Analog Devices Inc./Maxim Integrated MAX166DCWP

Overview

MAX166DCWP from Maxim Integrated is a 12-bit, 100ksps successive-approximation analog-to-digital converter (ADC) with internal reference and parallel interface in a 28-pin SOIC package. It operates from a single +5V supply, features ±1 LSB integral nonlinearity, and supports unipolar 0V to +4.096V input range - used in industrial data acquisition systems requiring high accuracy and moderate speed.

For engineers reviewing the MAX166DCWP datasheet, MAX166DCWP pinout, MAX166DCWP application, or MAX166DCWP equivalent, key selection criteria include sampling rate, INL/DNL performance, reference integration, parallel interface timing, and SOIC-28 thermal and layout compatibility.

Technical Context

The MAX166DCWP employs a successive-approximation register (SAR) architecture with internal 4.096V bandgap reference and on-chip track/hold amplifier. It delivers 12-bit resolution without missing codes over temperature and supports conversion times of 10μs max.

Its parallel 8-bit data bus outputs MSB-aligned binary words synchronized to /RD and /CS control signals. The device requires no external clock for conversion initiation - start is triggered by falling edge on /CONV.

Key Specifications

Pinout & Package

MAX166DCWP is housed in a 28-pin wide-body SOIC (SO28W) package with standard 0.3-inch body width and 1.27mm pitch. Thermal resistance θ_JA is 80°C/W.

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 MAX166DCWP uniquely integrates both reference and parallel interface in a single +5V SOIC-28 package - reducing external components and simplifying timing-critical parallel bus interfacing without sacrificing 12-bit accuracy.

Availability

MAX166DCWP is available at Aetrix Electronics and suitable for industrial process monitoring, motor control feedback, and test equipment requiring stable component supply and long-term manufacturability.

Supply support for MAX166DCWP 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, medical, and communications applications.

The MAX166DCWP belongs to Maxim's legacy high-accuracy data acquisition ADC family, engineered for systems demanding guaranteed monotonicity, integrated references, and deterministic parallel-interface timing in harsh environments.

FAQ

What is the maximum sampling rate supported by the MAX166DCWP?

The MAX166DCWP supports a maximum sampling rate of 100 kSPS. This is achieved with a maximum conversion time of 10 μs per sample, enabling real-time acquisition of signals with bandwidths up to approximately 40 kHz. The MAX166DCWP maintains full 12-bit accuracy and ±1 LSB INL at this rate across its specified temperature range.

Does the MAX166DCWP require an external reference voltage?

No, the MAX166DCWP includes a precision internal 4.096V bandgap reference. This eliminates the need for external reference components and associated decoupling, reducing system cost and board area. The MAX166DCWP can operate with full specification compliance using only its internal reference - no external reference connection is required or supported.

What interface type does the MAX166DCWP use for data output?

The MAX166DCWP uses an 8-bit parallel interface with control signals /CS, /RD, and /CONV. Data is output MSB-first on D7–D0, with D7 as the most significant bit of the 12-bit result. The MAX166DCWP does not support serial interfaces such as SPI or I²C - its parallel bus is optimized for direct connection to microcontroller or FPGA data buses.

What is the operating temperature range of the MAX166DCWP?

The MAX166DCWP is specified for operation from −40°C to +85°C. Over this industrial temperature range, it guarantees no missing codes, ±1 LSB integral nonlinearity, and full functionality of all timing parameters including 10 μs max conversion time. The MAX166DCWP's SOIC-28 package provides reliable thermal performance under continuous industrial ambient conditions.

Is the MAX166DCWP pin-compatible with other Maxim ADCs like the MAX167 or MAX168?

No, the MAX166DCWP is not pin-compatible with the MAX167 or MAX168. While all three belong to the same functional family, they differ in pin count, package type, and signal assignment. The MAX166DCWP uses a 28-pin SOIC package with specific /CONV and parallel bus pinout; the MAX167 and MAX168 use different packages and interface configurations. Board-level replacement requires redesign for the MAX166DCWP.