ADA4805-1AKSZ-R7

Overview

The ADA4805-1AKSZ-R7 is a single-channel, high-speed voltage feedback operational amplifier manufactured by Analog Devices Inc. It features rail-to-rail output capability and an exceptionally low quiescent current of 500 µA per amplifier. The device offers a −3 dB bandwidth of 105 MHz at unity gain and a slew rate of 160 V/µs. Key electrical parameters include a maximum input offset voltage of 125 µV, typical offset drift of 0.2 µV/°C, and input noise of 5.9 nV/√Hz at 100 kHz. It operates on supply voltages ranging from 2.7 V to 10 V and includes a shutdown pin that reduces current consumption to approximately 3 µA with a turn-on time of 3 µs.

Feature Summary

• Rail-to-rail output stage providing full signal swing across the supply range
• Ultralow power consumption with active shutdown mode for dynamic power scaling
• High speed performance with 105 MHz bandwidth and 160 V/µs slew rate
• Low noise characteristics suitable for precision data acquisition systems

Applications

• High resolution, high precision analog-to-digital converter (ADC) drivers
• Battery-powered instrumentation
• Micropower active filters
• Portable point of sales terminals
• Active RFID readers

Procurement Notes

Verify the specific ordering suffix AKSZ corresponds to the 6-lead SC70 package configuration as defined in the official Analog Devices Ordering Guide. Confirm that the datasheet revision matches the required specifications for your design. Ensure compatibility with the intended operating temperature range of −40°C to +125°C. Cross-reference the part number with the manufacturer's current availability status before finalizing procurement plans.

Selection Notes

Select this component when designing circuits that require both high bandwidth and minimal power consumption. The integrated shutdown feature makes it suitable for battery-operated devices requiring dynamic power management between ADC sampling intervals. Consider the 6-lead SC70 package constraints regarding thermal dissipation and PCB layout space. Verify that the input common-mode voltage range aligns with the system's signal levels relative to the negative supply rail.

Part Context

This device belongs to the ADA4805 family of low-power, rail-to-rail amplifiers. It shares core architectural similarities with the dual-channel ADA4805-2 but provides a single amplifier configuration. Both variants utilize Analog Devices' proprietary XFCB process to achieve low noise and high speed. The family is designed to drive high-resolution SAR ADCs efficiently while maintaining low static power draw.

Replacement Considerations

Direct functional substitutes within the same package are not explicitly listed in the provided documentation. Designers should evaluate other single-channel rail-to-rail amplifiers from Analog Devices or competitors, ensuring they match the 105 MHz bandwidth, 500 µA quiescent current, and SC70 package dimensions.