PGA281AIPWR

@@ -0,0 +1,56 @@+# PGA281AIPWR++**Texas Instruments** · Precision OpAmps · TSSOP-16++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++- `PGA281AIPWRAIPW`+- `PGA281AIPWRAIPWR`++## CAD (KiCad official)++- Symbol: `PGA281AIPWR`+- Footprint: `Package_SO:TSSOP-16_4.4x5mm_P0.65mm`+- 3D model: TSSOP-16 (KiCad packages3D, STEP)++## Provenance++Data extracted from the manufacturer datasheet, not a distributor listing:++- **Datasheet:** [Texas Instruments datasheet](https://www.ti.com/lit/ds/symlink/pga281ai.pdf) (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](docs/pga281aipwr-datasheet.pdf)

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