ADA4505-2ACBZ-R7

Overview

The ADA4505-2ACBZ-R7 is a dual-channel micropower operational amplifier from Analog Devices, featuring rail-to-rail input and output capabilities. It operates on a single supply of 1.8 V to 5 V or dual supplies of ±0.9 V to ±2.5 V. Key electrical specifications include a maximum offset voltage of 3 mV, typical input bias current of 0.5 pA, and supply current of 7 µA per amplifier. The device offers a gain-bandwidth product of 50 kHz, slew rate of 6 mV/µs, and CMRR of 105 dB. It is housed in an 8-ball WLCSP package and supports the extended industrial temperature range of -40°C to +125°C.

Feature Summary

• Zero input crossover distortion achieved through an internal charge pump technology that powers the input differential pair.
• Rail-to-rail input and output swings ensure full common-mode dynamic range without phase reversal.
• Micropower consumption with less than 10 µA per amplifier for extended battery life.
• High precision performance with low offset voltage drift and high PSRR/CMRR.

Applications

• Pressure and position sensors
• Remote security systems
• Medical monitors
• Battery-powered consumer equipment
• Hazard detectors

Procurement Notes

Verify the specific ordering suffix ACBZ-R7 against the manufacturer's official documentation to confirm the 8-ball WLCSP package and tape-and-reel packaging format. Ensure compatibility with the extended industrial temperature range (-40°C to +125°C) requirements for your design. Cross-reference the datasheet revision history for any updates to electrical characteristics or outline dimensions prior to finalizing procurement.

Selection Notes

Select this component when designing low-voltage, battery-operated circuits requiring high precision and minimal power consumption. The zero crossover distortion feature makes it suitable for applications where standard rail-to-rail amplifiers introduce signal errors near the supply rails. Consider the 8-ball WLCSP package constraints for PCB layout and thermal management if operating at the upper end of the temperature range.

Part Context

This part belongs to the ADA4505-x family of micropower amplifiers, which includes single (ADA4505-1), dual (ADA4505-2), and quad (ADA4505-4) variants. The family shares core technologies such as the charge pump-based input stage and CMOS architecture. While other variants offer different channel counts and packages like MSOP or TSSOP, the ADA4505-2ACBZ-R7 specifically provides the dual-channel configuration in a compact wafer-level chip-scale package.

Replacement Considerations

The AD8505/AD8506/AD8508 series are noted as related members of the zero crossover op amp family offering similar supply voltage ranges. Verify pinout compatibility and specific electrical parameter differences before substitution.

FAQ

How does the ADA4505-2 eliminate crossover distortion?

It uses an on-chip charge pump to power the input differential pair, allowing the input voltage to vary from one supply extreme to the other without switching between differential pairs.

What is the minimum supply voltage for operation?

The device can operate from a single supply as low as 1.8 V or dual supplies as low as ±0.9 V.