AD7895ANZ-10

Overview

The AD7895ANZ-10 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 a built-in track/hold amplifier, internal clock, and high-speed serial interface. The device supports an input voltage range of ±10 V with a maximum conversion time of 3.8 μs in Mode 1 operation. Key electrical specifications include a signal-to-noise ratio of 70 dB, differential nonlinearity of ±1 LSB, and integral nonlinearity of ±1 LSB. Power consumption is limited to 20 mW maximum, with an automatic power-down mode reducing current to 5 μA.

Feature Summary

• Integrated signal scaling allows direct handling of ±10 V analog inputs while operating from a single +5 V supply.
• High-speed serial interface utilizes only two wires for data transmission, simplifying microcontroller connections.
• On-chip track/hold amplifier ensures accurate digitization of input signals up to the Nyquist rate.
• Automatic power-down mode activates after conversion completion to minimize energy usage in portable applications.

Applications

• Battery-powered instrumentation requiring low power consumption
• Industrial process control systems with bipolar signal inputs
• Data acquisition modules interfacing with microcontrollers

Procurement Notes

Verify the specific suffix '10' corresponds to the ±10 V input range requirement. Confirm the 'ANZ' designation indicates the plastic DIP-8 package variant. Ensure the external reference voltage matches the specified +2.5 V nominal value for optimal accuracy. Check RoHS compliance status if required by local regulations.

Selection Notes

Select this component when a single-supply ADC with a wide bipolar input range is needed. The ±10 V range eliminates the need for external signal conditioning resistors for standard industrial sensors. Consider the 3.8 μs conversion speed against system throughput requirements. Evaluate the serial interface compatibility with the target processor's available pins.

Part Context

The AD7895 series includes variants with different input ranges: -2 for 0 V to +2.5 V, -3 for ±2.5 V, and -10 for ±10 V. All share the same SAR architecture and pinout. The ANZ suffix specifically denotes the through-hole PDIP-8 package, distinguishing it from surface-mount SOIC options like ARZ.

Replacement Considerations

The AD7894 is noted as a 14-bit pin-compatible upgrade within the same family. Verify that the increased resolution meets system needs without altering board layout. Other series members (-2, -3) are not electrically compatible due to differing input ranges.