AD734BQ

Overview

The AD734BQ is a high-speed, four-quadrant analog multiplier and divider manufactured by Analog Devices Inc. It provides the transfer function W = XY/U with a full power bandwidth of 10 MHz at 20 V p-p output. The device features a total static error of 0.1% typical and distortion typically less than −80 dBc. It includes direct denominator control allowing operation as a two-quadrant divider with a 1000:1 range. The AD734BQ operates within an industrial temperature range of −40°C to +85°C and is available in 14-lead CERDIP and PDIP packages.

Feature Summary

• High accuracy with 0.1% typical total static error
• Direct denominator control for precise two-quadrant division
• Low distortion performance guaranteed below −80 dBc
• Pin-compatible replacement for industry-standard AD534

Applications

• High-performance replacement for AD534
• Modulators and demodulators
• Wideband gain control and rms-to-dc conversion
• Voltage-controlled amplifiers, oscillators, and filters

Procurement Notes

Verify that the specific orderable part number matches the required package type (CERDIP or PDIP) and the industrial temperature grade (BQ). Confirm that the application circuitry supports the specified supply voltage ranges and load conditions to ensure the device meets its guaranteed electrical specifications during operation.

Selection Notes

Select the AD734BQ when a pin-compatible upgrade from the AD534 is required to achieve higher slew rates and lower distortion. This component is suitable for applications demanding wide dynamic range and low noise, such as precision signal processing where input frequencies can reach up to 40 MHz provided the output frequency remains under 10 MHz.

Part Context

The AD734 series represents a generation of analog multipliers utilizing complementary bipolar processes and novel laser trimming techniques. The AD734BQ specifically denotes the industrial temperature variant, offering enhanced speed and accuracy compared to earlier designs while maintaining compatibility with established industry standards for ease of integration into existing systems.

Replacement Considerations

The AD734 is designed as a drop-in replacement for the AD534 due to pin compatibility. Designers should verify that external connections intended for the AD534's Pin 4 are adapted to utilize the AD734's dedicated denominator control pins for optimal performance.

FAQ

Can the internal denominator voltage be replaced?

Yes, the internal 10 V denominator can be disabled via the DD pin and replaced with an external voltage ranging from 10 mV to 10 V.

What is the maximum input frequency for demodulation?

The AD734 can function as a low-distortion demodulator with input frequencies as high as 40 MHz, provided the desired output frequency is less than 10 MHz.