AD7893BRZ-10

Overview

The AD7893BRZ-10 is a 12-bit successive approximation analog-to-digital converter (ADC) fabricated in LC2MOS technology. It operates from a single +5 V supply and consumes 25 mW typical power. The device features an on-chip track/hold amplifier, internal clock, and high-speed serial interface. It accepts a bipolar input voltage range of ±10 V with an input resistance of 16 kΩ minimum. Key performance metrics include a maximum conversion time of 6 μs, a throughput rate up to 117 kHz, and a signal-to-noise ratio of 70 dB at 10 kHz input frequency. Relative accuracy is specified at ±1/2 LSB.

Feature Summary

• Integrated signal scaling for direct ±10 V input handling without external attenuators
• On-chip track/hold amplifier ensures accurate digitization of full-scale sine waves
• Two-wire serial interface simplifies connection to microcontrollers and DSPs
• Single +5 V supply operation enables use in battery-powered applications

Applications

• Battery-powered portable instrumentation
• Industrial process control systems
• Data acquisition modules requiring compact form factors

Procurement Notes

Verify the specific suffix 'BRZ' against current manufacturer documentation to confirm RoHS compliance status and package type. Confirm availability through authorized distributors as older series components may have limited stock or end-of-life status. Ensure the ordering code matches the required temperature range and linearity specifications.

Selection Notes

Select this component when a single-supply 12-bit ADC with integrated signal conditioning is required. The ±10 V input range eliminates the need for external resistive dividers. Verify that the system timing allows for the 6 μs conversion period plus read overhead. Consider the SOIC-8 package constraints for PCB layout and thermal management.

Part Context

The AD7893 belongs to Analog Devices' family of fast, low-power serial ADCs. The BRZ variant denotes the commercial temperature range (-40°C to +85°C) and SOIC-8 plastic package. It shares architectural similarities with the AD7892 and AD7890 but offers a distinct 8-pin footprint optimized for space-constrained designs.

Replacement Considerations

Direct pin-compatible replacements are not explicitly listed in the provided datasheet. Review the AD7893AN-10 or AD7893AR-10 for identical electrical characteristics with different packaging or accuracy grades. Consult the manufacturer's obsolescence notices for modern equivalents.