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參數資料
| 型號： | SA56004HD,118 |
| 廠商： | NXP Semiconductors |
| 文件頁數： | 19/43頁 |
| 文件大小： | 516K |
| 描述： | IC TEMP SENSOR DIGITAL 8SOIC |
| 標準包裝： | 2,500 |
| 功能： | 溫度監控系統（傳感器） |
| 傳感器類型： | 內部和外部 |
| 感應溫度： | -40°C ~ 125°C |
| 精確度： | ±3°C（最小值） |
| 拓撲： | ADC（三角積分型），多路復用器，寄存器庫 |
| 輸出類型： | I²C?/SMBus? |
| 輸出警報： | 是 |
| 輸出風扇： | 是 |
| 電源電壓： | 3 V ~ 5.5 V |
| 工作溫度： | -40°C ~ 125°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 8-SOIC（0.154"，3.90mm 寬） |
| 供應商設備封裝： | 8-SO |
| 包裝： | 帶卷 (TR) |
| 其它名稱： | 935274554118 SA56004HD-T SA56004HD-T-ND |
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SA56004X
All information provided in this document is subject to legal disclaimers.
?NXP B.V. 2013. All rights reserved.
Product data sheet
Rev. 7 25 February 2013
19 of 43
NXP Semiconductors
SA56004X
Digital temperature sensor with overtemperature alarms
Event F: Three consecutive measurements have been made with the remote
temperature below the RCS - TH threshold; the T_CRIT
output is de-activated (goes
HIGH).
Event G: The remote temp falls below the Remote LOW setpoint.
Event H: Three consecutive measurements are made with the temp below the Remote
LOW setpoint; ALERT
output is activated (goes LOW).
Event I: The ALERT
output is de-activated (goes HIGH) after a above_low_limit
temperature measurement is completed.
7.9.4 Temperature measurement
To measure the remote temperature or the temperature of an externally attached diode,
the device automatically forces two successive currents of about 160 mA and 10 mA at D+
pin. It measures the voltage (V
BE
) between D+ and D-, detects the difference between the
two V
BE
voltages or the DV
BE
and then converts the DV
BE
into a temperature data using
the basic PTAT voltage formula as shown in Equation 1
. The device typically takes about
38 ms to perform a measurement during each conversion period or cycle, which is
selectable by programming the conversion rate register.
(1)
Where:
n = diode ideality factor
k = Boltzmanns constant
T = absolute temperature (癒) = 273 癈 + T (癈)
q = electron charge
ln = natural logarithm
l2, l1 = two source currents
Because the device does not directly convert the sensed V
BE
as in the old method of
temperature measurement systems, the V
BE
calibration is not required. Furthermore, the
device remote temperature error is adjusted at the manufacturer to meet the
specifications with the use of the reference diode-connected transistors such as the
2N3904/2N3906. The diode type to be used in customer applications must have the
characteristics as close to the 2N3904/2N3906 as possible in order to obtain optimal
results. Finally, to prevent the effects of system noise on the measured V
BE
signals, an
external capacitor of about 2200 pF connected between the D+ and D- pins as well as the
grounded-shield cable for the diode connection wires are recommended.
7.9.5 Diode fault detection
The SA56004X is designed with circuitry to detect the fault conditions of the remote diode.
When the D+ pin is shorted to V
DD
or floating, the Remote Temperature High Byte (RTHB)
register is loaded with +127 癈, the Remote Temperature Low Byte (RTLB) register is
loaded with 0 癈, and the OPEN bit (bit 2 of the Status register) is set. Under the above
conditions of D+ shorted to V
DD
or floating, if the Remote T_CRIT
setpoint is set less than
+127 癈, and T_CRIT Mask are disabled, then, the T_CRIT
output pins will be pulled
V
BE
n
kT
q
----- -
?/DIV>
l2
l1
---- -
?nbsp ?/DIV>
?nbsp ?/DIV>
ln
?/DIV>
=
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相關代理商/技術參數 |
參數描述 |
|---|---|
| SA56004HDP | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:1 Degrees Celcious accurate, SMBus-compatible, 8-pin, remote/local digital temperature sensor with over temperature alarms |
| SA56004HDP,118 | 功能描述:板上安裝溫度傳感器 I2C LOC +/- 2OC AND 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 關閉: 安裝風格: 封裝 / 箱體: 設備功能:Temperature and Humidity Sensor |
| SA56004HDP-T | 功能描述:板上安裝溫度傳感器 I2C LOC +/- 2OC AND REM +/- 1OC TS 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 關閉: 安裝風格: 封裝 / 箱體: 設備功能:Temperature and Humidity Sensor |
| SA56004HD-T | 功能描述:板上安裝溫度傳感器 I2C LOC +/- 2OC AND REM +/- 1OC TS 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 關閉: 安裝風格: 封裝 / 箱體: 設備功能:Temperature and Humidity Sensor |
| SA56004X | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:1 Degrees Celcious accurate, SMBus-compatible, 8-pin, remote/local digital temperature sensor with over temperature alarms |
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