AD7895BR-2

Overview

The AD7895BR-2 is a 12-bit successive approximation analog-to-digital converter (ADC) housed in an 8-pin SOIC package. It operates from a single +5 V supply and features a serial interface with a conversion time of 3.8 μs. The device accepts a unipolar input voltage range of 0 V to +2.5 V and utilizes straight binary output coding. Key specifications include a signal-to-noise ratio of 70 dB, ±1 LSB relative accuracy, and maximum power dissipation of 20 mW. The operating temperature range spans from -40 °C to +85 °C.

Feature Summary

• Integrated on-chip track/hold amplifier for accurate signal acquisition
• High-speed two-wire serial interface for simplified microcontroller connection
• Automatic power-down mode for low-power battery applications
• Internal clock generation eliminates external timing components

Applications

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

Procurement Notes

Verify the specific suffix 'BR' indicates the SOIC package variant when sourcing. Confirm that the '-2' designation corresponds to the 0 V to +2.5 V unipolar input range required by the application circuit. Ensure the external reference voltage matches the specified +2.5 V nominal requirement for optimal performance.

Selection Notes

Select this component when a single-supply 12-bit ADC with a compact 8-pin footprint is required. The unipolar input range makes it suitable for signals already referenced to ground. Consider the 3.8 μs conversion speed against system throughput requirements. Verify compatibility with the host processor's serial clock frequency limits.

Part Context

This part belongs to the AD7895 family of fast 12-bit serial ADCs. The BR suffix specifically denotes the small outline IC (SOIC) package option, distinguishing it from the plastic DIP variants. It shares core architectural features with other series members but differs in physical form factor and potentially thermal characteristics.

Replacement Considerations

The AD7895AR-2 is a pin-compatible alternative within the same series offering identical electrical specifications in the SOIC package. Cross-reference absolute maximum ratings and pin configurations before substitution to ensure mechanical fit.