LOG2112AIDWR

Overview

The LOG2112AIDWR is a precision logarithmic amplifier manufactured by Texas Instruments, housed in a 16-pin SOIC package. It features four channels with a 45 kHz 3dB bandwidth and operates on supply voltages between 9 V and 36 V. Key electrical specifications include an input bias current of 5 pA, an input offset voltage of 1.5 mV, and a typical common-mode rejection ratio of 100 dB. The device draws 3.5 mA of operating current and functions within a temperature range of -40°C to +85°C.

Feature Summary

• Provides precise logarithmic amplification for signal processing applications
• Supports log ratio operations for dynamic range compression
• Features low input bias current for high-impedance source compatibility

Applications

• Precision measurement systems requiring wide dynamic range
• Logarithmic signal conditioning circuits
• RF and IF detection applications

Procurement Notes

Verify the specific suffix against official documentation to confirm packaging differences. The 'WR' suffix typically indicates tape-and-reel packaging, whereas other variants may use tubes. Ensure the ordering code matches the required delivery format for your assembly process. Cross-reference the manufacturer part number with the distributor catalog to confirm availability and lead times before finalizing procurement plans.

Selection Notes

Select this component when a multi-channel logarithmic response is required with high precision. Consider the 9 V minimum supply voltage constraint during power budgeting. Evaluate the 45 kHz bandwidth limit against your signal frequency requirements. Compare input offset voltage and bias current specifications against sensor output characteristics to ensure adequate accuracy for the intended application environment.

Part Context

This device belongs to the LOG2112 series of precision logarithmic amplifiers from Texas Instruments. It is designed for applications demanding accurate amplitude-to-logarithmic conversion. The family offers multiple channel configurations to support complex signal processing tasks. The LOG2112AIDWR represents a specific packaging variant within this established product line.

Replacement Considerations

Consult official substitution guides for compatible alternatives. Verify pinout compatibility and electrical parameter alignment before replacing existing designs. Check for updated revisions or discontinued status in the manufacturer's lifecycle notices.