# LTC1540IMS8#TRPBF

**Analog Devices** · Comparators · MSOP-8

LTC1540IMS8#TRPBF from Analog Devices, in a MSOP-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 for the comparator output stage; connect to V- for single-supply operation. |
| 2 | V- | power_in | Negative supply, which should be more negative than GND; connect to ground for single-supply operation. |
| 3 | IN+ | input | Noninverting comparator input with a common-mode range from V- to V+ - 1.3V and a typical input current of 10pA at 25°C. |
| 4 | IN- | input | Inverting comparator input with a common-mode range from V- to V+ - 1.3V and a typical input current of 10pA at 25°C. |
| 5 | HYST | input | Hysteresis input that should be connected to REF if unused, with an input voltage range from VREF to VREF - 50mV. |
| 6 | REF | output | Reference output of 1.182V with respect to V-, able to source up to 1mA and sink 10µA at 25°C and to drive a 0.01µF bypass capacitor without oscillation. |
| 7 | V+ | power_in | Positive supply with an operating voltage from 2V to 11V. |
| 8 | OUT | output | Comparator CMOS output that swings from GND to V+, sourcing up to 40mA and sinking up to 5mA. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Analog Devices |
| Package | MSOP-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 (l) | 3 |
| Supply Current (C-grade limit not used; I-grade) | ICC |  | 0.3 | 0.71 | µA | V+ = 5V; IN-, IN+ = 80mV, HYST = REF, I-Grade; max over full temperature range (l) | 3 |
| Supply Current (I-grade) | ICC |  | 0.28 | 0.64 | µA | V+ = 3V; IN-, IN+ = 80mV, HYST = REF, I-Grade; max over full temperature range (l) | 4 |
| Comparator Input Offset Voltage (LTC1540IMS8) | VOS | -16 | 12 | 16 | mV | V+ = 5V; VCM = 2.5V; max over full temperature range (l) | 3 |
| Comparator Input Offset Voltage (LTC1540IMS8) | VOS | -16 | 12 | 16 | mV | V+ = 3V; VCM = 2.5V; max over full temperature range (l) | 4 |
| Input Leakage Current (IN+, IN-) | IIN | -1 | 0.01 | 1 | nA | V+ = 5V; VIN+ = VIN- = 2.5V; max over full temperature range (l) | 3 |
| Input Leakage Current (HYST) | IIN | -1 | 0.02 | 1 | nA | V+ = 5V; VIN+ = VIN- = 2.5V; max over full temperature range (l) | 3 |
| Input Leakage Current (IN+, IN-) | IIN | -1 | 0.01 | 1 | nA | V+ = 3V; VIN+ = VIN- = 1.5V; max over full temperature range (l) | 4 |
| Input Leakage Current (HYST) | IIN | -1 | 0.02 | 1 | nA | V+ = 3V; VIN+ = VIN- = 1.5V; max over full temperature range (l) | 4 |
| Common Mode Rejection Ratio | CMRR |  | 0.1 | 1 | mV/V | V+ = 5V; V- to V+, 1.3V | 3 |
| Power Supply Rejection Ratio | PSRR |  | 0.1 | 1 | mV/V | V+ = 5V; V+ = 2V to 11V | 3 |
| Common Mode Rejection Ratio | CMRR |  | 0.1 | 1 | mV/V | V+ = 3V; V- to V+, 1.3V | 4 |
| Power Supply Rejection Ratio | PSRR |  | 0.1 | 1 | mV/V | V+ = 3V; V+ = 2V to 11V | 4 |
| Reference Voltage (Industrial, SO-8/MS8/DFN) | VREF | 1.152 | 1.182 | 1.212 | V | V+ = 5V; No Load; Industrial; full operating temperature range (l) | 3 |
| Reference Voltage (Industrial, SO-8/MS8/DFN) | VREF | 1.152 | 1.182 | 1.212 | V | V+ = 3V; No Load; Industrial; full operating temperature range (l) | 4 |
| Load Regulation (source) | ΔVREF |  | 0.5 | 2.5 | mV | V+ = 5V; 0 ≤ ISOURCE ≤ 100µA; full operating temperature range (l) | 3 |
| Load Regulation (source) | ΔVREF |  | 0.75 | 3.5 | mV | V+ = 3V; 0 ≤ ISOURCE ≤ 100µA; full operating temperature range (l) | 4 |
| Load Regulation (sink) | ΔVREF |  | 0.5 | 1.5 | mV | V+ = 5V; 0 ≤ ISINK ≤ 10µA; full operating temperature range (l) | 3 |
| Load Regulation (sink) | ΔVREF |  | 0.5 | 1.5 | mV | V+ = 3V; 0 ≤ ISINK ≤ 10µA; full operating temperature range (l) | 4 |
| Hysteresis Band Variation | VHB | -15 |  | 15 | % | Programmed hysteresis (Figure 5) | 8 |
| Supply Voltage V+ to V-, V+ to GND, GND to V- |  | -0.3 |  | 12 | V |  | 2 |
| Output Current (OUT) |  |  |  | 50 | mA |  | 2 |
| Power Dissipation |  |  |  | 500 | mW |  | 2 |
| Operating Temperature Range (LTC1540I) |  | -40 |  | 85 | °C |  | 2 |
| Storage Temperature Range |  | -65 |  | 150 | °C |  | 2 |
| Maximum Junction Temperature (MS8) | TJMAX |  |  | 150 | °C | MS8 package | 2 |
| Thermal Resistance Junction-to-Ambient (MS8) | θJA |  | 250 |  | °C/W | MS8 package | 2 |
| Propagation Delay | tPD |  | 60 |  | µs | V+ = 5V; COUT = 100pF; Overdrive = 10mV | 3 |
| Propagation Delay | tPD |  | 50 |  | µs | V+ = 5V; COUT = 100pF; Overdrive = 100mV | 3 |
| Propagation Delay | tPD |  | 70 |  | µs | V+ = 3V; COUT = 100pF; Overdrive = 10mV | 4 |
| Propagation Delay | tPD |  | 60 |  | µs | V+ = 3V; COUT = 100pF; Overdrive = 100mV | 4 |

## CAD (KiCad official)

- Symbol: `LTC1540IMS8#TRPBF`
- Footprint: `Package_SO:MSOP-8_3x3mm_P0.65mm`
- 3D model: MSOP-8 (KiCad packages3D, STEP)
- 3D model files: `ltc1540ims8-trpbf-etched.step` / `ltc1540ims8-trpbf-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ltc1540ims8-trpbf.step` / `ltc1540ims8-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/1540fb.pdf) (14 pp, sha256 `50b9965880829dad`, retrieved 2026-10-31, 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/ltc1540ims8-trpbf-datasheet.pdf)