JA31106
One-Decimal Clinical Thermometer
Features
Single-chip CMOS construction
Measurement range: 32.0 ~42.9C (90F ~
109.9F)
Measurement accuracy: 0.1C(0.2F)
Resolution: 0.1C (0.1F)
Single 1.5V battery operation
Highest temperature hold
Round off function
Multi stable time selection: 4s/8s/16s/32s
Automatic power off
One ON/OFF switch input key
Bonding option for C and F
Display the last time measured temperature
Alarm warning for fever
Buzzer output: 6k/8kHz
For various sensor application, change one
layer only
General Description
The JA31106 is CMOS digital clinical thermometer
IC for measuring body temperature from 32.0C ~
42.9C (90F ~ 109.9F). It also provides stable
alarm, fever alarm, automatic power off and the
memory function of the last time measured
temperature. The chip provides multi stable time for
various of thermister also. The other electronic
components are LCD display, thermister, 1.5V
battery, ON/OFF switch, buzzer, resistors and
capacitors.
Block Diagram
7-1 Ver. 1.1
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JA31106
Pad Assignment
Note: The IC substrate should be connect to VSS
Pad Coordinates
Pad No. Pad Name
X( m)
Y( m)
Pad No. Pad Name
X( m)
Y( m)
1
S1
80
1105.3
20
SC
1180
80
2
S2
80
977.65
21
RF
1180
314.82
3
S3
80
867.65
22
RS
1180
424.82
4
S4
80
757.65
23
VDD
1180
534.82
5
S5
80
647.65
24
PSW
1180
644.82
6
S6
80
537.65
25
TEST
1180
754.82
7
S7
80
427.65
26
BZSEL
1180
864.82
8
S8
80
317.65
27
STSEL1
1180
974.82
9
S9
80
207.65
28
STSEL2
1180
1105.3
10
S10
80
80
29
ML
1070
1105.3
11
S11
190
80
30
FEVEL
960
1105.3
12
S12
300
80
31
OSCI
850
1105.3
13
S13
410
80
32
OSCO
740
1105.3
14
VCC
520
80
33
BZ1
630
1105.3
15
CAP1
630
80
34
BZ2
520
1105.3
16
CAP2
740
80
35
COM1
410
1105.3
17
CLFH
850
80
36
COM2
300
1105.3
18
LOWC
960
80
37
COM3
190
1105.3
19
VSS
1070
80
Chip size = 1400 m * 1300 m(X*Y)
7-2 Ver. 1.1
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JA31106
Pad Description
Pad No. Pad Name
I/O
Function
1 ~ 13
S1 ~ S13
O LCD segment driver
14
VCC
O Generated 3V voltage
15
CAP1
O For positive voltage pumping, NMOS open drain output
16
CAP2
O For positive voltage pumping, inverter output
17
CLFH
I
Selection of C or F
CLFH= Open or VDD: C
CLFH= VSS: F
18
LOWC
I/O For the supply voltage detector ; output?
19
VSS
-- Negative power supply
20
SC
I/O Common point, NMOS open drain
21
RF
O Connect to reference resistor, PMOS open drain
22
RS
O Connect to sensor resistor, PMOS open drain
23
VDD
-- Positive power supply
24
PSW
I
Power ON/OFF input, toggle active
25
TEST
I
For the test of production.
TEST=Open or VDD: LCD display the highest value
TEST=VSS: LCD display the real time value
26
BZSEL
I
Buzzer output frequency selection
BZSEL=Open or VDD: 8kHz
BZSEL=VSS: 6kHz
27
28
STSEL1
STSEL2
I
Stable time selection (STSEL1, STSEL2 is bonding option)
ST
STSEL1
STSEL2
4 sec
VSS
VDD or Open
8 sec
VDD or Open
VSS
16 sec
VDD or Open
VDD or Open
32 sec
VSS
VSS
29
ML
I
Memory function option
ML=Open or VDD: Without memory function
ML=VSS: With memory function. The last measurement value
will be displayed after power on.
30
FEVEL
I
Fever function option
FEVEL=Open or VDD: With fever function
FEVEL=VSS: Without fever function
31
OSCI
I
For system oscillator input
32
OSCO
O For system oscillator output
33
BZ1
O Buzzer output 1
34
BZ2
O Buzzer output 2
35 ~ 37
COM1 ~
COM3
O LCD common driver
Absolute Maximum Ratings
Supply voltage.......................... 0V to 2.0V
Input voltage............. VSS0.5V to VDD+0.5V
Operation Temperature......... 20C to +75C
Storage Temperature.......... 55C to +125C
*Note: Stress above those listed under "Absolute Maximum Ratings" may cause permanent damage to the
device. These are stress ratings only. Functional operation of this device at these or any other conditions
above those indicated in the operational sections of this
specification is not implied and exposure to absolute maximum rating conditions for extended periods may
affect device reliability.
7-3 Ver. 1.1
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JA31106
7-4 Ver. 1.1
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Electrical Characteristics
Test Conditions
Symbol
Parameter
V
DD
Conditions
Min.
Typ.
Max.
Unit
V
DD
Operating Voltage
1.3
1.5
1.65
V
I
DD
Operating Current
1.5V
No Load
20
50
A
I
STB
Standby Current
1.5V
OSC OFF
1.0
A
f
OSC
Oscillation Frequency
1.5V ROSC=1M
25.6
32
38.4
KHz
RC
Temperature Measurement
Accuracy at Range 35C ~
39C
VDD=1.3V
~1.5V
0.1
0.1
C
RF
Temperature Measurement
Accuracy at Range 95F ~
102F
VDD=1.3V
~1.5V
0.2
0.2
F
LCD Electrode Pattern
Name
S1 S2 S3 S4 S5 S6 S7 S8 S9 S10 S11 S12 S13
COM1 COM1
F1 A1 B1 F2 A2 B2 F3 A3 B3
A5
COM2
COM2
E1 G1 C1 E2 G2 C2 E3 G3 C3
B5
COM3
COM3 H1 D1
D2 H2 H4 D3
I4
C5
Note: The LCD uses 3V and 1/3 duty, 1/2 bias
For one-digital decimal: COM1, COM2, COM3, S1, S2, S3, S4, S5, S6, S7, S8, S9, S13.
Functional Description
Power SW: push PSW switch to power on or power off.
When power on: push the switch, a "BI" sound for 0.125sec will be generated.
a. The LCD firstly all segments are on about 2sec.
b. After a. LCD shows the last-time temperature about 2sec. (If the memory function is optioned)
c. After b., LCD shows the self-test temperature (37.00.1 ) about 1 sec. The
or
mark will flash at
the speed of 1Hz.
d. After c., LCD shows the higher measured temperature always, the
( ) mark will flash at the speed of
1Hz.
e. If the temperature < 32.0 (or 90.0 ), the display show Lo
(or Lo
).
f.
If the temperature
43.0 (or 109.9 ), The display show Hi
(or Hi
).
g. The LCD always show the higher temperature during the temperature measurement.
h. After power on, the measurement time is over 16 sec and the measured temperature does not change
within the stable time, the measurement will be over and the
( ) mark flash stop.
i. For JA31106, when measurement is over and if the temperature
37.8 (100 ). In this case the
buzzer alarms "BI-BI-BI--- BI-BI-BI---" for 10 sec, as follows:
BI --- BI --- BI ---------- BI ---
JA31106
BI: 0.125sec
---: 0.125sec
-----------: 0.375sec
if the temperature < 37.80 (100 ), the buzzer alarms "BI-BI-BI-BI-" for 10 sec, as follows:
BI --- BI---
BI: 0.5sec
---: 0.5sec
j.
It will automatically power off after measurement is stable and the system is still on more than 8 min
40sec(Fsys=32kHz)
k. When measurement is over and the beep sound is terminated, if the temperature rises within 8 min 40
sec, the measurement will start again, but the
mark will not flash and the buzzer will not output also.
l.
During bi sound is on 10 sec, the temperature is not measurement.
When power off: the stand-by current
1A.
The frequency of buzzer is 6k(VSS) or 8kHz (Open or VDD) by pin option.
Measurement to 0.1 degree at C.
Sensor use 503ET.
Reference resistor is the value sensor in 37.0 C.
The low battery and "M" flag can not display when the temperature show Hi or Lo.
When battery voltage is low, the battery mark " " flashes at the speed of 1Hz and the measurement
maybe not accurate. The low TEST pin connect to Vss, the measured
temperature will be the actual temperature of voltage detect: 1.35V 0.05V.
During the process of mass production, in order to adjust the reference resistance (RF), let the measured
environment. The LCD can be up or down changed, not always show the higher one.
There are 4 kinds of stable time to be selected; 4 sec, 8 sec, 16 sec and 32 sec.
Time
STSEL1
STSEL2
4 sec
V
SS
V
DD
/ or open
8 sec V
DD
/or open
V
SS
16
sec
V
DD
/or open V
DD
/or open
32
sec
V
SS
V
SS
7-5 Ver. 1.1
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JA31106
Flow Chart
7-6 Ver. 1.1
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JA31106
Application Circuit
JA31106
Note:
REF=30.01k
C* = 272~302
C** = 103~104
R
BAT
=300k~330k for
1.35V 0.05V.
7-7 Ver. 1.1
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