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PDF EMC1212 Data sheet ( Hoja de datos )
| Número de pieza | EMC1212 | |
| Descripción | BBUS Compliant Dual Temperature Monitor | |
| Fabricantes | SMSC Corporation | |
| Logotipo |  |
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EMC1212
BBUS Compliant Dual
Temperature Monitor
with Beta Compensation
PRODUCT FEATURES
GENERAL DESCRIPTION
APPLICATIONS
The EMC1212 is a temperature sensor that
communicates with a host over a single-wire SMSC
BudgetBus™ Sensor Interface. The EMC1212 monitors
one internal diode and one remote temperature zone.
Packaged in a SOT23-5, the EMC1212 provides an
accurate, low-cost, low-current, solution for critical
temperature monitoring in applications such as
embedded systems or computers. When used in
combination with an SMSC Super I/O host, such as a
keyboard controller, a complete thermal management
system is created. A power down mode extends battery
life in portable applications. The internal 11-bit sigma
delta temperature-to-digital converter provides superb
linearity, high accuracy and excellent noise immunity.
The EMC1212 is designed to operate with 65nm or
90nm PNP substrate transistor used as a thermal diode
with the collector connected to ground.
Desktop and Notebook Computers
Hardware Management
FEATURES
Single Wire BBUS Interface
Resistance Error Correction
Beta Compensation
External Temperature Monitor
— 0.125°C resolution
— ±1°C Accuracy 60°C to 100°C
— Diode Fault Reporting
Internal Temperature Monitor
— Range 0°C to +85°C
— 0.125°C resolution
— ±1.5°C Accuracy 50°C to 70°C
Supply:
— 3.0V to 3.6V
— <5uA in Standby
SIMPLIFIED BLOCK DIAGRAM
EMC1212
Switching
Current
Local Temp
Diode
Datasheet
DP Beta
Comp
&
DN REC
Analog Mux
and
anti-aliasing
filter
11-bit
delta-sigma
ADC
Temperature
Registers
BBUS
Interface
BBUS
SMSC EMC1212
DATASHEET
Revision 1.1 (02-07-07)
1 page  
BBUS Compliant Dual Temperature Monitor with Beta Compensation
Datasheet
CHARACTERISTIC
Temperature Accuracy
Temperature Resolution
Conversion Time per
Channel
Capacitive Load
SYMBOL MIN TYP MAX UNIT
External Temperature Monitor
±0.5 ±1
°C
tCONV
±1 ±3
0.125
21
°C
°C
mS
CONDITIONS
60°C <
< 70°C
TDIODE
<
100°C,
10°C
<
TA
0°C < TDIODE < 125°C
CLOAD
400 pF
Connected across remote diode
2.3 BudgetBus Electrical Characteristics
VDD = 3V to 3.6V, TA = 0°C to 85°C, Typical values are at TA = 27°C unless otherwise noted.
CHARACTERISTIC
SYMBOL MIN TYP MAX UNITS
CONDITIONS
Output High Voltage
Output Low Voltage
Input High Voltage
Input Low Voltage
VOH
VOL
VIH
VIL
2.4
2.4
Input Capacitance
Bus Single Bit High Time
or Low Time
Inactive Time
CIN
TTHLOIGWH /
TINACTIVE
8
132
V
0.4 V
V
0.4 V
AC Parameters
10 pF
10 12
us
us
Power Down Time
Rise Time
Fall Time
TPWRDN
TRISE
TFALL
264
us
400 ns
400 ns
2mA Sourcing current
4mA Sinking Current
Between Consecutive packets or
after power up
To initiate power down
2.4
BudgetBus Protocol
The EMC1212 communicates with a host controller, such as the SMSC KBC1100, through the
proprietary single wire SMSC BudgetBus™ Sensor Interface known as BBUS. The BBUS is a single
wire serial communication protocol between the computer host and its peripheral devices. Please refer
to the BBUS Specification for detailed information about the modes of operation.
The BudgetBus timing is shown in Figure 2.1. This timing applies to all BudgetBus communication bits.
SMSC EMC1212
5
DATASHEET
Revision 1.1 (02-07-07)
5 Page 
BBUS Compliant Dual Temperature Monitor with Beta Compensation
Datasheet
Chapter 4 Typical Operating Curves
To be determined based on characterization.
SMSC EMC1212
11
DATASHEET
Revision 1.1 (02-07-07)
11 Page | ||
| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet EMC1212.PDF ] | |
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