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TMP422 데이터시트(PDF) 9 Page - Burr-Brown (TI)

[Old version datasheet] Texas Instruments acquired Burr-Brown Corporation. Click here to check the latest version.
부품명 TMP422
상세설명  짹1째C Remote and Local TEMPERATURE SENSOR in SOT23-8
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제조업체  BURR-BROWN [Burr-Brown (TI)]
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TMP422 데이터시트(HTML) 9 Page - Burr-Brown (TI)

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POINTER REGISTER
One-ShotStartRegister
ConfigurationRegisters
StatusRegister
IdentificationRegisters
N-FactorCorrectionRegisters
ConversionRateRegister
LocalandRemoteTemperatureRegisters
SDA
SCL
PointerRegister
I/O
Control
Interface
SoftwareReset
REGISTER INFORMATION
TMP421
TMP422
SBOS398A – JULY 2007 – REVISED SEPTEMBER 2007
Table 2. Decimal Fraction Temperature Data
Format (Local and Remote Temperature Low
Figure 13 shows the internal register structure of the
Bytes)
TMP421/22. The 8-bit Pointer Register is used to
TEMPERATURE REGISTER LOW BYTE VALUE
address a given data register. The Pointer Register
(0.0625
°C RESOLUTION)(1)
TEMP
identifies which of the data registers should respond
(
°C)
STANDARD AND EXTENDED BINARY
HEX
to a read or write command on the Two-Wire bus.
0
0000 0000
00
This register is set with every write command. A write
0.0625
0001 0000
10
command must be issued to set the proper value in
0.1250
0010 0000
20
the
Pointer
Register
before
executing
a
read
0.1875
0011 0000
30
command. Table 3 describes the pointer address of
0.2500
0100 0000
40
the TMP421/22 registers. The power-on reset (POR)
0.3125
0101 0000
50
value of the Pointer Register is 00h (0000 0000b).
0.3750
0110 0000
60
0.4375
0111 0000
70
0.5000
1000 0000
80
0.5625
1001 0000
90
0.6250
1010 0000
A0
0.6875
1011 0000
B0
0.7500
1100 0000
C0
0.8125
1101 0000
D0
0.8750
1110 0000
E0
0.9385
1111 0000
F0
(1) Resolution is 0.0625
°C/count. All possible values are shown.
The TMP421/22 contain multiple registers for holding
Figure 13. Internal Register Structure
configuration information, temperature measurement
results, and status information. These registers are
described in Figure 13 and Table 3.
Table 3. Register Map
BIT DESCRIPTION
POINTER
POR
(HEX)
(HEX)
7
6
5
4
3
2
1
0
REGISTER DESCRIPTION
00
00
LT11
LT10
LT9
LT8
LT7
LT6
LT5
LT4
Local Temperature (High Byte)(1)
01
00
RT11
RT10
RT9
RT8
RT7
RT6
RT5
RT4
Remote Temperature 1 (High Byte)(1)
02
00
RT11
RT10
RT9
RT8
RT7
RT6
RT5
RT4
Remote Temperature 2 (High Byte)(1)(2)
08
BUSY
0
0
0
0
0
0
0
Status Register
09
00
0
SD
0
0
0
RANGE
0
0
Configuration Register 1
0A
1C/3C(2)
0
0
REN2(2)
REN
LEN
RC
0
0
Configuration Register 2
0B
07
0
0
0
0
0
R2
R1
R0
Conversion Rate Register
0F
X
X
X
X
X
X
X
X
One-Shot Start(3)
10
00
LT3
LT2
LT1
LT0
0
0
nPVLD
0
Local Temperature (Low Byte)
11
00
RT3
RT2
RT1
RT0
0
0
nPVLD
OPEN
Remote Temperature 1 (Low Byte)
12
00
RT3
RT2
RT1
RT0
0
0
nPVLD
OPEN
Remote Temperature 2 (Low Byte)(2)
21
00
NC7
NC6
NC5
NC4
NC3
NC2
NC1
NC0
N Correction 1
22
00
NC7
NC6
NC5
NC4
NC3
NC2
NC1
NC0
N Correction 2(2)
FC
X
X
X
X
X
X
X
X
Software Reset(4)
FE
55
0
1
0
1
0
1
0
1
Manufacturer ID
0
0
1
0
0
0
0
1
TMP421 Device ID
FF
21
0
0
1
0
0
0
1
0
TMP422 Device ID
(1)
Compatible with Two-Byte Read; see Figure 18.
(2)
TMP422 only.
(3)
X = undefined. Writing any value to this register initiates a one-shot start; see the One-Shot Conversion section.
(4)
X = undefined. Writing any value to this register initiates a software reset; see the Software Reset section.
Copyright © 2007, Texas Instruments Incorporated
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