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PDF AT30TSE002B Data sheet ( Hoja de datos )
| Número de pieza | AT30TSE002B | |
| Descripción | Integrated Temperature Sensor | |
| Fabricantes | ATMEL Corporation | |
| Logotipo |  |
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Features
• Integrated Temperature Sensor (TS) + 2Kbit Serial EEPROM
• Jedec (JC42.4) SO-DIMM SPD + TS compliant
• Standard voltage operation
Optimized for voltage range: 2.7V to 3.6V
• 100khz and 400khz Compatibility
• Two-wire Serial Interface: I2C/SMBus™ compatible
SMBus Timeout supported
• Schmitt Trigger, filtered inputs for Noise Suppression
• Industry Standard Green (Pb/Halide-free/RoHS Compliant) Package Options
8-pad Very Very Thin DFN (2 x 3 x 0.8mm)
Serial EEPROM Features
• Permanent and Reversible Software Write Protection for the First-half of the Array
Software Procedure to Verify Write Protect Status
• Internally organized as one block of 256-bytes (256 x 8)
• Supports Byte and Page Write operation
Write 1-, 2-, 3-, up to 16-bytes at a time
• Self-timed Write cycle (5ms max)
• High-reliability
Endurance: 1 Million Write Cycles
Data Retention: 100 years
• Low Operating current
EEPROM Write ~1.5mA (typ.)
EEPROM Read ~ 0.2mA (typ.)
Temperature Sensor Features
• 11-bit ADC Temp-to-Digital Converter with 0.125°C resolution
• Programmable hysteresis threshold: off, 0°C, 1.5°C, 3°C, 6 °C
• 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
• Low Operating current
Temperature Sensor Active ~ 0.2mA (typ.)
Integrated
Temperature
Sensor with Serial
Electrically-erasable
and Programmable
Read-only Memory
Atmel AT30TSE002B
Preliminary
8711D–SEEPR–8/10
1 page  
Temperature Sensor with Serial EEPROM
Table 2-2. DC Characteristics
Applicable over recommended operating range:
TAI = –20°C to +125°C, VCC = +2.7v to +3.6V (unless otherwise noted)
Symbol Parameter
Test Condition
VCC1
Supply Voltage
Supply Current
ICC EEPROM READ VCC = 3.6V (2)
ICC EEPROM WRITE VCC = 3.6V (2)
100kHz
100kHz
ICC Temp. Sensor VCC = 3.6V
ICC Timeout active VCC = 3.6V
EEPROM inactive
EEPROM inactive, Temp.
Sensor shutdown
ISB Standby Current VCC =3.6V(3)
ILI Input Leakage Current
ILO Output Leakage Current
VIL Input Low Level(1)
VIH Input High Level(1)
VOL Output Low level VCC = 3.0V
VHV High Voltage Input A0
Vin = VHV = or VSS
Vin = VHV = or VSS
Vin = VHV = or VSS
IOL = 2.1mA
Pin = A0;
VHV - VCC ≥ 4.8V
VHYST Input Hysteresis (SDA, SCL)
TCONV Temp. Sensor Conversion Time
TRES
Temp. Sensor Resolution
Temperature Sensor Accuracy
TACCUR +75°C < Ta < +95°C
TACCUR +40°C < Ta < +125°C
TACCUR -20°C < Ta < +125°C
TCONV Temp. Sensor Conversion Time
TRES
Temp. Sensor Resolution
Note:
1. VIL min and VIH max are reference only and are not tested
2. Sensor in Shutdown Mode
3. EEPROM inactive, sensor in shutdown mode
Min
2.7
-0.6
VHV x0.7
7
0.05 x
VCC
-1.0
-2.0
-3.0
Typ Max Units
3.6 V
0.4 1.0 mA
1.5 3.0 mA
0.2 0.5 mA
0.2 0.5 mA
1.6 4.0 uA
0.1 2.0 uA
0.1 2.0 uA
VHV x 0.3
VHV + 0.5
0.4
V
V
V
10 V
75
0.25
125
V
mS
°C
±0.5
±1
±2
75
0.25
+1.0
+2.0
+3.0
125
°C
°C
°C
mS
°C
8711D–SEEPR–8/10
5
5 Page 
Temperature Sensor with Serial EEPROM
ACKNOWLEDGE (ACK) POLLING: Once the internally-timed write cycle has started and the EEPROM inputs
are disabled, ACK polling can be initiated. This involves sending a start condition followed by the device address
word. The read/write bit is representative of the operation desired. Only if the internal write cycle has completed
will the EEPROM respond with a zero allowing the read or write sequence to continue.
7. EEPROM Write Protection
The device supports permanent and reversible software write protection and, once enabled, write protects the
first-half of the array (00H - 7FH).
PERMANENT SOFTWARE WRITE PROTECTION: The software write protection is enabled by sending a
command similar to a normal write command; to the device which programs the permanent write protect register.
The write protect register is programmed by sending a write command with the device address of ‘0110’ with the
address and data bit being don’t cares (see Table 9-16 and Table 10-1). Once the software write protection has
been enabled, the device will no longer acknowledge the ‘0110’ control byte. The software write protection cannot
be reversed even if the device is powered down. The write cycle time must be observed.
REVERSIBLE SOFTWARE WRITE PROTECTION: The reversible software write protection is enabled by
sending a command, similar to a normal write command; to the device which programs the reversible write protect
register. The write protect register is programmed by sending a write command ‘01100010’ with pins A2 and A1
tied to ground or no connect and pin A0 connected to VHV (see Figure 10-6 and Table 10-1). The reversible write
protection can be reversed by sending a command ‘01100110’ with pin A2 tied to ground or no connect, pin A1
tied to VCC and pin A0 tied to VHV (see Figure 10-6 and Table 10-2).
8. Temperature Sensor Functional Description
Atmel® AT30TSE002B consists of a Delta-Sigma Analog to Digital Converter (ADC) with a band gap type
temperature sensor that monitors and updates its own temperature reading at least eight times per second
converting the readings into digital data bits and latching them into a temperature register that can be read via 2-
wire I2C/SMBus serial interface. The device communicates over a 2-wire I2C/SMBus interface with the bus master
or controller consisting of a serial clock (SCL) and serial bidirectional data bus (SDA) with clock frequencies up to
400Khz. The bus master or controller generates the SCL signal and is used by the AT30TSE002B to receive and
send serial data on the SDA line with the most significant bit transferred first. A pull-up resistor is required on the
SDA pin since it is in an open drain configuration.
8.1.
EVENT Output
The EVENT pin has three operating modes depending on configuration settings. They are Interrupt, Comparator,
and Critical Alarm (Crit_Alarm) modes.
In the Interrupt mode, once a temperature reaches a boundary limit, the AT30TSE002B asserts the EVENT pin. The
EVENT pin will remain asserted until software clears the interrupt by writing a “1” to the EVTCLR bit five in the
configuration register. When the temperature drops below specified limits, the device returns back to either
interrupt or comparator mode as programmed in the configuration register’s EVTMOD bit zero.
In the comparator mode, the EVENT pin remains asserted until the error condition that caused the pin to be
asserted no longer exists and the EVENT pin will clear itself. In the Crit_Alarm mode, when the measured
temperature exceeds Crit_Alarm trip limit, the EVENT pin will remain asserted until the temperature drops below
Crit_Alarm limit minus hysteresis (See Figure 9-1). All event thresholds use hysteresis as programmed in the
configuration register.
8711D–SEEPR–8/10
11
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| PDF Descargar | [ Datasheet AT30TSE002B.PDF ] | |
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