AD7895ANZ-3

Overview

The AD7895ANZ-3 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 features an on-chip track/hold amplifier, internal clock, and high-speed serial interface. The device supports a bipolar input voltage range of ±2.5 V with an external reference input. Key electrical parameters include a maximum conversion time of 3.8 μs, a throughput rate up to 192 kS/s, and a signal-to-noise ratio of 70 dB. Power consumption is limited to 20 mW maximum, with an automatic power-down mode reducing current to 5 μA.

Feature Summary

• Single +5 V supply operation with low power consumption suitable for battery-powered applications
• On-chip track/hold amplifier providing high input impedance and fast acquisition times
• High-speed two-wire serial interface allowing easy integration with microcontrollers
• Automatic power-down mode that activates after conversion completion

Applications

• Portable instrumentation systems requiring low power and small form factor
• Industrial process control loops utilizing bipolar signal inputs
• Data acquisition modules interfacing with digital signal processors

Procurement Notes

Verify the specific suffix 'ANZ-3' against the manufacturer's ordering guide to confirm the temperature range and package type. Ensure the design accommodates the required ±2.5 V input range and external reference voltage. Confirm availability through authorized distributors as stock levels vary by region.

Selection Notes

Select this component when a 12-bit resolution and ±2.5 V bipolar input range are required in an 8-pin DIP package. Compare against the AD7895-2 for unipolar applications or the AD7895-10 for wider ±10 V ranges. Consider the SOIC variant if surface mount technology is preferred over through-hole mounting.

Part Context

The AD7895 series comprises three variants distinguished by their analog input voltage ranges: ±10 V, ±2.5 V, and 0 V to +2.5 V. All variants share identical architecture, pinouts, and performance characteristics regarding speed and accuracy. The AD7895ANZ-3 specifically denotes the through-hole mini-DIP version configured for the ±2.5 V input range.

Replacement Considerations

The AD7894 is a 14-bit pin-compatible upgrade offering higher resolution within the same package. For unipolar applications, the AD7895-2 provides the same functionality with a 0 V to +2.5 V input range. Surface mount equivalents are available in the SOIC package.