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TMP411CD bảng dữ liệu(PDF) 36 Page - Texas Instruments

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Giải thích chi tiết về linh kiện  TMP411 ±1°C and TMP411D ±0.8°C Remote and Local Temperature Sensor With N-Factor and Series Resistance Correction
PDF  61 Pages
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TMP411CD bảng dữ liệu(HTML) 36 Page - Texas Instruments

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power dissipation to balance with the temperature register update rate. Table 8-5 lists the conversion rate
options and corresponding current consumption.
Table 8-5. Conversion Rate Register
CONVERSION RATE REGISTER (READ = 04h, WRITE = 0Ah, POR = 08h
R7
R6
R5
R4
R3
R2
R1
R0
CONVERSIONS
PER SECOND
AVERAGE IQ
(TYPICAL) (µA)
TMP411 (Legacy chip)
AVERAGE IQ
(TYPICAL)(µA)
TMP411 (New chip)
TMP411D
V+ = 2.7V
V+ = 5.5V
V+ = 2.7V and 5.5V
0
0
0
0
0
0
0
0
0.0625
11
32
1.5
0
0
0
0
0
0
0
1
0.125
17
38
1.8
0
0
0
0
0
0
1
0
0.25
28
49
2.5
0
0
0
0
0
0
1
1
0.5
47
69
3.8
0
0
0
0
0
1
0
0
1
80
103
6.5
0
0
0
0
0
1
0
1
2
128
155
12
0
0
0
0
0
1
1
0
4
190
220
23
07h to 0Fh
8
373
413
45
8.9 N-Factor Correction Register
The TMP411/TMP411D allows for a different n-factor value to convert remote channel measurements to
temperature. The remote channel uses sequential current excitation to extract a differential VBE voltage
measurement to determine the temperature of the remote transistor. Equation 1 relates the voltage and
temperature.
2
BE2
BE1
1
I
nkT
V
V
ln
q
I
§
·
¨
¸
©
¹
(1)
The value n is a characteristic of the particular transistor used for the remote channel. The default value for the
TMP411/TMP411D is n = 1.008. The value in the Table 8-6 adjusts the effective n-factor according to Equation 2
and Equation 3:
eff
ADJUST
1.008 300
n
(300 N
)
u
(2)
ADJUST
eff
300
1.008
N
300
n
§
·
u
¨
¸
©
¹
(3)
The n-correction value must be stored in two’s-complement format, yielding an effective data range from −128 to
127, as listed in Table 8-6. The n-correction value is written to and read from pointer address 18h. The register
power-on-reset value is 00h, which is not effected unless the value is written to.
TMP411, TMP411D
SBOS383E – DECEMBER 2006 – REVISED JULY 2025
www.ti.com
36
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Copyright © 2025 Texas Instruments Incorporated
Product Folder Links: TMP411 TMP411D



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