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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°C2.205 V Typ.
Ta = +30°C1.515 V Typ.
Ta = +130°C0.303 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.
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CMOS TEMPERATURE SENSOR IC
S-58LM20A Series
Block Diagram
VDD
VSS
Temperature sensor
Figure 1
Rev.3.1_00
VOUT
2 Seiko Instruments Inc.

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Rev.3.1_00
CMOS TEMPERATURE SENSOR IC
S-58LM20A Series
Product Name Structure
Users can select the product type in the S-58LM20A Series. Refer to “1. Product name” regarding the contents of product
name, “2. Package” regarding the package drawings and “3. Product name list” regarding the product type.
1. Product name
(1) SC-82AB package
S-58LM20A - N4T1 x
Environmental code
U: Lead-free (Sn 100%), halogen-free
G: Lead-free (for details, please contact our sales office)
Package name (abbreviation) and packing specifications*1
N4T1 : SC-82AB, Tape
Product name
*1. Refer to the tape drawing.
(2) SNT-4A package
S-58LM20A - I4T1 U
Environmental code
U: Lead-free (Sn 100%), halogen-free
Package name (abbreviation) and packing specifications*1
I4T1 : SNT-4A, Tape
Product name
*1. Refer to the tape drawing.
(3) WLP-4B package
S-58LM20A - H4T1 S
Environmental code
S: Lead-free, halogen-free
Package name (abbreviation) and packing specifications*1
H4T1 : WLP-4B, Tape
Product name
*1. Refer to the tape drawing.
Seiko Instruments Inc.
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CMOS TEMPERATURE SENSOR IC
S-58LM20A Series
2. Package
Rev.3.1_00
Package Name
SC-82AB
SNT-4A
WLP-4B
Package
NP004-A-P-SD
PF004-A-P-SD
HB004-C-P-SD
Drawing Code
Tape
Reel
NP004-A-C-SD
NP004-A-R-SD
PF004-A-C-SD
PF004-A-R-SD
HB004-C-C-SD
HB004-C-R-SD
Land
PF004-A-L-SD
3. Product name list
Table 1
Product Name
Temperature Accuracy
Package
S-58LM20A-N4T1x
±2.5°C
SC-82AB
S-58LM20A-I4T1U
±2.5°C
SNT-4A
S-58LM20A-H4T1S
±2.5°C
WLP-4B
Remark 1. x: G or U
2. Please select products of environmental code = U for Sn 100%, halogen-free products.
4 Seiko Instruments Inc.

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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