Analog Devices Inc./Maxim Integrated MAX172BCWG

Overview

MAX172BCWG from Maxim Integrated is a 12-bit successive-approximation analog-to-digital converter (ADC) with internal track/hold, reference, and clock. It operates from a single +5V supply, achieves 100ksps sampling rate, and features ±1/2 LSB integral nonlinearity. It is used in data acquisition systems requiring high-speed, medium-resolution digitization of analog sensor signals.

For engineers reviewing the MAX172BCWG datasheet, MAX172BCWG pinout, MAX172BCWG application, or MAX172BCWG equivalent, key selection criteria include its 12-bit resolution, 100ksps throughput, single-supply operation, internal reference accuracy, and SOIC-24 package compatibility with industrial signal conditioning designs.

Technical Context

The MAX172BCWG employs a successive-approximation register (SAR) architecture with an integrated sample-and-hold amplifier, eliminating external hold circuitry. Its internal 2.5V reference exhibits ±0.5% initial accuracy and 25ppm/°C temperature drift.

It supports parallel 12-bit digital output with TTL/CMOS-compatible drivers and uses a standard CONVST control signal to initiate conversion. The device meets MIL-STD-883 Class B screening for reliability-critical applications.

Key Specifications

Pinout & Package

MAX172BCWG is housed in a 24-pin SOIC (Small Outline Integrated Circuit) package with 300-mil body width and gull-wing leads. Pin spacing is 0.025 inches, and the package complies with JEDEC MS-013AC.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 12-bit SAR ADC applications.

Compared with AD7892BRZ-1 and ADS7822U, the MAX172BCWG uniquely integrates reference and track/hold while maintaining 100ksps throughput and SOIC-24 compatibility-reducing total solution size and simplifying analog front-end design for industrial and avionics signal chains.

Availability

MAX172BCWG is available at Aetrix Electronics and suitable for industrial data acquisition, avionics sensor interfaces, and medical instrumentation requiring stable component supply and long-term lifecycle support.

Supply support for MAX172BCWG includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Maxim Integrated (now part of Analog Devices) designs precision analog, mixed-signal, and power management ICs for industrial, automotive, and communications applications.

The MAX172BCWG belongs to Maxim's legacy high-speed data converter family, engineered for embedded systems needing self-contained, single-supply 12-bit digitization with military-grade reliability.

FAQ

What is the maximum sampling rate supported by the MAX172BCWG?

The MAX172BCWG supports a maximum sampling rate of 100ksps. This throughput is guaranteed across the full operating temperature range (–55°C to +125°C) and with the internal reference enabled. At this rate, the device maintains its specified ±1/2 LSB integral nonlinearity and 12-bit resolution without performance degradation.

Does the MAX172BCWG require an external reference voltage?

No, the MAX172BCWG does not require an external reference voltage. It includes an internal 2.5V reference with ±0.5% initial accuracy and 25ppm/°C temperature coefficient. The REF pin can be overdriven externally if a custom reference is needed, but default operation uses the internal source.

What package type is used for the MAX172BCWG?

The MAX172BCWG is packaged in a 24-pin SOIC (Small Outline Integrated Circuit) with 300-mil body width. This JEDEC MS-013AC-compliant package features gull-wing leads, 0.025-inch pitch, and is compatible with standard surface-mount assembly processes.

Is the MAX172BCWG suitable for use in extended temperature environments?

Yes, the MAX172BCWG is screened to MIL-STD-883 Class B, qualifying it for operation from –55°C to +125°C. This makes the MAX172BCWG appropriate for aerospace, defense, and industrial applications where extreme thermal stability and reliability are mandatory.

How is the conversion process initiated on the MAX172BCWG?

Conversion on the MAX172BCWG is initiated by a rising edge on the CONVST (Convert Start) pin. This signal triggers the internal track/hold to switch from sample mode to hold mode and begins the successive-approximation conversion cycle. The conversion completes within 10µs, after which the result is available on the DB0–DB11 bus when OE is asserted.