Datasheet
Table Of Contents
- Features
- Applications
- Key Specifications
- Description
- Absolute Maximum Ratings
- Operating Ratings
- Temperature-to-Digital Converter Characteristics
- Logic Electrical Characteristics
- DIGITAL DC CHARACTERISTICS
- SMBus DIGITAL SWITCHING CHARACTERISTICS
- Functional Description
- LM86 REGISTERS
- COMMAND REGISTER
- LOCAL and REMOTE TEMPERATURE REGISTERS (LT, RTHB, RTLB)
- STATUS REGISTER (SR)
- CONFIGURATION REGISTER
- CONVERSION RATE REGISTER
- LOCAL and REMOTE HIGH SETPOINT REGISTERS (LHS, RHSHB, and RHSLB)
- LOCAL and REMOTE LOW SETPOINT REGISTERS (LLS, RLSHB, and RLSLB)
- REMOTE TEMPERATURE OFFSET REGISTERS (RTOHB and RTOLB)
- LOCAL and REMOTE T_CRIT REGISTERS (RCS and LCS)
- T_CRIT HYSTERESIS REGISTER (TH)
- FILTER and ALERT CONFIGURE REGISTER
- MANUFACTURERS ID REGISTER
- DIE REVISION CODE REGISTER
- APPLICATION HINTS
- Data Sheet Revision History
TEMPERATURE
n
n+1 n+2 n+3 n+4 n+5
SAMPLE NUMBER
RDTS Measurement
Status Register: RTDS High
LM86
SNIS114E –DECEMBER 2001–REVISED MARCH 2013
www.ti.com
Fault Queue
In order to suppress erroneous ALERT or T_CRIT triggering the LM86 incorporates a Fault Queue. The Fault
Queue acts to insure a remote temperature measurement is genuinely beyond a HIGH, LOW or T_CRIT setpoint
by not triggering until three consecutive out of limit measurements have been made, see Figure 14. The fault
queue defaults off upon power-up and may be activated by setting bit D0 in the Configuration register (09h) to
“1”.
Figure 14. Fault Queue Temperature Response Diagram
One-Shot Register
The One-Shot register is used to initiate a single conversion and comparison cycle when the device is in standby
mode, after which the device returns to standby. This is not a data register and it is the write operation that
causes the one-shot conversion. The data written to this address is irrelevant and is not stored. A zero will
always be read from this register.
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