ADM8660ANZ

Overview

The ADM8660ANZ is a CMOS switched-capacitor voltage converter manufactured by Analog Devices Inc. It functions as an inverting charge pump, converting positive input voltages ranging from +1.5 V to +7 V into negative output supplies between -1.5 V and -7 V. The device provides a maximum output current of 100 mA with a low quiescent current of 600 µA. It features a selectable charge pump frequency of 25 kHz or 120 kHz and includes a shutdown function for power management. The component is housed in an 8-lead SOIC package.

Feature Summary

• Inverts input supply voltage to generate negative rails
• Includes shutdown control for reduced power consumption
• Offers selectable switching frequencies for noise optimization
• Supports operation with small external capacitors

Applications

• Op amp power supplies requiring dual rails
• Portable computers and handheld instruments
• Remote data acquisition systems
• Single-supply systems needing negative bias

Procurement Notes

Verify the specific suffix 'ANZ' against official Analog Devices documentation to confirm pinout compatibility and RoHS status. Ensure the selected package matches the target PCB footprint. Confirm availability through authorized distributors as stock levels fluctuate. Validate that the required output current does not exceed the 100 mA limit under thermal constraints.

Selection Notes

Select this component when a compact solution is needed to generate a negative voltage rail from a single positive source. It is suitable for applications where low standby current is critical due to battery operation. Consider the 100 mA current limit and the need for external capacitors when designing the power stage. Compare with non-inverting alternatives if a positive doubled voltage is required instead.

Part Context

The ADM8660 belongs to the ADM660/ADM8660 family of CMOS switched-capacitor converters. It serves as a direct pin-compatible upgrade for legacy parts like the MAX660 and ICL7660. The 'ANZ' designation typically indicates an 8-lead SOIC package with lead-free construction and RoHS compliance, distinguishing it from older plastic DIP variants.

Replacement Considerations

The ADM660 is a related part within the same family but lacks the shutdown feature found in the ADM8660. Verify functional equivalence if substituting with other inverting charge pumps such as the MAX660 or ICL7660, noting potential differences in current capability and package dimensions.