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Contents
Features .............................................................. 1
Block Diagram ..................................................... 1
Pin Assignment ................................................... 1
Absolute Maximum Ratings ................................. 2
Electrical characteristics ...................................... 2
Definition of Terms .............................................. 3
Load conditions ................................................... 4
Typical performance characteristics .................... 5
Dimensions.......................................................... 7

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Rev.1.1
LOW-VOLTAGE C-MOS
HIGH-PRECISION TEMPERATURE SENSOR IC
S-8120ANP
The S-8120AMP is a ultra-small packaged high-precision temperature
sensor IC that outputs voltage with a temperature coefficient of -
8.5mV/°C and a temperature accuracy of ±2.5°C. A temperature
sensor, a constant current circuit and an operational amplifier are
integrated on a single chip to be able to operate at 2.4V. The operating
temperature ranges from -40°C to +100°C. The S-8120AMP is superior
in linearity over conventional temperature sensors like thermistors. It
can be applied to an ever expanding wide range of applications that
call for high-precision thermal control.
n Features
n Block Diagram
Temperature accuracy : ±2.5°C ( -30°C +100°C)
Linear Output Voltage : -8.5mV/°C
Ta = - 30°C : 1.823 V typ.
Ta = +30°C : 1.326 V typ.
Ta = + 100°C : 0.718 V typ.
Nonlinearity : ±0.5 % typ. ( -20°C +80°C )
Vss standard output
Low voltage operation : Vdd min. = 2.4 V
Low current consumption : Idd typ. = 4.5µA (+25°C)
Ultra-small plastic package ( SC-82AB )
+
Temperature sensor
1 Vdd
4 Vout
3 N.C.
2 Vss
n Pin Assignment
SC-82AB
43
12
( Top view )
1. Vdd
2. Vss
3. N.C.
4. Vout
Seiko Instruments Inc.
1

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S-8120ANP ver.1.1
LOW-VOLTAGE C-MOS HIGH-PRECISION TEMPERATURE SENSOR IC
S-8120ANP
n Absolute Maximum Ratings
Item
Power supply Voltage
(Vss=0.0V)
Output voltage
Operating temperature
Storage temperature
Symbol Ratings
Vdd 6.5
Vout
Topr
Tstg
Vss Vdd
-40 +100
-55 +125
Unit
V
V
°C
°C
n Electrical characteristics
Item
Power supply Voltage
(Vss=0.0V)
Output voltage
Temperature sensitivity
Nonlinearity
Operating temperature
Current consumption
Symbol
Vdd
Condition
Vout
Vse
NL
Topr
Idd
Ta = - 30°C
Ta = + 30°C
Ta = + 100°C
- 30Ta + 100°C
- 20Ta + 80°C
Ta = + 25°C
( 40°CTa+100°C,Vdd=5V)
Min. Typ. Max. Unit
2.4 6.0 V
1.802
1.305
0.697
- 8.78
- 40
1.823
1.326
0.718
- 8.50
±0.5
4.5
1.844
1.347
0.739
- 8.22
+ 100
10.0
V
V
V
mV/°C
%
V
µA
Seiko Instruments Inc.
2

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S-8120ANP ver.1.1
LOW-VOLTAGE C-MOS HIGH-PRECISION TEMPERATURE SENSOR
S-8120ANP
n Definition of terms
1. Output voltage ( Vout )
Output voltage Vout is defined as the voltage
between measured pin-4 and Vss.
Vout is linearly proportional to ambient
temperature.
S-8120AMP is tested for Vout at -30°C,+30°C
and +100°C.
Output voltage Vout
max.
min.
2. Temperature sensitivity ( Vse )
Temperature sensitivity Vse is defined as the
average slope of the Vout versus Ta curve using
the following formula.
Vse = {Vout ( + 100) Vout ( 30)}
130
Vout(+100) : Output voltage at Ta=+100°C
Vout( - 30) : Output voltage at Ta= - 30°C
-30°C
0°C +30°C
Ambient temperature Ta
+100°C
Output voltage Vout
Vout(-30)
slope : Temperature sensitivity
Vout(+100)
3. Nonlinearity NL
Nonlinearity NL is defined as the deviation
of the Vout versus Ta curve from the best-fit
straight line over the device’s rated temperature
range.
a
NL = ~100
b
a : The maximum deviation of the Vout vs.
Ta curve from the best-fit straight line
between - 20°C and +80°C.
b : The difference of the output voltage
between - 20°C and +80°C.
-30°C
0°C +30°
Ambient temperature Ta
+100°C
Output voltage Vout
a
Vout(-20)
Vout vs. Ta curve
ba
Vout(+80)
a
Best-fit
straight line
-20°C 0°C
+80°C
Ambient temperature Ta
Seiko Instruments Inc.
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S-8120ANP ver.1.1
LOW-VOLTAGE C-MOS HIGH-PRECISION TEMPERATURE SENSOR
S-8120ANP
n Load conditions
Load capacitance : CL 100pF
Load resistance : RL 500k
(Note : Do NOT connect a pull-up resistor to Vout pin.)
S-8120ANP
pin-4
Vout
CL100pF
RL500k
CL RL
Seiko Instruments Inc.
4