AD7899ARSZ-3

Overview

The AD7899ARSZ-3 is a 14-bit successive-approximation analog-to-digital converter (ADC) from Analog Devices, operating on a single 5 V supply. It features a throughput rate of 400 kSPS with a conversion time of 2.2 µs and an acquisition time of 0.3 µs. The device accepts bipolar input ranges of ±2.5 V and utilizes two's complement output coding. Key electrical parameters include a typical power dissipation of 80 mW in normal mode and 20 µW in standby. It offers a signal-to-noise ratio of 78 dB min at 25°C, differential nonlinearity of ±1 LSB max, and integral nonlinearity of ±2 LSB max. The component is housed in a 28-lead SOIC package.

Feature Summary

• Integrated high-speed parallel interface compatible with both 3 V and 5 V logic processors.
• Built-in overvoltage protection on analog inputs prevents damage during voltage excursions.
• Configurable reference input allows selection between internal 2.5 V source or external precision references.
• Dedicated standby control pin enables low-power operation for portable applications.

Applications

• Industrial process control systems requiring high accuracy.
• Portable instrumentation powered by single supplies.
• Data acquisition systems interfacing with microprocessors.

Procurement Notes

Verify the specific suffix '3' to confirm the ±2.5 V input range configuration. Ensure the ordering code matches the required temperature grade and package type. Cross-reference the manufacturer part number with official distributor catalogs to confirm current availability status and lead times before finalizing procurement plans.

Selection Notes

Select this model when a ±2.5 V bipolar input range is required. Compare against AD7899ARZ-1 for ±10 V/±5 V ranges or AD7899ARZ-2 for unipolar options. Consider the 28-lead SOIC package constraints and verify that the 400 kSPS throughput meets system timing requirements.

Part Context

This component belongs to the AD7899 family of fast, low-power 14-bit ADCs. The family includes variants with different input ranges and packaging options. The AD7899 series is designed for applications needing moderate speed and high resolution without complex external circuitry.

Replacement Considerations

Direct functional substitutes within the same family include AD7899ARZ-1 and AD7899ARZ-2, though these differ in analog input voltage ranges. Verify pin compatibility and software coding differences when substituting.