AD7899ARSZ-1

Overview

The AD7899ARSZ-1 is a 14-bit successive-approximation analog-to-digital converter (ADC) from Analog Devices, housed in a 28-lead SSOP package. It operates on a single 5 V supply with typical power consumption of 80 mW and standby power of 20 µW. The device supports a maximum throughput rate of 400 kSPS with a conversion time of 2.2 µs and an acquisition time of 0.3 µs. It features ±10 V and ±5 V bipolar input ranges, overvoltage protection up to ±18 V, and a high-speed parallel interface compatible with 3 V or 5 V logic.

Feature Summary

• Integrated signal conditioning circuitry allows direct acceptance of standard industrial voltage ranges without external scaling components.
• High-speed parallel data bus enables efficient interfacing with microprocessors, microcontrollers, and digital signal processors.
• Analog inputs include robust overvoltage protection, permitting operation beyond the selected input range limits without device damage.
• Flexible clocking options allow selection between an internal laser-trimmed oscillator and an external clock source for precise timing control.

Applications

• Industrial process control systems requiring fast data acquisition
• Portable instrumentation powered by single-supply batteries
• Data acquisition modules interfacing with 3 V or 5 V digital logic

Procurement Notes

Verify the specific suffix 'ARSZ-1' against the manufacturer's current ordering guide to confirm the SSOP package variant and ±10 V/±5 V input range configuration. Ensure compatibility with system voltage levels and thermal requirements before finalizing procurement orders.

Selection Notes

Select this component when a 14-bit resolution and 400 kSPS throughput are required within a low-power single-supply design. Choose the -1 version specifically for applications needing ±10 V or ±5 V bipolar input ranges. Consider the SSOP package constraints for PCB layout and thermal management during the design phase.

Part Context

The AD7899 series comprises three variants differentiated by input range: the -1 handles ±10 V and ±5 V, the -2 supports 0 V to 5 V and 0 V to 2.5 V, and the -3 manages ±2.5 V. All share identical core ADC performance, power specifications, and interface characteristics, differing only in the internal signal scaling network.

Replacement Considerations

Direct pin-compatible replacements within the same family include AD7899AR-1 for SOIC packages. Verify that any substitute maintains the 400 kSPS throughput and 14-bit accuracy specifications required by the application.