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Analog Devices LT1009IZ#PBF — Analog & Data Acquisition

LT1009IZ#PBF Shunt Voltage Reference, 2.5V ±0.2%, TO-92-3

MPNLT1009IZ#PBF
End of Life

Linear Technology LT1009IZ#PBF precision shunt voltage reference, fixed 2.5 V output, ±0.2% initial tolerance, 35 ppm/°C temperature coefficient, 10 mA output current, through-hole TO-92-3 package, -40°C to 85°C operating range.

$7.8Ref. price · indicative, final on quote
PackagingTO-226-3, TO-92-3 (TO-226AA)
RoHSROHS3 Compliant
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

LT1009IZ#PBF specifications
ParameterValue
Output typeFixed
MountingThrough Hole
Reference typeShunt
Voltage - output (Min (Fixed))2.5V
Output current10 mA
Current - cathode400 µA
Operating temperature-40°C ~ 85°C (TA)
PackageBulk
Tolerance±0.2%
CaseTO-226-3, TO-92-3 (TO-226AA)
Temperature coefficient35ppm/°C

Product details

Precision 2.5 V shunt reference for industrial bias and ADC references

The LT1009IZ#PBF from Linear Technology is a precision shunt voltage reference delivering a fixed 2.5 V output with ±0.2% initial tolerance and a temperature coefficient of 35 ppm/°C. Designed as a shunt (two-terminal) reference, it requires only an external resistor to set the bias current, simplifying the BOM for generating a stable voltage rail in mixed-signal and control circuits.

The ±0.2% tolerance and 35 ppm/°C temperature coefficient keep the output stable over temperature.

Shunt topology — bias resistor sets the operating point

As a shunt reference, the LT1009IZ#PBF regulates by sinking current from the supply through an external resistor. The cathode current must stay above 400 µA to maintain regulation.

Through-hole TO-92-3 — legacy footprint, easy retrofit

The TO-92-3 through-hole package mates with standard prototyping boards and existing PCB layouts.

For procurement teams freezing a BOM, this part is safe to specify into production without an imminent discontinuation risk.

Frequently asked questions

How to use LT1009IZ#PBF in a circuit?

Connect the cathode to the load and the anode to ground. Place a resistor from the positive supply to the cathode to bias the reference above 400 µA cathode current. The output voltage is fixed at 2.5 V. No output capacitor is needed for stability.

Is LT1009IZ#PBF compatible with 3.3V systems?

Yes. With a 2.5 V output and a minimum cathode current of 400 µA, a 3.3 V supply leaves 0.8 V across the bias resistor. For a 1 mA total current (load + cathode), a 680 Ω resistor works. The 10 mA output current limit is sufficient for most 3.3 V ADC reference inputs.