AD7893ANZ-5

Overview

The AD7893ANZ-5 is a 12-bit successive approximation analog-to-digital converter (ADC) housed in an 8-pin mini-DIP 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 high-speed serial interface. The AD7893-5 variant accepts a unipolar input voltage range of 0 V to +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. Relative accuracy is ±1 LSB, with differential nonlinearity of ±1 LSB.

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 data acquisition channels requiring space-saving packaging
• Process control applications utilizing standard serial communication protocols

Procurement Notes

Verify the specific suffix 'ANZ' against the manufacturer's current ordering guide to confirm package type and compliance status. Ensure the required input voltage range matches the AD7893-5 specification (0 V to +5 V). Confirm that the operating temperature range aligns with the 'A' version rating (-40 °C to +85 °C). Cross-reference the pinout configuration to ensure compatibility with the target PCB footprint.

Selection Notes

Select this component when a compact 8-pin solution is required for 12-bit resolution applications. The AD7893-5 is appropriate for unipolar signals within the 0 V to +5 V range. Consider the 6 μs conversion time and 117 kHz throughput limits during system timing analysis. Verify that the external reference voltage meets the specified 2.375 V to 2.625 V range for optimal performance.

Part Context

The AD7893 belongs to Analog Devices' LC2MOS family of fast serial ADCs. This series combines precision bipolar circuits with low-power CMOS logic. The AD7893-5 specifically addresses unipolar input requirements, distinguishing it from bipolar variants like the AD7893-10 or AD7893-3. The 'N' suffix denotes the plastic mini-DIP package option.

Replacement Considerations

The AD7893BR-5 offers improved linearity (±1/2 LSB) and SNR (72 dB) in the same package. The AD7893AR-5 provides equivalent electrical performance in an SOIC package. Check pin compatibility before substituting between DIP and SOIC versions.