AD7894ARZ-10

Overview

The AD7894ARZ-10 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 with a conversion time of 5 µs. The device accepts bipolar analog input signals within the range of -10 V to +10 V. It utilizes a high-speed two-wire serial interface for data output, supporting throughput rates up to 160 kHz. The component consumes typically 20 mW during operation and includes an automatic power-down mode to reduce energy usage between conversions.

Feature Summary

• Integrated signal scaling circuitry enables direct interfacing with ±10 V analog sources without external conditioning components.
• On-chip track/hold amplifier ensures accurate sampling of high-frequency signals by maintaining signal integrity during the conversion cycle.
• Two-wire serial interface simplifies digital connection to microprocessors or DSPs using standard clock and data lines.
• Automatic power-down functionality allows the device to enter low-power standby immediately after conversion completion.

Applications

• Battery-powered portable instrumentation requiring low power consumption
• Industrial process control systems utilizing bipolar voltage sensors
• Data acquisition modules for environmental monitoring

Procurement Notes

Verify the specific suffix '10' corresponds to the required ±10 V input range before ordering. Confirm that the system design accommodates the 8-lead SOIC package dimensions and thermal requirements. Ensure the external reference voltage connected to REF IN is stable at +2.5 V to maintain specified accuracy levels.

Selection Notes

Select this model when a bipolar input range of ±10 V is necessary. Compare against AD7894BR-10 if tighter linearity specifications are required. Consider the AD7894-3 or AD7894-2 variants if the application involves smaller voltage ranges such as ±2.5 V or 0 V to +2.5 V respectively.

Part Context

This component belongs to the AD7894 family of fast, 14-bit serial ADCs. It serves as a pin-compatible upgrade to the 12-bit AD7895, offering higher resolution in the same compact footprint. The family shares common architectural features including SAR conversion and internal clocking, differentiated primarily by input voltage ranges and linearity grades.

Replacement Considerations

AD7894BR-10 offers improved linearity specifications while maintaining identical pinout and electrical characteristics.