The TMP461 device is a high-accuracy, low-power remote temperature sensor monitor with a built-in local temperature sensor. The remote temperature sensors are typically low-cost discrete NPN or PNP transistors, or substrate thermal transistors or diodes that are integral parts of microprocessors, microcontrollers, or field-programmable gate arrays (FPGAs). Temperature is represented as a 12-bit digital code for both local and remote sensors, giving a resolution of 0.0625°C. The two-wire serial interface accepts the SMBus communication protocol with up to nine different pin-programmable addresses.
Advanced features [such as series resistance cancellation, programmable nonideality factor (η-factor), programmable offset, programmable temperature limits, and a programmable digital filter] are combined to provide a robust thermal monitoring solution with improved accuracy and noise immunity.
The TMP461 is ideal for multi-location, high-accuracy temperature measurements in a variety of communication, computing, instrumentation, and industrial applications. The device is specified for operation over a supply voltage range of 1.7 V to 3.6 V, and a temperature range of –40°C to 125°C.
PART NUMBER | PACKAGE | BODY SIZE (NOM) |
---|---|---|
TMP461 | WQFN (10) | 2.00 mm × 2.00 mm |
Changes from A Revision (July 2015) to B Revision
Changes from * Revision (June 2015) to A Revision
PIN | TYPE | DESCRIPTION | |
---|---|---|---|
NAME | NO. | ||
A0 | 5 | Digital input | Address select. Connect to GND, V+, or leave floating. |
A1 | 10 | Digital input | Address select. Connect to GND, V+, or leave floating. |
ALERT/THERM2 | 7 | Digital output | Interrupt or SMBus alert output. Can be configured as a second THERM output. Open-drain; requires a pullup resistor to a voltage between 1.7 V and 3.6 V. |
D– | 3 | Analog input | Negative connection to remote temperature sensor |
D+ | 2 | Analog input | Positive connection to remote temperature sensor |
GND | 6 | Ground | Supply ground connection |
SCL | 9 | Digital input | Serial clock line for SMBus. Input; requires a pullup resistor to a voltage between 1.7 V and 3.6 V if driven by an open-drain output. |
SDA | 8 | Bidirectional digital input-output | Serial data line for SMBus. Open-drain; requires a pullup resistor to a voltage between 1.7 V and 3.6 V. |
THERM | 4 | Digital output | Thermal shutdown or fan-control pin. Open-drain; requires a pullup resistor to a voltage between 1.7 V and 3.6 V. |
V+ | 1 | Power supply | Positive supply voltage, 1.7 V to 3.6 V |