AD7893BR-5

Overview

The AD7893BR-5 is a 12-bit successive approximation analog-to-digital converter housed in an 8-pin SOIC package. It operates from a single +5 V supply and features an on-chip track/hold amplifier with a conversion time of 6 μs and a throughput rate up to 117 kHz. The device accepts a unipolar input voltage range of 0 V to +5 V and utilizes a high-speed two-wire serial interface for data output. Key electrical specifications include a signal-to-noise ratio of 72 dB, ±1/2 LSB relative accuracy, and typical power dissipation of 25 mW.

Feature Summary

• Integrated signal scaling circuitry accommodates specific analog input ranges without external components
• On-chip track/hold amplifier ensures accurate sampling at maximum throughput rates
• Two-wire serial interface simplifies connection to microcontrollers and DSP processors
• Single-supply operation reduces system complexity and supports battery-powered applications

Applications

• Portable instrumentation systems requiring low power consumption
• Industrial process control data acquisition channels
• Battery-operated measurement devices
• Microcontroller-based sensor interfaces

Procurement Notes

Verify the ordering suffix BR-5 corresponds to the specified linearity error, SNR, and SOIC package option. Confirm that the required input voltage range matches the 0 V to +5 V specification for this variant. Ensure the design accounts for the external reference voltage requirements and serial timing constraints defined in the datasheet.

Selection Notes

Select this component when a 12-bit resolution and 0 V to +5 V input range are required within an 8-pin footprint. Consider the 6 μs conversion time and 117 kHz throughput limits against system speed requirements. Evaluate the 72 dB SNR and ±1/2 LSB accuracy against application precision needs compared to other variants in the series.

Part Context

The AD7893BR-5 belongs to the AD7893 family of LC2MOS 12-bit ADCs. This family includes variants with different input ranges such as ±10 V, ±2.5 V, and 0 V to +2.5 V. The BR suffix indicates a specific grade of linearity and dynamic performance within the commercial temperature range options available for this integrated circuit series.

Replacement Considerations

Direct pin-compatible replacements within the same manufacturer's portfolio may include other AD7893 variants with adjusted input ranges or packaging options. Verify functional equivalence regarding serial interface timing and reference voltage requirements before substitution.