical conversion time, on-chip +2.5 V voltage reference, on-chip track/hold, and single +5 V analog supply operation with TTL-compatible digital I/O. An 8-bit ADC (analog-to-digital converter) is a mixed-signal integrated circuit that quantizes an analog input voltage into one of 256 discrete digital codes. Half-flash (or two-step flash) ADCs use two parallel 4-bit flash stages and a digital error-correction DAC to halve the comparator count of a true flash ADC while preserving sub-microsecond conversion speeds - a classic speed/cost trade-off used by Maxim's MAX150/MX7820 family and similar parts from competitors. ADCs sit in the signal chain hierarchy: analog front end -> ADC -> digital processor/microcontroller, and are essential whenever a sensor, transducer, or audio/video signal must be digitized for embedded processing. Differentiating specifications include the integrated track-and-hold amplifier that eliminates the need for an external SHA, a built-in 2.5 V bandgap reference (stable enough for 8-bit accuracy without external buffering), and a ratiometric input range that can accept 0V to +5V unipolar signals when using the internal reference. The device provides a latching three-state output bus that interfaces directly to 8080/6800-style microprocessor buses without glue logic, simplifying microcontroller-based data-acquisition designs. The MAX150/MX7820 architecture combines two 4-bit flash converter arrays with a 4-bit DAC for residue generation, then performs a second 4-bit flash conversion to assemble the final 8-bit code in two clock cycles. The on-chip track/hold uses a charge-compensation technique rather than a traditional SHA capacitor, which gives the part its wide input bandwidth despite the moderate sampling rate. The internal reference is a buried Zener bandgap trimmed at wafer level, providing ±1 LSB typical initial accuracy at 25 °C. Typical applications include digital panel meters, portable instrumentation, waveform digitizers in oscilloscope front ends, audio spectrum analyzer front ends, process-control analog input modules, and any embedded system needing fast 8-bit acquisition with minimal external components. Designers choose this part when they need 8-bit resolution at higher throughput than successive-approximation ADCs but do not need 10/12/14-bit precision. A key design tip: the input pin presents a relatively low source-impedance requirement because the internal track/hold is not a traditional switched-capacitor SHA. Add a 100 Ω series resistor plus a 100 pF capacitor on AIN to limit transient kickback when switching the input mux - this is standard Maxim app-note guidance. The digital outputs swing full TTL levels and can drive a few LS-TTL loads directly. This page consolidates distributor stock data, half-flash architecture context, drop-in alternatives, and practical design notes that go beyond the manufacturer datasheet's typical-application schematic to help engineers select and implement the MAX150AEWP+ with confidence.
MAX150AEWP+T - 8-Bit 500ns Flash ADC with T/H | Maxim Integrated
The Maxim Integrated MAX150AEWP+T is a high-speed, 8-bit analog-to-digital converter (ADC) with a built-in track-and-hold amplifier and an internal 2.5V reference, housed in a 20-pin wide-body SOIC (EWP) package. The device uses a half-flash (two-step) architecture to achieve a conversion time of approximately 1.34 microseconds (per the underlying MAX150/MX7820 family datasheet), supporting up to ~500 ksamples/s sample rates while drawing a typical 35 mW from a single +5V analog and +5V digital supply. An 8-bit flash ADC is a data-conversion IC that translates an analog input voltage into a parallel 8-bit digital output code on each conversion. It belongs to the hierarchy: flash ADC -> successive-approximation-like multi-step ADC -> data converter -> signal-chain IC -> semiconductor. Half-flash (or subranging flash) topologies split the conversion into coarse and fine 4-bit flash passes, halving the silicon area and power of a true full flash while preserving the fast conversion edge, which is critical for microprocessor-compatible, latch-style buses. Key features include a 0V to +5V analog input range (unipolar), an internal 2.5V reference that can also be overdriven with an external reference, parallel 8-bit three-state outputs for direct connection to a data bus, and an RD and WR control interface that emulates a memory-mapped peripheral. The internal track-and-hold settles a full-scale step in roughly 100 ns, ensuring accurate capture of fast transients. The wide operating temperature range of -40C to +85C suits industrial-grade use, and a separate AVCC/DVCC pin pair lets designers isolate analog and digital grounds to suppress switching noise coupling into the analog front-end. Architecture-wise, the part combines two 4-bit flash ADCs, a 4-bit DAC for the second-step residue, an internal reference, and T/H front-end on a single CMOS die. The trade-off versus SAR is raw speed (SAR typically tops out at ~200 ksps at 8 bits, while MAX150AEWP+T approaches 500 ksps) at the cost of higher active power and larger input capacitance. Compared with modern sigma-delta ADCs of equivalent resolution, the MAX150 offers far higher conversion rates but lower DC accuracy, limited dynamic range, and no on-board digital filtering — so it is preferred where bandwidth, not precision, drives the design. Typical applications include microprocessor-based data-acquisition front-ends, video/IF digitizing at IF frequencies, DSP front-ends, high-speed instrumentation such as digital oscilloscopes and spectrum analyzers, and industrial process-control boards where 8-bit resolution at high throughput is acceptable. Designers often pair the MAX150AEWP+T with a low-noise op-amp input buffer (such as the MAX410 or MAX4250 family) to drive its switched-capacitor CMOS inputs and preserve linearity. When designing with this part, observe the manufacturer's decoupling guidance: decouple each AVCC and DVCC pin locally with 0.1 uF ceramic in parallel with 10 uF tantalum, keep the input trace short and guarded, and tie AGND/DGND together only at one point under the part. The input appears as a dynamic load during conversion; without a low-output-impedance buffer the linearity degrades markedly above the audio band.
MAX150BEPP - 8-Bit 1.3µs ADC with Reference, DIP-20 | Maxim
The Maxim Integrated MAX150BEPP (and its + RoHS counterpart MAX150BEPP+) is a monolithic CMOS 8-bit analog-to-digital converter with an integrated 2.5V precision bandgap voltage reference and a wide-bandwidth track-and-hold input stage, housed in a 20-pin plastic DIP package. Its headline specifications are 8-bit resolution, 1 input channel, a flash (half-flash) conversion architecture, a 1.3 µs typical conversion time, and a single +5V analog supply plus a digital supply that can be powered from the analog rail. An ADC (Analog-to-Digital Converter) is a data-conversion semiconductor that samples a continuous analog voltage and produces a discrete digital code, enabling microcontrollers, DSPs, or FPGAs to process real-world signals. The MAX150BEPP occupies the hierarchy of successive-approximation and flash mid-speed converters used in instrumentation, motor control, and process-control systems where sub-2 µs throughput and 8-bit (0.4% FSR) accuracy are sufficient. Key features include ±1 LSB INL and DNL, an internal 2.5 V reference with ±0.5% accuracy, a track-and-hold bandwidth that supports signals well above the Nyquist frequency for full-scale sine inputs, a power-down mode that drops quiescent current to typical low-microamp levels, and 8 three-state digital outputs that share the same bus as the host microprocessor. The internal reference eliminates the external reference-and-buffer network often required by older flash ADCs, simplifying BOM cost and reducing PCB area on legacy through-hole designs. Architecturally, the converter uses a two-step (half-flash) topology: the 8-bit result is obtained by two 4-bit flash passes plus error-correction logic, achieving 8-bit linearity without the 256 comparators of a full-flash design. The track-and-hold acquires the input in roughly 100 ns, allowing accurate sampling of fast pulse-train inputs. Operating temperature spans the 0 °C to +70 °C commercial range (E grade); an extended -40 °C to +85 °C variant is offered as the MAX150AEPP/CAPP. Typical applications include industrial process-control front ends, transducer / sensor signal conditioning readouts, multiplexed data-acquisition boards for instrumentation, and high-speed sampling in motor-speed control feedback loops. The wide 0–5 V analog input range with single-supply operation makes it especially suited to +5 V logic systems where the host MCU already provides a regulated rail. When designing with this part, place a 0.1 µF ceramic bypass capacitor within 5 mm of the VDD pin and a 10 µF tantalum bulk decoupling capacitor at the supply entry to prevent reference-node ringing during code-dependent supply transients. The internal reference requires a minimum 4.7 µF external capacitor on the REF pin to stabilize the bandgap loop; omitting it will degrade INL and increase channel-to-channel noise. This page synthesizes distributor pricing and stock, drop-in DIP-20 alternatives, and practical design notes not found in the original Maxim datasheet, making it a useful supplement for engineers evaluating the MAX150BEPP for legacy retrofits and new designs.
MAX150BEWP+T - 8-Bit 500kSPS ADC w/ Ref & T/H | Maxim
The Maxim Integrated (now Analog Devices) MAX150BEWP+T is a CMOS, high-speed 8-bit analog-to-digital converter that uses a half-flash conversion architecture to deliver up to 500 kSPS throughput, packaged in a 20-pin SOIC with 7.50 mm body width. It integrates a precision 2.5 V bandgap reference and a track-and-hold front end on-chip, producing a complete data-acquisition channel in a single IC. The converter operates from a single +5 V analog supply and provides digital I/O that is TTL/CMOS compatible for direct connection to microprocessors and microcontrollers. An ADC (analog-to-digital converter) is a semiconductor that quantifies a continuous analog input voltage into discrete binary codes that a digital processor can read and act on. Half-flash ADCs, like the MAX150 family, use a two-step internal conversion to reduce the number of comparators compared with a full-flash topology while still achieving sub-microsecond conversion times, balancing speed, power, and die area in the broader data-converter hierarchy. Key features of this part include a maximum 1.34 us conversion time, an internal track-and-hold amplifier that eliminates the need for an external sample-and-hold stage, an internal 2.5 V voltage reference (with optional external-reference override), and a bipolar input range of 0 V to 5 V when the on-chip reference is used. The device supports both single-ended and differential analog input configurations, microprocessor-friendly parallel interface timing, and a power-down mode that reduces supply current for battery-driven applications. Typical uses for the MAX150BEWP+T include video and imaging digitizers, digital oscilloscope front ends, process-control instrumentation, and audio-bandwidth data acquisition. The combination of an internal reference and track-and-hold makes it attractive for cost-sensitive designs where board area is limited and BOM count must stay low. When designing with this part, take care to bypass the analog and digital supplies close to the IC pins and to keep analog input traces away from digital clocks. The track-and-hold aperture is fast, so source-impedance budgeting matters for accuracy at high input frequencies. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, helping engineers select, second-source, and qualify the MAX150BEWP+T for volume designs.
MAX152CAP+T - 8-Bit 400ksps 3V Precision ADC | Maxim Integrated
The Maxim Integrated MAX152CAP+T is an 8-bit, 400ksps analog-to-digital converter (ADC) with semi-flash architecture and parallel data interface, housed in a 20-pin SSOP package operating from a single +2.7V to +3.6V supply. The device delivers 1.8 microsecond conversion time, an internal track/hold circuit, and 300kHz full-power input bandwidth, making it well suited for high-speed low-voltage signal acquisition. Per the Maxim datasheet, the part consumes only 1.5 mA in operating mode and drops to 1 microamp in power-down mode for battery-friendly duty-cycled designs. An ADC (analog-to-digital converter) is a mixed-signal integrated circuit that converts a continuous analog input voltage into a discrete digital code, typically for processing, display, or transmission by a downstream digital controller. ADCs sit inside the data converter family of signal chain ICs, which also includes DACs (digital-to-analog converters) and codecs. ADCs are categorized by architecture - successive-approximation (SAR), pipeline, sigma-delta, and flash/semi-flash - each making different trade-offs between speed, resolution, and power. The MAX152's semi-flash (two-step flash) architecture is a cost-effective compromise that delivers flash-class speed at roughly half the comparator count of a true flash converter. Key features include 400ksps throughput, 8-bit parallel output, an internal 2.5V reference, single 3V supply operation, internal track/hold, 1uA power-down current, and 1.8 microsecond conversion time. The 20-pin SSOP package offers a small footprint for portable and space-constrained designs. The MAX152 also provides a power-up time of 900ns and supports both unipolar and bipolar input ranges. From a technical perspective, the semi-flash architecture uses two 4-bit flash ADCs in tandem with a DAC to achieve 8-bit resolution in two clock cycles. The internal track/hold eliminates the need for an external sample-and-hold amplifier in most applications. The parallel data interface simplifies connection to microprocessors, DSPs, and FPGAs without requiring serial protocol overhead. Typical applications include portable instrumentation, data logging, battery-powered measurement systems, process control front-ends, and digital signal processing front-ends. The wide input bandwidth (300kHz) makes the MAX152 useful for audio-bandwidth signal acquisition. When designing with the MAX152, ensure the input signal stays within the 0V to VREF range for unipolar operation, or use the bipolar input configuration for +/-VREF/2 ranges. Decouple VDD with a 0.1uF ceramic capacitor placed close to the IC. The reference bypass capacitor value directly affects noise performance - use the value recommended in the datasheet typical operating circuit. This page synthesizes distributor stock data, parametric cross-references, and practical design notes that go beyond what a bare datasheet provides.
MAX152CWP - 8-Bit 400ksps ADC | 20-SOIC | Maxim Integrated
The Maxim Integrated (Analog Devices) MAX152CWP is a +3V, 8-bit analog-to-digital converter (ADC) with 1µA power-down and 400ksps throughput, housed in a 20-pin SOIC wide-body (WP) package. The MAX152CWP uses a half-flash conversion architecture to achieve a 1.8µs conversion time while drawing only 1.5mA in operating mode, digitizing up to 400,000 samples per second across a single input channel with internal track-and-hold and full-power input bandwidth of 300kHz. What is an ADC? An analog-to-digital converter (ADC) is a semiconductor device that converts continuous analog voltage signals into discrete digital codes for processing by microprocessors and digital systems. ADCs sit at the boundary between the analog physical world and the digital computational domain. Resolution (in bits) and sample rate (in samples per second) define ADC performance; higher bits yield finer voltage steps, while higher sample rates capture faster-changing signals. Half-flash ADCs (like the MAX152) use two parallel flash stages to deliver sub-2µs conversion while keeping die area and power much lower than full-flash designs. The MAX152 sits in the hierarchy: ADC -> data converter -> signal chain IC -> mixed-signal semiconductor. Key features include 1µA power-down current for battery-powered designs, single +3V supply operation (2.7V to 3.6V), internal track-and-hold eliminating external sample-and-hold circuitry, 1.8µs conversion time, 900ns wake-up from power-down, 1.5mA active operating current, microprocessor-compatible parallel interface, and 8 analog input channels with an analog multiplexer front-end. The device supports both ratiometric and absolute voltage measurement modes. Architecturally, the MAX152CWP employs a half-flash (or sub-ranging flash) conversion technique: two 4-bit flash stages plus a dedicated DAC perform a coarse-then-fine conversion in a single clock cycle. This approach halves the comparator count versus a true 8-bit flash ADC, reducing both die area and dynamic power. The internal 2.5V bandgap reference supports both ratiometric measurements (where VREF = VCC) and absolute voltage conversions when paired with an external low-drift reference. Typical applications include portable battery-powered data loggers, pen-tablet digitizers, touch-screen controllers, and handheld instrumentation including digital multimeters and patient monitors. Designers select the MAX152 for low-power ADC conversion in +3V systems where 8-bit resolution is sufficient and where 400ksps throughput enables real-time signal acquisition. Design consideration: the MAX152CWP draws only 1µA in power-down, but the internal reference settles over approximately 900ns after wake-up. Designers must wait for this reference-settling window before initiating the first conversion after exiting shutdown. Connecting an external 2.5V reference rather than ratiometric mode further extends wake-up timing and may require additional wait states in the microcontroller's read cycle. This page synthesizes distributor pricing (DigiKey, Mouser, Octopart), pin-compatible drop-in alternatives verified against the same SOIC-20 footprint, application companion MPNs, and practical design notes — information not consolidated in the manufacturer datasheet.
MAX152EPP - 8-Bit 400ksps 3V ADC with 1µA Power-Down | Maxim
The Maxim Integrated MAX152EPP is a high-speed, 8-bit, microprocessor-compatible analog-to-digital converter (ADC) that uses a half-flash (semiflash) architecture to achieve a 1.8µs conversion time and 400 ksamples/s throughput. The device operates from a single +2.7V to +3.6V supply (or dual ±3V) and accepts unipolar or bipolar analog inputs, packaged in a 20-pin PDIP (EPP suffix). An ADC (analog-to-digital converter) is a semiconductor device that samples a continuous analog voltage and quantizes it into a discrete digital code. Half-flash ADCs use two flash sub-ADACs and a single sample-and-hold stage to deliver sub-2µs conversions at roughly half the die area and power of a true flash converter. In the power-management and signal-chain hierarchy, an ADC sits between the analog front end and a digital host (µP, DSP, FPGA), forming the data-acquisition core of instrumentation, data loggers, and process-control systems. Key specifications of the MAX152EPP include 400 ksps throughput, 1.8µs conversion time, 900ns power-up wake-up, an internal track-and-hold, 1.5 mA operating current, and 1µA power-down current that makes it ideal for battery-powered and portable applications. The on-chip PWD pin reduces quiescent draw to 1µA between conversions. Input bandwidth is 300 kHz full-power, and the device supports both unipolar (0 to VREF or 0 to VDD) and bipolar (-VDD to +VDD) input ranges using a single-ended or pseudo-differential input stage. The half-flash core uses 15 comparators (split between MSB and LSB sub-conversion cycles) and on-chip error correction that removes missing-code risk. The parallel digital interface is µP-friendly with CS, RD, and WR controls plus a high-impedance output state that allows bus sharing with other peripherals. The MAX152EPP is offered in commercial (0°C to +70°C) and extended (-40°C to +85°C) temperature grades. Typical applications include portable battery-powered instrumentation, pen digitizers, remote data-acquisition modules, process-control loops with 3.3V backplanes, and low-power embedded µP systems where the host samples the ADC only on demand and shuts it down between conversions to extend battery life. A key design tip is to issue a PWD-low-to-high wake-up at least 900ns before initiating a conversion; otherwise the first sample is degraded by incomplete settling of the internal reference ladder. This page synthesizes distributor pricing, drop-in alternatives and practical design notes for the MAX152EPP that go beyond the manufacturer datasheet.
MAX152EWP - 3V 8-Bit 400ksps ADC | Analog Devices | SOIC-20
The Analog Devices / Maxim Integrated MAX152EWP is a single-channel, 8-bit resolution analog-to-digital converter (ADC) with 400 ksps throughput, packaged in a 20-pin SOIC (0.295 inch / 7.50 mm width). It operates from a single +2.7V to +3.6V supply with 1.8 us conversion time, 900 ns power-up wake, internal track-and-hold, 300 kHz full-power bandwidth, and a low-power shutdown mode that drops supply current to 1 uA when idle. An ADC (analog-to-digital converter) is a mixed-signal integrated circuit that samples a continuous analog input voltage and produces a discrete binary code proportional to that voltage. ADCs sit in the broader signal-chain taxonomy of data acquisition ICs -> converters -> ADC/DAC -> interface ICs -> integrated circuits. They serve as the bridge between analog sensors (temperature, pressure, position, audio) and digital processors, with successive-approximation-register (SAR) ADCs like the MAX152 optimized for medium-speed, low-power applications where low latency and predictable acquisition are more important than raw resolution. Key features include 1.5 mA operating supply current (dropping to 1 uA in power-down), internal 2.5V reference, parallel data interface, single-ended analog input with track/hold, and -40C to +85C industrial operating temperature. The 20-pin SOIC footprint supports both surface-mount and through-hole-compatible land patterns, simplifying prototyping and assembly for low-volume and legacy designs. The MAX152EWP uses a successive-approximation-register (SAR) architecture with an internal capacitive DAC, providing deterministic latency (one conversion = one clock cycle at the chosen throughput) and excellent DC accuracy. Internal calibration of the reference and input sampling network allows the device to deliver rated performance without external precision components, reducing BOM cost and PCB area. Typical applications include portable battery-powered data loggers, handheld multimeters and test equipment, industrial process sensors, medical monitoring subsystems, and low-bandwidth audio or voice-band front ends. Designers value its 1 uA shutdown current for battery life and its parallel output for direct connection to microcontrollers and DSPs. A key design consideration is that the MAX152EWP (no '+' suffix) is RoHS non-compliant; for new designs where RoHS compliance is mandatory, prefer the MAX152EWP+ or MAX152EWP+T variants which share identical electrical performance and pinout but use lead-free finishes. The MAX152EWP datasheet does not include output stage ESD ratings beyond HBM 2 kV per JEDEC JS-001, so additional external protection may be required for harsh industrial environments. This page synthesizes distributor pricing from DigiKey/Mouser/Octopart, drop-in same-brand alternatives in the same SOIC-20 footprint, and practical SAR-ADC design notes not found in the manufacturer datasheet alone.
MAX153CPP+CGP - 1Msps 8-Bit µP-Compatible ADC | Analog Devices
The Analog Devices MAX153CPP+CGP is a high-speed, microprocessor (µP)-compatible, 8-bit analog-to-digital converter (ADC) using a half-flash architecture to deliver a 660 ns conversion time and digitize at 1 megasample per second (Msps), housed in a 20-pin PDIP through-hole package. Key headline parameters include 8-bit resolution, 1 Msps sampling rate, and 1 µA typical power-down current, with single +5V or dual ±5V analog supply operation. An ADC (analog-to-digital converter) is a data converter IC that translates continuous analog signals into discrete digital codes for processing by microprocessors, microcontrollers, or DSPs. The MAX153 belongs to the successive-approximation/half-flash ADC family, which sits in the broader hierarchy of data converters alongside SAR (successive-approximation register), flash, sigma-delta, and pipeline architectures. Half-flash converters use two flash stages to halve the comparator count versus true flash, achieving sub-microsecond conversion at moderate die size—ideal for µP-interfaced data acquisition. Key features include a track/hold amplifier on-chip, unipolar or bipolar input ranges, a dedicated RD/WR strobe that maps directly onto 8086-style µP bus cycles, and a logic-level POWERDN pin that drops supply current to 1 µA for battery-powered designs. The half-flash core achieves ±1 LSB linearity (typical) and ±0.5 LSB INL, while the wide-aperture track/hold supports full-scale step inputs without dynamic distortion. Internal reference options and a simple two-wire read/write handshake simplify host integration. The MAX153 is typically deployed in data-acquisition front-ends, process-control PLC analog input modules, instrumentation and panel meters, portable battery-powered sensors, and digital oscilloscope or spectrum-analyzer auxiliary channels. The 1 Msps rate, low power-down current, and µP bus interface make it well suited to embedded industrial designs where host CPU cycles must be minimized. Designers should provide solid analog and digital ground separation, place the 2.2 µF reference bypass capacitor close to REF, and ensure the read strobe timing meets the 660 ns conversion budget. For multi-channel systems, an external MUX can be placed in front of the single analog input with the ADC's conversion latency absorbed by the host between samples. This page synthesizes distributor pricing from DigiKey, Mouser, Octopart, and Jotrin, drop-in same-package alternatives, and practical design notes that are not aggregated on the manufacturer datasheet alone.
MAX153EAP - 1Msps 8-Bit ADC, 1µA Power-Down, 20-SSOP | Maxim
The Maxim Integrated MAX153EAP (now part of Analog Devices Inc.) is a 1Msps, microprocessor-compatible, 8-bit analog-to-digital converter with 1µA power-down current, housed in a 20-pin SSOP package. It features a single-ended input channel, half-flash (flash) architecture, parallel data output interface, and an external reference, making it well suited to high-speed, low-power data acquisition in portable and industrial designs. An ADC (Analog-to-Digital Converter) is a mixed-signal integrated circuit that converts a continuous-time analog voltage into a discrete-time digital code. Half-flash (also called subranging) ADCs use two parallel flash stages of fewer comparators to achieve higher conversion rates than successive-approximation ADCs of similar cost, while maintaining modest die area and power consumption. The MAX153EAP belongs to the SAR/half-flash ADC product category within the broader data converter IC hierarchy, which sits under signal conditioning and data acquisition in the mixed-signal semiconductor tree. Key specifications include 1Msps minimum sampling rate, 8-bit resolution, single 5V analog supply (per the original Maxim datasheet), and an ultra-low 1µA power-down current that enables battery-powered applications to wake, sample a single waveform, and return to sleep between conversions. The half-flash converter delivers 8-bit throughput in a single acquisition with no missing codes, while an external reference allows the user to optimize full-scale range and noise performance for the transducer in use. Typical applications include portable instrumentation, pen-digitizers and touch controllers, remote data loggers, and embedded process control front-ends where a fast 8-bit ADC with a 1µA sleep current extends battery life. The MAX153EAP is widely used as a drop-in upgrade for systems that previously depended on AD7574, AD670, or first-generation AD converter designs requiring higher throughput. When designing with this device, place the 20-SSOP exposed-pad footprint on a board with a solid ground plane and keep analog/digital traces short; bypass VDD with a 0.1µF ceramic capacitor close to the pin. The CS, RD, and INT outputs form a transparent microprocessor-style interface, so the host can poll, interrupt, or strobe conversions without complex configuration. This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes not found in the manufacturer datasheet alone, helping procurement and design engineers evaluate the MAX153EAP against modern 8-bit ADC options.
MAX153EAP+ - 1Msps 8-Bit ADC | Maxim Integrated | SSOP-20
The Analog Devices (formerly Maxim Integrated) MAX153EAP+ is a high-speed, microprocessor-compatible, 8-bit analog-to-digital converter (ADC) that uses a half-flash technique to achieve a 660 ns conversion time and digitizes at a rate of 1 Msps. Housed in a 20-pin SSOP package, the part operates from a single +5 V supply or dual ±5 V supplies and accepts either unipolar or bipolar analog inputs. An ADC (analog-to-digital converter) is a data-conversion integrated circuit that samples a continuous analog voltage and quantizes it into a discrete digital code. The half-flash architecture used in the MAX153 family combines two flash sections to deliver high throughput at moderate cost compared with full-flash devices. Within the broader taxonomy, the MAX153 sits between successive-approximation and full-flash ADCs as a speed-optimized converter for embedded data-acquisition and instrumentation systems. Key features include 1 Msps sampling, 660 ns conversion time, parallel microprocessor-compatible interface, and a dedicated POWERDN pin that reduces supply current to 1 µA between conversions. The 8-bit resolution provides 1 LSB of approximately 19.5 mV over a 0-5 V unipolar input range. Input range selection between unipolar and bipolar modes, plus an external reference input, make the device flexible for single-ended or differential signal acquisition. Operating temperature range is -40 °C to +85 °C for the E-suffix industrial grade. The MAX153 integrates an input track-and-hold, two 4-bit flash ADCs with 1-bit overlap, an error-correction latch, and a state-machine control logic, accessed through a parallel data bus with standard CS and RD strobe inputs. The half-flash topology halves the comparator count versus a full 8-bit flash, reducing die area and input capacitance while still supporting 1 Msps throughput. Typical applications include digital signal processing front-ends, high-speed data acquisition cards, PC plug-in boards, portable instrumentation, and process-control monitoring where a parallel-output ADC simplifies interface to microprocessors and DSPs. The 1 µA power-down mode also suits battery-powered measurement equipment. When designing with the MAX153EAP+, place 0.1 µF bypass capacitors adjacent to the supply pins and observe the analog/digital ground split recommended in the manufacturer datasheet to preserve dynamic performance at full throughput.
MAX153EAP+T - 8-Bit 1Msps ADC | Maxim Integrated | SSOP-20
The Analog Devices / Maxim Integrated MAX153EAP+T is a high-speed, microprocessor-compatible, 8-bit analog-to-digital converter that uses a half-flash architecture to achieve 660 ns conversion time and a 1 Msps sampling rate. Housed in a 20-pin SSOP package, it accepts either single +5 V or dual ±5 V analog supplies, with unipolar or bipolar input ranges, and includes a POWERDN pin that drops current consumption to a few microamps during idle periods. The half-flash architecture uses two parallel 4-bit flash converters and an internal 2-bit DAC to digitize the input, achieving an 8-bit result in two passes, balancing speed and die size. An analog-to-digital converter (ADC) translates continuous analog signals into discrete digital codes for processing by microcontrollers, DSPs, or FPGAs. The MAX153 belongs to the successive-approximation and flash ADC family hierarchy, using a half-flash technique that approximates true flash conversion at roughly one third of the die area. Within the broader data converter taxonomy, an ADC such as the MAX153EAP+T is a precision mixed-signal component that bridges analog sensors and digital systems, often feeding digital signal processors, microcontrollers, or instrumentation recording paths. Key features include 8-bit resolution, 1 Msps minimum sampling rate, an external-reference interface, microprocessor-compatible parallel interface (mode 0), and a low shutdown current of approximately 1 µA. The half-flash core achieves a 660 ns conversion time without the power and silicon area penalty of a true 8-bit flash converter. The device supports both AC-specified (1 Msps) and guaranteed-by-design extended-temperature operation, and offers a simple CS-RD write-control interface for direct connection to most microcontrollers. The device operates from a single +5 V supply or dual ±5 V supplies and offers 0 V to +5 V unipolar or ±5 V bipolar analog input ranges. The shutdown mode is engaged by forcing the POWERDN pin LOW, drawing only 1 µA typical, suiting battery-powered data acquisition. Built-in track-and-hold and an external-reference input provide design flexibility for applications needing temperature-compensated or precision references. Typical applications include high-speed digital signal processing, servo control loops, portable or battery-powered data acquisition systems, and communication systems. Industrial grade temperature range covers -40°C to +85°C, while the SSOP-20 footprint simplifies layout in compact designs and is compatible with standard surface-mount assembly lines. Designers should pay attention to the analog and digital supply pins, which must be properly bypassed with 10 µF electrolytic and 0.1 µF ceramic capacitors as close to the pins as possible to achieve the rated SNR. The reference pin requires a low-impedance source such as the MAX152 or a low-noise precision reference to maintain linearity; using a noisy reference will degrade SNR but not necessarily increase INL at 8 bits. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found on the manufacturer datasheet alone.
MAX153EAP-T - 8-Bit 1Msps ADC with 1µA Power-Down | Maxim Integrated
The Maxim Integrated MAX153EAP-T is an 8-bit analog-to-digital converter featuring a 1 Msps sampling rate, half-flash architecture, and a 1 µA power-down mode, housed in a 20-pin SSOP package. It operates from a single +5V analog supply and a +5V digital supply, providing a parallel microprocessor-compatible interface with three-state outputs. The part is offered in tape-and-reel packaging to support high-volume SMT assembly lines. What is an SAR/half-flash ADC? A half-flash (or sub-ranging flash) ADC is a type of analog-to-digital converter that uses two flash stages and a DAC to achieve moderate resolution (in this case 8 bits) at much higher speed and lower power than a full-flash converter. Within the data converter hierarchy, an 8-bit half-flash ADC sits between a parallel flash ADC (fastest, lowest resolution, highest power) and a successive-approximation-register (SAR) ADC (lower power, slowest). Half-flash parts are commonly used as μP-compatible data acquisition front ends where a single +5V supply simplifies board design. Key features include a 1 Msps minimum sampling rate, single +5V operation with an internal 2.5V reference, a track/hold amplifier on the analog input, and an automatic power-down mode that drops quiescent current to 1 µA between conversions. The parallel interface exposes eight data outputs (D0–D7), a high-Z output enable (OE), a read strobe (RD), and a convert start (CONVST) input, enabling direct connection to 8-bit microcontrollers and DSPs without glue logic. The MAX153EAP-T employs an on-chip track-and-hold that relaxes the input bandwidth requirement and preserves signal integrity at full speed. An external reference can replace the internal 2.5V reference for applications requiring tighter absolute accuracy or ratiometric measurements; reference voltage directly scales the input full-scale range. Typical applications include data acquisition systems, portable instrumentation, battery-powered metering, digital oscilloscope front-end digitizers, and process-control I/O cards. Compared with a full-flash ADC the half-flash approach halves the comparator count, materially reducing power consumption and die area. When designing with this device, observe the +5V supply tolerance (typically ±5%) and respect the analog-to-digital setup/hold times listed in the manufacturer datasheet to avoid linearity errors. For battery-powered designs, leverage the 1 µA power-down mode by gating the CONVST signal so the ADC spends most of its time in shutdown. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet, helping engineers compare the part against pin-compatible Maxim Integrated family members and competitor equivalents.
MAX154AEWG - 8-Bit 4Ch 2.5us ADC w/ Reference | Maxim Integrated
The Maxim Integrated (now Analog Devices) MAX154AEWG is a CMOS high-speed 8-bit analog-to-digital converter (ADC) with four analog input channels, an internal 2.5V reference, and track/hold, housed in a 24-pin wide-body SOIC (SO-24W) package. It delivers a 2.5 us conversion time per channel using a successive-approximation register (SAR) architecture, with the MAX154AEWG/A grade rated for -40 C to +85 C industrial operation. An analog-to-digital converter (ADC) is a mixed-signal integrated circuit that samples a continuous analog voltage and converts it into a discrete digital code, typically N-bit binary. SAR ADCs use a binary-search successive-approximation algorithm with an internal DAC and comparator, achieving an excellent balance of speed, resolution, and power consumption for data acquisition, instrumentation, and process-control applications. The MAX154 family sits in the hierarchy: SAR ADC -> ADC -> data converter -> mixed-signal IC -> semiconductor. Key features include four single-ended analog inputs (the pin-compatible MAX158 offers eight), a 2.5V internal bandgap reference (5 V external reference also accepted), ratiometric operation, and an on-chip track/hold. The MAX154AEWG provides 1/2 LSB integral nonlinearity and ±1 LSB total unadjusted error, with low-power CMOS design drawing only a few mW during continuous conversion. The MAX154AEWG uses a standard SAR architecture with internal clock generation, allowing simple microprocessor interface through standard CS, RD, and WR control lines. It connects directly to most 8-bit parallel buses without external glue logic. The wide input voltage range (single +5 V supply) and ratiometric capability make it suitable for both absolute and proportional measurements. Typical applications include data acquisition systems, process control, digital signal processing front-ends, multiplexed sensor monitoring, and portable instruments. The four-channel input makes it ideal for low-channel-count multi-signal monitoring without an external MUX. When designing with this device, observe the recommended 0.1 uF decoupling capacitor on VDD, keep analog and digital ground planes separated, and ensure analog inputs stay within the specified input range (0 V to VREF or 0 V to 5 V). This page synthesizes distributor pricing, drop-in same-package alternatives, and practical design notes not found on the manufacturer datasheet, giving engineers a single reference for sourcing, comparison, and design-in.
MAX154BCAG+T - 8-Bit 4Ch 400ksps 5V Precision ADC | Maxim
The Maxim MAX154BCAG+T is a CMOS 8-bit, 4-channel, 400 ksps analog-to-digital converter (ADC) with an integrated 2.5 V on-chip reference, housed in a 24-pin SSOP (CAG) package. According to the Maxim MAX154/MAX158 datasheet, this multi-channel ADC features a 2.5 us conversion time, four analog input channels (the MAX158 has eight), and a complete data-acquisition system on chip including track/hold, reference, and three-state output buffers. The B grade (MAX154B) provides +/-1 LSB INL over the commercial 0C to 70C operating range, while the +T suffix indicates Tape & Reel packaging for high-volume assembly. An ADC (Analog-to-Digital Converter) is a data-acquisition IC that translates continuous analog voltages into discrete digital codes, sitting at the boundary between the analog sensor domain and the digital processor domain within the broader signal chain hierarchy of sensor -> analog front end -> ADC -> microcontroller/DSP. The MAX154BCAG+T belongs to the successive-approximation register (SAR) ADC family, the dominant topology for medium-speed, medium-resolution applications up to a few MSPS where deterministic latency and low power consumption matter more than the raw throughput of pipeline ADCs. Its on-chip 2.5 V reference removes the need for an external precision reference IC, simplifying the BOM for cost-sensitive multi-channel systems. Key features include four single-ended analog inputs with software-configurable channel selection, a 2.5 us successive-approximation conversion engine, on-chip 2.5 V reference (and optional external reference mode), three-state digital outputs for direct microprocessor bus interface, single +5 V supply operation with low CMOS power dissipation, and a half-LSB quantization step of 9.8 mV when using the internal 2.5 V reference across the 0 V to 5 V input span. The internal reference also sources up to 5 mA external current, useful for biasing external signal-conditioning circuitry. The MAX154 architecture pairs a capacitive-DAC SAR core with an input track-and-hold and a low-drift buried-zener reference, achieving the +/-1 LSB integral nonlinearity specified for the B grade and providing a complete data-acquisition subsystem in a single IC. The four input channels share a single ADC core through an internal analog multiplexer, reducing silicon cost relative to per-channel dedicated converters at the expense of throughput during sequential channel scans. Typical applications include data-acquisition front ends for industrial process-control PLCs, multi-slot rack-mounted instrumentation, supervisory distribution and data-logging systems, embedded control boards monitoring temperature/pressure/flow sensors, and portable or rack-mount medical-instrument signal chains. The wide supply tolerance and integrated reference also make it attractive for low-cost microcontroller-based measurement nodes. When designing with this ADC, place the 0.1 uF + 10 uF supply bypass capacitors as close as possible to the +VDD and DGND pins to prevent digital noise from coupling into the analog comparator. Use AGND and DGND star-grounding at the IC reference pin, and verify that the source impedance seen at AIN pins stays below 2.5 kohm to keep track-and-hold settling errors below 0.5 LSB at 400 ksps. This page synthesizes distributor pricing, drop-in alternatives from the Maxim MAX154/MAX158 family, and practical design notes not collected in the manufacturer datasheet.
MAX154BCWG - 8-Bit 400ksps 4-Ch ADC with Reference | Maxim
The Maxim Integrated MAX154BCWG is a CMOS 8-bit analog-to-digital converter with 4 analog input channels, an internal 2.5V reference, and a track-and-hold amplifier, housed in a 24-pin SOIC wide-body package with conversion time of approximately 2.5 us per channel via successive-approximation register (SAR) architecture at up to 400 ksps aggregate throughput. What is an ADC? An ADC (Analog-to-Digital Converter) is a data-converter IC that samples continuous analog voltage signals and translates them into discrete binary codes for digital processing. Within the data-converter hierarchy, the MAX154 sits in the SAR branch (low-latency, deterministic-conversion) rather than the delta-sigma or pipeline branches. The MAX154 family (MAX154 4-channel, MAX158 8-channel) is part of Maxim's multi-channel 8-bit ADC portfolio introduced in the late 1980s and remains in production for legacy industrial and instrumentation designs. Key features include four single-ended analog inputs with on-chip channel selection (user-controlled via address latches), an internal 2.5V bandgap reference (10 ppm/°C typical drift), wide ±5V analog input range accepting bipolar signals, and an on-chip clock that simplifies external interfaces. The 24-pin SOIC wide-body package provides ample thermal headroom for industrial environments from 0°C to +70°C (C-grade). Typical applications include multi-channel data-acquisition systems, process-control instrumentation, battery-powered portable test gear, digital panel meters, and embedded industrial-control I/O modules where several sensor signals must be digitized with a single ADC. Compared with modern 12/14/16-bit SAR ADCs, the 8-bit MAX154 trades resolution for very high sample rate and small channel-count BOM cost. Design consideration: place the MAX154 close to the analog signal source to minimize trace noise, use a 0.1 uF ceramic bypass capacitor at VDD with a 10 uF bulk cap, and buffer the analog inputs with op-amps when the source impedance exceeds 5 kohm. The internal reference can be overdriven by an external reference for applications needing tighter absolute accuracy. This page consolidates distributor pricing, drop-in alternatives, and practical design notes not found in the Maxim datasheet alone.
MAX155ACPI+ - 8-Ch 8-Bit 250ksps ADC w/ Simultaneous T/H | Maxim
The Maxim Integrated (Analog Devices) MAX155ACPI+ is an 8-bit, 250 ksps, 8-channel successive-approximation analog-to-digital converter (ADC) with simultaneous track-and-hold stages and an internal 2.5 V reference, housed in a 28-pin PDIP (300 mil) through-hole package. It integrates eight sample-and-hold amplifiers so that all input channels are sampled at the same instant, eliminating channel-to-channel timing skew in multiplexed data-acquisition systems. When operating from a single +5 V supply, the MAX155ACPI+ supports both unipolar and bipolar conversions in single-ended or differential input configurations, with 4 or 8 input channels selectable via software. The device features power-down capability for low-power standby between conversions, an internal +2.5 V reference, and a parallel data interface for high-throughput microprocessor connections. According to the manufacturer datasheet, the MAX155 provides a complete sampling data-acquisition system on a single chip, making it suitable for multi-sensor measurement systems where timing alignment is critical. A successive-approximation register (SAR) ADC is a type of analog-to-digital converter that uses a binary search algorithm to resolve an analog input voltage into a digital code, one bit per clock cycle. SAR ADCs are characterized by low latency (no pipeline delay), deterministic conversion time, and excellent DC accuracy, making them well-suited for multiplexed multi-channel systems, precision DC metering, industrial process control, and data-acquisition front-ends. The MAX155's simultaneous sampling T/Hs set it apart from a generic 8-channel SAR: by capturing all eight inputs at the same moment, downstream digital processing can compute true per-sample differential measurements across the array. Key features include 250 ksps aggregate throughput (with simultaneous sampling across all channels), an internal 2.5 V reference with low drift, software-selectable 4-/8-channel operation, single +5 V supply operation, on-chip T/H per channel, parallel microprocessor interface, and a hardware power-down pin that reduces supply current between conversions. The wide input range supports both single-ended (0-VREF) and true bipolar (±VREF) signals. The MAX155 is built on a BiCMOS process that combines low-noise bipolar analog front-ends with CMOS logic for low power dissipation. Internal clock generation and a self-calibrating architecture minimize external component count, while the parallel interface allows direct connection to microprocessors and FPGAs for high-speed system integration. Typical applications include multi-channel instrumentation and data-acquisition systems, vibration and modal analysis, motor control feedback loops, multichannel process control, medical monitoring front-ends, and any system where multiple analog signals must be sampled simultaneously for time-coherent analysis. When designing with the MAX155ACPI+, ensure the analog input source impedance stays below the value specified in the datasheet to maintain acquisition accuracy. Decouple VDD and AVDR with 10uF tantalum and 0.1uF ceramic capacitors placed close to the pins, and keep analog and digital grounds tied to a single star point to minimize crosstalk. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone, including cross-brand comparison and pinout reference.
MAX155AEWI - 8-Ch 8-Bit ADC Simultaneous T/H +2.5V Ref
The Analog Devices (formerly Maxim Integrated) MAX155AEWI is a high-speed, 8-channel, 8-bit analog-to-digital converter that integrates simultaneous track-and-hold amplifiers, a precision +2.5 V internal reference, and a parallel interface in a 28-pin wide SOIC package. It performs successive-approximation conversions at throughput up to 250 ksps and supports unipolar/bipolar, single-ended/differential input modes from a single +5 V supply. An ADC (analog-to-digital converter) converts continuous analog signals into discrete digital codes, sitting between analog front-ends and digital processing blocks in any data-acquisition system. A successive-approximation register (SAR) ADC, the architecture used in the MAX155, performs bit-by-bit decisions against a reference in a single conversion clock cycle, trading high speed for moderate resolution. ADCs are a sub-category of data converters within the broader mixed-signal semiconductor family; the MAX155 adds simultaneous track-and-hold, an important innovation that lets up to 8 inputs be sampled within a few hundred nanoseconds of each other - critical for phase-coherent multichannel measurements where channel-to-channel skew would otherwise corrupt the result. Key features include eight single-ended or four differential analog input channels, software-configurable unipolar/bipolar ranges, a +2.5 V internal bandgap reference (with optional external reference input), a throughput rate of 250 ksps with 6 microsecond conversion time, and power-down control that drops supply current to under 50 microamps for battery-sparing designs. The MAX155AEWI variant is specified for the -40 °C to +85 °C extended industrial temperature range and is offered in a wide-body 28-SOIC package for robust surface-mount assembly. Inside the device, eight input track-and-hold blocks feed a single shared SAR core and DAC reference ladder; the +2.5 V reference is buffered and brought out to a pin for use by external sensor bridges or ratiometric networks, eliminating a separate reference IC. The parallel interface separates conversion control (WR) from data retrieval (RD), and the channel configuration RAM is addressable through a shared 8-bit bus - this dual mode was a common Maxim innovation in early 1990s data-acquisition parts and is still quoted in modern designs as a clean way to multiplex a single bus. Typical applications include multi-channel data-acquisition front-ends in industrial process instrumentation, sensor array digitizers where simultaneous sampling is required (load-cell weigh scales, vibration monitoring, multi-phase power metering), portable instrumentation powered from +5 V rails, and embedded digital-control loops. The wide SOIC package, single-supply operation, and integrated reference make the part especially attractive for space-constrained designs that need many sampled channels. When using the MAX155AEWI, ensure that the analog inputs remain within the common-mode range of the track-and-hold amplifiers (typically VDD - 1.5 V to GND) and that decoupling includes a 10 microfarad bulk capacitor plus a 0.1 microfarad ceramic close to each supply pin. Because the +2.5 V reference is brought out to a pin, it must be buffered with an op-amp if used to drive low-impedance loads. This page consolidates distributor pricing, drop-in alternatives such as MAX155AEWI+, MAX155ACWI, MAX155BEWI and MAX155BCWI, plus practical design notes not found in the manufacturer datasheet.
MAX155BEPI+ - 8-Channel 8-Bit 250ksps SAR ADC | Maxim Integrated
The Maxim Integrated MAX155BEPI+ (now supplied by Analog Devices) is a high-speed, 8-bit, multi-channel successive-approximation analog-to-digital converter (SAR ADC) with 4 or 8 single-ended/differential analog input channels, integrated simultaneous track-and-hold amplifiers, and an internal 2.5V reference, packaged in a 28-pin plastic DIP (PDIP-28) through-hole package. It delivers sampling rates up to 250 ksps and is qualified for the -40C to +85C industrial temperature range, with the "B" speed grade distinguishing it from the slower "A" grade (the "EPI" suffix denotes the industrial temp PDIP package). A SAR ADC is a type of analog-to-digital converter that converts an analog input into a digital code using a binary-search successive-approximation register. SAR ADCs sit in the broader hierarchy: ADC -> data converter -> mixed-signal IC -> integrated circuit. They are favored over delta-sigma and pipeline ADCs when the application needs low latency, deterministic acquisition time, and moderate-to-high sampling rates without pipeline delay, making them common in industrial multiplexing, motor control, and instrumentation loops. The key differentiating features of the MAX155 are its eight simultaneous track/hold amplifiers (one per channel) that eliminate channel-to-channel sampling skew, the internal precision 2.5V reference (saving board space and BOM cost), and a flexible parallel data interface compatible with most microcontrollers and DSPs. Each input channel can be configured as single-ended or differential, and an analog multiplexer under software control selects which channel the SAR core digitizes while all eight T/Hs sample at the same instant. Architecturally, the device combines an 8:1 input MUX, eight dedicated sample-and-hold capacitors, a single shared SAR core, an internal reference buffer, and a parallel output register. This "MUX + simultaneous T/H" topology trades simultaneous-snapshot timing accuracy (typically <50 ns channel-to-channel skew) for the throughput ceiling of one ADC core. The "B" grade offers the fastest conversion time in the MAX155 family. Typical applications for the MAX155BEPI+ include industrial process control data acquisition boards, multi-axis motor position feedback, multiplexed thermocouple or strain-gauge signal chains, simultaneous-sampling vibration/acoustic analyzers, and embedded instrumentation front-ends. The DIP-28 package is friendly to breadboard prototyping, legacy through-hole designs, and educational lab work where surface-mount packages are inconvenient. When designing with this part, ensure the analog inputs remain within the supply rails (typically +/-5V or 0-5V with VDD=+5V, VSS=-5V) and add a 10 nF ceramic bypass on the reference pin to maintain low-noise conversions. Because the part is now in Last Time Buy status per distributor listings, consider the MAX155BEWI+ (SOIC-28) or other drop-in-compatible ADC alternatives listed below for new production runs. This page synthesizes distributor pricing, drop-in compatible 8-channel SAR ADC alternatives, and practical layout/design notes not aggregated in the manufacturer datasheet alone.
MAX156BCNG - 8-Ch 8-Bit 250ksps ADC w/ T/H | Maxim Integrated
The Maxim Integrated MAX156BCNG is an 8-bit, 8-channel successive-approximation analog-to-digital converter (ADC) with simultaneous track-and-hold amplifiers and an internal 2.5V reference, sampling at up to 250 ksps in a 24-pin PDIP through-hole package. It integrates two or four input channels (selectable via software) with dual simultaneous sample-and-hold stages that capture two analog signals at exactly the same instant, eliminating inter-channel skew in vector measurements. The device operates from a single +5V analog supply plus a digital 5V supply and features a parallel microprocessor interface for fast data transfer. A successive-approximation ADC is a type of data converter that resolves each conversion one bit at a time using an internal binary-search algorithm, offering a favorable trade-off between speed, resolution, and die size compared to flash or sigma-delta architectures. SAR ADCs sit in the hierarchy: ADC -> data converter -> mixed-signal IC -> semiconductor. The MAX156's 8-bit resolution and 250 ksps throughput place it in the mid-speed data-acquisition tier used for instrumentation, video digitizing, and DSP front-ends where 8-bit dynamic range is acceptable. Key features include 8 input channels (software-configurable as 2 or 4 single-ended inputs or differential pairs), simultaneous track-and-hold for paired channels, internal +2.5V reference with external override option, single +5V analog supply plus digital 5V supply, and a parallel interface compatible with most microprocessors. The device guarantees no missing codes over the full operating temperature range and provides ±1 LSB linearity. Typical applications include multichannel data-acquisition systems, simultaneous-sampling instrumentation, DSP front-end analog input stages, industrial process control with multiple sensors, and portable or benchtop test equipment. The internal reference simplifies BOM and layout while keeping the device suitable for cost-sensitive multi-channel designs.
MAX156BENG - 8-Ch 8-Bit 250ksps ADC with T/H | Maxim Integrated
The Maxim Integrated MAX156BENG is a high-speed, 8-channel, 8-bit analog-to-digital converter with simultaneous track-and-hold amplifiers and an internal 2.5V reference, housed in a 24-pin PDIP (DIP-24) through-hole package. It supports throughput up to 250 ksps per channel (278 ksamples/sec aggregate sample rate is reported by some distributor sources) and operates from a single 4.75V to 5.25V analog supply with low 2.7 mA operating current. The MAX156BENG targets multiplexed data-acquisition front-ends where simultaneous sampling of multiple analog inputs is required. A successive-approximation ADC (SAR ADC) is a type of analog-to-digital converter that resolves one bit per clock cycle using a binary search across an internal DAC and comparator, achieving a deterministic conversion time and low latency. The simultaneous track-and-hold front-end on every channel captures all inputs at exactly the same instant, preserving phase relationships between channels - critical for multi-phase power, vibration analysis, and motor-control feedback. This places the MAX156 in the data converter hierarchy: ADC -> data converter -> mixed-signal IC -> semiconductor. Key features include 8 single-ended analog input channels, an internal 2.5V reference, input range of 0V to +2.5V unipolar or ±2.5V bipolar (with external reference and signal conditioning), and software-configurable unipolar/bipolar operation per the device datasheet. The +2.5V reference output can drive external circuitry. The MAX156BENG is the through-hole commercial-temperature variant (0C to +70C); the MAX156BENG+ suffix denotes the industrial-grade (-40C to +85C) version. The 24-pin PDIP footprint supports breadboard-friendly prototyping and easy hand-solder rework. Architecture: an input multiplexer feeds eight track-and-hold amplifiers whose outputs connect to a single SAR core with an integrated reference. Conversion control is via a standard microprocessor-compatible parallel interface with read, convert, and chip-select signals. The device dissipates approximately 13.5 mW at 5V/250 ksps and powers down between conversions for battery-friendly operation. Typical applications include multi-channel data acquisition systems, industrial process control, vibration and modal analysis, motor control phase-current sampling, portable instrumentation, and automated test equipment front-ends. The 250 ksps/channel rate comfortably digitizes audio-bandwidth signals from 8 sensors simultaneously. Design considerations: place 0.1uF bypass capacitors close to VDD and VSS pins; route analog and digital grounds as separate planes tied at a single point near the ADC. The internal reference requires an external capacitor for noise filtering - consult the datasheet for the recommended value. Choose the MAX156BENG+ (industrial grade) for outdoor or industrial environments; the MAX156BENG without suffix is rated 0C to +70C only. This page synthesizes distributor pricing from DigiKey, Mouser and LCSC, drop-in same-package alternatives from the MAX15x and MAX12x Maxim ADC families, and practical layout notes not consolidated in the manufacturer datasheet.
MAX157ACUA - 10-Bit 108ksps 2-Ch SAR ADC | Maxim Integrated
The Maxim Integrated (now Analog Devices) MAX157ACUA is a low-power, 2-channel, 10-bit successive-approximation analog-to-digital converter (ADC) operating from a single +2.7V to +5.25V supply and housed in an 8-pin µMAX (UMAX) surface-mount package. According to the Maxim datasheet, the device delivers a 108 ksps sampling rate through a 7.4 µs successive-approximation conversion engine and features automatic power-down between conversions to extend battery life in portable applications. The MAX157ACUA communicates with a host microcontroller over an SPI/QSPI/MICROWIRE-compatible serial interface. An SAR ADC (Successive-Approximation Register Analog-to-Digital Converter) is a type of data converter that uses a binary search algorithm combined with an internal DAC to convert an analog input to a digital code, typically one sample at a time with no pipeline latency. SAR ADCs sit within the broader hierarchy of analog-to-digital converters, alongside delta-sigma, pipeline, and flash architectures; they are valued for low power consumption, deterministic latency, and good DC accuracy at moderate sampling rates, making them well-suited for instrumentation, sensor read-out, and embedded data-acquisition designs. Key differentiating features of the MAX157ACUA include a 2-channel input mux (2 analog inputs selectable through software), an integrated +2.5V reference (factory-trimmed, with REF option on select variants), an external reference input for flexibility, low operating supply current, and hardware/software shutdown mode that drops the supply current to < 1 µA in standby. The wide 2.7V-5.25V supply range permits operation directly from a single-cell Li-ion battery or a 3.3V/5V regulated rail. Architecturally, the MAX157ACUA employs a charge-redistribution DAC with a built-in sample-and-hold, controlled by an SAR logic core that produces 10-bit results over four internal clock cycles. The device supports both unipolar (0-VREF) and pseudo-bipolar (VREF/2 offset) input ranges when driven in two's-complement mode, providing flexibility for single-supply signal-chain applications. Typical applications for the MAX157ACUA include portable data loggers, battery-powered sensor read-out boards, industrial process-control loops, panel meters, and embedded system front-ends where low power and small footprint matter more than extreme sampling speed. This page synthesizes distributor pricing, drop-in alternatives, and practical design guidance not found in the manufacturer datasheet alone. When designing with this device, place a 0.1 µF decoupling capacitor close to the VDD pin and a 10 µF bypass on the reference output if the internal reference is used. Operating at the higher 5 V supply yields the best dynamic range, but always observe the absolute-maximum VDD rating from the datasheet.
MAX157ACUA+T - 10-Bit 108ksps 2-Ch SAR ADC, 8-uMAX | Maxim Integrated
The Maxim Integrated MAX157ACUA+T is a low-power, 10-bit, 2-channel, 108 ksps successive-approximation analog-to-digital converter (ADC) in an 8-pin µMAX/uSOP package with tape-and-reel packaging. It operates from a single +2.7 V to +5.25 V supply and consumes only 1.3 mA at full sampling rate, dropping to under 1 µA in its automatic power-down mode between conversions. A SAR (Successive-Approximation Register) ADC is a type of Nyquist-rate data converter that performs one binary search per clock cycle to resolve the input voltage against an internal DAC. SAR ADCs sit in the converter hierarchy as a sub-class of ADC -> data converter -> mixed-signal IC, alongside delta-sigma, pipeline, and flash architectures. Because SAR converters sample on demand and present a single conversion result per start pulse, they are the dominant topology for multiplexed multi-channel low-latency acquisition in micro-controller-based embedded designs, where the converter is co-located with a SPI/QSPI/MICROWIRE host. Key features of the MAX157ACUA+T include two single-ended analog input channels (AIN1, AIN2) selected via software, an on-chip +4.096 V reference (no external reference required for absolute measurements), an internal 4 MHz oscillator, a 7.4 µs successive-approximation core, and a serial interface compatible with MICROWIRE, QSPI, and SPI-compatible hosts. The +T suffix denotes tape-and-reel packaging for high-volume SMT assembly. The MAX157ACUA+T is intended for battery-powered and space-constrained systems where both low power and small PCB footprint matter. Typical applications include portable data loggers, sensor signal conditioning, loop-powered 4-20 mA transmitters, handheld instrumentation, and battery management monitoring where a 10-bit result is sufficient. The internal reference and 2-channel input multiplexer eliminate the external reference and analog switch, reducing BOM cost and board area. Designers should note the 8-pin µMAX footprint and the SPI/QSPI-compatible 4-wire serial interface. Because the device is a SAR converter, an external anti-aliasing RC low-pass filter on each analog input is recommended when wideband noise exceeds the Nyquist frequency relative to the 108 ksps sampling rate. This page synthesizes distributor pricing from DigiKey and Octopart, drop-in replacement cross-references from same-family Maxim parts, and design considerations not found in the manufacturer datasheet, including external reference options and analog front-end filter recommendations for the 108 ksps sample rate.