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參數(shù)資料
| 型號： | TMP431BDGKT |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 模擬信號調(diào)理 |
| 英文描述： | SPECIALTY ANALOG CIRCUIT, PDSO8 |
| 封裝： | GREEN, PLASTIC, MSOP-8 |
| 文件頁數(shù)： | 24/40頁 |
| 文件大?。?/td> | 790K |
| 代理商： | TMP431BDGKT |
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Measured
Temperature
THERMLimitandALERTHighLimit
ALERTLowLimitandTHERMLimitHysteresis
THERM
ALERT
SMBusALERT
Read
Time
Read
SBOS441C
– SEPTEMBER 2009 – REVISED FEBRUARY 2011
Figure 21. SMBus Alert Timing Diagram
If multiple devices on the bus respond to the SMBus
Alert command, arbitration during the slave address
Undervoltage Lockout
portion of the SMBus Alert command determines
The
TMP431/32
sense
when
the
power-supply
which device clears its alert status. If the TMP431/32
voltage has reached a minimum voltage level for the
win the arbitration, the ALERT pin becomes inactive
ADC to function. The detection circuitry consists of a
at the completion of the SMBus Alert command. If the
voltage comparator that enables the ADC after the
TMP431/32 lose the arbitration, the ALERT pin
power supply (V+) exceeds 2.45V (typical). The
remains active.
comparator output is continuously checked during a
conversion. The TMP431/32 do not perform a
Shutdown Mode (SD)
temperature conversion if the power supply is not
The TMP431/32 shutdown mode allows the user to
valid. The last valid measured temperature is used for
save maximum power by shutting down all device
the temperature measurement result.
circuitry other than the serial interface, reducing
current consumption to typically less than 3
A; see
General Call Reset
typical
characteristic
curve
Shutdown
Quiescent
The TMP431/32 support reset via the Two-Wire
Current vs Supply Voltage (Figure 6). Shutdown
General
Call
address
00h
(0000
0000b).
The
mode is enabled when the SD bit of the Configuration
TMP431/32 acknowledge the General Call address
Register
1
is
high;
the
device
shuts
down
and respond to the second byte. If the second byte is
immediately, aborting the current conversion. When
06h
(0000
0110b),
the
TMP431/32
execute
a
SD is low, the device maintains a continuous
software reset. This software reset restores the
conversion state.
power-on reset state to all TMP431/32 registers,
aborts any conversion in progress, and clears the
Sensor Fault
ALERT and THERM pins. The TMP431/32 take no
The TMP431/32 can sense a fault at the DXP input
action in response to other values in the second byte.
that results from an incorrect diode connection or an
open circuit. The detection circuitry consists of a
Filtering
voltage comparator that trips when the voltage at
Remote junction temperature sensors are usually
DXP exceeds (V+)
– 0.6V (typical). The comparator
implemented
in
noisy
environments.
Noise
is
output is continuously checked during a conversion. If
frequently generated by fast digital signals and if not
a
fault
is
detected,
the
last
valid
measured
filtered properly can induce errors that corrupt
temperature
is
used
for
the
temperature
temperature measurements. The TMP431/32 have a
measurement result, the OPEN bit (Status Register,
built-in 65kHz filter on the inputs of DXP and DXN to
bit 2) is set high, and, if the alert function is enabled,
minimize the effects of noise. However, a differential
ALERT asserts low.
low-pass filter can help attenuate unwanted coupled
When
not
using
the
remote
sensor
with
the
signals.
Exact
component
values
are
TMP431/32, the DXP and DXN inputs must be
application-specific. It is also recommended that the
connected together to prevent meaningless fault
capacitor value remains between 0pF to 2200pF with
warnings.
a series resistance less than 1k
.
30
2009–2011, Texas Instruments Incorporated
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TMP431CDGKR | 功能描述:板上安裝溫度傳感器 +/-1C Remote and Local Temp Sensor RoHS:否 制造商:Omron Electronics 輸出類型:Digital 配置: 準確性:+/- 1.5 C, +/- 3 C 溫度閾值: 數(shù)字輸出 - 總線接口:2-Wire, I2C, SMBus 電源電壓-最大:5.5 V 電源電壓-最小:4.5 V 最大工作溫度:+ 50 C 最小工作溫度:0 C 關(guān)閉: 安裝風格: 封裝 / 箱體: 設(shè)備功能:Temperature and Humidity Sensor |
| TMP431CDGKT | 功能描述:板上安裝溫度傳感器 +/-1C Remote and Local Temp Sensor RoHS:否 制造商:Omron Electronics 輸出類型:Digital 配置: 準確性:+/- 1.5 C, +/- 3 C 溫度閾值: 數(shù)字輸出 - 總線接口:2-Wire, I2C, SMBus 電源電壓-最大:5.5 V 電源電壓-最小:4.5 V 最大工作溫度:+ 50 C 最小工作溫度:0 C 關(guān)閉: 安裝風格: 封裝 / 箱體: 設(shè)備功能:Temperature and Humidity Sensor |
| TMP431DDGKR | 功能描述:板上安裝溫度傳感器 +/-1C Remote and Local Temp Sensor RoHS:否 制造商:Omron Electronics 輸出類型:Digital 配置: 準確性:+/- 1.5 C, +/- 3 C 溫度閾值: 數(shù)字輸出 - 總線接口:2-Wire, I2C, SMBus 電源電壓-最大:5.5 V 電源電壓-最小:4.5 V 最大工作溫度:+ 50 C 最小工作溫度:0 C 關(guān)閉: 安裝風格: 封裝 / 箱體: 設(shè)備功能:Temperature and Humidity Sensor |
| TMP431DDGKT | 功能描述:板上安裝溫度傳感器 +/-1C Remote and Local Temp Sensor RoHS:否 制造商:Omron Electronics 輸出類型:Digital 配置: 準確性:+/- 1.5 C, +/- 3 C 溫度閾值: 數(shù)字輸出 - 總線接口:2-Wire, I2C, SMBus 電源電壓-最大:5.5 V 電源電壓-最小:4.5 V 最大工作溫度:+ 50 C 最小工作溫度:0 C 關(guān)閉: 安裝風格: 封裝 / 箱體: 設(shè)備功能:Temperature and Humidity Sensor |
| TMP432ADGSR | 功能描述:板上安裝溫度傳感器 Remote & Local Temp Sensor RoHS:否 制造商:Omron Electronics 輸出類型:Digital 配置: 準確性:+/- 1.5 C, +/- 3 C 溫度閾值: 數(shù)字輸出 - 總線接口:2-Wire, I2C, SMBus 電源電壓-最大:5.5 V 電源電壓-最小:4.5 V 最大工作溫度:+ 50 C 最小工作溫度:0 C 關(guān)閉: 安裝風格: 封裝 / 箱體: 設(shè)備功能:Temperature and Humidity Sensor |
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