AD7893BRZ-5

Overview

The AD7893BRZ-5 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 serial interface, an on-chip track/hold amplifier, and a 6 μs conversion time. It supports a unipolar input voltage range of 0 V to +5 V with straight binary output coding. Key performance metrics include a signal-to-noise ratio of 70 dB, differential nonlinearity of ±1 LSB, and integral nonlinearity of ±1 LSB.

Feature Summary

• Integrated signal scaling for direct handling of 0 V to +5 V analog inputs without external attenuation circuitry.
• On-chip track/hold amplifier ensures accurate digitization of full-scale sine waves at maximum throughput rates.
• Two-wire high-speed serial interface simplifies connection to microcontrollers and DSP processors.

Applications

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

Procurement Notes

Verify the specific suffix 'BRZ' corresponds to the B-grade linearity and RoHS-compliant SOIC packaging as defined in the manufacturer's ordering guide. Confirm that the application requires the 0 V to +5 V input range associated with the -5 variant. Ensure the design accommodates the single +5 V supply requirement and external reference needs.

Selection Notes

Select this component when a compact 8-pin solution is required for 12-bit precision applications. The BRZ designation indicates commercial temperature range operation (-40°C to +85°C) with ±1/2 LSB relative accuracy. Consider the AD7893ARZ-5 if lower cost is prioritized over the tighter linearity specifications of the B-grade version.

Part Context

The AD7893 series utilizes Analog Devices' LC2MOS process, combining bipolar precision with CMOS low power. This specific model belongs to the unipolar input family, distinct from the bipolar ±10 V or ±2.5 V variants. It shares the same core ADC architecture and pinout with other AD7893 models, differing primarily in internal signal scaling resistors and accuracy grades.

Replacement Considerations

Public confirmed substitutes include the AD7893ARZ-5 for cost-sensitive designs with standard linearity, or the AD7893AN-5 for plastic DIP packaging requirements. Cross-family replacements like the AD7894 offer higher resolution but require different interface considerations.