AD8138AARMZ

Overview

The AD8138AARMZ is a low distortion differential ADC driver manufactured by Analog Devices Inc. It features a -3 dB bandwidth of 320 MHz at G = +1 and a slew rate of 1150 V/µs. The device settles to 0.01% in 16 ns with an overdrive recovery time of 4 ns. Input offset voltage is typically 1 mV, with input bias current at 7 µA. Operating supply range spans from +3 V to ±5 V, consuming 90 mW at 5 V. Harmonic distortion includes -94 dBc SFDR at 5 MHz and -85 dBc at 20 MHz. It operates within a temperature range of -40°C to +85°C.

Feature Summary

• Provides single-ended-to-differential conversion with adjustable output common-mode voltage via the VOCM pin.
• Utilizes internal feedback to ensure balanced output gain and phase matching while suppressing even-order harmonics.
• Eliminates the need for transformers in high-performance ADC applications, 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 suffix AARMZ against official documentation to confirm package type and material specifications. Confirm availability status as distribution channels may indicate limited stock or special order requirements. Ensure environmental compliance data matches the required RoHS standards for the intended application.

Selection Notes

Select this component when driving state-of-the-art 10-bit to 16-bit converters at high frequencies due to its low harmonic distortion. Consider the wide supply range and adjustable common-mode output for level-shifting single-supply ADC inputs. Evaluate thermal resistance values if operating near maximum power dissipation limits in SOIC or MSOP packages.

Part Context

The AD8138 series represents a significant advancement over standard op amps for differential signal processing. Manufactured on the proprietary XFCB bipolar process, it simplifies differential signal amplification. The device is available in 8-lead SOIC and MSOP packages, designed for operation across industrial temperature ranges.

Replacement Considerations

Consult official datasheets for direct pin-compatible substitutes within the AD8138 family. Verify that alternative components maintain equivalent bandwidth, settling time, and distortion performance metrics for critical signal chain applications.