ADC/DAC
製品 (2398)
MAX174CEPI - 12-Bit 125ksps ADC | Maxim Integrated / ADI
The Maxim Integrated MAX174CEPI (now supplied by Analog Devices) is an industry-standard, complete 12-bit analog-to-digital converter (ADC) that combines high speed, low power dissipation, and on-chip clock plus voltage reference in a single 28-pin PDIP (DIP-28, plastic through-hole) package. Built on Maxim's BiCMOS process, it delivers up to 125 ksps conversion rate with a maximum conversion time of 8 microseconds, while consuming only about 150 mW of power - roughly one-third the dissipation of comparable 12-bit ADCs of its era. A successive-approximation ADC (SAR ADC) is one of the most widely used ADC architectures because it provides deterministic, low-latency conversions and excellent DC accuracy. In the hierarchy of data-converter categories, the SAR ADC sits alongside flash, sigma-delta, and pipeline ADCs; compared with sigma-delta, it offers wider bandwidth and lower latency, and compared with flash, it provides much higher resolution at modest cost. The MAX174 sits at the high-speed end of the 12-bit SAR family and is intended for parallel (parallel-byte) microprocessor interfaces. Key features of the MAX174CEPI include pin-strappable analog input ranges of 0 to +10 V or 0 to +20 V unipolar, plus bipolar ranges of ±5 V or ±10 V - covering the full range of industrial process-control signal levels. The on-chip buried-zener reference and internal clock remove the need for external precision components, while a standard microprocessor interface architecture (with separate 8/12/16-bit bus compatibility) simplifies digital hook-up. The device offers three-state output buffers, monotonic performance (no missing codes over the operating range), and a control line that lets the user select 8-bit or full 12-bit conversion. Typical applications include high-speed data-acquisition front ends, industrial process-control input boards, digital signal processing front ends, and audio/speech digitisation. It is also widely used in instrumentation and telemetry equipment where 12-bit resolution and 8 microsecond conversion time are sufficient for the signal bandwidth involved. When designing with this part, observe the standard Maxim bipolar-input conditioning recommendations: bypass all supply pins close to the IC and add a 100 ohm series resistor on the analog input to drive the internal buffer cleanly. Operate from +/-15V and +5V supplies as called out in the datasheet. Because this is a through-hole 28-pin DIP, it suits legacy industrial and instrumentation designs rather than new high-density SMT layouts.
MAX176ACPA - 12-Bit 250ksps Serial ADC, 8-PDIP | Maxim
The Maxim MAX176ACPA is a 12-bit, 250 ksps, serial-output analog-to-digital converter (ADC) integrated in an 8-pin PDIP package, designed for high-speed data acquisition in industrial process control, instrumentation, and embedded systems. It combines a 0.4 us maximum acquisition-time track-and-hold amplifier, a 3.5 us successive-approximation ADC core, and an on-chip buried-zener voltage reference, delivering complete single-chip conversion functionality with serial interface output. An ADC (analog-to-digital converter) is a mixed-signal integrated circuit that samples continuous analog signals and converts them into discrete digital codes for processing by microcontrollers, DSPs, or FPGAs. Within the broader taxonomy, the MAX176ACPA belongs to SAR (Successive Approximation Register) ADCs -> data converters -> signal chain ICs -> mixed-signal semiconductors. SAR ADCs are favored over delta-sigma and pipeline architectures when low latency and deterministic throughput are required, particularly in multiplexed multi-channel systems and servo-loop control applications. Key differentiating features include the 250 ksps guaranteed throughput, 12-bit resolution with no missing codes, an internal buried-zener reference providing low drift and low noise, single +5 V analog supply operation with a -5 V or larger negative reference option for bipolar input ranges, and a 3-wire (SPI/QSPI/MICROWIRE-compatible) serial interface that reduces pin count versus parallel-output ADCs of equivalent speed. Architecture-wise, the MAX176ACPA uses a charge-redistribution switched-capacitor DAC inside the SAR loop. Track-and-hold is implemented as an open-loop input stage that settles to 12-bit accuracy in 0.4 us minimum. The buried-zener reference is factory-trimmed, eliminating the need for external reference components and shrinking the BOM versus ADCs that require external 2.5 V or 5 V references. Typical applications span data acquisition systems, process control front-ends, portable instrumentation, weigh scales, and digital signal processing front-ends where a compact, low-pin-count ADC with internal reference is required. The 8-pin PDIP form factor also supports through-hole prototyping on breadboards and legacy industrial backplanes. Designers should pay attention to input-signal conditioning: the MAX176ACPA accepts a unipolar 0 to +5 V input (with bipolar operation possible using the VEE pin and external driver). Source impedance should be kept below a few hundred ohms to avoid conversion-time errors. Decouple AVDD with a 10 uF tantalum in parallel with a 0.1 uF ceramic placed close to the pin. This page synthesizes current distributor pricing, factory-package drop-in alternatives including the MAX176BCPA and MAX176AMJA, application guidance, and design notes not found in the manufacturer datasheet alone.
MAX176AEPA - 12-Bit 250ksps SAR ADC with Reference | PDIP-8
The Maxim Integrated MAX176AEPA is a 12-bit, 250 ksps successive-approximation analog-to-digital converter (ADC) with an internal track/hold amplifier and buried-zener voltage reference, housed in an 8-pin PDIP package. It operates from a single +5 V supply, draws 4 mA typical operating current, and provides a serial SPI/QSPI/MICROWIRE-compatible data interface that simplifies opto-isolation and board-to-board wiring. The internal 12-bit reference and small external parts count make it a true single-chip data-acquisition solution. An ADC (analog-to-digital converter) is a mixed-signal integrated circuit that converts a continuous analog voltage at its input into a discrete digital code at its output. Within the broader taxonomy, an ADC belongs to data conversion ICs, which sit under mixed-signal ICs and ultimately the semiconductor family. Successive-approximation-register (SAR) ADCs such as the MAX176 use an iterative binary-search algorithm combined with an internal DAC, achieving an excellent trade-off between speed, resolution, and power consumption. The MAX176 specifically integrates a track/hold front-end and a precision reference on-chip, removing the need for an external reference or sample-and-hold circuit. Key specifications include 12-bit resolution (no missing codes), 250 ksps throughput, ±0.5 LSB integral nonlinearityity (INL, max), ±1 LSB differential nonlinearityity (DNL, max), 1.5 µs track/hold acquisition time, 3.5 µs conversion time, and a true bipolar ±5 V or 0–5 V analog input range. The on-chip buried-zener reference provides a low 5 ppm/°C typical temperature drift, eliminating external reference drift in instrumentation designs. The serial interface supports an external clock up to the full conversion rate, enabling easy interface to SPI, QSPI, and MICROWIRE-compatible microcontrollers without glue logic. Typical applications include high-speed data logging, pen-digitizers and digitizing oscilloscopes, industrial process control, sonar/audio signal processing, and battery-powered or remote-sensor instrumentation. Its 4 mA operating current and small 8-pin DIP footprint suit designs where board area and supply drain both matter. When designing with this part, place 0.1 µF ceramic bypass capacitors as close as possible to the supply pin and use a clean analog ground to avoid digital switching noise coupling into the analog input. For systems that already use a higher-resolution SAR ADC, the MAX176 remains a reliable workhorse for legacy and industrial designs. This page synthesizes distributor pricing, drop-in pin-compatible alternatives, application guidance and design notes not found in the bare datasheet, including comparisons against the MAX176BCPA+ and MAX176BEPA+ variants.
MAX176AEPA+ - 12-Bit 250ksps Serial ADC with T/H | Maxim Integrated
The Maxim Integrated MAX176AEPA+ is a 12-bit, 250 ksps serial-output analog-to-digital converter (ADC) with an integrated track-and-hold amplifier and buried-zener voltage reference, housed in an 8-pin PDIP plastic package. It combines a fast 0.4 µs track-and-hold, a 3.5 µs successive-approximation ADC core, and an on-chip reference in a single through-hole IC, simplifying mixed-signal front-end design. Operating from a single +5 V supply (with a -12 V or -15 V supply for VSS in some applications), it dissipates typically under 50 mW, suiting it for industrial process control and instrumentation. An ADC is a data converter that translates a continuous analog input voltage into a discrete digital code. Successive-approximation register (SAR) ADCs such as the MAX176AEPA+ perform the conversion in N clock cycles for an N-bit result, balancing conversion speed against power and silicon area. Compared with flash and pipeline architectures, SAR ADCs offer deterministic latency and low noise at moderate sampling rates, making them the de-facto choice for multiplexed 12-bit industrial and instrumentation front ends where they would otherwise require a separate reference and a discrete sample-and-hold. Key specifications include 12-bit resolution with ±1 LSB (max) linearity, 250 ksps throughput, ±5 V analog input range (unipolar or bipolar with external scaling), and a 0.4 µs track-and-hold acquisition time. The integrated buried-zener reference delivers low drift and low noise, eliminating the need for an external precision reference in many designs. The serial interface reduces pin count and isolates the digital noise from the analog front end, and the device is specified over the -40 °C to +85 °C industrial temperature range. Internally, the MAX176AEPA+ uses a charge-redistribution DAC switched by a thin-film resistor ladder, a high-bandwidth input track-and-hold capable of digitizing fast signals without slew-rate-induced error, and a buried-zener reference biased from the +5 V and -15 V rails for low temperature coefficient. Its serial interface is compatible with standard SPI/QSPI/MICROWIRE microcontrollers, simplifying the digital board-side connection to a single chip-select, clock, and serial-data line. The combination of low aperture delay and a quiet on-chip reference makes the part well-suited to multiplexed data-acquisition channels sharing a single converter. Typical applications include industrial process-control data-acquisition front ends, weigh-scale and strain-gauge instrumentation, portable battery-powered measurement, panel-meter signal conditioning, and closed-loop servo control. It also serves medical instrumentation front ends and sensor-signal digitizers where a precision reference and sample-and-hold are needed in a small through-hole footprint. When designing with the MAX176AEPA+, place the 0.1 µF supply bypass capacitors as close as possible to pins 1, 7, and 8, and provide a low-impedance analog ground return to minimize digital switching noise coupling into the analog input. The +5 V supply should be low-noise, because the reference derives directly from it; for best linearity performance, the negative supply (VSS) should be a clean -12 V to -15 V rail rather than generated locally from the +5 V line. This page consolidates distributor pricing, drop-in same-family alternatives, and PCB design notes that are not collected in a single location on the manufacturer's datasheet, giving engineers a single decision-grade reference for selecting or replacing the MAX176AEPA+.
MAX176BEWE - 12-Bit 250ksps Serial ADC with T/H | Maxim
The Maxim MAX176BEWE is a 12-bit, 250 ksps successive-approximation analog-to-digital converter (ADC) with an integrated track-and-hold amplifier and on-chip buried-zener voltage reference, housed in a 16-pin wide-body SOIC (SO-16W / WSOIC-16) package. According to the manufacturer product page, the device operates from a single +5 V analog supply and a separate +5 V digital supply, draws approximately 50 mW of operating power, and supports a bipolar analog input range of ±5 V when running in bipolar mode. The MAX176 family is recommended for new designs and provides a serial interface compatible with SPI/QSPI/MICROWIRE, which makes it easy to connect to microcontrollers, DSPs, or shift registers without bus contention. An ADC (analog-to-digital converter) is a mixed-signal integrated circuit that converts a continuous analog voltage at its input into a discrete digital code. SAR (Successive Approximation Register) ADCs use a binary-search algorithm to settle one bit per clock cycle, balancing speed against power and area. The MAX176 belongs to the higher-level hierarchy: data converter -> ADC -> SAR ADC -> precision 12-bit data-acquisition IC, and is commonly classified under signal-chain data-acquisition components. Key features include 12-bit resolution with no missing codes, 0.5 LSB integral non-linearity (INL) and ±1 LSB gain error, a 0.4 µs maximum track-and-hold acquisition time, 3.5 µs conversion time, and an internal buried-zener reference that typically holds ±25 ppm/°C drift. The on-chip reference and T/H eliminate most external analog components, so the only external parts needed are supply bypass capacitors and the serial-interface pull-up. Typical applications include data-acquisition front ends for industrial instrumentation, precision sensor signal conditioning (load cells, strain gauges, thermocouple cold-junction compensation), portable or benchtop digital multimeters, audio and vibration analysis, and embedded process-control loops. The 250 ksps throughput is sufficient for these mid-speed measurement channels and far exceeds the needs of most temperature and weigh-scale instruments. When designing with this part, ensure that the analog and digital grounds are tied at a single point (star-ground) and that the 10 µF tantalum plus 0.1 µF ceramic decoupling pair is placed within 10 mm of the supply pins. The shutdown pin reduces supply current to microamp levels between conversions for low-power battery designs, and an external clock or micro-controller serial clock can drive the SCLK input up to 5 MHz. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
MAX177CNG+ - 10-Bit 100kSPS SAR ADC, 24-PDIP | Maxim Integrated
The Maxim Integrated MAX177CNG+ is a 10-bit resolution, 100 ksps (kilosamples per second) successive-approximation-register (SAR) analog-to-digital converter with an integrated sample-and-hold (track-and-hold) amplifier, packaged in a 24-pin PDIP (Plastic DIP) through-hole package. The part operates from a single +5V supply and provides a parallel microprocessor-compatible output interface, making it a classic choice for legacy data acquisition boards, industrial process control front ends, and instrumentation digitizers. A SAR ADC (Successive-Approximation-Register Analog-to-Digital Converter) is a type of Nyquist-rate data converter that uses a binary-search algorithm against an internal precision DAC to determine each digital output code. Within the broader converter hierarchy, the MAX177 sits in the medium-speed precision SAR family, between low-power delta-sigma audio converters and high-speed pipeline/video ADCs. SAR ADCs are favored when deterministic latency, single-shot conversion capability, and low-latency digital readout are required. Key features include 10-bit resolution, a single-ended analog input channel, 100 ksps maximum sampling rate, an internal sample-and-hold, parallel digital output, and a built-in +2.5V reference option that can also be overridden with an external reference. The MAX177CNG+ consumes modest supply current and supports a commercial temperature grade, suiting bench instrumentation, factory automation, and embedded datalogger designs where a through-hole part simplifies prototyping. The MAX177CNG+ uses Maxim's classic CMOS SAR core with charge-redistribution DAC switching, providing excellent DC linearity and low noise at the 100 ksps throughput. The 24-pin PDIP form factor makes the part breadboard-friendly and socket-compatible for educational, replacement, and legacy maintenance applications where surface-mount conversion is not required. Typical applications include single-channel 4-20 mA loop digitizers, transducer signal conditioning outputs, bench-top multimeter front ends, industrial controller analog inputs, and digital oscilloscope scaling/calibration digitizers. The single +5V supply simplifies integration alongside 8051, PIC, and AVR microcontrollers without auxiliary analog rails. When designing with the MAX177CNG+, ensure the analog input driving bandwidth is appropriate for the track-and-hold acquisition time and provide adequate bypassing on VDD and VREF. Add a small RC anti-alias filter ahead of the analog input pin to attenuate out-of-band noise before sampling. This page synthesizes distributor pricing across DigiKey/Mouser/Octopart, drop-in package-compatible alternatives, and practical SAR ADC design notes not consolidated in any single source.
MAX177CWG+ - 10-Bit 100ksps SAR ADC with Track-Hold | Maxim Integrated
The Analog Devices / Maxim Integrated MAX177CWG+ is a 10-bit, 100 ksps successive-approximation analog-to-digital converter (SAR ADC) with an integrated track-and-hold amplifier and buried-zener voltage reference, housed in a 24-pin wide-body SOIC package. The device operates from a single +5 V analog supply and a digital supply programmable from +5 V to +15 V, providing flexible digital-interface level shifting for 3 V, 5 V, or 15 V microcontrollers and ASICs. Conversion time is 8.33 microseconds including the track-and-hold acquisition window, achieving a 100 ksample/s throughput from a CMOS analog front-end. A SAR ADC is a successive-approximation-register analog-to-digital converter that uses an internal binary-weighted capacitor DAC and a comparator to step through bit decisions one clock at a time. It belongs to the medium-speed, medium-resolution converter family sitting between flash ADCs (fast but low resolution) and delta-sigma converters (high resolution but slower). SAR ADCs are widely chosen for multiplexed data-acquisition systems, industrial process control, and portable instrumentation because they offer deterministic latency, no pipeline delay, and excellent DC accuracy for both single-shot and sampled measurements. Key features of the MAX177CWG+ include 10-bit resolution with no missing codes, an internal buried-zener reference offering low temperature drift and low broadband noise, an on-chip track-and-hold capable of settling to 0.5 LSB in 8.33 microseconds, and low CMOS power consumption typically in the milliamp range. The parallel data output bus and standard microprocessor interface simplify hookup to legacy microcontrollers and DSPs without requiring serial-port configuration. Typical applications for the MAX177CWG+ span industrial process control loops, multichannel data-acquisition front-ends, weigh scales, panel meters, portable instrumentation, and digital sensor readouts where bipolar-input signal conditioning and single-supply 5 V operation simplify the analog signal chain. When designing with this part, ensure the analog input signal stays within the input common-mode range of the track-and-hold amplifier and decouple AVDD and DVDD with separate 0.1 microfarat ceramic bypass capacitors placed close to the supply pins. This page synthesizes distributor inventory, drop-in same-family alternatives, and practical layout guidance that goes beyond the manufacturer datasheet headline specifications.
MAX178AENG+ - 12-Bit 17ksps Calibrated SAR ADC | Maxim Integrated
The Analog Devices (formerly Maxim Integrated) MAX178AENG+ is a calibrated 12-bit analog-to-digital converter (ADC) with a successive-approximation register (SAR) architecture, integrated track-and-hold amplifier, on-chip precision voltage reference, and an internal conversion clock, delivered in a 24-pin plastic DIP (N-24) through-hole package. Key headline specifications include 12-bit resolution, 17 ksps sampling rate, 5.25 V maximum analog input range, and an internal laser-trimmed reference with on-the-fly auto-zero calibration that keeps zero errors below 100 uV. An SAR ADC (successive-approximation-register analog-to-digital converter) is a class of data converter that resolves a binary output one bit per internal clock cycle by comparing the sampled input against a precision DAC. SAR ADCs sit in the broader taxonomy of data-acquisition ICs: ADC -> data converter -> data acquisition -> signal chain -> analog/mixed-signal IC -> semiconductor. The MAX178 belongs to the precision, low-to-medium speed SAR family, valued for deterministic latency and intrinsic alias-free sampling without the latency of delta-sigma converters. Key features include a complete on-chip signal chain (T/H, reference, clock) so that no external reference, sample capacitor, or ADC timing components are required; an auto-zero cycle performed on every conversion that holds zero error below 100 uV across the full industrial temperature range; pin-selectable analog input ranges of 0 V to +5 V unipolar or ±5 V bipolar; and serial digital output for direct connection to a microcontroller or DSP. Internal calibration maintains true 12-bit performance from -40 C to +85 C with no external adjustments. The MAX178AENG+ uses a charge-redistribution DAC array trimmed at the factory against an on-chip buried-zener bandgap reference. The integrated track-and-hold has an aperture compatible with the 17 ksps conversion rate, and the bipolar/unipolar input range is selected by a single pin. Compared with bare 12-bit ADC cores, the integrated reference and reference design eliminates the most common sources of gain and offset drift in precision instrumentation. Typical applications include industrial process control data acquisition, multi-channel 4-20 mA sensor digitizers, portable or panel-mount instrumentation, and digital panel meters. The 5 V unipolar / ±5 V bipolar input ranges match the natural signal swing of many transducers, including strain gauges, thermocouple front-ends after amplification, and 4-20 mA current-loop receivers. When designing with the MAX178AENG+, place a 10 uF tantalum bypass capacitor plus a 0.1 uF ceramic directly at the VDD pin to keep logic-noise currents out of the analog reference. Although the ADC is factory-calibrated, avoid running external digital traces directly under the package to minimize coupled noise into the on-chip reference. This page synthesizes distributor pricing, package-aware drop-in alternatives (all 24-pin PDIP), and practical design notes that complement the manufacturer datasheet.
MAX178AEWG - 12-Bit Calibrated ADC, 17ksps, 24-SOIC | Maxim
The Maxim Integrated (now part of Analog Devices) MAX178AEWG is a complete, calibrated 12-bit successive-approximation analog-to-digital converter (ADC) integrating a precision bandgap voltage reference, a track-and-hold (T/H) front-end, and an internal conversion clock. Housed in a 24-pin SOIC wide-body package, the device delivers up to 17 ksps conversion rate from a single +5 V analog supply while accommodating bipolar analog inputs via dedicated bipolar-offset pins. An ADC (analog-to-digital converter) is a mixed-signal integrated circuit that samples continuous analog voltages and encodes them into discrete digital codes. The MAX178 family sits within the SAR (Successive Approximation Register) converter category, which uses an internal capacitive DAC and comparator to converge on the input voltage in N clock cycles. SAR ADCs are favored for their deterministic latency, low power consumption, and excellent DC accuracy - characteristics that place them above integrating converters and flash converters for general-purpose precision measurement. Key features include ±0.5 LSB integral nonlinearity (INL) and ±1 LSB differential nonlinearity (DNL) over the full operating range, an internal 4.096 V reference (Mask A) or external reference option, and an auto-zero cycle on every conversion that reduces zero error to below 100 µV. The device offers three digital-interface modes - 8-bit bus, serial, and stand-alone - selectable via mode pins, and accepts unipolar (0–360 V) or bipolar (±VREF) analog input ranges. The MAX178AEWG carries the commercial 0 °C to +70 °C temperature grade. Architecturally, the MAX178AEWG employs laser-trimmed thin-film resistors and a chopper-stabilized comparator, combined with on-chip calibration logic that corrects gain and linearity errors at power-up. This self-calibration eliminates the need for external trimpots in production, reducing BOM cost and improving long-term drift performance. Throughput is governed by an internal RC oscillator driving the SAR state machine. Typical applications include process-control data acquisition front-ends, weigh-scale signal conditioning, panel-meter and digital-voltmeter designs, temperature-measurement systems (with RTD/thermocouple front-ends), and precision transducer interfaces. The bipolar-input capability simplifies signal paths from bridge sensors and shunt current monitors. When designing with the MAX178AEWG, add 10 µF and 0.1 µF bypass capacitors adjacent to the analog supply pin to keep reference noise below 50 µVrms; a single-point analog ground and a separate digital-ground return are strongly recommended. The internal reference's noise bandwidth scales inversely with the output capacitance, so a larger CREF yields lower noise at the cost of slower power-on settling.
MAX178BCNG - 12-Bit Calibrated ADC with T/H | Maxim Integrated
The Analog Devices (formerly Maxim Integrated) MAX178BCNG is a complete, calibrated 12-bit analog-to-digital converter (ADC) integrating a precision voltage reference, track-and-hold (T/H) amplifier, and SAR conversion logic in a single 24-pin PDIP through-hole package. It delivers a 17 µs conversion time using the successive-approximation architecture, supports ±5V or +5V/-15V analog input ranges, and consumes only 4.5 mA from a single +5V supply. Internal calibration circuitry and a per-cycle auto-zero routine maintain true 12-bit performance over the full commercial 0°C to +70°C operating temperature range, eliminating the need for external trim adjustments. What is a SAR ADC? A successive-approximation-register analog-to-digital converter is a precision data-acquisition IC that uses a binary-search algorithm to convert an analog input voltage into a parallel or serial digital code in N clock cycles for N bits of resolution. SAR ADCs sit within the broader hierarchy of mixed-signal ICs -> data converters -> ADCs, and are valued for their low latency, deterministic throughput, and excellent DC accuracy — making them the dominant choice for multiplexed data-acquisition systems, instrumentation, and process-control front ends. Key features include an internal buried-zener reference (10 ppm/°C typical drift), a ±0.5 LSB integral nonlinearity (INL) maximum specification, zero-error below 100 µV thanks to the per-conversion auto-zero, and a track-and-hold amplifier capable of digitizing full-scale signals up to the Nyquist bandwidth. The MAX178BCNG also exposes a hardware-compatible parallel interface, easing retrofit into designs based on legacy ADC0800-class parts. Architecturally, the MAX178 combines a charge-redistribution CDAC digital section, a bipolar input T/H, a low-noise reference buffer, and on-chip calibration logic that compensates for capacitor-mismatch errors at power-up. The result is no-missing-code 12-bit performance without periodic user recalibration — a significant advantage over older ADCs that required potentiometer trims. Typical applications include industrial process control (4–20 mA loop digitization at the receiver side), multichannel data-acquisition systems in legacy PLCs, weigh-scale and load-cell signal conditioning, benchtop multimeters and panel meters, and precision sensor front-ends for temperature, strain-gauge, and pressure transducers. The wide ±15V input tolerance also suits instrumentation-grade signal chains. A critical design consideration is the input protection network: source impedance should remain below 5 kΩ to avoid IR-drop errors through the ESD diodes, and a 100 nF ceramic bypass on VDD placed within 5 mm of the supply pin is mandatory. The reference output is not designed to drive external loads — buffer it through an external op-amp if multiple ADCs share one reference. This page synthesizes distributor stock, parametric drop-in alternatives within the same Maxim ADC family, and application notes not consolidated in the manufacturer datasheet.
MAX178BCWG - 12-Bit 17ksp/s Precision ADC with T/H and Reference | Maxim Integrated
The Maxim Integrated MAX178BCWG is a calibrated 12-bit analog-to-digital converter (ADC) with 17 ksps throughput, integrated track-and-hold, on-chip precision voltage reference, and conversion clock, packaged in a 24-pin SOIC (W) wide-body package. It accepts unipolar 0V to 5V analog inputs from a single +5V supply and provides a parallel output interface suitable for direct connection to standard microprocessors. The B temperature grade is specified for the commercial 0C to +70C operating range. A SAR (Successive Approximation Register) ADC is a type of precision data converter that uses a binary-search algorithm to digitize an analog input, producing a single sample per conversion cycle. SAR ADCs are valued for deterministic latency, low power consumption, and the absence of pipeline delay, making them well-suited for multiplexed data-acquisition front ends, industrial process control, and instrumentation. The MAX178BCWG belongs to the integrated ADC IC category within the broader data-converter hierarchy of semiconductors, sitting between standalone ADCs and complete system-on-chip mixed-signal ICs. Key differentiating features of the MAX178BCWG include built-in self-calibration that maintains true 12-bit performance across the full commercial temperature range without external trims, an auto-zero cycle on every conversion that holds zero error to below 100 uV, and a tight integral nonlinearity of typically ±0.5 LSB. The internal 4.096 V reference also frees the user from designing a separate reference circuit, reducing external component count. Architecturally, the part combines a capacitive-charge-distribution DAC, a comparator, a SAR register, and a control logic block. The internal reference uses buried-zener trimming for low drift, and the track-and-hold has 1.5 us acquisition time, supporting the 17 ksps maximum sample rate when clocked from an internal oscillator. Typical applications include precision data-acquisition systems, industrial process control loops, portable instrumentation front ends, weigh-scale and strain-gauge signal conditioning, and embedded sensor readouts. Designers favor the MAX178BCWG where a complete, calibrated ADC subsystem with reference is required in a single SO-24 package. When designing with this part, observe the analog input settling requirements for the printed bands - the input must settle within the first acquisition time - and recommend a 2.2 uF bypass capacitor near VDD to keep reference noise low. Designers should also evaluate using the +5V supply directly; the device does not require a separate analog and digital supply. This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet alone, giving engineers a single reference for selection, replacement, and BOM optimization.
MAX181AEPL - 12-Bit 8-Ch 100ksps Data Acquisition IC | Maxim
The Maxim Integrated MAX181AEPL is a complete 12-bit, 8-channel Data Acquisition System (DAS) integrating an analog input multiplexer, wide-bandwidth Track-and-Hold (T/H), low-drift buried zener reference, and a flexible 8-/12-bit microprocessor interface into a single 40-pin PDIP through-hole package. The device converts at up to 100 ksps while drawing low supply current, and is configured via the µP bus for unipolar/bipolar input ranges and single-ended/differential channel operation. A Data Acquisition System (DAS) of this type combines an analog front end (multiplexer + T/H + reference) with a successive-approximation ADC and a digital interface. In the broader system taxonomy, a DAS sits below a data logger or DAQ module and above a discrete SAR ADC; it sits inside the larger category of mixed-signal data converter ICs, which themselves fall under signal-chain and data-acquisition semiconductors. By integrating the multiplexer and reference, the MAX181AEPL removes the need to specify, lay out, and calibrate those external sub-blocks. Key features include eight analog input channels (software-configurable single-ended or differential), a 100 ksps throughput rate, ±5 V input range capability (with ±12 V or ±15 V supplies), successive-approximation conversion, software-selectable unipolar or bipolar operation, and a low-power +5 V supply requirement. The internal reference and T/H deliver the bandwidth and accuracy needed to digitize multiplexed signals without inter-channel settling loss. Technically, the MAX181AEPL uses a charge-balancing successive-approximation architecture with an auto-calibrating internal DAC and an input T/H that supports settling to 12-bit accuracy at the full 100 ksps rate. The internal buried-zener reference provides low drift over temperature, eliminating the need for an external reference in most applications. The microprocessor interface supports both 8-bit-wide and 12-bit-wide bus reads, plus standard Read/Convert signals for compatibility with common µP families. Typical applications include industrial process-control front ends, multi-channel instrumentation data loggers, multiplexed sensor signal conditioning, automatic test equipment (ATE) scan digitizers, and embedded 12-bit measurement subsystems. The 8-channel count maps directly to typical sensor-per-channel counts (4-8 analog sensors per board). When designing with the MAX181AEPL, pay attention to analog-input common-mode and overvoltage protection at the multiplexer. The internal reference, while low-drift, requires a properly decoupled supply rail; place 10 µF tantalum and 0.1 µF ceramic bypass capacitors close to the supply pins. For best 12-bit performance in multiplexed mode, include a T/H settling delay before conversion start. This page consolidates distributor stock and pricing, drop-in MAX181-family alternatives, and practical layout/calibration notes that go beyond what the datasheet alone provides.
MAX181BCPL - 12-Bit 8-Ch 100kSPS Data Acquisition | Maxim
The Maxim Integrated MAX181BCPL is a complete, 8-channel, 12-bit data-acquisition system on a single IC, packaged in a 40-pin PDIP through-hole device. It integrates an 8-channel analog multiplexer, a track/hold amplifier, a successive-approximation analog-to-digital converter (SAR ADC), and digital control logic to deliver 100 kSPS conversion throughput with 12-bit resolution. A data-acquisition IC, often abbreviated DAS or DAQ, is a mixed-signal component that converts multiple real-world analog signals into a digital format that a microcontroller, DSP, or processor can interpret. Within the broader signal-chain hierarchy, the MAX181 sits between front-end sensors/transducers (which produce analog voltages or currents) and a host processor, belonging to the same product family as monolithic ADCs, mixed-signal front-ends, and DAS ICs that combine a MUX, ADC, and reference. Designers choose a fully integrated DAS when they need a small BOM and deterministic timing rather than a discrete mux + external ADC chain. Key differentiating specifications include 100 kSPS throughput, 12-bit resolution with ±1 LSB linearity (max), a track/hold amplifier with sub-microsecond acquisition time, ±5 V input range on selected channels, and a parallel microprocessor interface. The MAX181BCPL operates from ±5 V supplies and supports bipolar input ranges by software configuration, removing the need for external signal conditioning on industrial-level signals. Architecturally, the MAX181 uses a switched-capacitor charge-redistribution SAR core with an internal precision reference, an 8-input analog MUX with break-before-make switching, and an internal clock. The integrated design eliminates most timing skew between channels and removes the layout burden of routing high-frequency analog tracks between a separate MUX and ADC. Typical applications include industrial process-control front ends, multichannel data loggers, portable instrumentation, and embedded analog I/O modules for PLCs. The wide input range, parallel interface, and through-hole PDIP package make it especially attractive for legacy retrofits and for evaluation/prototyping boards where socketed parts simplify rework. When designing with the MAX181BCPL, ensure adequate decoupling on both AVDD and DVDD rails and verify that the input signal source impedance is below the datasheet's recommended maximum to maintain 12-bit accuracy. The through-hole PDIP footprint also simplifies hand-soldered prototypes and field replacements. This page synthesizes distributor pricing for MAX181BCPL, drop-in PDIP-40 alternatives from the same Maxim MAX181 family, and design notes not collected in a single place elsewhere - giving procurement, design, and component-engineering teams a single reference for evaluating the part.
MAX181BCQH-D - 12-Bit 100ksps 6-Channel ADC | Analog Devices
The Analog Devices MAX181BCQH-D is a complete, 12-bit, 100ksps, 6-channel data acquisition system built around a successive-approximation ADC with integrated sample/hold and a configurable 6-input analog multiplexer, housed in a 44-pin PLCC (QCCJ) surface-mount package. A successive-approximation register (SAR) analog-to-digital converter (ADC) is a converter architecture that performs one bit per internal clock cycle using a comparator and a switched-capacitor DAC. Compared with flash or pipeline ADCs, SAR ADCs offer an attractive trade-off between sampling rate, resolution, and power consumption for industrial control, instrumentation, and process automation applications. SAR ADCs sit within the broader data-converter hierarchy: ADC -> data converter -> data acquisition IC -> signal-chain component -> semiconductor. Key features of the MAX181BCQH-D include 100 ksps throughput, 12-bit resolution, 6 single-ended or pseudo-differential input channels, an integrated track-and-hold amplifier, software-configurable input ranges, and a parallel microprocessor interface. The architecture is optimized for high-impedance sources, eliminating the need for an external buffer amplifier in many applications. The part is specified over the commercial (0 to +70 °C) temperature grade, and the "-D" suffix denotes a tape-and-reel shipping format per Analog Devices ordering nomenclature. Typical applications include multi-channel analog signal monitoring, transducer interfacing, industrial process control, dataloggers, and embedded instrumentation front-ends. The combination of 6 channels and 100 ksps makes the MAX181BCQH-D well suited for scanning multiple sensor signals sequentially without external multiplexing logic. When designing with this part, attention must be paid to the analog input bandwidth, reference decoupling, and PCB layout for ground isolation between analog and digital domains. The on-chip reference and software-programmable input ranges simplify BOM, but the part must be paired with a low-noise front-end for best DC accuracy.
MAX181CCPL - 12-Bit 8-Ch 100ksps DAS | Maxim Integrated
The Maxim Integrated MAX181CCPL is a complete 8-channel, 12-bit data-acquisition system (DAS) housed in a 40-pin PDIP (Plastic DIP) through-hole package. It integrates a successive-approximation analog-to-digital converter, 8 analog input channels, a track/hold amplifier, and an on-chip reference, delivering up to 100 ksps throughput from a single +5 V supply. The 'CC' grade operates over the commercial 0°C to +70°C temperature range, and the parallel word-access interface simplifies connection to 8-bit and 16-bit microprocessors or microcontrollers. What is a Data-Acquisition System? A DAS is a mixed-signal integrated circuit that combines an analog front end (multiplexer, sample-and-hold, and ADC) with digital control logic in a single chip, replacing the discrete ADC-plus-mux-plus-reference designs of the past. Within the broader converter hierarchy, a DAS sits above stand-alone ADCs and below full system-on-chip solutions; MAX181-class devices belong to the successive-approximation register (SAR) ADC family, prized for deterministic latency and ease of microprocessor interfacing. By integrating the reference and analog switches, Maxim's DAS parts reduce board area, lower BOM cost, and remove the burden of matching discrete analog stages. Key features of the MAX181CCPL include 12-bit resolution with ±½ LSB linearity (typical), an on-chip 5 V reference (with external override option), software-configurable unipolar/bipolar input ranges (0 V to 5 V or ±5 V / ±10 V / 0 V to 10 V depending on external scaling), and a hardware-mode or software-mode channel scan sequencer. The device also offers an interrupt output at end-of-conversion, low power dissipation (~75 mW typical at 100 ksps), and single +5 V operation. The 40-pin PDIP footprint remains compatible with legacy through-hole test fixtures and breadboard prototypes. Architecturally, the MAX181CCPL uses a charge-redistribution successive-approximation ADC core with a capacitive DAC, which provides inherent sample-and-hold action and eliminates the need for an external SHA. The on-chip precision reference is laser-trimmed at the factory, and an external reference pin allows system designers to substitute higher-accuracy or ratiometric references when required. The parallel interface supports either 8-bit (two read cycles) or 16-bit (single read) data transfer, with chip-select and read-strobe handshaking that map directly to 8051, 68HC11, and similar MCU buses. Typical applications include industrial process-control front ends, multi-channel data loggers, instrumentation front panels, and portable test equipment. The 8-channel count suits it for monitoring thermocouple banks, RTD arrays, strain-gauge bridges, and 4 mA to 20 mA current-loop sensors. Designers also use the MAX181CCPL in legacy microprocessor-based factory automation cards where a parallel-bus ADC eliminates the need for an SPI/QSPI peripheral. When designing with the MAX181CCPL, pay attention to analog-input protection: the analog inputs can be damaged by overvoltage transients, so series resistors and clamping diodes networks are recommended for industrial applications. Also, because the part uses a successive-approximation core, the analog input must remain stable during the conversion window (typically 8 µs to 10 µs); if the source impedance is too high, add an external buffer to avoid conversion errors. This page synthesizes distributor pricing, drop-in Maxim Integrated alternatives, and practical design notes not found in the manufacturer datasheet alone.
MAX181CEQH-D - 12-Bit 100ksps 8-Ch DAS ADC | Maxim Integrated
The Maxim Integrated MAX181CEQH-D is a complete 12-bit, 100 ksps, 8-channel data-acquisition system (DAS) housed in a 44-pin PLCC (J-Lead, 16.59x16.59 mm) surface-mount package. It integrates an 8-input multiplexer, a high-bandwidth track/hold amplifier, a successive-approximation ADC, plus programmable I/O registers and a parallel microprocessor interface on a single die. The -D suffix indicates the dry-pack shipping option, while the underlying MAX181 silicon operates from a single +5 V supply and a -5 V reference. According to Maxim datasheet summaries, the part delivers 100 ksps throughput with 12-bit resolution and is specified for the industrial temperature grade. A Data Acquisition System (DAS) of this type is a category of mixed-signal IC that combines analog signal conditioning, channel multiplexing, and a single ADC to support multi-channel measurement from a shared converter. The MAX181 belongs to the broader SAR (Successive Approximation Register) ADC family, which trades absolute speed for high resolution (12+ bits), low power consumption, and ease of system integration. Within the data-converter hierarchy, the DAS sits above a bare multiplexer plus ADC pair, reducing board area, timing complexity, and component count versus discrete architectures; this is why older industrial and instrumentation designs relied on it heavily. Differentiating features include 8 single-ended or 4 differential analog inputs selectable through on-chip registers, a software-controlled programmable gain stage, internal clock generation, and a parallel interface that maps cleanly onto 80C31/68HC11, 8088/80186, and similar microcontrollers. The successive-approximation architecture guarantees no missing codes at the 12-bit level and provides low aperture uncertainty that is suitable for multiplexed transducer scanning. Internal registers let the host independently configure input range, channel selection, and conversion-trigger source without external glue logic. The conversion engine uses a charge-redistribution DAC array with a thin-film ladder trimmed at the factory, yielding typical integral nonlinearity of ±0.5 LSB and a track/hold capable of sustaining the 100 ksps rate even on full-scale input transitions. Reference decoupling is single-supply: the device accepts a unipolar or bipolar analog input range tied to VREF; a typical 4.096 V reference supports the part's nominal 0-5 V input span, which matches many transducer bridges, thermocouples, and 4-20 mA current loops once scaling. Internal sequencing reduces CPU overhead - the host initiates one conversion and reads the result on interrupt. Typical applications include industrial process control and SCADA front-ends, multi-channel data loggers, weigh scales and load-cell instrumentation, factory automation analog input modules, automotive sensor interfaces, and medical patient-monitoring front ends. Anywhere a small-form-factor mixed-signal board needs to digitize 4-8 analog channels without paying for a full 16-bit pipeline ADC, the MAX181 series remains a viable solution - especially where component traceability and a single-IC footprint simplify certification. A key design tip: keep the AGND/DGND ground return short and provide a 0.1 µF ceramic bypass capacitor within 5 mm of each supply pin, plus a 10 µF tantalum bulk capacitor on VDD. The 44-PLCC socket footprint allows hand-rework with a PLCC extraction tool - one reason this part is still seen in legacy test fixtures and avionics repair lines. This page synthesizes distributor pricing tiers, parametric drop-in alternatives (including automotive-grade MAX181BCQH-D variants), and practical design notes that supplement the manufacturer datasheet for engineers sourcing legacy Maxim DAS parts.
MAX182BCPI - 12-Bit 4-Ch SAR ADC w/ T/H and Reference | Maxim
The Maxim Integrated MAX182BCPI is a calibrated, 4-channel, 12-bit successive-approximation analog-to-digital converter (ADC) with an integrated track-and-hold amplifier and a precision on-chip voltage reference, housed in a 28-pin PDIP through-hole package. It delivers up to 17 ksps throughput across 4 single-ended or 2 differential analog input channels, while internal calibration circuitry maintains true 12-bit performance over the full commercial operating temperature range (0C to +70C) without external trims. An ADC (analog-to-digital converter) is a data-conversion integrated circuit that transforms continuous analog voltage signals at its inputs into discrete digital codes at its output, enabling microcontrollers, DSPs, or FPGAs to process real-world sensor signals. Successive-approximation-register (SAR) ADCs use a binary-search algorithm with an internal DAC and comparator to resolve N bits in N clock cycles, trading conversion speed for excellent DC accuracy, low latency, and very low power consumption - making SAR ADCs the dominant topology for industrial process control, instrumentation, and multichannel data-acquisition systems. Key features of the MAX182BCPI include an internal 2.5 V bandgap reference (with a REFADJ pin for external trim), a track-and-hold with 1.5 MHz full-power bandwidth, a parallel microprocessor interface, hard-wired channel sequencing or software-programmable channel selection, and single +5 V supply operation. The part draws approximately 4 mA active supply current and powers down to microamp-level standby between conversions, simplifying battery and portable designs. Internal autocalibration of linearity and offset runs at power-up and on demand via the CAL pin, eliminating periodic user adjustment. Typical applications include multichannel process-control data acquisition boards, portable or rack-mounted industrial instrumentation, sensor-signal conditioning front-ends, and embedded microprocessor analog I/O modules where the integrated reference and track-and-hold reduce external bill-of-materials cost and PCB area compared with discrete ADC + reference designs. When designing with this device, place 0.1 uF ceramic bypass capacitors close to the supply and reference pins, drive analog inputs through low-impedance buffers, and avoid routing digital lines under the analog input traces to preserve 12-bit noise performance.
MAX182BCWI - 12-Bit 4-Ch 17ksps ADC with T/H & Reference | Maxim
The Maxim Integrated MAX182BCWI is a calibrated 12-bit, 4-channel analog-to-digital converter (ADC) with a track-and-hold amplifier and an internal 4.096V bandgap reference, offered in a 28-pin wide-body SOIC package. It performs successive-approximation conversions at up to 17 ksps across four single-ended or two differential analog input channels, with software-configurable unipolar or bipolar input ranges of 0 to +5V, 0 to +10V, +/-5V, or +/-10V. An ADC (Analog-to-Digital Converter) is a data-acquisition component that translates real-world continuous analog signals into discrete digital codes readable by a microcontroller, DSP, or processor. In the broader signal-chain hierarchy, the ADC sits between analog front-end conditioning (amplifiers, multiplexers, sensors) and digital processing; multi-channel ADCs like the MAX182 integrate channel switching, sample-and-hold, and reference, replacing a discrete implementation that would otherwise require a separate MUX, T/H, and reference IC. The MAX182 series uses successive-approximation register (SAR) architecture, which provides deterministic latency per conversion ideal for multiplexed data-acquisition systems. Key features include 17 ksps throughput, a 4.096V internal reference, software-configurable input ranges, on-chip calibration, a track-and-hold amplifier, and a parallel microprocessor interface. The integrated 4.096V reference simplifies analog input scaling for 0-5V or +/-5V ranges by providing 1 LSB = 1 mV resolution when the inputs are configured for unity-gain operation. Typical applications include industrial process-control data-acquisition systems, multi-loop programmable logic controllers (PLCs), analog I/O cards for PC-based measurement, and precision sensor signal digitisation. Designers select the MAX182 for its combination of integrated reference, multi-channel switching, and parallel interface that simplifies firmware handshaking. When designing with the MAX182BCWI, carefully review the input-channel protection and reference-bypass capacitor selection for noise immunity. Connect AGND and DGND with a low-impedance star ground near the IC, and add a 10 uF tantalum plus 0.1 uF ceramic bypass capacitor directly on the REF pin. This page synthesises distributor availability, drop-in pin-compatible alternatives, and practical PCB design guidance for the MAX182BCWI that are not found in the manufacturer datasheet alone.
MAX184BC/D - 12-Bit High-Speed ADC w/ External Ref | Maxim Integrated
The Maxim Integrated MAX184BC/D (now supplied by Analog Devices / Maxim Integrated) is a 12-bit high-speed successive-approximation analog-to-digital converter (ADC) supplied in an un-packaged bare die (DIE) form factor with 24 die terminals. It features an external reference input, industrial-commercial temperature grade, and single +5 V nominal supply with optional -12 V/-15 V supplies for bipolar input ranges. An SAR (Successive Approximation Register) ADC is a type of data converter that performs a binary search through an internal capacitive DAC to produce a digital output in N clock cycles for an N-bit conversion. SAR ADCs sit in the broader hierarchy: ADC -> data converter -> mixed-signal IC -> semiconductor. Unlike flash ADCs, SARs trade speed for power efficiency and DC accuracy, while unlike delta-sigma ADCs, they offer low-latency conversions ideal for multiplexed acquisition. Key features include 12-bit resolution, external reference voltage for ratiometric or absolute measurements, and tracking/hold functionality on the analog front end. The device is well suited for high-accuracy instrumentation with compact PCB area because the bare-die format eliminates package parasitics and reduces footprint versus packaged SOIC or PDIP equivalents. Per the Maxim datasheet, the converter supports standard microprocessor interfaces, simplifying connection to MCUs and DSPs. Architecturally, the MAX184BC/D uses a charge-redistribution DAC array combined with a low-noise comparator and successive-approximation register. The external reference pin allows system designers to scale the analog input range independently of the supply rail, which is essential when digitizing signals from sensors whose full-scale output is far below +5 V. Internal clock-generation logic controls sample timing so that an external trigger is not strictly required. Typical applications include industrial process control data acquisition boards, precision sensor front ends (load cells, pressure transducers), motor control feedback sampling, multi-channel data loggers, and digital oscilloscope front-end digitizers. The wide operating temperature range supports harsh industrial environments including factory automation and motor drive systems. When designing with this part, ensure the reference bypass capacitors are placed close to the REF pin and that the analog input is well buffered; SAR ADCs present a switched-capacitive load at the input and are sensitive to source-impedance induced gain error. Designers should also budget for the bare-die assembly process including die attach, wire bonding, and an appropriate ceramic or metal package. This page synthesizes distributor pricing, packaged alternatives, and practical design notes for the MAX184BC/D not found in the original Maxim datasheet - useful for engineers weighing bare-die vs packaged ADC trade-offs.
MAX186ACPP - 12-Bit 8-Ch 133kHz Serial ADC | Maxim/Analog Devices
The Maxim Integrated MAX186ACPP is a low-power, 8-channel, 12-bit serial-output analog-to-digital converter (ADC) housed in a 20-pin PDIP (through-hole) package. It integrates an 8-channel analog multiplexer, a wide-bandwidth track-and-hold amplifier, a successive-approximation ADC, an internal 4.096 V reference, and an SPI/QSPI/MICROWIRE-compatible serial interface. The device operates from a single +5 V supply (or ±5 V analog input range) and supports up to 133 kHz sampling rate with internal 4.096 V reference (MAX186) or external reference option (MAX188). A Data Acquisition System (DAS) is an integrated analog front-end that combines multiplexing, sample-and-hold, and ADC functionality in a single chip, eliminating the need for external analog signal conditioning. DAS devices sit at the analog boundary of mixed-signal systems, feeding the host microcontroller's digital domain. The MAX186ACPP belongs to the successive-approximation-register (SAR) ADC family - the workhorse architecture for multiplexed multi-channel data acquisition in industrial, instrumentation, and process-control applications. Key differentiating specifications include: 133 kHz maximum sampling rate, 1.5 mA operating supply current, 2 µA power-down current, internal 4.096 V reference, 8 single-ended or 4 differential input channels, and ±5 V true bipolar analog input range. The serial interface reduces pin count and simplifies isolated or distributed data acquisition layouts, while the 12-bit resolution delivers 1 LSB = 1 mV at the 4.096 V full-scale reference. The MAX186 uses a capacitive charge-redistribution SAR architecture with an on-chip calibration logic that corrects internal capacitor mismatch each conversion. The internal reference can be overridden by an external reference voltage applied to the REF pin, enabling ratiometric measurements where the excitation source doubles as the reference. The SHDN pin reduces quiescent current to 2 µA for battery-powered portable applications. Typical applications include process control and industrial automation, portable data loggers, battery-powered instrumentation, isolated data acquisition front-ends, panel meters, and multi-sensor embedded systems. The 8-channel mux eliminates external analog switches for typical multi-channel transducer monitoring. When designing with this device, place 0.1 µF bypass capacitors close to the supply pins and a 4.7 µF tantalum capacitor on the REF pin. The serial clock and chip-select traces should be kept short to avoid digital coupling into the analog inputs. For 50/60 Hz noise rejection, use averaging or synchronized sampling at integer multiples of the line frequency. This page synthesizes distributor pricing, drop-in same-package alternatives, and practical PCB layout guidance not found in the manufacturer datasheet alone.
MAX187BC/D - 12-Bit Serial SAR ADC, +5V, Die Form | Maxim Integrated
The Maxim Integrated (Analog Devices) MAX187BC/D is a +5V, low-power, 12-bit successive-approximation analog-to-digital converter (ADC) supplied in unpackaged die form (Package Code: DIE, 8 terminals). It accepts a 0V to 5V analog input, integrates an internal track/hold with 1.5 us acquisition time, an on-chip clock, an internal 4.096V buffered reference, and a high-speed 3-wire SPI/QSPI/MICROWIRE-compatible serial interface. The /D suffix designates bare-die delivery, intended for hybrid/MCM integration rather than conventional PCB soldering. A successive-approximation register (SAR) ADC is a converter architecture that performs a binary search against the analog input using an internal DAC and comparator, producing one bit per clock cycle. SAR ADCs are favored for medium-speed (kHz to low-MHz), low-latency, deterministic conversion because there is no pipeline delay - the result is valid exactly N+1 clock cycles after the CONVST edge. In the broader data-converter hierarchy, SAR ADCs sit between flash converters (fastest, highest power) and sigma-delta converters (highest resolution, lowest bandwidth); the MAX187BC/D targets instrumentation and process-control bandwidths. Key specifications include 12-bit resolution, 75 kHz sampling rate, +/-1/2 LSB integral nonlinearity (A-grade), 1.5 mA operating supply current, 2 uA shutdown current, and 7.5 mW typical power dissipation. The internal 4.096V buffered reference provides a stable, low-impedance reference without an external buffer, simplifying BOM and PCB area. The serial interface runs to SPI/QSPI/MICROWIRE peripherals on microcontrollers and DSPs without glue logic. Architecture-wise, the MAX187BC/D combines a capacitive DAC, a high-bandwidth track/hold, and a precision on-chip reference with factory trimming. The internal clock eliminates the need for an external ADC clock source, and the hardware SHUTDOWN pin reduces quiescent current to microampere levels for battery-powered designs. Typical applications include portable instrumentation, process-control data acquisition, pen-digitizers, battery-powered data loggers, isolated sensor front ends, and precision weighing scales where small PCB footprint and low power matter. The die format suits hybrid microcircuits and chip-on-board modules. Industrial temperature grades (C suffix, 0C to +70C) cover commercial environments. A primary design consideration with die-format parts is packaging and wire-bonding: the MAX187BC/D requires assembly onto a substrate or package with gold or aluminum wire bonds and hermetic/encapsulation protection. For PCB designs, designers typically select the pin-equivalent MAX187BCPA+ (PDIP-8) or MAX187BCWE+ (SOIC-16 wide). Designers should provide adequate input bypass (0.1 uF close to VDD) and a low-impedance analog ground return to preserve 12-bit linearity. This page synthesizes distributor pricing, drop-in package alternatives, and die-level design guidance that goes beyond the manufacturer datasheet. Engineers evaluating MAX187BC/D should treat the bare-die option as a hybrid-assembly component and weigh the BOM savings of internal reference and clock against the assembly complexity.
MAX187BCPA - 12-Bit 75ksps Serial ADC + 5V | Maxim/ADI
The Maxim Integrated (Analog Devices) MAX187BCPA is a 12-bit, 75 ksps, low-power, single +5V serial-interface analog-to-digital converter housed in an 8-pin PDIP package. The part combines a successive-approximation register (SAR) ADC core with a fast 1.5 µs track/hold, an internal 4.096 V buffered reference (MAX187 family), an on-chip clock, and a high-speed SPI/QSPI/MICROWIRE-compatible 3-wire serial interface, all in a compact through-hole 8-DIP footprint. A successive-approximation ADC (SAR ADC) is a type of data converter that uses a binary-search algorithm against an internal DAC to determine each digital output code. SAR ADCs are valued for deterministic latency, excellent DC linearity, and low power consumption relative to their throughput, which makes them the dominant choice for multiplexed data-acquisition systems, instrumentation, and process-control front-ends. The MAX187 sits in the product hierarchy of analog-to-digital converter -> data converter -> signal chain IC -> semiconductor. Key specifications include 12-bit resolution with ±½ LSB integral nonlinearity (MAX187A grade) or ±1 LSB (MAX187B/MAX187C grades), 75 kHz throughput, 8.5 µs successive-approximation conversion time, 1.5 µs acquisition time, single +5V operation, 1.5 mA operating current, 2 µA shutdown current, and 7.5 mW typical power dissipation reducing to 10 µW in shutdown. The 8-pin DIP pinout provides VDD, GND, VREF (4.096 V buffered), AIN, SCLK, DOUT, CS, and SHDN functions, all conveniently on a 0.300 inch (7.62 mm) through-hole lead pitch. The MAX187BCPA uses a charge-redistribution SAR architecture with an input track/hold and a laser-trimmed internal reference, achieving AC performance (SINAD and THD) suitable for instrumentation-grade measurements. The MAX187 differs from the pin-compatible MAX189 in that MAX187 integrates a 4.096 V buffered reference while MAX189 requires an external reference, so selection between the two depends on absolute-accuracy vs flexible-reference design priorities. Typical application areas include portable data loggers, industrial process-control analog input modules, weigh scales and strain-gauge digitizers, panel meters, isolated 4-20 mA loop read-back, and battery-powered instrumentation. The 75 ksps throughput and 5V-only operation are well-matched to multiplexing multiple slow analog channels in 12-bit precision systems. When designing with the MAX187BCPA, ensure the input source impedance is below approximately 1 kΩ to avoid ADC droop errors during the 1.5 µs acquisition window, and tie CS high between conversions to keep the device in shutdown and minimize power. A 0.1 µF decoupling capacitor placed within 5 mm of the VDD pin is required, and the internal reference should be bypassed with at least 4.7 µF at VREF to filter reference noise. This page consolidates distributor pricing, parametric drop-in alternatives in the same 8-DIP footprint, and practical design notes from the official Maxim datasheet to help engineers evaluate the MAX187BCPA against modern 12-bit ADC alternatives.
MAX187BEPA - 12-Bit Serial ADC, +5V, 75ksps | Maxim Integrated
The Maxim Integrated MAX187BEPA is a 12-bit, low-power, serial-interface analog-to-digital converter (ADC) operating from a single +5V supply with a 75 kHz (8.5 µs conversion) successive-approximation architecture, housed in an 8-pin PDIP (through-hole) package. An ADC is a mixed-signal integrated circuit that converts a continuous analog voltage into a discrete digital code. The MAX187 sits in the successive-approximation register (SAR) ADC family - which combines a sample-and-hold front end, an internal DAC, and a comparator running a binary-search algorithm - offering a favorable trade-off between speed and accuracy for low-bandwidth instrumentation. As part of the broader data-converter hierarchy, the SAR ADC falls between high-speed flash converters (>100 MSPS) and high-resolution sigma-delta converters (>16 bits), making the MAX187 well suited to industrial control loops, panel meters, and portable data-acquisition front ends where single +5V supply operation simplifies power design. Key features include ±1/2 LSB integral nonlinearity (MAX187A/B grade), 1.5 µs acquisition-time track-and-hold, internal 4.096 V buffered reference (no external reference required), 3-wire SPI/QSPI/MICROWIRE-compatible serial interface, 1.5 mA typical operating current, and a 2 µA power-down shutdown mode. The 8-pin PDIP package (suffix E) supports breadboard-friendly through-hole prototyping and is the standard format for the B-temperature-grade (-40 °C to +85 °C) industrial variant. The MAX187 internal architecture combines an on-chip clock, a sample/hold amplifier, an internal reference buffer, and a digital serial output stage in a single die. Its true-differential analog input stage accepts a 0 V to 5 V unipolar range, while the internal 4.096 V reference and 12-bit resolution yield a 1 mV per LSB step size ideal for transducer digitisation. Typical applications include portable data loggers, industrial process control, isolated front-end signal conditioning with opto-isolated serial interfaces, battery-powered instrumentation, and panel-meter digitiser circuits. Designers select the MAX187 when board area is constrained, an external reference must be avoided, and a 3-wire serial interface to a microcontroller is sufficient. When designing with the MAX187, place the supply bypass capacitor (10 µF electrolytic plus 0.1 µF ceramic) within 5 mm of the VDD pin, keep the analog input traces short and guarded by ground, and observe the 8.5 µs minimum conversion time. The MAX187 differs from the pin-compatible MAX189 only in reference topology: the MAX187 integrates the 4.096 V reference, while the MAX189 requires an external reference. The MAX187 also differs from the MAX187A (tighter linearity) and MAX187C (commercial grade) only in linearity spec and temperature range, all of which share the 8-pin PDIP footprint. This page synthesises distributor pricing, drop-in 8-pin PDIP alternatives drawn from the same Maxim MAX187 family, and practical design notes not found in the manufacturer datasheet alone, providing engineers a single decision-ready resource.
MAX187BEWE - 12-Bit 75ksps +5V Serial ADC | Maxim Integrated
The Maxim Integrated MAX187BEWE is a +5V, low-power, 12-bit successive-approximation analog-to-digital converter (SAR ADC) with a 75 ksps throughput rate, an internal 4.096 V buffered reference, and a 3-wire SPI/QSPI/MICROWIRE-compatible serial interface, packaged in a 16-pin WSOIC (wide-body SOIC). It accepts a 0V to 5V analog input range, integrates a 1.5 us track-and-hold, and draws only 1.5 mA operating current with a 2 uA shutdown mode for battery-friendly designs. A SAR ADC is a successive-approximation-register analog-to-digital converter that resolves one bit per clock cycle using a comparator, a DAC, and a binary-search register, trading conversion speed for excellent static accuracy and very low power consumption. In a typical signal chain, the SAR ADC sits between the analog front end (sensor + signal conditioning) and the digital controller (microcontroller, FPGA, DSP), translating real-world analog signals into 12-bit digital codes that downstream firmware can process. The MAX187's wide-SOIC pinout, internal reference, and serial interface made it a workhorse ADC of the 1990s and 2000s for industrial, instrumentation, and data-acquisition designs. Key differentiating features include 12-bit resolution with ±1/2 LSB integral nonlinearity (INL) on the B-grade, internal 4.096 V reference (MAX187 only; MAX189 requires external reference), single +5V supply operation, hardware- or software-controlled shutdown, and a high-speed 3-wire serial interface that simplifies opto-isolation in noisy industrial environments. Compared to the older MAX176/MAX186 family, the MAX187 reduces operating current and adds an internal reference, simplifying BOM cost. Typical applications include portable data loggers, battery-powered instrumentation, isolated sensor front ends using SPI over optocouplers, process-control analog I/O modules, panel meters, and pen/strain-gauge digitizers. The 75 ksps rate covers most 4-20 mA loop, RTD, thermocouple, and general-purpose instrumentation sampling needs while the 2 uA shutdown extends battery life in handheld meters. A critical design consideration is bypassing: place a 0.1 uF ceramic capacitor close to VDD and a 4.7 uF tantalum/ceramic at REF, plus a 0.01 uF ceramic at the analog input pin to minimize conversion noise. The serial interface supports SPI modes CPOL=0/CPHA=0 and CPOL=1/CPHA=1, but the MAX187 requires a minimum SCLK period of 130 ns (max 7.6 MHz external clock) when using an external serial clock. This page synthesizes distributor pricing, same-brand and cross-brand drop-in alternatives, and practical design notes not found in the manufacturer datasheet, giving engineers a single source for parametric comparison and PCB-compatible substitution.