emc1201 Standard Microsystems Corp., emc1201 Datasheet

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emc1201

Manufacturer Part Number
emc1201
Description
Single/dual Single-wire Temp Sensor In Sot23-5
Manufacturer
Standard Microsystems Corp.
Datasheet
PRODUCT FEATURES
General Description
The EMC1201 and EMC1202 are temperature sensors
that communicate with a host over a single-wire SMSC
BudgetBus™ Sensor Interface. The EMC1201 has an
internal temperature sensor and the EMC1202 adds one
remote diode. Packaged in a SOT23-5, the EMC1201
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.
SMSC EMC1201/EMC1202
EMC1201
EMC1202
NUMBER
PART
External
Diode for
EMC1202
Only
DN
DP
TEMPERATURE
INTERNAL
MONITOR
Switching
Current
1
1
TEMPERATURE
Local Temp
EXTERNAL
Analog
MONITOR
Diode
Mux
Simplified Block Diagram
EMC1201/EMC1202
0
1
DATASHEET
delta-sigma
11-bit
ADC
Features
Applications
Single-wire SMSC BudgetBus™ Sensor Interface
Low Power, 3.0V to 3.6V Supply
External Temperature Sensor
Self Contained Internal Temperature Sensor
SOT23-5 Lead-free RoHS Compliant Packages
Desktop and Notebook Computers
Thermostats
Smart batteries
Industrial/Automotive
Other Electronic Systems
— < 50uA at 1 conversion per second
— < 3uA in Standby
— Range -63.875
— 0.125
— Diode Fault Reporting
— Range 0
— 0.125
Single/Dual Single-Wire Temp
Sensor in SOT23-5 Using
SMSC BudgetBus
Interface
EMC1201/EMC1202
±
±
1
3
º
º
C Accuracy 60
C Accuracy 0
º
º
Temperature
C resolution
C resolution
º
Registers
Interface
C to +85
BBUS
º
C to +191.875
º
º
º
C to 85
C to 100
C
º
C
º
º
C
Revision 1.0 (06-10-08)
C
TM
BBUS
Sensor
Datasheet

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emc1201 Summary of contents

Page 1

... SMSC BudgetBus™ Sensor Interface. The EMC1201 has an internal temperature sensor and the EMC1202 adds one remote diode. Packaged in a SOT23-5, the EMC1201 provides an accurate, low-cost, low-current, solution for critical temperature monitoring in applications such as embedded systems or computers. When used in ...

Page 2

... EMC1201-AGZQ- PIN SOT23-5 LEAD-FREE ROHS COMPLIANT PACKAGE EMC1202-AGZQ- PIN SOT23-5 LEAD-FREE ROHS COMPLIANT PACKAGE 80 ARKAY DRIVE, HAUPPAUGE, NY 11788 (631) 435-6000, FAX (631) 273-3123 Copyright © 2008 SMSC or its subsidiaries. All rights reserved. Circuit diagrams and other information relating to SMSC products are included as a means of illustrating typical applications. Consequently, complete information sufficient for construction purposes is not necessarily given ...

Page 3

... Single/Dual Single-Wire Temp Sensor in SOT23-5 Using SMSC BudgetBus Datasheet Chapter 1 Pin Configuration Figure 1.1 EMC1201 and EMC1202 Pin Configuration 1.1 Pin Description Table 1.1 EMC1201 and EMC1202 Pin Description PIN PIN NO. VDD 1 GND 2 BBUS 3 GND/DP 4 GND/DN 5 SMSC EMC1201/EMC1202 TM Sensor Interface VDD 1 5 GND/DN 2 GND ...

Page 4

... Absolute Maximum Ratings Table 1.2 EMC1201/EMC1202 Maximum Ratings DESCRIPTION Supply Voltage V DD Voltage on any other pin Operating Temperature Range Storage Temperature Range Lead Temperature Range Package Thermal Characteristics for SOT23-5 Power Dissipation Thermal Resistance(at 0 air flow) ESD Rating, All Pins Human Body Model Note: Stresses above those listed could cause damage to the device ...

Page 5

... Accuracy External Temperature Measurement (EMC1202 only) Temperature Accuracy Remote Diode 60°C to 100°C Remote Diode 0°C to 125°C ADC Resolution Conversion Time per sensor SMSC EMC1201/EMC1202 TM Sensor Interface Table 2.1 Electrical Characteristics = 0°C to +85°C, Typical values 27°C unless otherwise noted A A ...

Page 6

... Chapter 3 Product Description The EMC1201 and EMC1202 are SOT23 temperature sensors with a proprietary single wire SMSC BudgetBus™ Sensor Interface. Temperature information is communicated to a host device via the serial bus. All intelligence regarding the interpretation of temperature resides in the host. shows a typical system overview: ...

Page 7

... SMSC BudgetBus™ Sensor Interface The EMC1201 and EMC1202 communicate with a host controller, such as the 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 ...

Page 8

... Active Mode: The host initiates active mode by enabling a weak pull up on the BBUS. In this mode, the EMC1201 and EMC1202 continuously convert temperature data. During the time that the device is actively converting a temperature, the BBUS is in tri-state mode, and the Host places a weak pull-up on the bus to prevent it from floating ...

Page 9

... Single/Dual Single-Wire Temp Sensor in SOT23-5 Using SMSC BudgetBus Datasheet 3.5 Conversion Rate The conversion rate can be controlled by the host. This is accomplished by periodically placing the device in standby as described in SMSC EMC1201/EMC1202 TM Sensor Interface Section 3.3, "Power Modes". 9 DATASHEET Revision 1.0 (06-10-08) ...

Page 10

... INDEX AREA (D/2 x E1/ TOP VIEW C SEATING PLANE ccc C SIDE VIEW LEADS 3-D VIEWS Figure 4.1 EMC1201/EMC1202 5 Pin SOT Package Outline; 1.6mm Body Width, 0.95mm Pitch SEE DETAIL "A" END VIEW H A2 GAUGE PLANE A 0. DETAIL " ...

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