AD7894ARZ-10REEL7

Overview

The AD7894ARZ-10REEL7 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 maximum conversion time of 5 µs. The device supports a high-speed serial interface with a maximum clock frequency of 16 MHz, enabling throughput rates up to 160 kHz. It accepts bipolar analog input signals ranging from -10 V to +10 V and requires an external +2.5 V reference voltage. Typical power consumption is 20 mW, with an automatic power-down mode reducing dissipation to approximately 15 mW during standby.

Feature Summary

• Integrated on-chip track/hold amplifier ensures accurate signal acquisition for high-frequency inputs.
• High-speed two-wire serial interface simplifies connection to microprocessors and digital logic.
• Automatic power-down mode activates after conversion completion to minimize energy usage.
• Internal laser-trimmed clock oscillator eliminates the need for external timing components.

Applications

• Battery-powered portable instrumentation systems
• Industrial data acquisition modules requiring high resolution
• Process control loops with bipolar sensor interfaces

Procurement Notes

Verify that the specific suffix 'REEL7' corresponds to tape-and-reel packaging when sourcing components. Confirm the '-10' designation matches the required -10 V to +10 V input range specification. Ensure the operating temperature grade aligns with the system's environmental requirements.

Selection Notes

Select this component for applications demanding 14-bit resolution within a compact surface-mount footprint. Consider the -10 variant specifically for bipolar signal conditioning needs. Evaluate the serial interface timing constraints against the host processor's capabilities to ensure reliable data retrieval at target sampling rates.

Part Context

This part belongs to the AD7894 family of fast, low-power ADCs. It serves as a pin-compatible upgrade to the 12-bit AD7895, offering increased resolution without altering the physical package dimensions. The series is designed for space-constrained designs requiring efficient single-supply operation.

Replacement Considerations

The AD7894BRZ-10 offers identical functionality with tighter linearity specifications. The AD7894ARZ-3 provides the same package and interface but supports a reduced -2.5 V input range.