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
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
•
•
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 )
n
Block Diagram
1
Vdd
•
•
•
•
•
+
−
4
Vout
3
N.C.
Temperature sensor
2
Vss
n
Pin Assignment
SC-82AB
4
3
1. Vdd
2. Vss
3. N.C.
4. Vout
1
2
( Top view )
Seiko Instruments Inc.
1
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
n
Electrical characteristics
Item
Power supply Voltage
(Vss=0.0V)
Output voltage
Temperature sensitivity
Nonlinearity
Operating temperature
Current consumption
Symbol
Vdd
Condition
Min.
2.4
1.802
1.305
0.697
- 8.78
- 40
( 40°C≤Ta≤+100°C,Vdd=5V)
Typ.
Max.
Unit
6.0
V
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
Symbol
Vdd
Vout
Topr
Tstg
Ratings
6.5
Vss
∼
Vdd
-40
∼
+100
-55
∼
+125
Unit
V
V
°C
°C
Vout
Vse
NL
Topr
Idd
Ta = - 30°C
Ta = + 30°C
Ta = + 100°C
- 30≤ Ta
≤
+ 100°C
- 20≤ Ta
≤
+ 80°C
Ta = + 25°C
Seiko Instruments Inc.
2
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.
-30
°C
0
°C
+30
°C
+100
°C
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
Ambient temperature Ta
Output voltage Vout
Vout(-30)
slope : Temperature sensitivity
Vout(+100) : Output voltage at Ta=+100°C
Vout( - 30) : Output voltage at Ta= - 30°C
Vout(+100)
-30
°C
0
°C
+30
°
+100
°C
Ambient temperature Ta
3. Nonlinearity
NL
a
Output voltage Vout
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.
Vout(-20)
Vout vs. Ta curve
b
a
a
Vout(+80)
Best-fit
straight line
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.
-20°C 0°C
+80°C
Ambient temperature Ta
Seiko Instruments Inc.
3
S-8120ANP ver.1.1
LOW-VOLTAGE C-MOS HIGH-PRECISION TEMPERATURE SENSOR
S-8120ANP
n
Load conditions
Load capacitance : C
L
≤
100pF
Load resistance : R
L
≥
500kΩ
(Note : Do NOT connect a pull-up resistor to Vout pin.)
pin-4
C
L
≤100pF
R
L
≥500kΩ
Vout
C
L
R
L
S-8120ANP
Seiko Instruments Inc.
4
FPGA/CPLD
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