# ZXCT199QB1DW-7

**Diodes Incorporated** · Current Sense Amplifiers · SOT-363

ZXCT199QB1DW-7 from Diodes Incorporated, in a SOT-363. 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 | REF | input | Reference voltage analog input that sets the output level for zero differential input, settable from 0V to V+. |
| 2 | GND | power_in | Ground. |
| 3 | V+ | power_in | Power supply input, 2.7V to 26V. |
| 4 | IN+ | input | Analog input connected to the supply side of the shunt resistor, common-mode range -0.1V to 26V. |
| 5 | IN- | input | Analog input connected to the load side of the shunt resistor, common-mode range -0.1V to 26V. |
| 6 | OUT | output | Analog output voltage proportional to the load current, swinging GND - 0.3V to (V+) + 0.3V absolute maximum. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Diodes Incorporated |
| Package | SOT-363 |
| Category | Amplifiers/Comparators |
| Pins | 6 |

## 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 (V+) | V+ |  |  | 26 | V | TA=+25°C | 3 |
| Differential input (IN+)-(IN-) |  | -26 |  | 26 | V | Analog inputs IN+, IN- | 3 |
| Common mode input voltage (abs max) |  | -0.3 |  | 26 | V | Analog inputs, GND referenced | 3 |
| REF input voltage |  | -0.3 |  |  | V | GND - 0.3 to (V+) + 0.3 | 3 |
| Output voltage |  | -0.3 |  |  | V | GND - 0.3 to (V+) + 0.3 | 3 |
| Input current into all pins |  |  |  | 5 | mA | Note 5 | 3 |
| ESD HBM |  |  |  | 5 | kV | Human body model | 3 |
| ESD CDM |  |  |  | 1.5 | kV | Charged-device model | 3 |
| Operating temperature (abs max) |  | -40 |  | 125 | °C |  | 3 |
| Storage temperature |  | -65 |  | 150 | °C |  | 3 |
| Junction-to-ambient thermal resistance | RθJA |  | 228 |  | °C/W | TA=+25°C, MRP FR-4 board | 3 |
| Junction-to-case thermal resistance | RθJC |  | 72 |  | °C/W | TA=+25°C, MRP FR-4 board | 3 |
| Common-mode input voltage (recommended) | VCM | -0.1 | 12 | 26 | V |  | 3 |
| Operating supply voltage (recommended) | VS | 2.7 | 5 | 26 | V | Applied to V+ | 3 |
| Operating ambient temperature | TA | -40 |  | 125 | °C |  | 3 |
| Common-mode input | VCM | -0.1 |  | 26 | V | TA=-40°C to +125°C | 4 |
| Common-mode rejection | CMRR | 90 | 120 |  | dB | ZXCT199QX1, VIN+=0V to 26V, VSENSE=0mV, TA=-40°C to +125°C | 4 |
| Offset voltage, RTI | VOS | -100 | 5 | 100 | µV | ZXCT199QB Version, VSENSE=0mV | 4 |
| VOS vs. temperature | dVOS/dT |  | 0.1 | 0.5 | µV/°C | TA=-40°C to +125°C | 4 |
| Long-term stability |  |  |  | 270 | µV | Only for ZXCT199QX1, 1000 hours at TA=+125°C | 4 |
| Power supply rejection | PSRR |  | 0.1 |  | µV/V | VS=2.7V to 18V, VIN+=18V, VSENSE=0mV | 4 |
| Input bias current | IB |  | 28 |  | µA | VSENSE=0mV | 4 |
| Input offset current | IOS |  | 0.02 |  | µA | VSENSE=0mV | 4 |
| Gain | G |  | 50 |  | V/V | ZXCT199QX1 | 4 |
| Gain error | EG | -1 | 0.03 | 1 | % | A and B Version, VSENSE=-5mV to 5mV, TA=-40°C to 125°C | 4 |
| Gain error vs. temperature |  |  | 3 | 10 | ppm/°C | TA=-40°C to +125°C | 4 |
| Nonlinearity error |  |  | 0.01 |  | % | VSENSE=-5mV to 5mV | 4 |
| Swing to V+ power-supply rail | VOH |  | 0.05 | 0.2 | V | RL=10kΩ to GND, TA=-40°C to +125°C; (V+) minus value | 4 |
| Swing to GND | VOL |  | 0.005 | 0.05 | V | RL=10kΩ to GND, TA=-40°C to +125°C; (VGND) plus value | 4 |
| Maximum capacitive load |  |  | 1 |  | nF | No sustained oscillation | 4 |
| Bandwidth | GBW |  | 70 |  | kHz | CLOAD=10pF, ZXCT199QX1 | 4 |
| Slew rate | SR |  | 0.5 |  | V/µs |  | 4 |
| Voltage noise density |  |  | 25 |  | nV/√Hz |  | 4 |
| Operating voltage range | VS | 2.7 |  | 26 | V | TA=-40°C to +125°C | 4 |
| Operating voltage range | VS | 2.5 |  | 26 | V | -20°C to +85°C | 4 |
| Quiescent current | IQ |  | 65 | 100 | µA | VSENSE=0mV | 4 |
| Quiescent current over temperature | IQ |  |  | 115 | µA | TA=-40°C to +125°C | 4 |
| Specified temperature range |  | -40 |  | 125 | °C |  | 4 |
| Operating temperature range |  | -40 |  | 125 | °C |  | 4 |

## 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 |  Terminals: Finish, Matte Tin Plated Leads, Solderable per MIL-STD-202, Method 208  Weight: 0.006 grams (Approximate) | 16 |

## CAD (KiCad official)

- Symbol: `ZXCT199QB1DW-7`
- Footprint: `Package_TO_SOT_SMD:SOT-363_SC-70-6`
- 3D model: SOT-363 (KiCad packages3D, STEP)
- 3D model files: `zxct199qb1dw-7-etched.step` / `zxct199qb1dw-7-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `zxct199qb1dw-7.step` / `zxct199qb1dw-7.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Diodes Incorporated datasheet](https://www.diodes.com/assets/Datasheets/ZXCT199QB1DW-7.pdf) (17 pp, sha256 `85f97dc748ab99cf`, retrieved 2026-10-27, tier: manufacturer)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-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/zxct199qb1dw-7-datasheet.pdf)