AD7892ARZ-2

Overview

The AD7892ARZ-2 is a single-supply, 12-bit successive approximation analog-to-digital converter fabricated in LC2MOS technology. It operates from a +5 V supply and achieves a throughput rate of 500 kSPS with a conversion time of 1.6 µs. The device features an on-chip track/hold amplifier and an internal +2.5 V reference. It supports both parallel and serial interfaces for microprocessor connectivity. The ARZ-2 variant specifies a relative accuracy of ±1 LSB and operates within a temperature range of -40°C to +85°C.

Feature Summary

• Integrated signal scaling allows direct acquisition of 0 V to +2.5 V input ranges without external attenuation circuitry.
• Versatile interface logic enables flexible connection to microprocessors via either parallel or serial data modes.
• On-chip track/hold amplifier ensures accurate sampling at high speeds while maintaining low power consumption.

Applications

• Portable instrumentation systems requiring low power operation
• Industrial process control data acquisition
• Battery-powered measurement devices

Procurement Notes

Verify the specific suffix 'ARZ-2' against the manufacturer's ordering guide to confirm the SOIC package, unipolar input range, and accuracy grade. Ensure the design accounts for the 500 kSPS throughput specification rather than the higher rates available in other variants. Confirm that the application voltage requirements align with the 0 V to +2.5 V input range defined for this version.

Selection Notes

Select this component when a single +5 V supply and 12-bit resolution are required for unipolar signals between 0 V and +2.5 V. The 500 kSPS throughput is suitable for moderate-speed applications. Consider the AD7892-3 if a higher 600 kSPS rate or bipolar input range is needed instead. Verify that the ±1 LSB accuracy meets the system linearity requirements.

Part Context

This part belongs to the AD7892 family of high-speed, low-power ADCs. The 'A' designation indicates the commercial temperature range (-40°C to +85°C), while 'R' denotes the SOIC package. The '-2' suffix identifies the specific input range configuration (0 V to +2.5 V) and accuracy class within the product line.

Replacement Considerations

AD7892BRZ-2 offers improved accuracy (±1 LSB vs ±1.5 LSB typical for A-version) with identical electrical performance and pinout. AD7892AN-2 provides the same functionality in a PDIP package for through-hole applications.