LM95213EB/NOPB National Semiconductor, LM95213EB/NOPB Datasheet - Page 10

• Manufacturer Part Number: LM95213EB/NOPB
• Description: BOARD EVALUATION FOR LM95213
• Manufacturer: National Semiconductor
• Series: PowerWise®r

Specifications of LM95213EB/NOPB

• Sensor Type: Temperature
• Sensing Range: -40°C ~ 140°C
• Interface: SMBus (2-Wire/I²C)
• Sensitivity: ±1°C
• Voltage - Supply: 3 V ~ 3.6 V
• Embedded: No
• Utilized Ic / Part: LM95213
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: LM95213EB

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1.1 CONVERSION SEQUENCE
The LM95213 takes approximately 92 ms to convert the Local
Temperature, Remote Temperatures 1 and 2, and to update
all of its registers. These conversions for each thermal diode
are addressed in a round robin sequence. Only during the
conversion process the busy bit (D7) in Status register (02h)
is high. The conversion rate may be modified by the Conver-
sion Rate bits found in the Configuration Register (03h).
When the conversion rate is modified a delay is inserted be-
tween each round of conversions, the actual time for each
round remains at 92 ms (typical all channels enabled). The
time a round takes depends on the number of channels that
are on. Different conversion rates will cause the LM95213 to
draw different amounts of average supply current as shown
in Figure 1. This curve assumes all the channels are on. If
channels are turned off the average current will drop since the
round robin time will decrease and the shutdown time will in-
crease during each conversion interval.
Temperature Value Registers with signed format
— Most-Significant-Byte (MSB) and Least-Significant-
— MSB and LSB Remote Temperature 1
— MSB and LSB Remote Temperature 2
Temperature Value Registers with unsigned format
— MSB and LSB Remote Temperature 1
— MSB and LSB Remote Temperature 2
Diode Configuration Registers
— Remote 1 Offset
— Remote 2 Offset
General Configuration Registers
— Configuration (Standby, Conversion Rate)
— Channel Conversion Enable
— Filter Setting for Remote 1 and 2
— 1-Shot
Status Registers
— Main Status Register (Busy bit, Not Ready, Status
— Status 1 (diode fault)
— Status 2 (TCRIT1)
— Status 3 (TCRIT2)
— Status 4 (TCRIT3)
Mask Registers
— TCRIT1 Mask
— TCRIT2 Mask
— TCRIT3 Mask
Limit Registers
— Local Tcrit Limit
— Remote 1 Tcrit-1 Limit
— Remote 2 Tcrit-1 Limit
— Remote 1 Tcrit-2 and Tcrit-3 Limit
— Remote 2 Tcrit-2 and Tcrit-3 Limit
— Common Tcrit Hysteresis
Manufacturer ID Register
Revision ID Register
Byte (LSB) Local Temperature
Register 1 to 4 Flags)
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1.2 POWER-ON-DEFAULT STATES
LM95213 always powers up to these known default states.
The LM95213 remains in these states until after the first con-
version.
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1.3 SMBus INTERFACE
The LM95213 operates as a slave on the SMBus, so the
SMBCLK line is an input and the SMBDAT line is bidirectional.
The LM95213 never drives the SMBCLK line and it does not
support clock stretching. According to SMBus specifications,
the LM95213 has a 7-bit slave address. Three SMBus device
address can be selected by connecting A0 (pin 6) to either
Low, Mid-Supply or High voltages. The LM95213 has the fol-
lowing SMBus slave address:
FIGURE 1. Conversion Rate Effect on Power Supply
Output Pin
All Temperature readings set to 0°C until the end of the
first conversion
Remote offset for all channels 0°C
Configuration: Active converting
Continuous conversion with all channels enabled,
time = 1s
Enhanced digital filter enabled for Remote 1 and 2
Status Registers depends on state of thermal diode
inputs
Local and Remote Temperature Limits for TCRIT1,
TCRIT2 and TCRIT3 outputs:
TCRIT1
TCRIT2
TCRIT3
Manufacturers ID set to 01h
Revision ID set to 7Bh
Remote 2
Masked,
(°C)
110
85
85
Temperature Channel Limit
Current
Remote 1
Masked,
(°C)
110
85
85
30013806
Masked,
Masked,
Local
(°C)
85
85
85