TL431BIDR2G

Overview

The TL431BIDR2G is a three-terminal programmable shunt regulator diode from onsemi, part of the TL431A and B series. It operates as a low temperature coefficient zener reference, programmable from Vref to 36 V using two external resistors. The device features a voltage reference tolerance of ±0.4% at 25°C and supports a sink current range of 1.0 mA to 100 mA. It exhibits a typical dynamic impedance of 0.22 Ω and an equivalent full-range temperature coefficient of 50 ppm/°C. Designed for surface mount applications, it utilizes an SOIC-8 package (D suffix) and functions effectively across an operating ambient temperature range of -40°C to +85°C.

Feature Summary

• Programmable output voltage capability up to 36 V via external resistor network
• High precision voltage reference with ±0.4% tolerance at 25°C
• Temperature compensated operation ensuring stability across the full rated temperature range
• Low dynamic output impedance and low output noise voltage characteristics

Applications

• Digital voltmeters
• Power supply feedback control loops
• Op amp circuitry
• Constant current sources and sinks

Procurement Notes

Verify the specific ordering suffix 'DR2G' corresponds to the SOIC-8 tape and reel packaging configuration required for your assembly process. Confirm that the NCV or SCV prefixes are not necessary if automotive site control changes or PPAP capabilities are not mandated by your design specifications. Ensure the component meets RoHS compliance standards for your region.

Selection Notes

Select this component when a precise, adjustable shunt reference is needed with tight initial accuracy requirements. The TL431B variant offers superior tolerance compared to standard versions. Consider the thermal resistance and power dissipation limits relative to your PCB layout and ambient conditions. Verify stability boundary conditions if significant load capacitance is present in the application circuit.

Part Context

This device belongs to the TL431 family of programmable precision references manufactured by onsemi. The family includes variants with different tolerances (A, B, C series) and temperature ranges. The TL431BIDR2G specifically denotes the B-series (±0.4% tolerance), Industrial temperature grade (-40°C to +85°C), SOIC-8 package, and Tape & Reel shipping format within this extensive portfolio of voltage reference solutions.

Replacement Considerations

Compatible substitutes include other TL431B series devices such as TL431BIDG for rail packaging or TL431BVDR2G for extended temperature ranges. Cross-reference with NCV431BVDR2G if automotive qualification is required. Ensure pinout compatibility and electrical parameter alignment before substitution.