AD8647ARMZ-REEL

Overview

The AD8647ARMZ-REEL is a dual-channel, rail-to-rail input and output operational amplifier manufactured by Analog Devices Inc. It operates on a single supply voltage ranging from 2.7 V to 5.5 V. The device features a gain bandwidth product of 24 MHz and a slew rate of 11 V/μs. Key electrical specifications include a maximum offset voltage of 2.5 mV, an input bias current of 1 pA, and a voltage noise density of 8 nV/√Hz. It provides a short-circuit output current of 120 mA and includes a low-power shutdown function with standby current as low as 10 nA. The component is housed in a 10-lead MSOP package.

Feature Summary

• Features a dedicated low-power shutdown function that places outputs in a high-impedance state when disabled.
• Provides full rail-to-rail signal swing capability at both the input and output terminals.
• Delivers wide signal bandwidth combined with very low input bias current for precision applications.
• Capable of driving heavy loads with high short-circuit output current.

Applications

• Battery-powered instruments
• Multipole filters
• ADC front ends
• Sensors
• Barcode scanners

Procurement Notes

Verify the specific ordering suffix matches the required packaging format, as REEL indicates tape and reel delivery. Confirm RoHS compliance status through official manufacturer documentation before integration. Ensure the selected package variant aligns with the PCB footprint design requirements. Cross-reference the datasheet revision to confirm all electrical parameters match the intended application constraints.

Selection Notes

Select this component when a combination of wide bandwidth and ultra-low input bias current is required. The integrated shutdown feature makes it suitable for power-sensitive designs where multiplexing is necessary without external switches. Verify that the operating temperature range meets the environmental conditions of the target system. Consider the 10-lead MSOP package dimensions during the layout phase.

Part Context

This part belongs to the AD8646/AD8647/AD8648 family of 24 MHz rail-to-rail amplifiers. The AD8647 specifically distinguishes itself from the AD8646 by including the shutdown control pins. Both devices share identical dynamic performance characteristics but differ in pin configuration and power management capabilities.

Replacement Considerations

The AD8646ARMZ-REEL serves as a functional substitute if the shutdown capability is not required, provided the pinout differences are managed via adapter or redesign.

FAQ

How does the shutdown function operate?

The shutdown function is referenced to the negative supply. A logic level high enables the device, while a logic level low disables it, placing the output in a high-impedance condition.

Can multiple AD8647 outputs be connected together?

Yes, outputs can be connected together to eliminate a multiplexer, provided only one amplifier is active at any given time.