參數(shù)資料
型號(hào)： TMP435ADGST
廠商： TEXAS INSTRUMENTS INC
元件分類： 模擬信號(hào)調(diào)理
英文描述： SPECIALTY ANALOG CIRCUIT, PDSO10
封裝： GREEN, PLASTIC, MSOP-10
文件頁數(shù)： 9/31頁
文件大?。?/td> 477K
代理商： TMP435ADGST
www.ti.com
SBOS495A – MARCH 2010 – REVISED APRIL 2010
Conversion Rate Register
If the Beta Compensation Configuration Register is
set to '0111' (beta correction disabled) for a given
The Conversion Rate Register (pointer address 0Ah)
channel, the automatic detection is bypassed and the
controls the rate at which temperature conversions
temperature
is
measured
assuming
a
are performed. This register adjusts the idle time
diode-connected sensor. A PNP transistor may
between conversions but not the conversion timing
continue to be GND collector-connected in this mode,
itself, thereby allowing the TMP435 power dissipation
but no beta compensation factor is applied. When the
to be balanced with the temperature register update
beta correction is set to '0111' or the sensor is
rate. Table 7 shows the conversion rate options and
diode-connected (base shorted to collector), the
corresponding current consumption.
n-factor used by the TMP435 is 1.008. When the beta
correction
configuration
is
set
to
'1xxx'
(beta
Beta Compensation Configuration Register
correction
enabled)
and
the
sensor
is
GND
collector-connected (PNP collector to ground), the
If the Beta Compensation Configuration Register is
n-factor used by the TMP435 is 1.000. Table 8 shows
set to '1xxx' (beta correction enabled) for a given
the read value for the selected beta ranges and the
channel at the beginning of each temperature
appropriate n-factor used for each conversion.
conversion, the TMP435 automatically detects if the
sensor
is
diode-connected
or
GND
collector-connected, selects the proper beta range,
and measures the sensor temperature appropriately.
Table 7. Conversion Rate Register
CONVERSION RATE REGISTER (Read = 04h, Write = 0Ah, POR = 07h)
AVERAGE IQ (TYP)
(mA)
R7
R6
R5
R4
R3
R2
R1
R0
CONVERSION/SEC
VS = 2.7V VS = 5.5V
0
0.0625
11
32
0
1
0.125
17
38
0
1
0
0.25
28
49
0
1
0.5
47
69
0
1
0
1
80
103
0
1
0
1
2
128
155
0
1
0
4
190
220
07h to 0Fh
8
373
413
Table 8. Beta Compensation Configuration Register
BCx3-BCx0
BETA RANGE DESCRIPTION
n-FACTOR
TIME
1000
Automatically selected range 0 (0.10 < beta < 0.18)
1.000
126ms
1001
Automatically selected range 1 (0.16 < beta < 0.26)
1.000
126ms
1010
Automatically selected range 2 (0.24 < beta < 0.43)
1.000
126ms
1011
Automatically selected range 3 (0.35 < beta < 0.78)
1.000
126ms
1100
Automatically selected range 4 (0.64 < beta < 1.8)
1.000
126ms
1101
Automatically selected range 5 (1.4 < beta < 9.0)
1.000
126ms
1110
Automatically selected range 6 (6.7 < beta < 40.0)
1.000
126ms
1111
Automatically selected range 7 (beta > 27.0)
1.000
126ms
1111
Automatically detected diode connected sensor
1.008
93ms
0000
Manually selected range 0 (0.10 < beta < 0.5)
1.000
93ms
0001
Manually selected range 1 (0.13 < beta < 1.0)
1.000
93ms
0010
Manually selected range 2 (0.18 < beta < 2.0)
1.000
93ms
0011
Manually selected range 3 (0.3 < beta < 25)
1.000
93ms
0100
Manually selected range 4 (0.5 < beta < 50)
1.000
93ms
0101
Manually selected range 5 (1.1 < beta < 100)
1.000
93ms
0110
Manually selected range 6 (2.4 < beta < 150)
1.000
93ms
0111
Manually disabled beta correction
1.008
93ms
Copyright 2010, Texas Instruments Incorporated
17
Product Folder Link(s): TMP435
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