ADS131M03QPWRQ1 from Texas Instruments, in a TSSOP-20. 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	AVDD	power_in	Analog supply; connect a 1-µF capacitor to AGND (2.7 V to 3.6 V in normal modes).
2	AGND	power_in	Analog ground.
3	AIN0P	input	Positive analog input 0.
4	AIN0N	input	Negative analog input 0.
5	AIN1N	input	Negative analog input 1.
6	AIN1P	input	Positive analog input 1.
7	AIN2P	input	Positive analog input 2.
8	AIN2N	input	Negative analog input 2.
9	NC	unconnected	Leave unconnected or connect to AGND.
10	NC	unconnected	Leave unconnected or connect to AGND.
11	SYNC/RESET	input	Conversion synchronization or system reset; active low.
12	CS	input	Chip select; active low.
13	DRDY	output	Data ready; active low.
14	SCLK	input	Serial data clock.
15	DOUT	output	Serial data output; high impedance when CS is high.
16	DIN	input	Serial data input.
17	CLKIN	input	Main clock input.
18	CAP	power_out	Digital LDO regulator output; connect a 220-nF capacitor to DGND.
19	DGND	power_in	Digital ground.
20	DVDD	power_in	Digital I/O supply; connect a 1-µF capacitor to DGND (2.7 V to 3.6 V).

Key specifications

Parameter	Value
Manufacturer	Texas Instruments
Package	TSSOP-20
Category	ADC/DAC/Data Conversion
Pins	20

Electrical characteristics

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

Parameter	Symbol	Min	Typ	Max	Unit	Conditions	Page
AVDD to AGND	AVDD	-0.3		3.9	V		4
AGND to DGND		-0.3		0.3	V		4
DVDD to DGND	DVDD	-0.3		3.9	V		4
DVDD to DGND, CAP tied to DVDD	DVDD	-0.3		2.2	V	CAP tied to DVDD	4
CAP to DGND	CAP	-0.3		2.2	V		4
Input current		-10		10	mA	Continuous, all pins except power-supply pins	4
Junction temperature	TJ			150	°C		4
Storage temperature	Tstg	-60		150	°C		4
Analog power supply, normal modes	AVDD	2.7	3	3.6	V	AVDD to AGND, normal operating modes	5
Analog power supply, standby and current-detect	AVDD	2.4	3	3.6	V	standby and current-detect modes	5
Digital power supply	DVDD	2.7	3	3.6	V	DVDD to DGND	5
Digital power supply, LDO bypassed	DVDD	1.65	1.8	2	V	DVDD shorted to CAP (digital LDO bypassed)	5
External clock frequency, high-resolution mode	fCLKIN	0.3	8.192	8.4	MHz	High-resolution mode	5
External clock frequency, low-power mode	fCLKIN	0.3	4.096	4.15	MHz	Low-power mode	5
External clock frequency, very-low-power mode	fCLKIN	0.3	2.048	2.08	MHz	Very-low-power mode	5
Operating ambient temperature	TA	-40		125	°C		5
Junction-to-ambient thermal resistance	RθJA		94.9		°C/W	PW (TSSOP) 20 pins	5
Junction-to-case (top) thermal resistance	RθJC(top)		34.9		°C/W		5
Junction-to-board thermal resistance	RθJB		46.4		°C/W		5
Logic input level, low	VIL			0.2	V	max printed as 0.2 DVDD	7
Logic input level, high	VIH	0.8			V	min printed as 0.8 DVDD	7
Logic output level, low	VOL			0.2	V	IOL = -1 mA; max printed as 0.2 DVDD	7
Logic output level, high	VOH	0.8			V	IOH = 1 mA; min printed as 0.8 DVDD	7
Input current	IIN	-1		1	µA	DGND < VDigital Input < DVDD	7
Analog supply current, high-resolution	IAVDD		2.7	3.2	mA	High-resolution mode	7
Analog supply current, low-power	IAVDD		1.5	1.7	mA	Low-power mode	7
Analog supply current, very-low-power	IAVDD		0.8	0.97	mA	Very-low-power mode	7
Digital supply current, high-resolution	IDVDD		0.3	0.4	mA	High-resolution mode	7
Digital supply current, low-power	IDVDD		0.16	0.21	mA	Low-power mode	7
Digital supply current, very-low-power	IDVDD		0.09	0.15	mA	Very-low-power mode	7
Dynamic range, gain = 1		99	102		dB	Gain = 1	6
Internal reference voltage	VREF		1.2		V		7
Internal reference accuracy		-0.1		0.1	%	TA = 25°C	7
Internal reference temperature drift			7.5	20	ppm/°C		7
SCLK period	tc(SC)	40			ns	2.7 V ≤ DVDD ≤ 3.6 V	8
Pulse duration, SCLK low	tw(SCL)	20			ns	2.7 V ≤ DVDD ≤ 3.6 V	8
Pulse duration, CS high	tw(CSH)	15			ns	2.7 V ≤ DVDD ≤ 3.6 V	8
Propagation delay, SCLK rising edge to valid new DOUT	tp(SCDO)			20	ns	2.7 V ≤ DVDD ≤ 3.6 V	9
Power-on-reset time	tPOR			250	µs	Measured from supplies at 90% to first DRDY rising edge	9

CAD (KiCad official)

Symbol: ADS131M03QPWRQ1
Footprint: Package_SO:TSSOP-20_4.4x6.5mm_P0.65mm
3D model: TSSOP-20 (KiCad packages3D, STEP)
3D model files: ads131m03qpwrq1-etched.step / ads131m03qpwrq1-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ads131m03qpwrq1.step / ads131m03qpwrq1.glb are the bare package body.

Provenance

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

Datasheet: Texas Instruments datasheet (88 pp, sha256 6e04a44212d27221, retrieved 2026-10-30, tier: manufacturer)
Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-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

ADS131M03QPWRQ1

Verified ADS131M03QPWRQ1

Verification log 1 record

3D Model

Symbol & Footprint

Schematic Symbol

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Datasheet

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