AD7893ARZ-2REEL

Overview

The AD7893ARZ-2REEL is a 12-bit successive approximation analog-to-digital converter (ADC) manufactured by Analog Devices Inc. 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 unipolar input voltage range of 0 V to +2.5 V with straight binary output coding. Key specifications include a maximum conversion time of 6 μs, a throughput rate up to 117 kHz, and a signal-to-noise ratio of 70 dB minimum at 25°C.

Feature Summary

• Integrated on-chip track/hold amplifier for accurate signal acquisition
• High-speed two-wire serial interface for simplified microcontroller connection
• Single +5 V supply operation with low power consumption
• Internal laser-trimmed clock oscillator eliminates external timing components

Applications

• Battery-powered portable instrumentation systems
• Industrial process control data acquisition
• Medical equipment requiring precise low-voltage signal digitization

Procurement Notes

Verify the specific suffix '2' confirms the 0 V to +2.5 V input range and straight binary coding. Confirm the 'REEL' designation indicates tape-and-reel packaging rather than tube packaging. Ensure the component meets RoHS compliance requirements for your assembly process.

Selection Notes

Select this part when a 12-bit resolution and 0 V to +2.5 V input range are required in an 8-pin package. Consider alternative versions if bipolar inputs or higher resolutions are needed. Verify that the 117 kHz throughput rate meets system speed requirements.

Part Context

This component belongs to the AD7893 family of fast 12-bit ADCs. Variants within the family differ primarily by input voltage range and linearity grade. The ARZ-2 variant specifically targets unipolar applications with standard accuracy specifications.

Replacement Considerations

Direct pin-compatible replacements within the same series include AD7893ARZ-5 for 0 V to +5 V ranges or AD7893ARZ-10 for ±10 V ranges. Higher accuracy options like the AD7893BRZ-2 offer improved linearity but maintain the same package and interface.

FAQ

What is the digital output coding for the AD7893ARZ-2?

The AD7893ARZ-2 uses straight (natural) binary output coding.

How is the conversion cycle initiated?

Conversion is initiated on the rising edge of the CONVST input signal.

What is the maximum recommended serial clock frequency?

The maximum serial clock frequency is 8.33 MHz to achieve optimal performance.