ADA4897-1ARJZ-RL

Overview

The ADA4897-1ARJZ-RL is a single-channel, unity-gain stable voltage feedback operational amplifier manufactured by Analog Devices Inc. It features a rail-to-rail output stage and operates on a supply voltage range of 3 V to 10 V. The device utilizes a proprietary SiGe bipolar process to achieve high speed with low power consumption. Key electrical parameters 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. Input noise density is specified at 1 nV/√Hz at 100 kHz and 2.4 nV/√Hz at 10 Hz. The quiescent current per amplifier is typically 3 mA. The input offset voltage has a maximum value of 500 µV.

Feature Summary

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

Applications

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

Procurement Notes

Verify the specific package type and reel configuration when ordering. Confirm that the disabled state logic aligns with system requirements, as the disable pin controls power consumption. Ensure supply voltages remain within the 3 V to 10 V operating range to maintain specified performance characteristics and prevent damage.

Selection Notes

Select this component for applications requiring low noise and high speed in a compact SOT-23-6 package. The integrated disable function offers flexibility for power-sensitive designs. Consider the 3 mA quiescent current against system power budgets. Verify thermal dissipation capabilities if operating near maximum temperature limits or driving heavy loads.

Part Context

This part belongs to the ADA4896-2/ADA4897-1/ADA4897-2 family of low noise, rail-to-rail output amplifiers. The ADA4897-1 variant specifically provides a single channel solution. It shares architectural similarities with the dual ADA4896-2 and dual ADA4897-2 but is optimized for single-channel applications in smaller footprints.

Replacement Considerations

Check for direct functional equivalents within the ADA4896-2/ADA4897-1/ADA4897-2 family. Verify pin compatibility and electrical specifications such as bandwidth and noise density before substitution.

FAQ

How does the disable feature affect the amplifier's operation?

The disable pin allows the amplifier to be turned off to reduce power consumption. When disabled, the quiescent current drops significantly, and the output impedance increases.

What is the input common-mode voltage range?

The input common-mode voltage range extends from slightly below the negative supply to approximately 100 mV below the positive supply, enabling rail-to-rail input operation.