AD7894BRZ-10REEL7

Overview

The AD7894BRZ-10REEL7 is a 14-bit successive approximation analog-to-digital converter (ADC) housed in an 8-lead SOIC package. It operates from a single +5 V supply and features a high-speed serial interface with a maximum throughput rate of 160 kHz. The device includes an on-chip track/hold amplifier, internal clock, and signal scaling circuitry for bipolar input ranges. Key electrical specifications include a conversion time of 5 µs, a typical power dissipation of 20 mW, and a Signal to (Noise + Distortion) Ratio of 77 dB minimum. The part supports an analog input range of ±10 V and functions within a temperature range of -40°C to +85°C.

Feature Summary

• Integrated signal scaling allows direct interfacing with ±10 V analog inputs while operating from a single +5 V supply.
• Features a proprietary automatic power-down mode that reduces power consumption by entering sleep state after conversion completion.
• Provides a two-wire serial interface utilizing SCLK and SDATA pins for simplified microprocessor connectivity.

Applications

• Battery-powered or portable instrumentation requiring low power consumption.
• Industrial process control systems utilizing bipolar voltage signals.
• Data acquisition systems requiring fast 14-bit resolution with serial communication.

Procurement Notes

Verify the specific suffix REEL7 indicates tape and reel packaging when sourcing components. Confirm the B version designation corresponds to the required linearity specifications, specifically the Integral Nonlinearity (INL) of ±1.5 LSB. Ensure the ordering documentation matches the Analog Devices manufacturer part number exactly to avoid confusion with other input range variants like the AD7894-3 or AD7894-2.

Selection Notes

Select this component when a single-supply operation is required for bipolar signal conditioning without external negative rails. The AD7894BRZ-10REEL7 is suitable for applications needing ±10 V input range capability integrated directly into the ADC architecture. Consider the 160 kHz maximum throughput rate against system sampling requirements. Verify that the external reference voltage can be maintained at +2.5 V for optimal performance.

Part Context

This component belongs to the AD7894 family of fast, 14-bit serial ADCs manufactured by Analog Devices. The BRZ-10 variant specifically denotes the industrial temperature grade (B version) with the ±10 V input range option. The REEL7 suffix identifies the bulk packaging format intended for automated surface-mount assembly processes.

Replacement Considerations

The AD7894ARZ-10REEL7 serves as a pin-compatible alternative within the same series, offering identical functionality but potentially differing in linearity accuracy grades. Designers should verify INL and gain error specifications when substituting between A and B versions to ensure compliance with system tolerance requirements.