Document
AT30TS74
9- to 12-bit Selectable, ±1.0°C Accurate Digital Temperature Sensor
PRELIMINARY DATASHEET
Features
Single 1.7V to 5.5V Supply Measures Temperature From -55C to +125C Highly Accurate Temperature Measurements Requiring No External
Components ̶ ±1.0C Accuracy (Typical) Over the -20C to +100C Range ̶ ±1.0C Accuracy (Typical) Over the -10C to +100C Range (WLCSP Only) ̶ ±2.0C Accuracy (Typical) Over the -40C to +125C Range
User-configurable Resolution ̶ 9 to 12 bits (0.5C to 0.0625C)
User-configurable High and Low Temperature Limits ALERT Output Pin for Indicating Temperature Alarms 2-Wire I2C and SMBus™ Compatible Serial Interface
̶ Supports SMBus Timeout ̶ Supports SMBus Alert and Alert Response Address (ARA) ̶ Selectable Addressing Allows Up to Eight Devices on the Same Bus I2C High-Speed (HS) Mode Compatible ̶ 3.4MHz Maximum Clock Frequency Built-in noise Suppression Filtering for Clock and Data Input Signals Low-power Dissipation ̶ 85μA Active Current (Typical) During Temperature Measurements Shutdown Mode to Minimize Power Consumption ̶ 1μA Shutdown Current (Typical) One-Shot Mode for Single Temperature Measurement While in Shutdown Mode Pin and Software Compatible to Industry-standard LM75-type Devices Industry Standard Green (Pb/Halide-free/RoHS Compliant) Package Options ̶ 8-lead SOIC (150mil) ̶ 8-lead MSOP (3.0 x 3.0mm) ̶ 8-pad Ultra Thin DFN (UDFN — 2.0 x 3.0 x 0.6mm) ̶ 4-ball WLCSP
Atmel-8897D-DTS-AT30TS74-Datasheet_102014
Description
The Atmel® AT30TS74 is a complete, precise temperature monitoring device designed for use in a variety of applications which require the measuring of local temperatures as an integral part of the system's function and/or reliability. The AT30TS74 device combines a high-precision digital temperature sensor, programmable high and low temperature alarms, and a 2-Wire I2C and SMBus (System Management Bus) compatible serial interface into a single compact package. The temperature sensor can measure temperatures over the full -55C to +125C temperature range and has a maximum accuracy of ±2.0C from -20C to +100C. The result of the digitized temperature measurements are stored in one of the AT30TS74 internal registers, which is readable at any time through the device's serial interface. The AT30TS74 utilizes flexible, user-programmable internal registers to configure the temperature sensor's performance and response to high and low temperature conditions. A dedicated alarm output activates if the temperature measurement exceeds the user-defined temperature and fault count limits. To reduce current consumption and save power, the AT30TS74 features a Shutdown mode which turns off all internal circuitry except for the internal Power-On Reset (POR) and serial interface circuits. The AT30TS74 is factory-calibrated and requires no external components to measure temperature. With its flexibility and high-degree of accuracy, the AT30TS74 is ideal for extended temperature measurements in a wide variety of communication, computer, consumer, environmental, industrial, and instrumentation applications.
2 AT30TS74 [PRELIMINARY DATASHEET]
Atmel-8897D-DTS-AT30TS74-Datasheet_102014
Table of Contents
1. Pin Descriptions and Pinouts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2. Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3. Device Communication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.1 Start Condition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 3.2 Stop Condition. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 3.3 Acknowledge (ACK) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 3.4 No-Acknowledge (NACK) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
4. Device Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
4.1 WLCSP (Wafer Level Chip Scale Package) Device Addressing . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 4.2 High-Speed Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 4.3 Temperature Measurements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 4.4 Temperature Alarm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4.4.1 Fault Tolerance Li.