AD7899ARSZ-2

Overview

The AD7899ARSZ-2 is a 14-bit successive-approximation analog-to-digital converter operating from a single 5 V supply. It achieves a maximum throughput rate of 400 kSPS with a conversion time of 2.2 µs and a track/hold acquisition time of 0.3 µs. The device features 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 overvoltage protection on analog inputs. The part is housed in a 28-lead SSOP package and operates within a temperature range of -40°C to +85°C.

Feature Summary

• Unipolar input configuration supporting 0 V to 2.5 V and 0 V to 5 V ranges
• High-speed parallel interface compatible with 3 V and 5 V logic levels
• Integrated signal conditioning and overvoltage protection on analog inputs

Applications

• Industrial process control systems requiring unipolar signal acquisition
• Portable instrumentation powered by single 5 V supplies
• Data acquisition modules interfacing with 3 V microprocessors

Procurement Notes

Verify the specific suffix 'ARSZ-2' against manufacturer documentation to confirm the SSOP package variant and unipolar input range. Ensure compatibility with system voltage requirements and thermal constraints before integration.

Selection Notes

Select this component for applications requiring 14-bit resolution at 400 kSPS with unipolar inputs. Compare against AD7899-1 for bipolar needs or AD7899-3 for ±2.5 V ranges. Consider power consumption and interface speed requirements relative to the host processor.

Part Context

The AD7899 series comprises fast, low-power 14-bit ADCs. The AD7899-2 variant specifically targets unipolar applications, distinguishing it from the bipolar AD7899-1 and AD7899-3 models. All variants share the same core architecture and performance metrics.

Replacement Considerations

Direct substitutes include other AD7899 variants (AD7899-1, AD7899-3) if input range differences are acceptable. Verify pinout and software compatibility when replacing with different input range versions.