AD7894ARZ-10REEL

Overview

The AD7894ARZ-10REEL is a 14-bit successive approximation analog-to-digital converter housed in an 8-lead SOIC 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 -10 V to +10 V and requires an external +2.5 V reference. Typical power consumption is 20 mW, with a maximum conversion time of 5 µs in high sampling mode. It offers a signal-to-noise ratio of 77 dB minimum and operates within a temperature range of -40°C to +85°C.

Feature Summary

• Integrated on-chip track/hold amplifier for accurate signal acquisition
• High-speed two-wire serial interface for data output
• Automatic power-down mode for low-power applications
• Internal laser-trimmed clock oscillator

Applications

• Battery-powered portable instrumentation
• Industrial process control systems
• Data acquisition systems requiring single-supply operation

Procurement Notes

Verify the specific suffix 'REEL' indicates tape and reel packaging when sourcing. Confirm the '-10' designation matches the required -10 V to +10 V input range. Ensure the operating temperature grade corresponds to the A version specifications. Cross-reference the manufacturer part number with official distributor catalogs to confirm current production status.

Selection Notes

Select this component for applications requiring 14-bit resolution with a wide bipolar input range. Compare against the AD7894-3 or AD7894-2 if unipolar inputs are sufficient. Consider the 5 µs conversion time and 160 kHz throughput rate for system timing requirements. Verify compatibility with the host microcontroller's serial clock frequency limits.

Part Context

This part belongs to the AD7894 family of fast, 14-bit ADCs. It serves as a pin-compatible upgrade to the 12-bit AD7895. The series includes variants with different input ranges (-10 V, -2.5 V, and 0 V to +2.5 V) and packaging options (tube and reel). All variants share the same 8-lead SOIC footprint and core architecture.

Replacement Considerations

The AD7894BR-10 is a verified alternative within the same family offering identical electrical characteristics but potentially tighter linearity specifications. Both parts share the same package and pinout.