NCT475: Digital Temperature Sensor with 2-Wire Interface
The NCT475 is a two-wire serially programmable temperature sensor with an over-temperature/interrupt output pin to signal out of limit conditions. This is an open-drain pin and can operate in either comparator or interrupt mode. Temperature measurements are converted into digital form using a high resolution (12 bit), sigma-delta, analog-to-digital converter (ADC). The device operates over the –55°C to +125°C temperature range.
Communication with the NCT475 is accomplished via the SMBus/I2C interface which is compatible with industry standard protocols. Through this interface the NCT475s internal registers may be accessed. These registers allow the user to read the current temperature, change the configuration settings and adjust the temperature limits.
The NCT475 has a wide supply voltage range of 3.0 V to 5.5 V. The average supply current is 575 μA at 3.3 V. It also offers a shutdown mode to conserve power. The typical shutdown current is 3 μA.
The NCT475 is available in a space saving 6 ball CSP package as NCT475A and NCT475B. NCT475B gives I2C address options of 0x48 and 0x4A while NCT475A gives address options of 0x49 and 0x4B. NCT475 is also fully register compatible with the NCT375, LM75 and TMP75
Features- Input voltage range from 3.0 V to 5.5 V
- Temperature range from −55°C to +125°C
- SMBus/I2C interface
- Shutdown mode for low power consumption
- One-Shot Mode
- Available in 6 ball CSP package with multiple address options
- 12-bit temperature-to-digital converter
|
Applications- Computer thermal monitoring
- Thermal protection
- Isolated sensors
- Battery Management
- Office electronics
- Electronic test equipment
- Thermostat controls
|
Data Sheets (1)
Package Drawings (1)
Order Information
| Product | Status | Compliance | Package | MSL* | Container | Budgetary Price/Unit |
|---|
| NCT475AFCT2G | Active | Pb-free
Halide free | WLCSP-6 | 567JR | 1 | Tape and Reel | 3000 | $0.33 |
| NCT475BFCT2G | Active | Pb-free
Halide free | WLCSP-6 | 567JR | 1 | Tape and Reel | 3000 | $0.33 |
Specifications
| Product | Sensor Type | Data Transmission Standard | ICC Max (mA) | VCC Min (V) | VCC Max (V) | T Min (°C) | T Max (°C) | Temperature Error (°C) |
|---|
| NCT475AFCT2G | Local | SMBus | 0.575 | 3 | 5.5 | -55 | 125 | ±1 |
| NCT475BFCT2G | Local | SMBus | 0.575 | 3 | 5.5 | -55 | 125 | ±1 |
