AT30TS750A-MA8M-T Microchip

AT30TS750A 9- to 12-bit Selectable, 0.5C Accurate Digital Temperature Sensor with Nonvolatile Registers DATASHEET Features Single 1.7V to 5.5V supply Measures temperature from -55C to +125 C Highly accurate temperature measurements requiring no external components 0.5C accuracy (typical) over the 0 C to +85C range 1.0C accuracy (typical) over the -25 C to +105C range 2.0C accuracy (typical) over the -40 C to +125C range User-configurable resolution 9 to 12 bits (0.5 C to 0.0625C) User-configurable high and low temperature limits Nonvolatile registers to retain user-configured or pre-defined power-up defaults Register locking to prevent erroneous misconfiguration Register lockdown for permanent, non-changeable device configuration ALERT output pin for indicating temperature alarms 2 2-wire I C 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 Built-in noise suppression filtering for clock and data input signals Low power dissipation 75 A active current (typical) during temperature measurements Shutdown mode to minimize power consumption 1 A 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 (150-mil) 8-lead MSOP (3.0 x 3.0mm) 8-pad Ultra Thin DFN (UDFN 2.0 x 3.0 x 0.6mm) Atmel-8855F-DTS-AT30TS750A-Datasheet 102014Table of Contents 1. Description . 4 2. Pin Descriptions and Pinouts 5 3. Block Diagram 6 4. Device Communication 7 4.1 Start Condition . 7 4.2 Stop Condition 7 4.3 Acknowledge (ACK) . 7 4.4 No-Acknowledge (NACK) . 8 5. Device Operation . 9 5.1 Temperature Measurements . 9 5.2 Temperature Alarm . 10 5.2.1 Fault Tolerance Limits . 10 5.2.2 Comparator Mode 11 5.2.3 Interrupt Mode . 12 5.3 Shutdown Mode . 13 5.3.1 One-Shot Mode 13 6. Registers 14 6.1 Pointer Register . 14 6.2 Temperature Register . 16 6.3 Configuration Register 18 6.3.1 OS Bit . 19 6.3.2 R1:R0 Bits 19 6.3.3 FT1:FT0 Bits 20 6.3.4 POL Bit 20 6.3.5 CMP/INT Bit . 20 6.3.6 SD Bit 20 6.3.7 NVRBSY . 21 6.4 Nonvolatile Configuration Register . 22 6.4.1 NVR1: NVR0 Bits . 23 6.4.2 NVFT1:NVFT0 Bits . 24 6.4.3 NVPOL Bit 24 6.4.4 NVCMP/INT Bit 24 6.4.5 NVSD Bit . 24 6.4.6 RLCKDWN 24 6.4.7 RLCK 25 6.5 T and T Limit Registers 26 LOW HIGH 6.6 Nonvolatile T and T Limit Registers 28 LOW HIGH 7. Register Locking . 30 8. Operations Allowed During Nonvolatile Busy Status . 31 9. Other Commands 32 9.1 Copy Nonvolatile Registers to Volatile Registers 32 9.2 Copy Volatile Registers to Nonvolatile Registers 33 2 AT30TS750A DATASHEET Atmel-8855F-DTS-AT30TS750A-Datasheet 102014