AD7893AR-2

Overview

The AD7893AR-2 is a 12-bit successive approximation analog-to-digital converter (ADC) housed in an 8-pin SOIC package. It operates from a single +5 V supply with typical power dissipation of 25 mW. The device features an on-chip track/hold amplifier and accepts an analog input range of 0 V to +2.5 V. Conversion time is 6 μs maximum, supporting throughput rates up to 117 kHz. It utilizes a two-wire serial interface for data output. Key specifications include a signal-to-noise ratio of 70 dB minimum, ±1 LSB relative accuracy, and operation within a temperature range of –40 °C to +85 °C.

Feature Summary

• Integrated 12-bit ADC with on-chip track/hold amplifier and internal clock generation
• High-speed two-wire serial interface compatible with standard microcontrollers
• Single +5 V supply operation with low power consumption suitable for portable applications

Applications

• Battery-powered instrumentation systems requiring low power consumption
• Industrial process control loops utilizing single-ended voltage inputs
• Portable data acquisition devices needing compact 8-pin packaging

Procurement Notes

Verify the specific suffix AR-2 confirms the SOIC package and 0 V to +2.5 V input range. Confirm RoHS compliance status as original datasheets may list leaded variants. Check current availability through authorized Analog Devices distributors or verified component suppliers. Ensure ordering documentation matches the exact part number to avoid pinout or electrical specification mismatches.

Selection Notes

Select this component when a single-channel, 12-bit resolution is required with a unipolar 0 V to +2.5 V input range. It is appropriate for designs constrained by board space due to the 8-pin SOIC form factor. Consider alternative models if bipolar input ranges or higher sampling rates are necessary. Verify that the system can accommodate the 6 μs conversion latency and serial read timing requirements.

Part Context

The AD7893 belongs to Analog Devices' LC2MOS family of fast, low-power ADCs. This series integrates signal scaling, track/hold, and serial logic into minimal packages. The AD7893AR-2 specifically targets cost-sensitive, space-constrained applications where moderate speed and high accuracy are balanced against power efficiency and interface simplicity.

Replacement Considerations

Direct substitutes include other AD7893 variants such as AD7893AN-2 or AD7893BN-2, noting differences in package type (DIP vs. SOIC) and linearity accuracy. Cross-reference tools should be used to identify parametrically similar parts from other manufacturers if the AD7893 series is discontinued.