Analog Devices Inc./Maxim Integrated MAX165BCWN+

Overview

MAX165BCWN+ from Maxim Integrated is a 12-bit, 100ksps successive-approximation analog-to-digital converter (SAR 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 (INL), and supports unipolar 0V to +4.096V input range. It is used in data acquisition systems requiring medium-speed precision digitization.

For engineers reviewing the MAX165BCWN+ datasheet, MAX165BCWN+ pinout, MAX165BCWN+ application, or MAX165BCWN+ equivalent, key selection considerations include its 12-bit resolution, 100ksps throughput, internal 4.096V reference, parallel byte-wide interface, and SOIC-28 thermal performance for industrial signal conditioning.

Technical Context

The MAX165BCWN+ implements a SAR architecture with a built-in track-and-hold amplifier and 4.096V bandgap reference. Conversion is initiated by WR pulse and completed within 10µs, with BUSY output indicating status. The parallel interface outputs data on D0–D11 with separate high/low byte strobes (HBEN/LBEN).

It requires no external clock for conversion control-timing is governed by WR and RD pulses. Input sampling occurs on the falling edge of WR, and data is latched on the rising edge of RD. The device guarantees monotonicity and meets ±1 LSB differential nonlinearity (DNL) over temperature.

Key Specifications

Pinout & Package

MAX165BCWN+ is housed in a 28-pin wide-body SOIC (SO28W) package with 300-mil body width and gull-wing leads. Pin 1 is marked with a notch or dot; pin numbering follows standard counter-clockwise convention.

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 MAX165BCWN+ uniquely integrates a stable 4.096V reference and supports parallel byte-wide access on a single +5V rail-reducing external components and simplifying timing-critical firmware integration in industrial DAQ modules.

Availability

MAX165BCWN+ is available at Aetrix Electronics and suitable for industrial data acquisition, test equipment, and medical instrumentation requiring stable component supply and long-term manufacturability.

Supply support for MAX165BCWN+ 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 MAX165BCWN+ belongs to Maxim's precision data acquisition ADC family, engineered for medium-speed, high-accuracy digitization in space- and power-constrained embedded systems.

FAQ

What is the operating temperature range specified for the MAX165BCWN+?

The MAX165BCWN+ is rated for operation from 0°C to +70°C ambient temperature. This commercial-grade specification aligns with its SOIC packaging and internal trimming for stability across that range. The MAX165BCWN+ maintains ±1 LSB INL and DNL performance throughout this interval, making it suitable for indoor industrial and benchtop equipment where environmental extremes are controlled.

Does the MAX165BCWN+ require an external clock source to perform conversions?

No, the MAX165BCWN+ does not require an external clock. Conversion timing is fully controlled by the WR (write) and RD (read) strobe signals. A falling edge on WR initiates sampling and conversion; completion is signaled by the BUSY output going low after ≤10µs. The MAX165BCWN+ embeds all necessary timing circuitry internally, eliminating clock distribution and jitter concerns.

Can the internal reference of the MAX165BCWN+ be overridden with an external voltage?

Yes, the REF pin of the MAX165BCWN+ can be driven by an external reference voltage. When an external source is applied, the internal 4.096V reference is disabled. This allows use of higher-precision or temperature-stable references such as the MAX6126 or ADR441. The MAX165BCWN+ maintains full linearity and accuracy specifications when properly biased with a stable external reference meeting drive and noise requirements.

How is the 12-bit result accessed on the MAX165BCWN+ parallel interface?

The MAX165BCWN+ outputs its 12-bit result across D0–D11, but uses HBEN and LBEN to enable byte-wide reads on an 8-bit data bus. To read the full result, assert LBEN to latch D0–D7 (lower byte), then assert HBEN to latch D8–D11 (upper nibble) on D4–D7. This two-cycle method allows compatibility with 8-bit microcontrollers without requiring a 12-bit bus. The MAX165BCWN+ timing ensures valid data setup before each strobe.

Is the MAX165BCWN+ pin-compatible with other devices in the MAX165 family?

Yes, the MAX165BCWN+ shares identical pinout and package with the MAX165ACWN+ (±0.5 LSB INL, 0°C to +70°C) and MAX165CCWN+ (±2 LSB INL, 0°C to +70°C). All three variants use the same SOIC-28 footprint, power connections, reference, and interface signals. Firmware and PCB layout are interchangeable-only the grade-specific INL and temperature calibration differ. The MAX165BCWN+ serves as the mid-grade option balancing cost and precision.