AD7899ARZ-2

Overview

The AD7899ARZ-2 is a 14-bit successive approximation analog-to-digital converter operating from 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 supports unipolar input ranges of 0 V to 2.5 V or 0 V to 5 V, utilizing straight binary output coding. It includes an internal 2.5 V reference, on-chip clock oscillator, and high-speed parallel interface compatible with 3 V and 5 V processors. Typical power consumption is 80 mW in normal mode.

Feature Summary

• Integrated track/hold amplifier with high input bandwidth for accurate signal sampling
• High-speed parallel data bus interface supporting 3 V and 5 V logic levels
• On-chip laser-trimmed clock oscillator with external clock capability
• Overvoltage protection on analog inputs to prevent damage during fault conditions

Applications

• Industrial process control systems requiring high-resolution data acquisition
• Portable instrumentation powered by single supply voltages
• Digital signal processing interfaces needing fast parallel data transfer
• Medical equipment requiring precise analog signal digitization

Procurement Notes

Verify the specific suffix ARZ-2 corresponds to the unipolar 0 V to 5 V or 0 V to 2.5 V input range variant. Confirm package type matches design requirements, as the part is available in SOIC and SSOP formats. Check RoHS compliance status for environmental regulations. Ensure voltage levels align with system specifications before ordering.

Selection Notes

Select this model when unipolar input signals within the 0 V to 5 V range are required. The parallel interface suits applications needing direct connection to microprocessors without serial protocol overhead. Consider the 80 mW typical power dissipation for thermal management. Verify that the 400 kSPS throughput meets the system's real-time data acquisition needs.

Part Context

The AD7899 series comprises three variants differentiated by input voltage ranges. The AD7899-1 handles bipolar ±10 V and ±5 V ranges. The AD7899-3 supports a ±2.5 V bipolar range. The AD7899-2 specifically addresses unipolar applications with 0 V to 2.5 V or 0 V to 5 V inputs, making it distinct within the family for single-supply unipolar designs.

Replacement Considerations

No public confirmed substitute part numbers are documented in the provided datasheet.