Analog Devices Inc. AD632TD

Overview

AD632TD from Analog Devices is an internally trimmed, high-precision monolithic four-quadrant analog multiplier/divider in a 14-lead SBDIP ceramic package, delivering ±1.0% maximum multiplying error over −55°C to +125°C, 1 MHz small-signal bandwidth, and 90 µV rms wideband noise (10 Hz–10 kHz), used for accurate voltage-controlled oscillators, differential ratio computation, and trigonometric function synthesis in aerospace and defense signal processing systems.

For engineers reviewing the AD632TD datasheet, AD632TD pinout, AD632TD application, or AD632TD equivalent, this page provides verified specifications, MIL-STD-883B-screened performance data, differential input architecture details, Z-input summing capability, and substitution guidance for high-reliability analog computing designs requiring extended temperature operation.

Technical Context

The AD632TD implements a fully differential translinear multiplier core with buried zener reference and thin-film resistor network, enabling guaranteed ±1.0% total multiplying error across −55°C to +125°C without external trims. Its transfer function is VO = [(X₁−X₂)(Y₁−Y₂)/10] + Z₂, supporting multiplier, divider, squarer, and square-rooter modes.

It features three fully differential, high-impedance inputs (X, Y, Z) with 10 MΩ differential resistance and ≥70 dB CMRR, plus an output amplifier with 20 V/µs slew rate, 1 MHz bandwidth at 0.1 V rms, and ±11 V output swing into 2 kΩ load under ±15 V supplies.

Key Specifications

Pinout & Package

AD632TD is housed in a hermetically sealed 14-lead side-brazed ceramic dual in-line package (SBDIP, D-14), rated for high-reliability applications per MIL-STD-883B screening. The package provides low thermal resistance (θ_JA = 95°C/W) and stable electrical performance across extreme temperature excursions.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar analog multiplier applications.

Compared with AD632SD and AD532KD, the AD632TD delivers tighter error tolerance over full military temperature range, integrated differential Z summation, and higher bandwidth-making it the only option qualified for new designs requiring Level B screening and analog computation fidelity.

Availability

AD632TD is available at Aetrix Electronics and suitable for aerospace telemetry, defense radar subsystems, and nuclear instrumentation requiring stable component supply, long-term obsolescence management, and MIL-STD-883B-certified traceability.

Supply support for AD632TD 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 leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, headquartered in Norwood, MA, serving precision instrumentation, communications, and defense markets since 1965.

The AD632 product line was designed for high-accuracy analog computation in mission-critical systems where digital alternatives introduce latency, quantization noise, or power overhead-enabling continuous-time mathematical operations with sub-percent error.

FAQ

What is the operating temperature range certified for AD632TD?

The AD632TD is specified and tested over −55°C to +125°C, with guaranteed ±1.0% maximum multiplying error across that full range. This rating is validated under MIL-STD-883B screening, including thermal cycling and high-temperature life testing, making AD632TD suitable for engine-mounted avionics and downhole oilfield electronics where ambient extremes occur.

Does AD632TD require external trimming to achieve its published accuracy?

No, AD632TD is internally trimmed at wafer level and requires no external trims to meet its ±1.0% multiplying error specification over −55°C to +125°C. The VOS pin allows optional fine adjustment (±30 mV range) for applications demanding sub-0.5% residual error, but AD632TD performs to datasheet limits out-of-box in standard configurations.

Can AD632TD operate with asymmetric supply voltages such as +15 V and −5 V?

Yes, AD632TD supports supply voltages from ±8 V to ±22 V independently on each rail, allowing asymmetric operation like +15 V/−5 V. However, full-scale output swing and error specifications assume symmetrical ±15 V; deviation reduces headroom and may increase total error beyond ±1.0% if common-mode input limits are exceeded.

How does the Z-input functionality work in AD632TD?

The AD632TD's Z-input (pins Z1 and Z2) provides a fully differential summing node that algebraically adds an external signal to the multiplier output before final amplification. With Z2 referenced to system ground, the AD632TD can implement offset correction, gain scaling, or composite signal generation - all while maintaining high CMRR and low drift due to matched internal resistors.

Is AD632TD pin-compatible with AD532 series devices?

No, AD632TD uses a 14-lead SBDIP (D-14) package with different pin assignments than the 14-pin DIP of AD532KD. While both perform multiplier functions, AD632TD introduces new pins (e.g., dedicated Z1/Z2, NC pins) and reassigns OUT, +VS, and −VS positions. PCB layout must be redesigned; direct replacement is not possible without adapter or redesign.