LM4121AIM5-1.2

Voltage Reference Overview

The LM4121AIM5-1.2 is a precision micropower low dropout voltage reference by Texas Instruments, delivering a fixed 1.2V output in a compact SOT-23-5 package. It features an initial accuracy of ±0.2% and a temperature coefficient of 50 ppm/°C across the -40°C to +85°C operating range. The device supports a maximum input voltage of 14V and provides up to 5mA shunt current with a typical supply current of 275µA.

Voltage Reference Feature Summary

• Precision series voltage reference architecture ensuring stable output under varying load conditions
• Micropower operation designed for battery-powered and space-constrained applications
• Low dropout capability allowing efficient regulation with minimal input-to-output voltage difference

Voltage Reference Applications

• Portable instrumentation requiring precise analog references
• Battery-operated measurement systems
• Data acquisition circuits needing stable voltage sources

Voltage Reference Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm RoHS compliance status and check for end-of-life notifications, as availability may be restricted. Ensure packaging specifications match design requirements for surface-mount assembly processes.

Voltage Reference Selection Notes

Select this model when a fixed 1.2V reference with high initial accuracy is required. Consider the ±0.2% tolerance and 50 ppm/°C drift for precision applications. Evaluate power consumption constraints against the 275µA supply current and verify thermal management within the specified temperature range.

Voltage Reference Part Context

Part of the LM412x family of precision micropower voltage references. Designed for applications demanding high stability and low noise in small form factors. Complements other TI PMIC solutions for complete power management designs.

Voltage Reference Replacement Considerations

LM4121AIM5X-1.2/NOPB: Direct equivalent with tape-and-reel packaging option.