REF2940AIDBZT from Texas Instruments, in a SOT-23. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin	Name	Type	Function
1	IN	power_in	Input supply voltage; VIN must be at least VREF + 0.05 V and at most 5.5 V.
2	OUT	power_out	Reference output voltage, 4.096 V for the REF2940.
3	GND	power_in	Ground reference pin for the reference.

Key specifications

Parameter	Value
Manufacturer	Texas Instruments
Package	SOT-23
Category	Power Management (PMIC)
Pins	3

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter	Symbol	Min	Typ	Max	Unit	Conditions	Page
Output voltage	VOUT	4.014	4.096	4.178	V		5
Initial accuracy				2	%		5
Output voltage noise f = 0.1 Hz to 10 Hz			45		µVPP	f = 0.1 Hz to 10 Hz	5
Voltage noise f = 10 Hz to 10 kHz			128		µVrms	f = 10 Hz to 10 kHz	5
Line regulation			160	410	µV/V	VREF + 50 mV ≤ VIN ≤ 5.5 V	5
Output voltage temperature drift	dVOUT/dT		35	100	ppm/°C	-40°C ≤ TA ≤ 125°C	5
Output current	ILOAD			25	mA		5
Long-term stability 0 to 1000 H			24		ppm	0 to 1000 H	5
Long-term stability 1000 to 2000 H			15		ppm	1000 to 2000 H	5
Load regulation	dVOUT/dILOAD		3	100	µV/mA	0 mA < ILOAD < 25 mA, VIN = VREF + 500 mV	5
Thermal hysteresis	dT		25	100	ppm		6
Dropout voltage	VIN, VOUT		1	50	mV		6
Short-circuit current	ISC		45		mA		6
Turnon settling time			120		µs	to 0.1% at VIN = 5 V with CL = 0	6
Supply voltage	VS			5.5	V	IL = 0	6
Supply voltage over temperature	VS			5.5	V	-40°C ≤ TA ≤ 125°C	6
Quiescent current	IQ		42	50	µA		6
Quiescent current over temperature	IQ			59	µA	-40°C ≤ TA ≤ 125°C	6
Specified temperature range	TA	-40		125	°C		6
Input voltage	VIN			5.5	V		4
Load current	ILOAD			25	mA		4
Operating temperature	TA	-40		125	°C		4
Supply voltage V+ to V-				7	V		4
Lead temperature				300	°C	soldering, 10 s	4
Operating temperature		-40		125	°C		4
Junction temperature				150	°C		4
Storage temperature	Tstg	-65		150	°C		4
Human-body model ESD	V(ESD)	-4000		4000	V	HBM, per ANSI/ESDA/JEDEC JS-001	4
Charged-device model ESD	V(ESD)	-1500		1500	V	CDM, per JEDEC JESD22-C101	4
Junction-to-ambient thermal resistance	RθJA		297.3		°C/W	DBZ (SOT-23) thermal information table	4
Junction-to-case (top) thermal resistance	RθJC(top)		128.5		°C/W	DBZ (SOT-23) thermal information table	4
Junction-to-board thermal resistance	RθJB		91.7		°C/W	DBZ (SOT-23) thermal information table	4
Thermal resistance for SOT-23 surface-mount	RθJC		110		°C/W		6
Thermal resistance junction-to-ambient	RθJA		336		°C/W		6

CAD (KiCad official)

Symbol: REF2940AIDBZT
Footprint: Package_TO_SOT_SMD:SOT-23
3D model: SOT-23 (KiCad packages3D, STEP)
3D model files: ref2940aidbzt-etched.step / ref2940aidbzt-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ref2940aidbzt.step / ref2940aidbzt.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

Datasheet: Texas Instruments datasheet (27 pp, sha256 8ea634de078f1bc7, retrieved 2026-11-05, tier: manufacturer)
Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-haiku-5-5 (text), consensus claude-sonnet-5-5 (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF

REF2940AIDBZT

Verified REF2940AIDBZT

Verification log 1 record

3D Model

Symbol & Footprint

Schematic Symbol

PCB Footprint

Datasheet

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