# LTC1440IS8#TRPBF

**Analog Devices** · Comparators · SO-8

LTC1440IS8#TRPBF 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 | GND | power_in | Ground; connect to V- for single-supply operation. |
| 2 | V- | power_in | Negative supply; connect to ground for single-supply operation, and it must be more negative than GND. |
| 3 | IN+ | input | Noninverting comparator input with common-mode range from V- to V+ -1.3V and typical input current of 10pA at 25°C. |
| 4 | IN- | input | Inverting comparator input with common-mode range from V- to V+ -1.3V and typical input current of 10pA at 25°C. |
| 5 | HYST | input | Hysteresis input that should be connected to REF if not used, with input voltage range from VREF to VREF - 50mV. |
| 6 | REF | output | Reference output at 1.182V with respect to V-, able to source up to 200µA and sink 15µA at 25°C, and it drives a 0.01µF bypass capacitor without oscillation. |
| 7 | V+ | power_in | Positive supply, 2V to 11V. |
| 8 | OUT | output | Comparator CMOS output that swings from GND to V+ and can source up to 40mA and sink 5mA. |

## 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 |
|---|---|---|---|---|---|---|---|
| V+ Supply Voltage Range | V+ | 2 |  | 11 | V | Full operating temperature range | 3 |
| Supply Current (LTC1440, HYST = REF) | ICC |  |  | 4.4 | µA | V+ = 5V; IN+ = IN- + 80mV; HYST = REF; -40°C ≤ TA ≤ 85°C | 3 |
| Supply Current (LTC1440, HYST = REF) | ICC |  |  | 4.3 | µA | V+ = 3V; IN+ = IN- + 80mV; HYST = REF; -40°C ≤ TA ≤ 85°C | 4 |
| Comparator Input Offset Voltage | VOS | -10 | 3 | 10 | mV | V+ = 5V; VCM = 2.5V; full operating temperature range | 3 |
| Comparator Input Offset Voltage | VOS | -10 | 3 | 10 | mV | V+ = 3V; VCM = 1.5V; full operating temperature range | 4 |
| Input Leakage Current (IN+, IN-) | IIN | -1 | 0.01 | 1 | nA | V+ = 5V; VIN+ = VIN- = 2.5V; full operating temperature range | 3 |
| Input Leakage Current (IN+, IN-) | IIN | -1 | 0.01 | 1 | nA | V+ = 3V; VIN+ = VIN- = 1.5V; full operating temperature range | 4 |
| Input Leakage Current (HYST) | IIN | -1 | 0.02 | 1 | nA | V+ = 5V; full operating temperature range | 3 |
| Input Leakage Current (HYST) | IIN | -1 | 0.02 | 1 | nA | V+ = 3V; full operating temperature range | 4 |
| Common Mode Rejection Ratio | CMRR |  | 0.1 | 1 | mV/V | V+ = 5V; V- to V+, 1.3V | 3 |
| Common Mode Rejection Ratio | CMRR |  | 0.1 | 1 | mV/V | V+ = 3V; V- to V+, 1.3V | 4 |
| Power Supply Rejection Ratio (LTC1440) | PSRR |  | 0.1 | 1 | mV/V | V+ = 5V; V+ = 2.5V to 11V | 3 |
| Power Supply Rejection Ratio (LTC1440) | PSRR |  | 0.1 | 1 | mV/V | V+ = 3V; V+ = 2.5V to 11V | 4 |
| Reference Voltage (LTC1440, -40°C to 85°C) | VREF | 1.164 |  | 1.2 | V | V+ = 5V; no load; -40°C ≤ TA ≤ 85°C | 3 |
| Reference Voltage (LTC1440, -40°C to 85°C) | VREF | 1.164 |  | 1.2 | V | V+ = 3V; no load; -40°C ≤ TA ≤ 85°C | 4 |
| Reference Source Current Change (LTC1440) | ∆VREF |  | 0.8 | 5 | mV | V+ = 5V; 0 ≤ ISOURCE ≤ 2mA; full operating temperature range | 3 |
| Reference Source Current Change (LTC1440) | ∆VREF |  | 0.8 | 5.5 | mV | V+ = 3V; 0 ≤ ISOURCE ≤ 1mA; full operating temperature range | 4 |
| Reference Sink Current Change (LTC1440) |  |  | 0.5 | 1.5 | mV | V+ = 5V; 0 ≤ ISINK ≤ 10µA | 3 |
| Reference Sink Current Change (LTC1440) |  |  | 0.5 | 1.5 | mV | V+ = 3V; 0 ≤ ISINK ≤ 10µA | 4 |
| Input Current (IN+, IN-, HYST) |  |  |  | 20 | mA |  | 2 |
| Reference Output Current (REF) |  |  |  | 20 | mA |  | 2 |
| Output Current (OUT) |  |  |  | 50 | mA |  | 2 |
| Power Dissipation |  |  |  | 500 | mW |  | 2 |
| Operating Temperature Range (LTC144XI) | TA | -40 |  | 85 | °C | Industrial grade (LTC144XI) | 2 |
| Storage Temperature Range |  | -65 |  | 150 | °C |  | 2 |
| Junction Temperature |  |  |  | 150 | °C |  | 2 |
| Lead Temperature (Soldering) |  |  |  | 300 | °C | Soldering, 10 sec | 2 |
| Thermal Resistance Junction-to-Ambient (S8) | θJA |  | 175 |  | °C/W | S8 package (8-lead plastic SO); TJMAX = 150°C | 2 |

## CAD (KiCad official)

- Symbol: `LTC1440IS8#TRPBF`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SO-8 (KiCad packages3D, STEP)
- 3D model files: `ltc1440is8-trpbf-etched.step` / `ltc1440is8-trpbf-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ltc1440is8-trpbf.step` / `ltc1440is8-trpbf.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/144012fd.pdf) (16 pp, sha256 `ed5aea2a7c88ef25`, 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/ltc1440is8-trpbf-datasheet.pdf)