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參數資料
型號: LM20SITLXEP
廠商: National Semiconductor Corporation
元件分類: 溫度/濕度傳感器
英文描述: Enhanced Plastic 2.4V, 10uA, SC70, micro SMD Temperature Sensor
中文描述: 增強塑料2.4V的,為10uA,SC70封裝,微型貼片溫度傳感器
文件頁數: 6/9頁
文件大小: 250K
代理商: LM20SITLXEP
Mounting
(Continued)
Capacitive Loads
The LM20EP handles capacitive loading well. Without any
precautions, the LM20EP can drive any capacitive load less
than 300 pF as shown in
Figure 4
. Over the specified tem-
perature range the LM20EP has a maximum output imped-
ance of 160
. In an extremely noisy environment it may be
necessary to add some filtering to minimize noise pickup. It
is recommended that 0.1 μF be added from V
+
to GND to
bypass the power supply voltage, as shown in
Figure 5
. In a
noisy environment it may even be necessary to add a ca-
pacitor from the output to ground with a series resistor as
shown in
Figure 5
. A 1 μF output capacitor with the 160
maximum output impedance and a 200
series resistor will
form a 442 Hz lowpass filter. Since the thermal time constant
of the LM20EP is much slower, the overall response time of
the LM20EP will not be significantly affected.
SC70-5
no heat sink
θ
JA
(C/W)
412
SC70-5
small heat sink
θ
JA
(C/W)
350
T
J
T
A
(C)
0.2
T
J
T
A
(C)
0.19
Still air
SC70-5
no heat sink
θ
JA
(C/W)
312
SC70-5
small heat sink
θ
JA
(C/W)
266
T
J
T
A
(C)
0.17
T
J
T
A
(C)
0.15
Moving air
See
Figure 1
for PCB layout samples.
micro SMD
no heat sink
θ
JA
(C/W)
340
micro SMD
small heat fin
θ
JA
(C/W)
TBD
T
J
T
A
(C)
0.18
T
J
T
A
(C)
TBD
Still air
micro SMD
no heat sink
θ
JA
(C/W)
TBD
micro SMD
small heat fin
θ
JA
(C/W)
TBD
T
J
T
A
(C)
TBD
T
J
T
A
(C)
TBD
Moving air
FIGURE 3. Temperature Rise of LM20EP Due to
Self-Heating and Thermal Resistance (
θ
JA
)
20099915
FIGURE 4. LM20EP No Decoupling Required for
Capacitive Loads Less than 300 pF.
R (
)
200
470
680
1 k
C (μF)
1
0.1
0.01
0.001
20099916
20099933
FIGURE 5. LM20EP with Filter for Noisy Environment and Capacitive Loading greater than 300 pF. Either placement
of resistor as shown above is just as effective.
L
www.national.com
6
相關PDF資料
PDF描述
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相關代理商/技術參數
參數描述
LM20SITP 制造商:NSC 制造商全稱:National Semiconductor 功能描述:2.4V, 10レA, SC70, micro SMD Temperature Sensor
LM20SITPX 制造商:NSC 制造商全稱:National Semiconductor 功能描述:2.4V, 10レA, SC70, micro SMD Temperature Sensor
LM20-SO 功能描述:藍牙/802.15.1 模塊 Bluetooth 2.0 trnsvr SO package 3.3V RoHS:否 制造商:Murata Wireless Solutions 類:1 頻帶:2402 MHz to 2480 MHz 靈敏度:- 92 dBm 數據速率: 工作電源電壓:2.2 V to 3.3 V 輸出功率: 接口類型:PCM, UART 天線連接器類型:Chip 最大工作溫度:+ 85 C 尺寸:17.5 mm x 16 mm x 2 mm
LM20X21A 制造商:SHARP 制造商全稱:Sharp Electrionic Components 功能描述:Character Type LCD Module(FA/POS/Measuring instruments)
LM210-A 制造商:Sliger Designs, Inc. 功能描述:FOR THE PROTO CHASSIS - Bulk
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