0
ACTIVE
Local sensor accuracy (max) |
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 |
Features |
One-shot conversion |
Supply current (max) (µA) |
38 |
Temp resolution (max) (bps) |
12 |
Remote channels (#) |
2 |
Addresses |
4 |
Rating |
Catalog |
SOT-23 (DCN)-8-4.64 mm² 2.9 x 1.6
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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