Contents
Features.............................................................. 1
Block Diagram..................................................... 1
Pin Assignment ................................................... 1
Dimensions ......................................................... 2
Absolute Maximum Ratings................................. 2
Electrical characteristics...................................... 2
Definition of Terms.............................................. 3
Load conditions ................................................... 4
Typical performance characteristics .................... 5
Frequently Asked Questions ............................... 7
S-8110AMP rev.1.01
Seiko Instruments Inc.
1
LOW VOLTAGE C-MOS TEMPERATURE SENSOR IC S-8110AMP
The S-8110AMP is a high-precision temperature sensor IC that outputs
voltage with a temperature coefficient of -8.5mV/
°
C, and is able to
operate at 2.4V.
A temperature sensor, a constant current circuit and an operational
amplifier are integrated on a single chip. The operating temperature
ranges from -40
°
C to +100
°
C. The S-8110AMP 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.
Features
Block Diagram
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 to +80
°
C )
Vss standard output
Low voltage operation : Vdd min. = 2.4 V
Low current consumption : Idd typ. = 4.5
µ
A ( +25
°
C)
Small plastic package ( SOT23-3 )
Pin Assignment
SOT 23 - 3
2
3
1
1. Vss
2. Vout
3. Vdd
( Top view )
Temperature sensor
+
-
V ,udd
3
V ,uout
2
V,uss
1
S-8110AMP rev.1.01
Seiko Instruments Inc.
2
LOW VOLTAGE C-MOS TEMPERATURE SENSOR IC
S-8110AMP
Dimensions
SOT23-3
2
3
1
0.25
1.5
2.8
+0.2
-0.6
2.9(3.1 max.)
0.4
±
0.1
0.16
+0.1
-0.06
0.95
±
0.1
0.95
±
0.1
1
±
0.1
0.0 min.
1.3 max.
1.9
±
0.2
Unit : mm
Absolute Maximum Ratings
Item
Symbol
Ratings
Unit
Power supply
voltage(Vss=0.0V)
Vdd
6.5
V
Output voltage
Vout
Vss to Vdd
V
Operating temperature
Topr
-40 to +100
°
C
Storage temperature
Tstg
-55 to +125
°
C
Electrical characteristics
( -40
°
C
Ta
+100
°
C Vdd=5V)
Item
Symbol
Condition
Min.
Typ.
Max.
Unit
Power supply
voltage(Vss=0.0V)
Vdd
2.4
6.0
V
a = - 30
°
C
1.779
1.823
1.863
V
Output voltage
Vout
Ta = + 30
°
C
1.272
1.326
1.356
V
Ta = + 100
°
C
0.665
0.718
0.749
V
Temperature sensitivity
Vse
- 30
Ta
+ 100
°
C
- 8.84
- 8.50
- 8.18
mV/
°
C
Nonlinearity
NL
- 20
Ta
+ 80
°
C
±
0.5
%
Operating temperature
Topr
- 40
+ 100
V
Current consumption
Idd
Ta = + 25
°
C
4.5
10.0
µ
A
S-8110AMP rev.1.01
Seiko Instruments Inc.
3
LOW VOLTAGE C-MOS TEMPERATURE SENSOR IC
S-8110AMP
Definition of terms
1. Output voltage ( Vout )
Output voltage Vout is defined as the voltage
between measured pin-2 and Gnd.
Vout is linearly proportional to ambient
temperature.
S-8110AMP is tested for Vout at -30
°
C,+30
°
C
and +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.
130
{
Vout (
+
100) - Vout (-30)
}
Vse =
Vout (+100) : Output voltage at Ta=+100
°
C
Vout ( - 30) : Output voltage at Ta= - 30
°
C
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 .
b
a
NL=
×
100
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.
Output voltage Vout
max.
min.
+
100
°
C
+
30
°
C
0
°
C
-30
°
C
Ambient temperature Ta
Vout(-30)
Vout(+100)
0
°
C
+100
°
C
+30
°
C
slope : Temperature sensitivity
-30
°
C
Output voltage Vout
Ambient temperature Ta
Output voltage Vout
Ambient temperature Ta
a
Vout(-20)
b
a
a
Vout(+80)
0
°
C
+80
°
C
Vout vs. Ta curve
Best-fit
straight line
-20
°
C
S-8110AMP rev.1.01
Seiko Instruments Inc.
4
LOW VOLTAGE C-MOS TEMPERATURE SENSOR IC
S-8110AMP
Load conditions
Load capacitance : C
L
100p F
Load resistance
: R
L
500k
(Note : Do NOT connect a pull-up resistor to Vout pin.)
S-8110AMP
V
out
R
L
C
L
C
L
100
p
F
R
L
500
k
pin-2
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