PGA855RGTR

@@ -0,0 +1,59 @@+# PGA855RGTR++**Texas Instruments** · Instrumentation Amplifiers · VQFN-16-EP(3x3)++PGA855RGTR from Texas Instruments, in a VQFN-16-EP(3x3). 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 | A2 | input | Gain option pin 2. Digital gain selection input (MSB of the 3-bit binary gain code that selects 0.125-16 V/V). Referenced to DGND. |+| 2 | IN+ | input | Positive (noninverting) analog signal input to the instrumentation amplifier front end. Overvoltage protected to ±40 V beyond supplies. |+| 3 | IN- | input | Negative (inverting) analog signal input to the instrumentation amplifier front end. Overvoltage protected to ±40 V beyond supplies. |+| 4 | A0 | input | Gain option pin 0. Digital gain selection input (LSB of the 3-bit binary gain code that selects 0.125-16 V/V). Referenced to DGND. |+| 5 | A1 | input | Gain option pin 1. Digital gain selection input (middle bit of the 3-bit binary gain code that selects 0.125-16 V/V). Referenced to DGND. |+| 6 | VS+ | power_in | Input-stage positive supply. Single-supply range 8-36 V or dual-supply ±4 V to ±18 V (with VS-). Decouple locally to VS-. |+| 7 | LVDD | power_in | Output driver positive supply. Connect this pin to the positive supply of the ADC to protect from overdriving. Range 4.5-36 V single or ±2.25 V to ±18 V dual with LVSS. |+| 8 | NC | unconnected | No connect. Do not connect this pin to any external signal, power, or ground. |+| 9 | FDA_IN+ | input | Fully differential amplifier (output driver) positive summing-node connection. Used with external feedback resistors to set output-stage gain/topology. |+| 10 | OUT+ | output | Noninverting differential output of the output driver. Signal-output current limited to ±100 mA; short-circuit current is continuous to VSOUT/2. |+| 11 | OUT- | output | Inverting differential output of the output driver. Signal-output current limited to ±100 mA; short-circuit current is continuous to VSOUT/2. |+| 12 | FDA_IN- | input | Fully differential amplifier (output driver) negative summing-node connection. Used with external feedback resistors to set output-stage gain/topology. |+| 13 | VOCM | input | Output common-mode set input. Sets the common-mode voltage of the differential OUT+/OUT- pair (typically driven to mid-supply of the target ADC). |+| 14 | LVSS | power_in | Output driver negative supply. Connect this pin to the negative supply of the ADC to protect from overdriving. Can be GND for single-supply output stages. |+| 15 | VS- | power_in | Input-stage negative supply. Use with VS+ to provide 8-36 V single or ±4 V to ±18 V dual supply for the instrumentation amplifier input stage. |+| 16 | DGND | power_in | Ground reference for digital logic and the A0/A1/A2 gain-setting pins. |+| 17 | PAD | passive | Exposed thermal pad. Must be soldered to the PCB. Connect to a plane or large copper pour that is either floating or electrically connected to VS-, even for low-power-dissipation applications. |++## Key specifications++| Parameter | Value |+|---|---|+| Manufacturer | Texas Instruments |+| Package | VQFN-16-EP(3x3) |+| Category | Amplifiers/Comparators |+| Pins | 17 |++## Ordering variants++Same part, different packaging or reel option.++- `PGA855RGTR`+- `PGA855RGTRRGTT`++## CAD (KiCad official)++- Symbol: `PGA855RGTR`+- Footprint: `Package_DFN_QFN:QFN-16-1EP_3x3mm_P0.5mm_EP1.7x1.7mm`+- 3D model: VQFN-16-EP(3x3) (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/pga855.pdf) (41 pp, sha256 `ac37e972feda1b75`, 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/pga855rgtr-datasheet.pdf)

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