| Local sensor accuracy (Max) (+/- C) | 2.5 |
| Type | Remote |
| Operating temperature range (C) | -40 to 125 |
| Supply voltage (Min) (V) | 2.7 |
| Interface type | I2C, SMBus |
| Supply voltage (Max) (V) | 5.5 |
| Supply current (Max) (uA) | 38 |
| Temp resolution (Max) (bits) | 12 |
| Features | One-shot conversion |
| Remote channels (#) | 2 |
| Addresses | 4 |
| Rating | Catalog |
- SOT23-8 and DSBGA (WCSP) PACKAGES
- ±1°C REMOTE DIODE SENSOR (MAX)
- ±1.5°C LOCAL TEMPERATURE SENSOR (MAX)
- SERIES RESISTANCE CANCELLATION
- n-FACTOR CORRECTION
- TWO-WIRE/SMBus? SERIAL INTERFACE
- MULTIPLE INTERFACE ADDRESSES
- DIODE FAULT DETECTION
- RoHS COMPLIANT AND NO Sb/Br
The TMP421, TMP422, and TMP423 are remote temperature sensor monitors with a built-in local temperature sensor. The remote temperature sensor diode-connected transistors are typically low-cost, NPN- or PNP-type transistors or diodes that are an integral part of microcontrollers, microprocessors, or FPGAs.
Remote accuracy is ±1°C for multiple IC manufacturers, with no calibration needed. The two-wire serial interface accepts SMBus write byte, read byte, send byte, and receive byte commands to configure the device.
The TMP421, TMP422, and TMP423 include series resistance cancellation, programmable non-ideality factor, wide remote temperature measurement range (up to +150°C), and diode fault detection.
The TMP421, TMP422, and TMP423 are all available in a SOT23-8 package. The TMP421C is also available in a DSBGA (WCSP) package.
