AD8138ARZ-RL

Overview

The AD8138ARZ-RL is a low distortion differential amplifier manufactured by Analog Devices Inc. in an 8-Lead SOIC package with reel packaging. It features a -3 dB bandwidth of 320 MHz at G = +1 and a slew rate of 1150 V/µs. The device operates on supply voltages ranging from +3 V to ±5 V, consuming 90 mW at 5 V. Key electrical parameters include a typical offset voltage of 1 mV, input voltage noise of 5 nV/√Hz, and fast settling time of 16 ns to 0.01%. It provides adjustable output common-mode voltage and externally adjustable gain.

Feature Summary

• Provides single-ended-to-differential or differential-to-differential signal conversion using proprietary XFCB bipolar process technology.
• Features unique internal feedback for balanced output gain and phase matching, suppressing even-order harmonics without requiring tightly matched external components.
• Allows adjustable output common-mode voltage via the VOCM pin to easily level-shift signals for driving single-supply ADCs.
• Delivers low harmonic distortion suitable for driving high-performance data converters while preserving low-frequency and DC information.

Applications

• ADC drivers
• Single-ended-to-differential converters
• IF and baseband gain blocks
• Differential buffers
• Line drivers

Procurement Notes

Verify the specific ordering suffix 'RL' indicates reel packaging when sourcing this component. Confirm that the 8-Lead SOIC package matches your PCB footprint requirements. Ensure the operating temperature range of -40°C to +85°C aligns with your system's environmental specifications. Cross-reference the datasheet revision to confirm current electrical characteristics before finalizing procurement.

Selection Notes

Select this component for applications requiring high-speed differential signal processing with minimal external component matching. It is suitable for driving state-of-the-art 10-bit to 16-bit converters at high frequencies. Consider its wide supply range and low power consumption for systems with strict energy constraints. Evaluate its performance as a gain block in IF and baseband signal chains where low distortion is critical.

Part Context

The AD8138 series represents an advancement over standard op amps for differential signal processing. Manufactured on Analog Devices' proprietary XFCB bipolar process, it simplifies differential amplification. The device eliminates the need for transformers in high-performance ADC applications, preserving DC and low-frequency content. It is available in both SOIC and MSOP packages for industrial temperature operation.

Replacement Considerations

Check for direct pin-compatible alternatives within the AD8138 family, such as the AD8138AARMZ, noting any differences in package type (MSOP vs. SOIC) or specific electrical tolerances. Verify that substitute parts maintain the same 320 MHz bandwidth and low distortion characteristics required for your application.