ADA4938-1ACPZ-R7

Overview

The ADA4938-1ACPZ-R7 is a single-channel ultralow distortion differential ADC driver manufactured by Analog Devices Inc. It features a 1000 MHz small-signal bandwidth and a 4700 V/μs slew rate, with an input voltage noise of 2.6 nV/√Hz. The device operates on a supply voltage range of 4.5 V to 11 V (±5 V typical) and draws 37 mA quiescent current per amplifier. It provides adjustable output common-mode voltage and supports gains via external resistors. Packaged in a 16-lead LFCSP (3 mm × 3 mm), it functions within the -40°C to +85°C industrial temperature range.

Feature Summary

• Ultra-low harmonic distortion performance utilizing proprietary high voltage XFCB process technology
• Internal common-mode feedback loop ensures exceptional output balance and suppresses even-order harmonics
• Adjustable output common-mode voltage allows direct matching to analog-to-digital converter inputs
• Flexible configuration supporting both full differential and single-ended-to-differential signal conversion

Applications

• Driving high-performance ADCs up to 16-bit resolution
• Single-ended-to-differential signal conversion
• IF and baseband gain modules
• Differential buffering applications
• Line drivers

Procurement Notes

Verify the specific ordering suffix R7 corresponds to reel packaging requirements for your assembly line. Confirm that the 16-lead LFCSP package dimensions align with your PCB footprint design rules. Ensure power supply decoupling meets the datasheet recommendations to maintain specified distortion levels. Check moisture sensitivity level handling procedures before soldering.

Selection Notes

Select this component when driving high-resolution ADCs requiring low noise and minimal harmonic distortion. The single-channel architecture suits designs where space efficiency is critical compared to dual-channel alternatives. Consider the adjustable VOCM pin for flexible interface compatibility with various ADC input ranges. Evaluate thermal dissipation capabilities if operating near maximum ambient temperatures.

Part Context

This part belongs to the ADA4938 family of differential amplifiers, which also includes the dual-channel ADA4938-2. Both variants share identical electrical characteristics but differ in package count and physical dimensions. The family utilizes Analog Devices' third-generation high voltage XFCB process to achieve superior dynamic performance suitable for precision data acquisition systems.

Replacement Considerations

The ADA4938-1ACPZ-RL serves as a bulk reel alternative to the R7 variant. Verify pinout compatibility and ensure thermal resistance specifications match your board layout constraints when substituting.