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TMP411 Datasheet(PDF) 14 Page - Burr-Brown (TI)

[Old version datasheet] Texas Instruments acquired Burr-Brown Corporation.
Part # TMP411
Description  짹1째C Remote and Local TEMPERATURE SENSOR with N-Factor and Series Resistance Correction
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Manufacturer  BURR-BROWN [Burr-Brown (TI)]
Direct Link  http://www.burr-brown.com
Logo BURR-BROWN - Burr-Brown (TI)

TMP411 Datasheet(HTML) 14 Page - Burr-Brown (TI)

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TMP411
SBOS383A − FEBRUARY 2007
www.ti.com
14
Table 8. N-Factor Range
NADJUST
BINARY
HEX
DECIMAL
N
01111111
7F
127
1.747977
00001010
0A
10
1.042759
00001000
08
8
1.035616
00000110
06
6
1.028571
00000100
04
4
1.021622
00000010
02
2
1.014765
00000001
01
1
1.011371
00000000
00
0
1.008
11111111
FF
−1
1.004651
11111110
FE
−2
1.001325
11111100
FC
−4
0.994737
11111010
FA
−6
0.988235
11111000
F8
−8
0.981818
11110110
F6
−10
0.975484
10000000
80
−128
0.706542
MINIMUM AND MAXIMUM REGISTERS
The TMP411 stores the minimum and maximum
temperature measured since power-on, chip-reset, or
minimum and maximum register reset for both the local
and remote channels. The Local Temperature Minimum
Register may be read by reading the high byte from pointer
address 30h and the low byte from pointer address 31h.
The Local Temperature Minimum Register may also be
read by using a two-byte read command from pointer
address 30h. The Local Temperature Minimum Register is
reset at power-on, by executing the chip-reset command,
or by writing any value to any of pointer addresses 30h
through 37h. The reset value for these registers is
FFh/F0h.
The Local Temperature Maximum Register may be read
by reading the high byte from pointer address 32h and the
low byte from pointer address 33h. The Local Temperature
Maximum Register may also be read by using a two-byte
read command from pointer address 32h. The Local
Temperature Maximum Register is reset at power-on by
executing the chip reset command, or by writing any value
to any of pointer addresses 30h through 37h. The reset
value for these registers is 00h/00h.
The Remote Temperature Minimum Register may be read
by reading the high byte from pointer address 34h and the
low byte from pointer address 35h. The Remote
Temperature Minimum Register may also be read by using
a two-byte read command from pointer address 34h. The
Remote Temperature Minimum Register is reset at
power-on by executing the chip reset command, or by
writing any value to any of pointer addresses 30h through
37h. The reset value for these registers is FFh/F0h.
The Remote Temperature Maximum Register may be read
by reading the high byte from pointer address 36h and the
low byte from pointer address 37h. The Remote
Temperature Maximum Register may also be read by
using a two-byte read command from pointer address 36h.
The Remote Temperature Maximum Register is reset at
power-on by executing the chip reset command, or by
writing any value to any of pointer addresses 30h through
37h. The reset value for these registers is 00h/00h.
SOFTWARE RESET
The TMP411 may be reset by writing any value to Pointer
Register FCh. This restores the power-on reset state to all
of the TMP411 registers as well as abort any conversion
in process and clear the ALERT and THERM pins.
The TMP411 also supports reset via the two-wire general
call address (00000000). The TMP411 acknowledges the
general call address and responds to the second byte. If
the second byte is 00000110, the TMP411 executes a
software reset. The TMP411 takes no action in response
to other values in the second byte.
CONSECUTIVE ALERT REGISTER
The value in the Consecutive Alert Register (address 22h)
determines
how
many
consecutive
out-of-limit
measurements must occur on a measurement channel
before the ALERT signal is activated. The value in this
register does not affect bits in the Status Register. Values
of one, two, three, or four consecutive conversions can be
selected; one conversion is the default. This function
allows additional filtering for the ALERT pin. The
consecutive alert bits are shown in Table 9.
Table 9. Consecutive Alert Register
CONSECUTIVE ALERT REGISTER
(READ = 22h, WRITE = 22h, POR = 80h)
C2
C1
C0
NUMBER OF CONSECUTIVE
OUT-OF-LIMIT MEASUREMENTS
0
0
0
1
0
0
1
2
0
1
1
3
1
1
1
4
NOTE: Bit 7 of the Consecutive Alert Register controls the
enable/disable of the timeout function. See the Timeout
Function section for a description of this feature.


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