AD7899ARZ-2REEL

Overview

The AD7899ARZ-2REEL is a 14-bit successive-approximation analog-to-digital converter (ADC) manufactured by Analog Devices. It operates from a single 5 V supply and delivers a maximum throughput rate of 400 kSPS with a conversion time of 2.2 µs. The device features an internal 2.5 V reference, on-chip clock oscillator, and high-speed parallel interface compatible with 3 V or 5 V processors. Designed for unipolar applications, the AD7899-2 variant supports input ranges of 0 V to 2.5 V and 0 V to 5 V. It includes overvoltage protection on analog inputs and offers low power consumption of 80 mW in normal mode.

Feature Summary

• Unipolar input range configuration supporting 0 V to 2.5 V and 0 V to 5 V signals
• High-speed parallel data bus interface allowing direct connection to microprocessors
• Integrated track/hold amplifier with fast acquisition time for accurate signal sampling
• Overvoltage protection on analog inputs prevents damage during voltage excursions

Applications

• Industrial process control systems requiring high-resolution data acquisition
• Portable instrumentation powered by single supply voltages
• Data acquisition modules interfacing with 3 V or 5 V digital logic
• Vibration monitoring and acoustic analysis equipment

Procurement Notes

Verify that the specific ordering suffix matches the required package type and temperature range. Confirm the -2 version designation aligns with unipolar input requirements. Check RoHS compliance status if environmental regulations apply. Ensure the reel quantity meets production needs without exceeding storage limits. Validate pinout compatibility with existing PCB footprints before finalizing orders.

Selection Notes

Select the AD7899ARZ-2REEL when unipolar signal conditioning is necessary. Choose this part over bipolar versions (-1 or -3) if negative voltage handling is not required. Consider the parallel interface complexity versus serial alternatives if pin count is not constrained. Evaluate power dissipation requirements against thermal management capabilities in the target enclosure.

Part Context

This component belongs to the AD7899 family of 14-bit ADCs from Analog Devices. The -2 suffix specifically denotes the unipolar input range variant. Other family members include the AD7899-1 for bipolar ±10 V/±5 V ranges and the AD7899-3 for ±2.5 V ranges. All variants share identical performance characteristics regarding speed and resolution.

Replacement Considerations

Direct functional substitutes within the same family include the AD7899AR-2 for SOIC packages or AD7899ARS-2 for SSOP packages. Verify that any replacement maintains the unipolar input specification and parallel interface timing requirements.