AD7893ARZ-10

Overview

The AD7893ARZ-10 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 and consumes 25 mW typical power. The device features a 6 μs conversion time, a track/hold amplifier, and a high-speed serial interface. It accepts a bipolar input voltage range of ±10 V with an input resistance of 16 kΩ minimum. Key performance specifications include a signal-to-noise ratio of 70 dB, differential nonlinearity of ±1 LSB, and integral nonlinearity of ±1 LSB. The operating temperature range spans from -40 °C to +85 °C.

Feature Summary

• Integrates a 12-bit ADC, on-chip track/hold amplifier, and clock generation within a compact 8-pin package.
• Utilizes a two-wire serial interface consisting of SCLK and SDATA for straightforward microcontroller connectivity.
• Supports multiple input ranges including ±10 V, ±2.5 V, 0 V to +5 V, and 0 V to +2.5 V via internal signal scaling.
• Operates efficiently from a single +5 V supply, making it suitable for low-power and battery-driven applications.

Applications

• Battery-powered portable instrumentation systems
• Industrial process control data acquisition
• Medical equipment signal conditioning

Procurement Notes

Verify the specific suffix 'ARZ-10' against the manufacturer's current ordering guide to confirm pinout compatibility and RoHS status. Ensure the external reference voltage matches the required +2.5 V specification for optimal accuracy. Confirm that the system timing allows for the mandatory 600 ns acquisition period between conversions to maintain datasheet performance levels.

Selection Notes

Select this component when a single-channel, 12-bit resolution is required with a ±10 V input range. The ARZ variant denotes the surface-mount SOIC package option. Consider the AD7893BR-10 if higher linearity accuracy (±1/2 LSB) is necessary, or the AD7893SQ-10 for extended industrial temperature operation ranging from -55 °C to +125 °C.

Part Context

The AD7893 belongs to Analog Devices' LC2MOS family of fast serial ADCs. This technology combines precision bipolar circuits with low-power CMOS logic. The part is designed to replace discrete solutions by integrating signal scaling, tracking, and conversion into a minimal footprint. It serves as a cost-effective alternative to parallel interface ADCs in space-constrained designs.

Replacement Considerations

The AD7893BR-10 offers improved linearity accuracy while maintaining the same package and electrical characteristics. For extended temperature requirements, the AD7893SQ-10 provides equivalent functionality across a wider thermal range. Verify pin compatibility before substituting these variants.