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Texas Instruments ATL431LIBIDQNR — Analog & Data Acquisition

TI ATL431LIBIDQNR Shunt Reference, 0.5% Tolerance, 4-X2SON

MPNATL431LIBIDQNR
Active

Texas Instruments ATL431LIBIDQNR adjustable shunt voltage reference, ±0.5% tolerance, 15 mA output current, 80 µA cathode current, 4-X2SON (1x1 mm) package, surface mount, -40°C to 85°C.

$0.6200Ref. price · indicative, final on quote
Texas Instruments ATL431LIBIDQNR datasheet (PDF)
Packaging4-XDFN Exposed Pad
RoHSROHS3 Compliant
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

ATL431LIBIDQNR specifications
ParameterValue
Output typeAdjustable
MountingSurface Mount
Reference typeShunt
Voltage - output36 V
Voltage - output (Min (Fixed))2.5V
Output current15 mA
Current - cathode80 µA
Operating temperature-40°C ~ 85°C (TA)
PackageTape & Reel (TR) Cut Tape (CT)
Tolerance±0.5%
Case4-XDFN Exposed Pad

Product details

Tighter tolerance than the standard TL431

The ATL431LIBIDQNR is an adjustable shunt voltage reference from Texas Instruments, part of the ATL431 family. Its ±0.5% tolerance is a significant step up from the ±2.2% of the widely used TL431IDBVR — meaning the output voltage stays closer to the programmed value over temperature and load, without external trimming. Minimum cathode current is just 80 µA, so the reference can be biased with a single high-value resistor in low-power loops — a common need in battery-monitor or energy-harvesting circuits where every microamp counts.

Housed in a 4-X2SON (1x1 mm) package with an exposed pad — the 4-XDFN footprint is tiny, about a third the area of a SOT-23. This wide compliance range lets the reference sit directly on a 24 V industrial bus or a 12 V automotive rail without an additional regulator.

Active lifecycle — no end-of-life risk

ROHS3 compliant, which covers all six original RoHS substances plus the four phthalates. No additional compliance documentation (REACH, UL, IEC) is cited in the listing.

Frequently asked questions

What is the closest functional second-source to ATL431LIBIDQNR?

The TL431IDBVR is the closest functional second-source — same adjustable shunt topology, same 4-XDFN package option, and same operating temperature range. The key difference is tolerance: the ATL431LIBIDQNR is ±0.5%, while the TL431IDBVR is ±2.2%. If the BOM can tolerate the wider tolerance, the TL431IDBVR is a drop-in replacement without layout changes.

Will ATL431LIBIDQNR drop into a board originally designed for TL431IDBVR?

Yes — both parts share the same 4-XDFN package footprint and pinout (adjustable shunt reference). The TL431IDBVR is listed with a ±2.2% tolerance versus the ATL431LIBIDQNR's ±0.5%, but the electrical interface is identical. No rewiring or board spin is required.