PGA281AIPWR from Texas Instruments, in a TSSOP-16. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin	Name	Type	Function
1	DVDD	power_in	Digital supply input (2.7 V to 5.5 V). Powers the internal digital interface (G0-G4 gain-select logic and the EF error-flag driver). Referenced to VSON.
2	EF	output	Error-flag output. Driven high (DVDD - 0.5 V) when an overload/alarm condition is detected on the input or output stages, and low (<= 0.7 V) when the device is operating in-range. Alarm-to-disable response ~30 us, alarm recovery ~5 us.
3	G4	input	Gain-select digital input, bit 4. Combined with G3:G0 selects the internal gain per Table 1 (G4 chooses between the 1 V/V and 1.375 V/V output-scale families). Logic thresholds referenced to DVDD; input current ~0.2 uA.
4	G3	input	Gain-select digital input, bit 3 (MSB of the binary input-gain code G3:G0). Selects input-stage gain from 1/8 V/V to 128 V/V per Table 1. Logic thresholds referenced to DVDD.
5	G2	input	Gain-select digital input, bit 2 of the binary input-gain code G3:G0. Logic thresholds referenced to DVDD; input current ~0.2 uA.
6	G1	input	Gain-select digital input, bit 1 of the binary input-gain code G3:G0. Logic thresholds referenced to DVDD; input current ~0.2 uA.
7	G0	input	Gain-select digital input, LSB of the binary input-gain code G3:G0. Logic thresholds referenced to DVDD; input current ~0.2 uA.
8	VON	output	Inverting signal output of the fully differential output stage. Swings rail-to-rail between VSON and VSOP (typ. within 40 mV of the rail at 2 mA load). Output resistance ~200 mOhm; drives up to 500 pF.
9	VOP	output	Noninverting signal output of the fully differential output stage. Swings rail-to-rail between VSON and VSOP; short-circuit current ~15 mA (typ) to VSOP/2. Complement of VON.
10	VOCM	input	Output common-mode voltage set input. Sets the common-mode level of the VOP/VON differential output pair. Valid range (VSON + 0.1 V) to (VSOP - 0.1 V); high-Z input (~1 GOhm), bias current typ. 3 nA. Typically tied to VSOP/2.
11	VSOP	power_in	Positive output-stage low-voltage supply (2.7 V to 5.5 V). Sets the positive rail of the VOP/VON differential outputs so they can interface directly to a low-voltage ADC. Referenced to VSON.
12	VSON	power_in	Negative output-stage low-voltage supply and negative digital supply (system ground / 0 V reference for the output and digital domains). VSOP - VSON must remain <= 6 V; also serves as the DVDD return.
13	VSP	power_in	Positive high-voltage analog supply for the input amplifier stage. Operating range +5 V to +19 V (VSP - VSN specified 10 V to 36 V, operating up to 38 V). Bypass locally to VSN.
14	INP	input	Noninverting signal input to the instrumentation amplifier. Very high input impedance (>1 GOhm, ~12 pF single-ended); valid input range (VSN + 2.5 V) to (VSP - 2.5 V). Diode-clamped to the high-voltage supplies.
15	INN	input	Inverting signal input to the instrumentation amplifier. Matches INP: >1 GOhm input impedance, valid range (VSN + 2.5 V) to (VSP - 2.5 V), diode-clamped to VSP/VSN; limit external current to <= +/-10 mA on signal-input pins.
16	VSN	power_in	Negative high-voltage analog supply for the input amplifier stage. Operating range -5 V to -19 V; VSP - VSN absolute max 40 V. Bypass locally to VSP.

Key specifications

Parameter	Value
Manufacturer	Texas Instruments
Package	TSSOP-16
Category	Op-amp/Cmp
Pins	16

Ordering variants

Same part, different packaging or reel option.

PGA281AIPWR

CAD (KiCad official)

Symbol: PGA281AIPWR
Footprint: Package_SO:TSSOP-16_4.4x5mm_P0.65mm
3D model: TSSOP-16 (KiCad packages3D, STEP)

3D model downloads

Two STEP files. Same geometry, different body top:

File	Size	Use it when
`pga281aipwr.step`	205 KB	You want the bare part, or you mark your own boards.
`pga281aipwr-etched.step`	2.5 MB	You want the part with `PGA281AIPWR` already on it.

The marking in the etched file is real recessed geometry cut into the solid, not a texture or a decal: 639 faces against 255 in the bare model. It survives export, section views, and rendering in any CAD tool, and it drops straight into KiCad or Fusion with no extra setup.

Provenance

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

Datasheet: Texas Instruments datasheet (33 pp, sha256 5d756abfae55b570, retrieved 2026-08-17, tier: manufacturer)
Extractor: ds2sf (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF