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.
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View full reportTechnical parameters
| Power | |
|---|---|
| Remote channels (#) | 1 |
| Supply current (max) (µA) | 38 |
| AC and DC characteristics | |
| Local sensor accuracy (max) | 2.5 |
| Environment and package | |
| Operating temperature range (°C) | -40 to 125 |
| Temp resolution (max) (bps) | 12 |
| Other | |
| Addresses | 9 |
| Features | One-shot conversion |
| Interface type | I2C, SMBus |
| Rating | Catalog |
| Type | Remote |