# TP1281L1-TR

**3PEAK** · Operational Amplifier · SOT-23-5

TP1281L1-TR from 3PEAK, in a SOT-23-5. 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 | Out | output | Amplifier output, which swings rail-to-rail; the output enters high impedance when die temperature reaches around 170°C and recovers at around 150°C. |
| 2 | -VS | power_in | Negative power supply; the input common-mode range extends to V-, and supply span (+VS to -VS) is 4.5 V to 36 V with a 40 V absolute maximum. |
| 3 | +In | input | Noninverting input; the common-mode input range extends to V- and is specified up to (V+) - 1.5 V. |
| 4 | -In | input | Inverting input; input current is limited to ±10 mA absolute maximum. |
| 5 | +VS | power_in | Positive power supply; supply voltage range is 4.5 V to 36 V with a 40 V absolute maximum across (+VS) - (-VS). |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | 3PEAK |
| Package | SOT-23-5 |
| Category | Amplifiers/Comparators |
| Pins | 5 |

## Electrical characteristics

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

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Supply Voltage (+VS), (−VS) |  |  |  | 40 | V |  | 7 |
| Input Current: +IN, -IN |  | -10 |  | 10 | mA |  | 7 |
| TJ Maximum Junction Temperature | TJ |  |  | 150 | °C |  | 7 |
| TA Operating Temperature Range | TA | -40 |  | 125 | °C |  | 7 |
| TSTG Storage Temperature Range | TSTG | -65 |  | 150 | °C |  | 7 |
| TL Lead Temperature (Soldering 10 sec) | TL |  |  | 260 | °C | Soldering 10 sec | 7 |
| Supply Voltage Range | VS | 4.5 |  | 36 | V |  | 8 |
| Quiescent Current per Amplifier | IQ |  | 1.5 | 2 | mA | VS = 30 V, TP1281 | 8 |
| Quiescent Current per Amplifier | IQ |  |  | 3 | mA | -40°C to 125°C | 8 |
| Power Supply Rejection Ratio | PSRR | 105 | 130 |  | dB | VS = 4.5 V to 36 V | 8 |
| Power Supply Rejection Ratio | PSRR | 100 |  |  | dB | -40°C to 125°C | 8 |
| Input Offset Voltage | VOS | -100 | 50 | 100 | μV | VS = 30 V, VCM = 15 V | 8 |
| Input Offset Voltage | VOS | -400 |  | 400 | μV | -40°C to 85°C | 8 |
| Input Offset Voltage | VOS | -600 |  | 600 | μV | -40°C to 125°C | 8 |
| Input Offset Voltage | VOS | -150 | 50 | 150 | μV | VS = 5 V, VCM = 2.5 V | 8 |
| Input Offset Voltage | VOS | -500 |  | 500 | μV | -40°C to 85°C | 8 |
| Different Input Current | IIN |  | 10 | 100 | nA | VS = 36 V, VID = 36 V | 8 |
| Different Input Current | IIN |  | 100 | 300 | nA | -40°C to 125°C | 8 |
| Input Bias Current | IB |  |  | 80 | pA | -40°C to 85°C | 8 |
| Input Bias Current | IB |  |  | 1000 | pA | -40°C to 125°C | 8 |
| Open-loop Voltage Gain | Av | 120 | 130 |  | dB | VS = 30 V, VOUT = 0.5 V to 29.5 V | 9 |
| Open-loop Voltage Gain | Av | 105 |  |  | dB | -40°C to 125°C | 9 |
| Common Mode Rejection Ratio | CMRR | 100 | 125 |  | dB | VCM = 0.5 V to 28.5 V | 9 |
| Common Mode Rejection Ratio | CMRR | 95 |  |  | dB | -40°C to 125°C | 9 |
| Output Swing from Positive Rail | VOH |  | 5 | 15 | mV | RLOAD = 100 kΩ to VS/2 | 9 |
| Output Swing from Positive Rail | VOH |  |  | 30 | mV | -40°C to 85°C | 9 |
| Output Swing from Positive Rail | VOH |  |  | 40 | mV | -40°C to 125°C | 9 |
| Output Swing from Positive Rail | VOH |  | 50 | 80 | mV | RLOAD = 10 kΩ to VS/2 | 9 |
| Output Swing from Positive Rail | VOH |  |  | 120 | mV | -40°C to 85°C | 9 |
| Output Swing from Positive Rail | VOH |  |  | 130 | mV | -40°C to 125°C | 9 |
| Output Swing from Negative Rail | VOL |  | 5 | 10 | mV | RLOAD = 100 kΩ to VS/2 | 9 |
| Output Swing from Negative Rail | VOL |  |  | 20 | mV | -40°C to 85°C | 9 |
| Output Swing from Negative Rail | VOL |  |  | 25 | mV | -40°C to 125°C | 9 |
| Output Swing from Negative Rail | VOL |  | 40 | 50 | mV | RLOAD = 10 kΩ to VS/2 | 9 |
| Output Swing from Negative Rail | VOL |  |  | 80 | mV | -40°C to 85°C | 9 |
| Output Swing from Negative Rail | VOL |  |  | 100 | mV | -40°C to 125°C | 9 |
| Output Short-Circuit Current, Source Current | ISC | 20 | 32 |  | mA |  | 9 |
| Output Short-Circuit Current, Sink Current | ISC | 15 | 25 |  | mA |  | 9 |
| Slew Rate | SR | 13 | 20 |  | V/μs | G = 1, 10 V step | 9 |
| Slew Rate | SR | 10 |  |  | V/μs | -40°C to 125°C | 9 |
| Settling Time, 0.1% | tS |  |  | 0.5 | μs | G = -1, 10 V step | 9 |
| Settling Time, 0.01% | tS |  |  | 0.8 | μs |  | 9 |
| Thermal Resistance Junction-to-Ambient (SOT23-5) | θJA |  | 250 |  | °C/W |  | 7 |
| Thermal Resistance Junction-to-Case (SOT23-5) | θJC |  | 81 |  | °C/W |  | 7 |
| Input Bias Current | IB |  | 25 |  | pA |  | 8 |
| Thermal Shutdown Temperature |  |  | 170 |  | °C |  | 10 |
| Recover Temperature |  |  | 150 |  | °C |  | 10 |

## CAD (KiCad official)

- Symbol: `TP1281L1-TR`
- Footprint: `Package_TO_SOT_SMD:SOT-23-5`
- 3D model: SOT-23-5 (KiCad packages3D, STEP)
- 3D model files: `tp1281l1-tr-etched.step` / `tp1281l1-tr-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `tp1281l1-tr.step` / `tp1281l1-tr.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [3PEAK datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8589834375623188480) (24 pp, sha256 `06ff43c28d0dbb4c`, retrieved 2026-10-18, tier: lcsc)
- **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](docs/tp1281l1-tr-datasheet.pdf)