ADA4897-1ARZ-R7

Overview

The ADA4897-1ARZ-R7 is a single-channel, unity-gain stable voltage feedback operational amplifier manufactured by Analog Devices. It features a wide supply range of 3 V to 10 V and operates within an industrial temperature range of -40°C to +125°C. Key electrical specifications include a -3 dB bandwidth of 230 MHz at G = +1, a slew rate of 120 V/µs, and a settling time to 0.1% of 45 ns. The device exhibits low noise characteristics with 1 nV/√Hz at 100 kHz and 2.4 nV/√Hz at 10 Hz. It draws a quiescent current of 3 mA per amplifier and provides rail-to-rail output swing.

Feature Summary

• Low wideband noise performance with 1 nV/√Hz at 100 kHz
• High-speed operation with 230 MHz bandwidth and 120 V/µs slew rate
• Rail-to-rail output capability for maximum dynamic range
• Integrated disable feature for power management

Applications

• Low noise preamplifiers
• Ultrasound amplifiers
• PLL loop filters
• High performance ADC drivers
• DAC buffers

Procurement Notes

Verify the specific package type associated with the ARZ suffix against official documentation before procurement. Confirm that the R7 designation corresponds to the required tape and reel packaging format. Ensure the component meets the intended environmental operating conditions. Cross-reference the manufacturer part number with authorized distributors to validate authenticity and availability status.

Selection Notes

Select this component when designing circuits requiring high speed combined with ultra-low noise in a compact form factor. The voltage feedback architecture offers ease of use and stability across various gain configurations. Consider the 3 mA quiescent current for power-sensitive applications. The disable pin allows for system-level power control, making it suitable for battery-operated or multi-mode devices requiring signal path isolation.

Part Context

This device belongs to the ADA4896-2/ADA4897-1/ADA4897-2 family of low noise, rail-to-rail output amplifiers. Manufactured using Analog Devices' proprietary SiGe bipolar process, the series balances high speed with low power consumption. The ADA4897-1 variant specifically provides a single amplifier channel, distinguishing it from the dual-channel ADA4896-2 and ADA4897-2 models within the same product line.

Replacement Considerations

Consult the official datasheet for direct pin-compatible alternatives within the ADA4896-2/ADA4897-1/ADA4897-2 family. Verify that any substitute maintains the required 230 MHz bandwidth and 1 nV/√Hz noise density. Ensure the replacement supports the 3 V to 10 V supply range and includes the disable functionality if utilized in the design.