AD7893BR-2REEL7

Overview

The AD7893BR-2REEL7 is a 12-bit successive approximation analog-to-digital converter (ADC) fabricated in Analog Devices' LC2MOS process. It operates from a single +5 V supply with typical power dissipation of 25 mW. The device features an on-chip track/hold amplifier and a high-speed serial interface requiring only two wires. It accepts a unipolar input range of 0 V to +2.5 V, utilizing straight binary output coding. Conversion time is 6 μs maximum, with a track/hold acquisition time of 1.5 μs. The part is housed in an 8-pin SOIC package and supports an operating temperature range of –40 °C to +85 °C.

Feature Summary

• Integrates a 12-bit ADC, on-chip track/hold amplifier, and clock oscillator within an 8-pin package for space efficiency.
• Features a high-speed two-wire serial interface compatible with standard microcontrollers and DSP processors.
• Operates from a single +5 V supply, consuming low power suitable for battery-powered applications.
• Includes internal signal scaling to accept specific input voltage ranges without external attenuation circuitry.

Applications

• Battery-powered portable instrumentation systems
• Industrial data acquisition modules
• Process control signal conditioning

Procurement Notes

Verify the specific suffix 'BR-2REEL7' against official documentation to confirm the B-grade linearity, SOIC package, and reel packaging format. Confirm that the '-2' designation corresponds to the 0 V to +2.5 V input range variant. Ensure compatibility with existing board layouts for the 8-pin SOIC footprint before procurement.

Selection Notes

Select this component when a compact 12-bit resolution is required with a limited number of I/O pins. The fixed 0 V to +2.5 V input range eliminates the need for external signal conditioning resistors if the source signal matches this span. Consider the 6 μs conversion speed and 117 kHz throughput rate against system timing requirements.

Part Context

The AD7893 series belongs to Analog Devices' family of fast, low-power serial ADCs. The BR-2REEL7 variant specifically denotes the B-grade accuracy version with a 0 V to +2.5 V input range, packaged in small outline integrated circuits (SOIC). This model is designed to replace older parallel or multi-pin ADC solutions in space-constrained designs.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Designers should consult current Analog Devices catalogs for modern replacements, as legacy parts may have discontinued status.