AD604AR

Instrumentation, Op Amps, Buffer Amps Overview

The AD604AR is a dual-channel, ultralow noise variable gain amplifier (VGA) from Analog Devices. It features a linear-in-dB response with a 40 MHz bandwidth and 170 V/μs slew rate. Each channel includes a programmable preamplifier offering gains of 14 dB or 20 dB, resulting in total gain ranges of 0 dB to 48 dB or 6 dB to 54 dB. The device provides an input resistance of 300 kΩ and operates within a temperature range of −40°C to +85°C.

Instrumentation, Op Amps, Buffer Amps Feature Summary

• Dual independent channels with ultralow input noise performance
• Linear-in-dB gain control via single-ended unipolar voltage
• Programmable preamplifier gain for flexible dynamic range
• Integrated power-down mode for low quiescent current

Instrumentation, Op Amps, Buffer Amps Applications

• Ultrasound and sonar time-gain controls
• High performance automatic gain control systems
• Signal measurement

Instrumentation, Op Amps, Buffer Amps Procurement Notes

Verify the specific package type, as the AD604 series includes SSOP, SOIC, and PDIP options. Confirm that the ordering suffix corresponds to the required physical footprint. Ensure compatibility with the intended supply voltage and gain scaling requirements before procurement.

Instrumentation, Op Amps, Buffer Amps Selection Notes

Select this component for applications requiring precise logarithmic gain adjustment and wide bandwidth. Consider the preamplifier gain setting based on the desired overall dynamic range. Evaluate the need for external AC coupling capacitors to manage DC offsets between the preamplifier and the differential attenuator stage.

Instrumentation, Op Amps, Buffer Amps Part Context

This part belongs to the AD60x VGA family, designed for high-precision signal processing. It utilizes a DSX-AMP architecture combining a variable attenuator with a fixed-gain amplifier. The device is optimized for medical imaging and radar systems where low noise and accurate gain control are critical.

Instrumentation, Op Amps, Buffer Amps Replacement Considerations

The AD604ARSZ is a pin-compatible variant in a different package. Other members of the AD60x family may serve as alternatives if preamplifiers are not required.