Datasheet

ManualsBrandsMICROCHIP TECHNOLOGY ManualsPMICsPMIC - temperature management Internal 2-wire serial, I²C/SMBus WDFN 8 (2x3)

Features

• 11-bit ADC Temp-to-Digital Converter with 0.125°C Resolution

• Temperature Sensor Compliant with Jedec JC42.4

• Two-wire Serial Interface: I2C/SMBus compatible

 SMBus Timeout supported

• B-grade Accuracy

 ±1°C (max) for +75°C to +95°C

 ±2°C (max) for +40°C to +125°C

 ±3°C (max) for -20°C to +125°C

• Optimized for voltage range: 2.7V to 3.6V

• 100khz and 400khz Compatibility

• Up to Eight Devices on a Single Bus

• Versatile Alarm Output with Programmable Trip Temperatures

• Programmable hysteresis threshold: off, 0°C, 1.5°C, 3°C, 6 °C

• Schmitt Trigger, filtered inputs for Noise Suppression

• Low Operating current

 Temperature Sensor Active ~ 0.2mA (typ.)

• Industry Standard Green (Pb/Halide-free/RoHS Compliant) Package Options

 8-pad Very Very Thin DFN (2 x 3 x 0.8mm)

Description

The Atmel

AT30TS00 combines a temperature sensor, programmable over-

temperature alarms, and a 2-wire I

C/SMBus compatible serial interface into single

compact packages specifically designed for DRAM memory module applications.

However, the AT30TS00 is ideal for many other applications. The AT30TS00

converts its die temperature into digital values using internal analog-to-digital

converters (ADCs). The result of the conversion is held in a temperature register

and is readable at any time through the serial interface. The temperature sensor

converts temperatures from -20°C to +125°C to a digital word and provides an

accuracy of ±1°C (max.) in the temperature range +75°C to +95°C. The temperature

sensor continuously monitors temperature and updates data in the temperature

The AT30TS00 supports the industry standard 2-wire I

C/ SMBus serial Interface to

include a time out feature to help prevent system lock-ups.

The AT30TS00 has flexible user programmable internal registers to configure the

temperature sensor performance and response to over temperature conditions. The

device contains programmable high, low, and critical temperature limits. A dedicated

alarm output,

EVENT

, activates if the conversion result exceeds the value

programmed in the high temperature register. The device

EVENT

pin is configured

as active low and can be configured to operate as an interrupt or as a comparator

output.

The AT30TS00 features a shutdown mode that saves power by turning off

everything but the power-on reset and the 2-wire interface. The AT30TS00

EVENT

and SDA pins are open-drains and require connection of a suitable external pull-up

resistor.

Digital Temperature

Sensor with

Two-Wire Interface

Atmel AT30TS00

Preliminary

8585B−SEEPR−8/10

Summary of content (28 pages)

PAGE 1
Features • 11-bit ADC Temp-to-Digital Converter with 0.125°C Resolution • Temperature Sensor Compliant with Jedec JC42.4 • Two-wire Serial Interface: I2C/SMBus compatible  SMBus Timeout supported • B-grade Accuracy  ±1°C (max) for +75°C to +95°C  ±2°C (max) for +40°C to +125°C  ±3°C (max) for -20°C to +125°C • Optimized for voltage range: 2.7V to 3.
PAGE 2
Figure 0-1. 1. Pin Configuration Pin Name Description A0 – A2 Address Inputs SDA Serial Data SCL Serial Clock Input Temperature Alert EVENT GND Ground VCC Power Supply 8-WDFN VCC EVENT SCL SDA 8 7 6 5 1 2 3 4 A0 A1 A2 GND Bottom View *Absolute Maximum Ratings Operating Temperature ............... − 40°C to +125°C *NOTICE: Storage Temperature ................ − 65°C to + 150°C Voltage on Any Pin with Respect to Ground ..................... − 1.0 V +5.0V Pin A0 ........................
PAGE 3
Two-wire Digital Temperature Sensor Figure 1-1. Block Diagram Temperature Sensor Selected Resolution Temp.
PAGE 4
2. Pin Descriptions SERIAL CLOCK (SCL): The SCL input is used to positive edge clock data into each device and negative edge clock data out of each device. SERIAL DATA (SDA): The SDA pin is bidirectional for serial data transfer. This pin is open drain driven and may be wire-ORed with any number of other open-drain or open collector devices.
PAGE 5
Two-wire Digital Temperature Sensor Table 2-2. Symbol DC Characteristics continued Parameter Test Condition Min Typ Max Units Temperature Sensor Accuracy TACCUR +75°C < Ta < +95°C -1.0 ±0.5 +1.0 °C TACCUR +40°C < Ta < +125°C -2.0 ±1 +2.0 °C TACCUR -20°C < Ta = +125°C -3.0 ±2 +3.0 °C TCONV Temp. Sensor Conversion Time 75 125 ms TRES Temp. Sensor Resolution Note: 0.25 °C 1. Vil min and Vih max are reference only and are not tested 2. Sensor in Shutdown Mode Table 2-3.
PAGE 6
3. Device Operation CLOCK and DATA TRANSITIONS: The SDA pin is normally pulled high with an external device. Data on the SDA pin may change only during SCL low time periods (see Figure 3-3). Data changes during SCL high periods will indicate a start or stop condition as defined below. START CONDITION: A high-to-low transition of SDA with SCL high is a start condition which must precede any other command (see Figure 3-4). STOP CONDITION: A low-to-high transition of SDA with SCL high is a stop condition.
PAGE 7
Two-wire Digital Temperature Sensor Figure 3-2. Bus Timing SCL: Serial Clock SDA: Serial Data I/O tHIGH tLOW SCL tHD:STA tBUF tSU:STO SDA IN tSU:STA tHD:DI SDA input SDA change tSU:DAT STOP condition START condition SCL tHD:DAT SDA OUT Data Valid Figure 3-3.
PAGE 8
Figure 3-4. Start and Stop Condition SDA SCL START Figure 3-5.
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Two-wire Digital Temperature Sensor 4. Device Addressing The Atmel® AT30TS00 device requires an 8-bit device address word following a start condition to enable the chip to access either the Temperature Sensor functions (See Table 4-1). Table 4-1.
PAGE 10
5.3. Temperature Sensor Power-on Default The Atmel® AT30TS00 has an internal Power-on Reset (POR) circuit.
PAGE 11
Two-wire Digital Temperature Sensor 6. Register Descriptions This section describes all the temperature sensor registers that are used in the Atmel® AT30TS00. The AT30TS00 has several registers that are user accessible and or programmable and used for latching temperature readings, storing high and low temperature limits, configuring the hysteresis threshold and reporting status.
PAGE 12
6.2. Capability Register (16-bit Read only, Address = 00h) The Atmel® AT30TS00 is capable of measuring temperature with ±1°C over the active range and ±2°C over the monitor range. This register is a 16-bit read-only register used to specify the capabilities of the temperature sensor. The capability register functions are described in Table 6-3 and Table 6-4. Table 6-3.
PAGE 13
Two-wire Digital Temperature Sensor 6.3. Configuration Register (16-bit Read/Write, Address = 01h) The Atmel® AT30TS00 contains a 16-bit configuration register allowing the user to set key operational features of the temperature sensor. The configuration register functions are described in Table 6-5 and Table 6-6. Table 6-5.
PAGE 14
Bit Symbol Description 7 CRTALML Crit_Alarm Trip Lock bit Locks the Critical Alarm Trip register from being updated 0 = Crit_Alarm Trip register can be updated (Power-on default) 1 = Crit_Alarm Trip register is locked and cannot be updated Once set, it can be only be cleared to ‘0’ by internal power on reset (POR) which occurs when the device is powered off and then powered on 6 WINLOCK Alarm Window Lock bit 0 = Upper and Lower Alarm Trip Registers can be updated (Power-on default) 1 = Upper and Low
PAGE 15
Two-wire Digital Temperature Sensor Figure 6-1.
PAGE 16
6.4. Upper Alarm Trip Register (16-bit Read/Write, Address = 02h) The Upper Alarm Trip Register holds the user programmed upper temperature boundary trip point in 11-bit two’s complement format (0.25°C resolution) that can be used to monitor ambient temperature in an operating window (See Table 6-7 and Table 6-8). When the temperature increases above this trip point, or drops below or is equal to the trip point (minus any hysteresis set), then the EVENT pin is asserted (if enabled).
PAGE 17
Two-wire Digital Temperature Sensor 6.5. Lower Alarm Trip Register (16-bit Read/Write, Address = 03h) The Lower Alarm Trip Register holds the user programmed lower temperature boundary trip point in 11-bit two’s complement format (0.25°C resolution) that can be used to monitor ambient temperature in an operating window (See Table 6-9 and Table 6-10).
PAGE 18
6.6. Critical Alarm Trip Register (16-bit Read/Write, Address = 04h) The Critical Alarm Trip Register holds the user programmed Critical Alarm temperature boundary trip point in 11-bit two’s complement format (0.25°C resolution) that can be used to monitor ambient temperature (See Table 6-11 and Table 6-12). When the temperature increases above this trip point, the EVENT pin will be asserted (if enabled).
PAGE 19
Two-wire Digital Temperature Sensor 6.7. Temperature Register (16-bit Read only, Address = 05h) The temperature register holds the internal temperature measurement data represented in 11-bit 2’s complement word format allowing for resolution equal to 0.125°C (least significant bit).
PAGE 20
6.7.2. Temperature Register Format This section will clarify the temperature register format and temperature bit value assignments used for temperature for the following registers: Upper Alarm Trip, Lower Alarm Trip, Critical Alarm Trip and Temperature Data. The temperatures expressed in the Upper Alarm Trip, Lower Alarm Trip, Critical Alarm Trip and temperature registers are indicated in two’s complement format.
PAGE 21
Two-wire Digital Temperature Sensor 6.8. Manufacturer ID Register (16-bit Read only, Address = 06h) This register is used to identity the manufacturer of the product. The manufacturer ID for the Atmel AT30TS00 is 001Fh (See Table 6-17). Table 6-17. Manufacturer ID Register Bit Distribution Bit 15 14 13 Symbol 11 10 9 8 Manufacturer ID Default Value 0 0 0 0 0 0 0 0 R / W access R R R R R R R R Bit 7 6 5 4 3 2 1 0 Symbol 6.9.
PAGE 22
6.10. SMBus Register (16-bit Write / Read only, Address = 22h) The SMBus Register allows the user to enable or disable the SMBus time out feature (See Table 19 and Table 20). Table 6-19. SMBus Register Bit Distribution Bit 15 14 13 12 Symbol 11 10 9 8 RFU Default Value 0 0 0 0 0 0 0 0 R / W access R R R R R R R R Bit 7 6 5 4 3 2 1 0 Symbol SMBOUT RFU Default Value 0 0 0 0 0 0 0 0 R / W access R/W R R R R R R R Table 6-20.
PAGE 23
Two-wire Digital Temperature Sensor 7.2. TS Read Operations Reading data from the TS may be accomplished in one of two ways: (a) If the location latched in the pointer register is correct (for normal operation it is expected the same address will be read repeatedly for temperature), the read sequence may consist of a device address from the bus master followed by two bytes of data from the device; or (b) The pointer register is loaded with the correct register address, and the data is read.
PAGE 24
8. Atmel AT30TS00 Ordering Information Table 8-1. Green Package Options (Pb/Halide-free/RoHS Compliant) Ordering Code AT30TS00-MAH-T Note: Package Lead Finish Operating Voltage Max. Freq. (KHz) Operational range 8M2 NiPdAu 2.7V to 3.6V 400 –20°C to 125°C 1. The shipping carrier option code is not marked on the devices Package Type 8M2 24 8-pad, 2 x 3 x 0.
PAGE 25
Two-wire Digital Temperature Sensor WDFN Marking TOP MARK |---|---|---| T 0 |---|---|---| H 2 |---|---|---| Y X X |---|---|---| * | Pin 1 Indicator (Dot) Y = YEAR OF ASSEMBLY XX = ATMEL LOT NUMBER TO COORESPOND WITH TRACE CODE LOG BOOK. (e.g. XX = AA, AB, AC,...
PAGE 26
9. Package Drawing 8M2 – WDFN COMMON DIMENSIONS (Unit of Measure – mm) SYMBOL MIN 2.00 BSC E 3.00 BSC D2 1.35 1.40 1.45 E2 1.25 1.30 1.35 A 0.70 0.75 0.80 A1 0.0 0.02 0.05 L b NOTE 0.20 REF 0.35 0.40 0.45 0.50 BSC e 0.18 0.25 0.30 2 1. This drawing is for general information only. Refer to JEDEC Drawing MO-229, WCED-3, for proper dimensions, tolerances, datums, etc. 2. Dimensions b applies to metallized terminal and is measured between 0.15 mm and 0.
PAGE 27
Two-wire Digital Temperature Sensor 10. Revision History Doc. Rev. Date 8585B 08/2010 Comments Memory Module to Two-wire Add ICC, Timeout active, VCC = 3.6V in DC Parameters Remove tAA, Clock Low to Data Out Valid in AC Parameters Add THD.
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He ad q ua rt e rs In t er n at io n al Atmel Corporation 2325 Orchard Parkway San Jose, CA 95131 USA Tel: (+1) (408) 441-0311 Fax: (+1) (408) 487-2600 www.atmel.com Atmel Asia Limited Unit 01-5 & 16, 19F BEA Tower, Millennium City 5 418 Kwun Tong Road Kwun Tong, Kowloon HONG KONG Tel: (+852) 2245-6100 Fax: (+852) 2722-1369 Atmel Munich GmbH Business Campus Parkring 4 D-85748 Garching b. Munich GERMANY Tel: (+49) 89-31970-0 Fax: (+49) 89-3194621 Atmel Japan 9F, Tonetsu Shinkawa Bldg.