Analog Devices Inc. AD632BD

Overview

AD632BD from Analog Devices is an internally trimmed, monolithic four-quadrant analog multiplier/divider IC with ±0.5% maximum multiplying error at +25°C, differential high-impedance X/Y/Z inputs, 1 MHz small-signal bandwidth, and 90 µV rms wideband noise (10 Hz to 10 kHz). It implements the transfer function [(X₁ − X₂)(Y₁ − Y₂)/10] + Z₂ and is used in precision voltage-controlled oscillators, differential ratio computation, and algebraic function synthesis.

For engineers reviewing the AD632BD datasheet, AD632BD pinout, AD632BD application, or AD632BD equivalent, this page delivers verified specifications, functional context, package mapping, real-world use cases, and validated alternative options for analog signal processing design and replacement selection.

Technical Context

The AD632BD employs a translinear multiplier core with on-chip thin-film resistors and buried zener reference for stable scaling, enabling precise four-quadrant multiplication, division, squaring, and square-root operations without external trims. Its fully differential architecture supports floating numerator/denominator signals in divider mode and maintains ±0.5% full-scale error over −25°C to +85°C.

It features a high-gain output amplifier with 20 V/µs slew rate and 2 µs settling time to 1%, operates from ±8 V to ±18 V supplies, and provides gain adjustment up to ×10 via feedback attenuation while preserving input common-mode range and delivering >70 dB open-loop gain at 50 Hz.

Key Specifications

Pinout & Package

AD632BD is supplied in a 14-lead side-brazed ceramic dual in-line package (SBDIP, D-14), hermetically sealed for reliability in demanding environments. Pin layout follows industry-standard configuration with dedicated differential inputs, summing node, output, supply, and offset adjustment terminals.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AD632AD and AD532KD, the AD632BD offers superior accuracy (±0.5%), lower noise (90 µV vs. 150 µV), and full differential Z-input support-making it optimal for new precision analog computing designs requiring guaranteed performance over temperature without recalibration.

Availability

AD632BD is available at Aetrix Electronics and suitable for voltage-controlled oscillators, differential ratio computation, algebraic function synthesis, accurate analog filters, and precision sensor signal conditioning requiring stable component supply across extended temperature ranges.

Supply support for AD632BD 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.

The AD632 product line delivers precision analog computation ICs designed for laboratory instrumentation, aerospace telemetry, and industrial control systems requiring guaranteed four-quadrant multiplication, division, and nonlinear function generation.

FAQ

What is the maximum multiplying error specification for the AD632BD?

The AD632BD has a maximum multiplying error of ±0.5% of full scale at +25°C, guaranteed over the operating temperature range of −25°C to +85°C. This specification applies without external trimming and is confirmed in the Rev. D datasheet Table 1 under AD632B column. The AD632BD achieves this performance via internal laser trimming of on-chip thin-film resistors and buried zener reference.

Does the AD632BD support true four-quadrant multiplication?

Yes, the AD632BD supports true four-quadrant multiplication through fully differential X, Y, and Z inputs. Its transfer function [(X₁ − X₂)(Y₁ − Y₂)/10] + Z₂ accepts both positive and negative input voltages across all inputs, enabling sign-agnostic computation. The datasheet confirms this in the General Description and Functional Block Diagram sections, and the pinout explicitly defines X1/X2, Y1/Y2, and Z1/Z2 as differential pairs.

What package type is used for the AD632BD?

The AD632BD is packaged in a 14-lead side-brazed ceramic dual in-line package (SBDIP), designated D-14 per the Ordering Guide. This hermetically sealed ceramic package provides high reliability and thermal stability, with θJA = 95°C/W and θJC = 25°C/W. It is distinct from the TO-100 metal can option used by AD632BHZ variants.

Can the AD632BD be used as a divider, and what is its divider accuracy?

Yes, the AD632BD can be configured as a divider with transfer function (Z₁ − Z₂)/(X₁ − X₂) × 10. Its divider accuracy is ±0.35% for X = 10 V and −10 V ≤ Z ≤ +10 V, and ±1.0% over the extended range 0.1 V ≤ X ≤ 10 V, −10 V ≤ Z ≤ +10 V. These values are specified in the Divider Performance section of the Rev. D datasheet for the AD632B grade.

What is the supply voltage range for reliable operation of the AD632BD?

The AD632BD operates reliably from ±8 V to ±18 V dual supply, with rated performance specified at ±15 V. The Absolute Maximum Ratings table confirms ±18 V as the upper limit for continuous operation. Supply current is 4–6 mA quiescent, and the device maintains excellent supply rejection (±0.01%) across this range, as documented in the Rev. D datasheet Power Supply Specifications section.