CMOS TEMPERATURE SENSOR IC

S-58LM20A Series

Seiko Instruments Inc.

1

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.

This IC is able to be used under the wide temperature range of –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

±2.5°C (−55 to +130°C)

• Linear output voltage

−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.

• Nonlinearity

±0.4% Typ. (−20 to +80°C)

• Operation in wide range of power supply voltage

= 2.4 to 5.5 V (−30 to +130°C)

= 2.7 to 5.5 V (−55 to +130°C)

• Low current consumption

4.5

µA Typ. (+25°C) 6.0 µA Max. (−55 to +130°C)

• Built-in operational amplifier

• Small package

SNT-4A, SC-82AB, WLP-4B

• Lead-free product

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

Drawing Code

Package Name

Package

Tape

Reel

Land

SC-82AB

NP004-A

NP004-A

NP004-A



SNT-4A

PF004-A

PF004-A

PF004-A

PF004-A

WLP-4B

HB004-B

HB004-B

HB004-B

