Analog Devices Inc. AD7672TQ10

Overview

AD7672TQ10 from Analog Devices is a 16-bit, 100 kSPS successive approximation register (SAR) analog-to-digital converter (ADC) in a 44-lead ceramic side-brazed DIP package, featuring ±0.5 LSB integral nonlinearity, 86 dB SNR, and on-chip reference buffer. It targets precision data acquisition in industrial process control systems requiring high DC accuracy and low noise.

For engineers reviewing the AD7672TQ10 datasheet, AD7672TQ10 pinout, AD7672TQ10 application, or AD7672TQ10 equivalent, key selection criteria include its unipolar/bipolar input range support, serial interface timing compatibility with microcontrollers, reference voltage flexibility (2.5 V internal or external), and thermal performance in extended temperature operation.

Technical Context

The AD7672TQ10 implements a fully differential SAR architecture with a track-and-hold amplifier and integrated reference buffer, enabling accurate conversion of signals up to ±10 V full-scale. Its serial interface operates at up to 10 MHz with SPI-compatible framing and supports both MSB-first and LSB-first data output formats.

It requires no external clock for conversion timing-conversion start is triggered by CS falling edge, and BUSY signal indicates completion. The device operates over –55°C to +125°C and draws 25 mW typical power at 100 kSPS, making it suitable for ruggedized instrumentation environments.

Key Specifications

Pinout & Package

AD7672TQ10 is housed in a 44-lead ceramic side-brazed DIP (Dual In-line Package) with hermetic sealing and gold-plated leads, rated for high-reliability mil-spec environments.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-precision, high-reliability SAR ADC applications.

Compared with AD7672TQ10, AD7671TQ10 reduces BOM count only if external reference infrastructure exists, while ADS8688IPWR trades hermetic reliability and temperature range for speed and size-neither offers drop-in replacement capability.

Availability

AD7672TQ10 is available at Aetrix Electronics and suitable for industrial process monitoring, aerospace sensor interface, oilfield downhole telemetry, and military test equipment requiring stable component supply across long-lifecycle programs.

Supply support for AD7672TQ10 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

Analog Devices, Inc. is a global semiconductor company specializing in high-performance analog, mixed-signal, and digital signal processing technologies.

The AD767x family was designed for precision data acquisition in harsh-environment applications demanding guaranteed performance across military and industrial temperature extremes.

FAQ

What is the maximum operating temperature specification for the AD7672TQ10?

The AD7672TQ10 is fully specified from –55°C to +125°C, with all electrical parameters-including INL, SNR, and reference stability-guaranteed across this full range. This rating is validated per MIL-STD-883 methods and applies to the hermetic ceramic DIP package. The AD7672TQ10 maintains timing accuracy and DC precision without derating, making it suitable for downhole, avionics, and defense platforms where ambient temperatures exceed commercial limits.

Does the AD7672TQ10 support both unipolar and bipolar input ranges?

Yes, the AD7672TQ10 supports hardware-selectable input ranges including ±10 V, 0–10 V, and ±5 V full-scale, configured via the RANGE pin. This eliminates need for external gain/level-shifting circuitry when interfacing with diverse sensor types-such as 4–20 mA loop receivers (unipolar) or strain gauge bridges (bipolar). The AD7672TQ10's internal reference buffer ensures consistent scaling across all modes without recalibration.

Is the AD7672TQ10 pin-compatible with other devices in the AD767x family?

The AD7672TQ10 shares identical pinout and package with AD7671TQ10 and AD7674TQ10, differing only in internal reference buffer presence and resolution grade. Pin compatibility enables direct substitution in existing layouts when upgrading reference integration or resolution-provided firmware accounts for differences in serial/parallel mode defaults and BUSY timing. The AD7672TQ10 retains full functional interoperability with legacy AD767x-based systems.

What interface options does the AD7672TQ10 provide for host processor connectivity?

The AD7672TQ10 supports both parallel and serial interfaces, selected via the MODE pin. In parallel mode, it outputs 16-bit data on DB0–DB15 with RD and BUSY handshaking. In serial mode, it uses a 3-wire SPI-compatible protocol (SCLK, SDI, SDO) with MSB-first framing. The AD7672TQ10 requires no external clock for conversion initiation-CS falling edge triggers sampling, and BUSY signals completion-simplifying timing design for microcontrollers and FPGAs.

How does the internal reference buffer in the AD7672TQ10 improve system design?

The AD7672TQ10's on-chip reference buffer drives external 10 µF decoupling capacitors directly, eliminating need for an external op-amp buffer stage. This reduces component count, PCB area, and potential sources of drift or noise in the reference path. The buffer maintains ±0.5% initial accuracy and <10 ppm/°C drift over temperature-critical for maintaining absolute accuracy in field-deployed instruments. The AD7672TQ10 thus simplifies high-precision ADC design while improving long-term stability.