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Número de pieza | S-58LM20A | |
Descripción | CMOS TEMPERATURE SENSOR IC | |
Fabricantes | Seiko Instruments | |
Logotipo | ||
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No Preview Available ! S-58LM20A Series
www.sii-ic.com
© Seiko Instruments Inc., 2007-2015
CMOS TEMPERATURE SENSOR IC
Rev.3.1_00
The S-58LM20A Series is a high-accuracy temperature sensor IC on a single chip, provides output voltage which is linear
against the temperature change.
Each chip consists of a temperature sensor, a constant current circuit, and an operational amplifier.
The operating ambient temperature is from –55°C to 130°C. This IC has much better linearity than other conventional
temperature sensors such as thermistor, it is possible to achieve the extensive application for temperature control.
Features
• Accuracy against temperature
• Linear output voltage
• Nonlinearity
• Operation in wide range of power supply voltage
• Low current consumption
• Built-in operational amplifier
• Output voltage referred to VSS
• Lead-free, Sn 100%, halogen-free*1
±2.5°C (−55°C to +130°C)
−11.77 mV/°C Typ.
Ta = −30°C: 2.205 V Typ.
Ta = +30°C: 1.515 V Typ.
Ta = +130°C: 0.303 V Typ.
±0.4% Typ. (−20 to +80°C)
VDD = 2.4 to 5.5 V (−30°C to +130°C)
VDD = 2.7 to 5.5 V (−55°C to +130°C)
4.5 μA Typ. (+25°C) 6.0 μA Max. (−55°C to +130°C)
*1. Refer to “ Product Name Structure” for details.
Applications
• Compensation of high-frequency circuits such as cellular phones and radio equipment
• Compensation of oscillation frequency in crystal oscillator
• LCD contrast compensation
• Compensation of amplifier gain
• Compensation of auto focus circuits
• Temperature detection in battery management
• Overheating prevention for charged batteries or halogen lights
Package
• SC-82AB
• SNT-4A
• WLP-4B
Seiko Instruments Inc.
1
1 page Rev.3.1_00
Pin Configuration
SC-82AB
Top view
43
12
Figure 2
SNT-4A
Top view
14
23
Figure 3
WLP-4B
Top view
Figure 4
WLP-4B
Bottom view
12
43
Figure 5
CMOS TEMPERATURE SENSOR IC
S-58LM20A Series
Table 2
Pin No.
Pin Name
Description
1
VDD
Power supply pin
2
VSS
GND pin
3
NC*1
No connection
4
VOUT
Output voltage pin
*1. The NC pin is electrically open.
The NC pin can be connected to VDD or VSS.
Table 3
Pin No.
Pin Name
Description
1
VSS
GND pin
2
VDD
Power supply pin
3
VOUT
Output voltage pin
4
NC*1
No connection
*1. The NC pin is electrically open.
The NC pin can be connected to VDD or VSS.
Table 4
Pin No.
Pin Name
1 VDD
2 VSS*1
3 VSS*1
4 VOUT
*1. Connect both VSS pins to GND.
Description
Power supply pin
GND pin
GND pin
Output voltage pin
Seiko Instruments Inc.
5
5 Page Rev.3.1_00
CMOS TEMPERATURE SENSOR IC
S-58LM20A Series
3. Nonlinearity (ΔNL)
ΔNL is the nonlinearity of output voltage. Its deviation with the approximation line is shown below.
ΔNL is calculated from the following formula.
∆NL
=
a*1
b*2
× 100
Output voltage
a
b
VOUT (when −20°C)
(B) Actual measured
value
a
VOUT (when +80°C)
a (A) Approximation
line
−20°C 0°C
+80°C
Temperature [Ta]
*1. The maximum deviation of the actual measurement of output voltage (B) and an approximation line (A) in
temperature −20°C to +80°C. The approximation line is the one to be drawn so that “a” should be the minimum
value.
*2. The difference of the actual measured value of output voltage when −20°C and +80°C.
Figure 10
4. Line regulation (ΔVOUT1)
ΔVOUT1 indicates the dependency of output voltage against input voltage. This indicates how much the output voltage
varies when changing the input voltage after fixing the output current constant.
5. Load regulation (ΔVOUT2)
ΔVOUT2 indicates the dependency of output voltage against output current. This indicates how much the output voltage
varies when changing output current after fixing the input voltage constant.
6. Current consumption – Power supply voltage (ΔIDD1)
ΔIDD1 indicates the dependency of current consumption against power supply voltage. This indicates how much current
consumption varies when changing the temperature after fixing an output current constant.
7. Current consumption - Temperature (ΔIDD2)
ΔIDD2 indicates the dependency of current consumption against temperature. This indicates how much current
consumption varies when changing the temperature after fixing an output current constant.
Seiko Instruments Inc.
11
11 Page |
Páginas | Total 28 Páginas | |
PDF Descargar | [ Datasheet S-58LM20A.PDF ] |
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