# LT1222CS8#PBF

**Analog Devices** · Operational Amplifier · SO-8

LT1222CS8#PBF from Analog Devices, in a SO-8. 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 | NULL | passive | Offset null terminal for the suggested external offset-nulling circuit shown in the Applications Information, which must be removed when the LT1222 replaces other op amps. |
| 2 | -IN | input | Inverting input; differential input voltage is limited to ±6V and input voltage must stay within ±VS. |
| 3 | +IN | input | Non-inverting input; differential input voltage is limited to ±6V and input voltage must stay within ±VS. |
| 4 | V- | power_in | Negative supply rail; total supply voltage (V+ to V-) must not exceed 36V. |
| 5 | COMP | passive | Internal compensation node about one diode drop above the output that can source or sink 1.2mA; a capacitor to ground adjusts frequency response, and it can also be used to clamp the output swing. |
| 6 | VOUT | output | Amplifier output, which swings to at least ±12V into 500Ω and can be shorted indefinitely (a heat sink may be required when shorted). |
| 7 | V+ | power_in | Positive supply rail; total supply voltage (V+ to V-) must not exceed 36V. |
| 8 | NULL | passive | Offset null terminal for the suggested external offset-nulling circuit shown in the Applications Information, which must be removed when the LT1222 replaces other op amps. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Analog Devices |
| Package | SO-8 |
| Category | Operational Amplifier/Comparator |
| Pins | 8 |

## Electrical characteristics

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

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Input Offset Voltage | VOS |  | 100 | 300 | μV | TA = 25°C, VS = ±15V, VCM = 0V | 2 |
| Input Offset Current | IOS |  | 100 | 300 | nA | TA = 25°C, VS = ±15V, VCM = 0V | 2 |
| Input Bias Current | IB |  | 100 | 300 | nA | TA = 25°C, VS = ±15V, VCM = 0V | 2 |
| Input Resistance | RIN | 20 | 45 |  | MΩ | TA = 25°C, VS = ±15V, VCM = ±12V | 2 |
| Input Voltage Range (Positive) |  | 12 | 14 |  | V | TA = 25°C, VS = ±15V, VCM = 0V | 2 |
| Input Voltage Range (Negative) |  | -13 | -12 |  | V | TA = 25°C, VS = ±15V, VCM = 0V | 2 |
| Common Mode Rejection Ratio | CMRR | 100 | 120 |  | dB | TA = 25°C, VS = ±15V, VCM = ±12V | 2 |
| Power Supply Rejection Ratio | PSRR | 98 | 110 |  | dB | TA = 25°C, VS = ±5V to ±15V | 2 |
| Large-Signal Voltage Gain | AVOL | 100 | 200 |  | V/mV | TA = 25°C, VOUT = ±10V, RL = 500Ω | 2 |
| Output Swing | VOUT | 12 | 13 |  | ±V | TA = 25°C, RL = 500Ω | 2 |
| Output Current | IOUT | 24 | 26 |  | mA | TA = 25°C, VOUT = ±12V | 2 |
| Slew Rate | SR | 150 | 200 |  | V/μs | TA = 25°C, Note 5 | 2 |
| Supply Current | IS |  | 8 | 10.5 | mA | TA = 25°C, VS = ±15V | 3 |
| Input Offset Voltage (0°C to 70°C) | VOS |  | 100 | 600 | μV | ● 0°C ≤ TA ≤ 70°C, VS = ±15V, VCM = 0V | 3 |
| Input Offset Current (0°C to 70°C) | IOS |  | 100 | 400 | nA | ● 0°C ≤ TA ≤ 70°C, VS = ±15V, VCM = 0V | 3 |
| Input Bias Current (0°C to 70°C) | IB |  | 100 | 400 | nA | ● 0°C ≤ TA ≤ 70°C, VS = ±15V, VCM = 0V | 3 |
| Common Mode Rejection Ratio (0°C to 70°C) | CMRR | 100 | 120 |  | dB | ● 0°C ≤ TA ≤ 70°C, VCM = ±12V | 3 |
| Power Supply Rejection Ratio (0°C to 70°C) | PSRR | 98 | 110 |  | dB | ● 0°C ≤ TA ≤ 70°C, VS = ±5V to ±15V | 3 |
| Large-Signal Voltage Gain (0°C to 70°C) | AVOL | 100 | 200 |  | V/mV | ● 0°C ≤ TA ≤ 70°C, VOUT = ±10V, RL = 500Ω | 3 |
| Output Swing (0°C to 70°C) | VOUT | 12 | 13 |  | ±V | ● 0°C ≤ TA ≤ 70°C, RL = 500Ω | 3 |
| Output Current (0°C to 70°C) | IOUT | 24 | 26 |  | mA | ● 0°C ≤ TA ≤ 70°C, VOUT = ±12V | 3 |
| Slew Rate (0°C to 70°C) | SR | 150 | 200 |  | V/μs | ● 0°C ≤ TA ≤ 70°C, Note 5 | 3 |
| Supply Current (0°C to 70°C) | IS |  | 8 | 11 | mA | ● 0°C ≤ TA ≤ 70°C, VS = ±15V | 3 |
| Total Supply Voltage (V+ to V-) |  |  |  | 36 | V |  | 2 |
| Differential Input Voltage |  | -6 |  | 6 | V |  | 2 |
| Specified Temperature Range, LT1222C |  | 0 |  | 70 | °C | Note 3 | 2 |
| Operating Temperature Range, LT1222C |  | -40 |  | 85 | °C |  | 2 |
| Maximum Junction Temperature, Plastic Package | TJMAX |  |  | 150 | °C | Plastic package | 2 |
| Storage Temperature Range |  | -65 |  | 150 | °C |  | 2 |
| Lead Temperature (Soldering) |  |  |  | 300 | °C | 10 sec | 2 |
| Thermal Resistance, Junction to Ambient | θJA |  | 190 |  | °C/W | S8 package | 2 |

## Materials and finish

As the datasheet states them (page.json `metadata.appearance`; the 3D model's colours follow it).

| Part | Material | Colour / plating | Datasheet says | Page |
|---|---|---|---|---|
| contacts |  | tin | NOTE: LEAD DIMENSIONS APPLY TO SOLDER DIP/PLATE (1.143, 1.651) OR TIN PLATE LEADS | 9 |

## CAD (KiCad official)

- Symbol: `LT1222CS8#PBF`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SO-8 (KiCad packages3D, STEP)
- 3D model files: `lt1222cs8-pbf-etched.step` / `lt1222cs8-pbf-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lt1222cs8-pbf.step` / `lt1222cs8-pbf.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Analog Devices datasheet](https://www.analog.com/media/en/technical-documentation/data-sheets/1222fc.pdf) (12 pp, sha256 `007f87cb6d8c057c`, retrieved 2026-10-30, tier: manufacturer)
- **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/lt1222cs8-pbf-datasheet.pdf)