AD7893ARZ-5REEL7

Overview

The AD7893ARZ-5REEL7 is a 12-bit successive approximation analog-to-digital converter housed in an 8-pin SOIC package. 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 a high-speed two-wire serial interface. It accepts a unipolar analog input range of 0 V to +5 V with a minimum input resistance of 9 kΩ. Conversion time is 6 μs maximum, supporting throughput rates up to 117 kHz. Dynamic performance includes a signal-to-noise ratio of 70 dB and total harmonic distortion of -80 dB at a 10 kHz input frequency.

Feature Summary

• Integrated track/hold amplifier ensures accurate digitization of full-scale sine waves without external components.
• Two-wire serial interface simplifies connection to microcontrollers and DSP processors.
• Single +5 V supply operation enables efficient use in battery-powered or portable systems.
• On-chip buffered reference input minimizes external component count and gain errors.

Applications

• Battery-powered instrumentation
• Portable data acquisition systems
• Industrial process control

Procurement Notes

Verify the specific suffix 'REEL7' against official Analog Devices documentation to confirm tape-and-reel packaging quantities. Ensure the ordering code matches the required temperature range and linearity specifications for your application environment.

Selection Notes

Select this model when a 0 V to +5 V input range is required. Verify that the system timing allows for a 6 μs conversion period plus read time. Confirm compatibility with the 2's complement or straight binary coding requirements if interfacing with other variants.

Part Context

This component belongs to the AD7893 family of fast 12-bit ADCs. Variants within the series differ primarily by analog input voltage ranges (±10 V, ±2.5 V, 0–5 V, 0–2.5 V) and temperature grades. All share the same 8-pin footprint and core architecture.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source material. Cross-model compatibility depends on matching input voltage ranges and pin configurations.

FAQ

How is the conversion cycle initiated?

Conversion is initiated on the rising edge of the CONVST input. The track/hold enters hold mode, and the internal clock starts the 6 μs conversion sequence.

What is the output data format for the AD7893-5?

The AD7893-5 uses straight (natural) binary output coding. The serial interface provides four leading zeros followed by the 12-bit conversion result.

Can the device operate at throughput rates higher than 117 kHz?

Yes, the part can operate at higher throughput rates up to 133 kHz by reading data during the conversion phase, though this may slightly degrade dynamic performance metrics like SNR.