AD8351ARM

Overview

The AD8351ARM is a low-cost, fully differential RF/IF amplifier manufactured by Analog Devices Inc. in a 10-lead MSOP package. It operates on a single supply voltage ranging from 3 V to 5.5 V, with a typical quiescent current of 28 mA at 5 V. The device features a -3 dB bandwidth of 2.2 GHz when configured for a voltage gain of 12 dB. Voltage gain is programmable from 0 dB to 26 dB using a single external resistor. Key performance metrics include an input noise of 2.7 nV/√Hz at AV=10 dB, a slew rate of 13,000 V/μs, and an output third-order intercept point (OIP3) of 31 dBm at 70 MHz. Harmonic distortion is specified as -79 dBc for second harmonic and -81 dBc for third harmonic at 70 MHz.

Feature Summary

• Fully differential architecture supporting single-ended-to-differential conversion
• Single-resistor programmable voltage gain ranging from unity to 26 dB
• Integrated adjustable output common-mode voltage control via VOCM pin
• Power-down capability for reduced standby power consumption

Applications

• Differential drivers for high-speed analog-to-digital converters (ADCs)
• Intermediate frequency (IF) sampling receivers in digital communication systems
• RF and IF gain blocks within transceiver architectures
• Interface circuits for surface acoustic wave (SAW) filters

Procurement Notes

Verify the specific suffix against the manufacturer's latest datasheet to confirm package type and temperature range. The AD8351ARM designation indicates a 10-lead MSOP package. Ensure that the required operating temperature range aligns with the standard commercial grade (-40°C to +85°C). Confirm availability status directly with authorized distributors, as lead times may vary based on production cycles. Cross-reference the ordering part number with the official Analog Devices catalog to avoid discrepancies in revision levels or packaging formats.

Selection Notes

Select this component when a fully differential signal path is required for RF or IF frequencies up to 2.2 GHz. It is suitable for applications demanding low noise and high linearity, such as driving 10- to 14-bit ADCs. Consider the single-supply operation and integrated common-mode adjustment if board space and component count are constraints. Evaluate the need for power-down functionality if energy efficiency during idle states is critical. Ensure the external gain resistor selection matches the desired amplification level within the 0 dB to 26 dB range.

Part Context

The AD8351 belongs to Analog Devices' family of high-speed differential amplifiers designed for wireless infrastructure and test equipment. It utilizes XFCB silicon bipolar technology to achieve high slew rates and wide bandwidth. The device simplifies circuit design by integrating output common-mode control, eliminating the need for additional biasing networks. It serves as a bridge between single-ended sources and differential processing stages, commonly found in modern software-defined radio and broadband communication platforms.

Replacement Considerations

Check the Analog Devices product selector for updated differential amplifiers with similar bandwidth and gain specifications. Verify compatibility regarding pinout, package dimensions, and electrical characteristics before substituting. Review the official replacement guide for any recommended upgrades or end-of-life notifications for the AD8351 series.