ADA4945-1ACPZ-R7

Overview

The ADA4945-1ACPZ-R7 is a high-speed, fully differential amplifier designed as an ADC driver. It operates on a power supply range of 3 V to 10 V and features two selectable power modes: full power mode with 4 mA quiescent current and 145 MHz bandwidth, and low power mode with 1.4 mA quiescent current and 80 MHz bandwidth. The device provides a slew rate of 600 V/µs in full power mode, input voltage noise of 2.0 nV/√Hz at 100 kHz, and a maximum offset voltage of ±115 µV across the temperature range of -40°C to +125°C. It includes adjustable output clamps for ADC protection and is housed in a 16-lead LFCSP package.

Feature Summary

• Features two selectable power modes allowing optimization between performance and power consumption.
• Provides rail-to-rail output swing and wide input common-mode voltage range.
• Includes internal common-mode feedback loop for exceptional output balance and even-order harmonic distortion suppression.
• Offers adjustable output clamps to protect connected ADC inputs from overvoltage conditions.

Applications

• Low power Sigma-Delta, PulSAR, and SAR ADC drivers
• Single-ended to differential converters
• Differential buffers
• Medical imaging systems
• Process control applications

Procurement Notes

Verify the specific suffix R7 indicates reel packaging when sourcing. Confirm the component matches the Analog Devices manufacturer identification. Ensure the LFCSP-16 package dimensions align with design constraints. Check RoHS compliance status through official documentation before integration into production assemblies.

Selection Notes

Select this component for applications requiring low noise and high linearity in driving high-resolution data converters. Choose the full power mode for maximum bandwidth and slew rate requirements. Opt for low power mode when minimizing quiescent current is critical. Ensure the supply voltage remains within the specified 3 V to 10 V range for proper operation.

Part Context

This part belongs to the ADA4945-1 series of fully differential amplifiers manufactured by Analog Devices. It utilizes a silicon germanium complementary bipolar process to achieve low distortion levels. The series is designed specifically for signal chain applications where driving analog-to-digital converters requires precise gain and phase matching.

Replacement Considerations

No public confirmed substitute part numbers are available in the provided documentation.