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Texas Instruments LM4041DIDBZR — Analog & Data Acquisition

Texas Instruments LM4041DIDBZR Shunt Voltage Reference

MPNLM4041DIDBZR
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Texas Instruments LM4041 series precision shunt voltage reference, adjustable output type, ±1% tolerance, 12 mA output current, 80 µA cathode current, SOT-23-3 surface-mount package, -40°C to 85°C operating temperature.

$0.3212Ref. price · indicative, final on quote
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

LM4041DIDBZR specifications
ParameterValue
Output typeAdjustable
MountingSurface Mount
Reference typeShunt
Voltage - output10 V
Voltage - output (Min (Fixed))1.233V
Output current12 mA
Current - cathode80 µA
Operating temperature-40°C~85°C(TA)
PackageTape & Reel (TR); Cut Tape (CT)
Tolerance±1%
CaseTO-236-3, SC-59, SOT-23-3
Noise - 10Hz to 10kHz20µVrms
Temperature coefficient150ppm/°C

Product details

Adjustable shunt reference — 1.233 V to 10 V output range

Its output is set with two external resistors from a minimum of 1.233 V up to 10 V, making it a flexible drop-in for any rail that needs a stable voltage threshold — ADC reference, comparator trip point, or regulator feedback bias.

±1 % tolerance and 150 ppm/°C drift — the accuracy envelope

Initial output tolerance is ±1 %, which sets the uncalibrated accuracy floor for an 8- or 10-bit ADC reference without trimming.

12 mA output, 80 µA cathode current — load and bias budgeting

The shunt can sink up to 12 mA of output current, which covers the bias for a typical microcontroller ADC or a couple of op-amp inputs. The cathode current is 80 µA — this is the minimum current needed to keep the reference in regulation, so the series resistor from the supply must be sized to deliver at least that much at the lowest supply voltage. A 1 kΩ resistor from a 5 V rail gives roughly 3.8 mA bias, well above the floor.

Frequently asked questions

How do I adjust the output voltage of the LM4041DIDBZR?

The output is set with two external resistors: a feedback divider from the output pin to the adjust pin and a resistor from the adjust pin to ground. The formula is Vout = Vref × (1 + R1/R2) where Vref is 1.233 V. Choose R2 in the 10 kΩ to 100 kΩ range to keep bias current negligible.

Can LM4041DIDBZR replace LM4041AIDBZR?

Both are adjustable shunt references in the same SOT-23-3 package and pinout. The key difference is the initial tolerance grade: the 'D' variant is ±1 %, while the 'A' variant is ±0.1 %. If your design can tolerate the wider tolerance, the DIDBZR is a direct drop-in replacement for the AIDBZR.