CMOS Temperature Sensor
Series
635
9
The XC31B series are ultra small CMOS temperature sensor ICs.
As a bandgap type temperature sensor is built-into the XC31B,
linearity, in comparison to thermistor type temperature sensors, is
much better.
The operating temperature range of the series is from -30C to
+80C.The XC31B comes in a mini molded SOT-25 package with a
quiescent current of only 7
A(2.0V) and as such, is suitable for use
with various portable devices.
Output voltage is selectable in 0.1V steps within a range of 2.0V to
6.0V (at 25C).
General Description
Operating Voltage Range
: 3.0V ~ 10.0V
Output Voltage Range
: 2.0V ~ 6.0V
Output Voltage Accuracy
: 3%
Detectable Temperature Range
: -30C ~ +80C
Output Voltage Temp. Coefficient : TYP -3900ppm/C
Low Power Consumption
: 7
A (2.0V)
GMobile phones
GPortable AV equipment
GPalm top computers, PDA
GBattery powered equipment
Features
Applications
NLow Power Consumption : 7A
NOperating Voltage Range : 3.0V ~ 10.0V
NOutput Voltage Temp. Coefficient
: TYP -3900ppm/C
NSOT-25 Package
Pin Configuration
Pin Assignment
PIN NUMBER
1
2
3
PIN NAME
FUNCTION
NC
V
SS
CE
No Connection
Ground
Chip Enable
4
5
V
OUT
V
IN
Output
Power Supply
SOT-25
(TOP VIEW)
1
2
3
5
4
NC
V
SS
CE
V
IN
V
OUT
09S_01XC31B 02.9.12 3:38 PM 635
Packaging Information
GSOT-25
XC31B
Series
636
9
Product Classification
GOrdering Information
DESIGNATOR
DESCRIPTION
Polarity of Output Voltage
P: + (Positive)
a
Temperature Coefficient
N: (Negative)
b
Output Voltage (25
C)
20 = 2.0V
30 = 3.0V
c
Revision Character
A
d
DESCRIPTION
Package Type
M=SOT25
e
Device Orientation
R = Embossed Tape
(Standard Feed)
L = Embossed Tape
(Reverse Feed)
f
DESIGNATOR
0.4
0.95
1.90.2
2.90.2
+0.1
-0.05
1.10.1
00.1
0.15
0.2min
+0.1
-0.05
2.80.2
1.6
+0.2
-0.1
09S_01XC31B 02.9.12 3:38 PM 636
XC31B
Series
637
9
Marking
qBased on internal standards
wRepresents the integer of the Output Voltage
SYMBOL
VOLTAGE (V)
2
2.e
3
3.e
4
4.e
5
5.e
6
6.e
eRepresents the decimal number point of the Output Voltage
rRepresents the assembly lot no.
SOT-25
(TOP VIEW)
qwer
SYMBOL
VOLTAGE (V)
0
w.0
1
w.1
2
w.2
3
w.3
4
w.4
5
w.5
6
w.6
7
w.7
8
w.8
9
w.9
Block Diagram
Bandgap
Temperature Sensor
V
IN
CE
V
OUT
V
SS
+
-
Absolute Maximum Ratings
PARAMETER
Input Voltage
SYMBOL
RATINGS
UNIT
20
Output Voltage
CE Pin Voltage
Output Current
Power Dissipation
Storage Temperature
V
IN
V
OUT
V
CE
I
OUT
P
d
Tstg
-0.3 12
-0.3 12
-0.3 V
IN
+0.3
150
-40 +125
mA
mW
Ta = 25
C, V
SS
= 0V
Operating Ambient Temperature
Topr
-40 +85
09S_01XC31B 02.9.12 3:38 PM 637
XC31B
Series
638
9
Electrical Characteristics
Directions for use
GNotes on Use
-30
+80
V
IN
V
OUT
T
D3)
T
SE
T
L4)
V
OUT
I
SS
1
-
2.0
-3900
-7.8
1
2.0
7
I
SS
2
I
OUT
=100
A
2)
, V
IN
=4.0V, Ta=25
I
OUT
=100
A, V
IN
=4.0V
-30
Ta80
-30
Ta80
-30
Ta80
V
IN
=4.0V
1
AIOUT100A
V
IN
=V
CE
=4.0V, Ta=25
V
IN
=4.0V, V
CE
=V
SS
, Ta=25
V
CEH
V
CEL
V
V
ppm/
mV/
%
mV
A
A
V
V
10
2.06
-4400
-8.8
3.5
17
0.1
0.3
1.94
-3400
-6.8
1.5
XC31BPN20A V
OUT
(T)
1)
=2.0V
Input Voltage
Output Voltage
Detectable Temperature Range
Output Voltage
Temperature Coefficient
Temperature Sensitivity
Liniarity Margin Error
Load Stability
Supply Current 1
Supply Current 2
CE "High" Level Voltage
CE "Low" Level Voltage
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
-30
+80
V
IN
V
OUT
T
D3)
T
SE
T
L4)
V
OUT
I
SS
1
-
2.0
-3900
-15.6
1
3.0
8
I
SS
2
I
OUT
=100
A
2)
, V
IN
=6.0V,Ta=25
I
OUT
=100
A, V
IN
=6.0V
-30
Ta80
-30
Ta80
-30
Ta80
V
IN
=6.0V
1
AIOUT100A
V
IN
=V
CE
=6.0V, Ta=25
V
IN
=6.0V, V
CE
=V
SS
, Ta=25
V
CEH
V
CEL
V
V
ppm/
mV/
%
mV
A
A
V
V
10
4.12
-4400
-17.6
3.5
18
0.1
0.3
3.88
-3400
-13.6
1.5
XC31BPN40A V
OUT
(T)
1)
=4.0V
Input Voltage
Output Voltage
Detectable Temperature Range
Output Voltage
Temperature Coefficient
Temperature Sensitivity
Liniarity Margin Error
Load Stability
Supply Current 1
Supply Current 2
CE "High" Level Voltage
CE "Low" Level Voltage
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
1. When the load capacitance CL is too large, oscillation may occur on the output signal.
2. Output signal overshoot will occur when the power (V
IN
) is switched on or when the power drastically flucturates. The chip enable (CE)
function is effective for helping to avoid overshoot and also in saving consumption current.
Note:
1) V
OUT
(T)=Specified Output Voltage at 25C.
2) Should output current exceed 100
A, output voltage drop will increase.
If this IC is to be used in applications where such currents are required, please use a buffer on the output.
3) Output voltage temperature coefficient T
D
is defined as
T
D
V
OUT
TaV
OUT
4) Liniarity margin error is calculated as follows,
T
L
e
max
Tse
Ta
where e
max
= maximum error.
The maximum error is the maximum difference between the actual measured value and the value on an approximated straight line.
09S_01XC31B 02.9.12 3:38 PM 638
XC31B
Series
639
9
Typical Performance Characteristics
(1) OUTPUT VOLTAGE vs. AMBIENT TEMPERATURE
(2) SUPPLY CURRENT vs. AMBIENT TEMPERATURE
(3) OUTPUT VOLTAGE vs. INPUT VOLTAGE
XC31BPN20A2.0V
XC31BPN40A4.0V
2.8
3.2
3.6
4.0
4.4
4.8
5.2
1.5
1.7
1.9
2.2
2.3
2.5
-40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90
-40 -30 -20 -10 0 10 20 30 40 50 60 70 80 90
Output Voltage:V
OUT
(V)
Output Voltage:V
OUT
(V)
Temp.: Ta ()
Temp.: Ta ()
I
OUT
=100A,V
IN
=4.0V
I
OUT
=100A,V
IN
=6.0V
XC31BPN20A2.0V
XC31BPN40A4.0V
0
2
4
6
8
10
0
4
2
6
8
10
12
Supply Current: I
SS
1 (A)
Supply Current: I
SS
1 (A)
-40 -30 -20 -10 0
10 20 30 40 50 60 70 80 90
-40 -30 -20 -10
0
10 20 30 40 50 60 70 80 90
Temp.: Ta ()
Temp.: Ta ()
V
IN
=4.0V
V
IN
=6.0V
1.4
1.6
1.8
2.0
2.2
2.4
1.0
2.0
3.0
4.0
5.0
6.0
XC31BPN20A2.0V
3.4
3.6
3.8
4.0
4.2
4.4
3.0
4.0
5.0
6.0
7.0
8.0
XC31BPN40A4.0V
Output Voltage: V
OUT
(V)
Output Voltage: V
OUT
(V)
Input Voltage: V
IN
(V)
Input Voltage: V
IN
(V)
I
OUT
=100A, Topr=25
I
OUT
=100A, Topr=25
09S_01XC31B 02.9.12 3:38 PM 639
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