AD7893BRZ-2REEL7

Overview

The AD7893BRZ-2REEL7 is a 12-bit successive approximation register (SAR) analog-to-digital converter (ADC) fabricated in Analog Devices' LC2MOS process. It operates from a single +5 V supply and consumes typically 25 mW. The device features an on-chip track/hold amplifier, internal clock, and a high-speed two-wire serial interface. The BRZ suffix indicates the B version with ±0.5 LSB relative accuracy and 72 dB SNR, housed in an 8-pin SOIC package. The -2 variant supports a unipolar input range of 0 V to +2.5 V with straight binary output coding.

Feature Summary

• Integrated signal scaling for direct connection to 0 V to +2.5 V analog inputs without external resistors
• On-chip track/hold amplifier ensures accurate digitization of full-scale sine waves up to 117 kHz throughput
• Two-wire serial interface simplifies microcontroller and DSP connectivity using standard SCLK and SDATA lines

Applications

• Battery-powered portable instrumentation requiring low power consumption
• Industrial data acquisition systems utilizing single-supply operation
• Process control applications needing fast 12-bit conversion with serial communication

Procurement Notes

Verify the specific ordering suffix against the manufacturer's current datasheet revision to confirm package type and temperature range. Ensure the component matches the required input voltage range specification for the system design. Cross-reference the part number with official distributor catalogs to confirm availability status and lead times prior to procurement planning.

Selection Notes

Select this component when a compact 8-pin solution is required for 12-bit sampling at speeds up to 117 kHz. The AD7893BRZ-2REEL7 is suitable for applications demanding a 0 V to +2.5 V input range and single +5 V supply operation. Consider the serial interface timing constraints and the need for an external 2.5 V reference source when designing the circuit.

Part Context

This part belongs to the AD7893 family of fast 12-bit ADCs available in multiple input ranges and packages. The BRZ designation specifies the commercial temperature range (-40°C to +85°C), improved linearity (±0.5 LSB), and higher SNR (72 dB) compared to the AN/AR variants. The REEL7 suffix denotes tape and reel packaging for automated assembly.

Replacement Considerations

Direct pin-compatible replacements within the same family include the AD7893BN-2 and AD7893AN-2, which differ primarily in accuracy and noise specifications. Other variants such as the AD7893-5 or AD7893-10 offer different input voltage ranges but require software adjustments for code interpretation.