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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
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JA31106
Pad Assignment
Note: The IC substrate should be connect to VSS
Pad Coordinates
Pad No. Pad Name 1 S1 2 S2 3 S3 4 S4 5 S5 6 S6 7 S7 8 S8 9 S9 10 S10 11 S11 12 S12 13 S13 14 VCC 15 CAP1 16 CAP2 17 CLFH 18 LOWC 19 VSS X( m) 80 80 80 80 80 80 80 80 80 80 190 300 410 520 630 740 850 960 1070 Y( m) 1105.3 977.65 867.65 757.65 647.65 537.65 427.65 317.65 207.65 80 80 80 80 80 80 80 80 80 80 Pad No. Pad Name X( m) Y( m) 20 SC 1180 80 21 RF 1180 314.82 22 RS 1180 424.82 23 VDD 1180 534.82 24 PSW 1180 644.82 25 TEST 1180 754.82 26 BZSEL 1180 864.82 27 STSEL1 1180 974.82 28 STSEL2 1180 1105.3 29 ML 1070 1105.3 30 FEVEL 960 1105.3 31 OSCI 850 1105.3 32 OSCO 740 1105.3 33 BZ1 630 1105.3 34 BZ2 520 1105.3 35 COM1 410 1105.3 36 COM2 300 1105.3 37 COM3 190 1105.3 Chip size = 1400 m * 1300 m(X*Y)
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JA31106
Pad Description
Pad No. 1 ~ 13 14 15 16 17 18 19 20 21 22 23 24 25 26 Pad Name S1 ~ S13 VCC CAP1 CAP2 CLFH LOWC VSS SC RF RS VDD PSW TEST BZSEL I/O O O O O I I/O -- I/O O O -- I I I Function LCD segment driver Generated 3V voltage For positive voltage pumping, NMOS open drain output For positive voltage pumping, inverter output Selection of C or F CLFH= Open or VDD: C CLFH= VSS: F For the supply voltage detector ; output? Negative power supply Common point, NMOS open drain Connect to reference resistor, PMOS open drain Connect to sensor resistor, PMOS open drain Positive power supply Power ON/OFF input, toggle active For the test of production. TEST=Open or VDD: LCD display the highest value TEST=VSS: LCD display the real time value Buzzer output frequency selection BZSEL=Open or VDD: 8kHz BZSEL=VSS: 6kHz 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 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. Fever function option FEVEL=Open or VDD: With fever function FEVEL=VSS: Without fever function For system oscillator input For system oscillator output Buzzer output 1 Buzzer output 2 LCD common driver
27 28
STSEL1 STSEL2
I
29
ML
I
30 31 32 33 34 35 ~ 37
FEVEL OSCI OSCO BZ1 BZ2 COM1 ~ COM3
I I O O O O
Absolute Maximum Ratings
Supply voltage.......................... 0V to 2.0V Input voltage............. VSS-0.5V 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.
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JA31106
Electrical Characteristics
Symbol VDD IDD ISTB fOSC RC RF Parameter Test Conditions Conditions VDD No Load OSC OFF ROSC=1M VDD=1.3V ~1.5V VDD=1.3V ~1.5V Min. 1.3 Typ. 1.5 20 32 Max. 1.65 50 1.0 38.4 0.1 0.2 Unit V A A KHz C F Operating Voltage Operating Current 1.5V Standby Current 1.5V Oscillation Frequency 1.5V Temperature Measurement Accuracy at Range 35C ~ 39C Temperature Measurement Accuracy at Range 95F ~ 102F
25.6 - 0.1 - 0.2
LCD Electrode Pattern -
Name S1 S2 S3 S4 S5 S6 S7 S8 S9 S10 S11 S12 COM1 COM1 F1 A1 B1 F2 A2 B2 F3 A3 B3 COM2 COM2 E1 G1 C1 E2 G2 C2 E3 G3 C3 COM3 COM3 H1 D1 D2 H2 H4 D3 I4 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.
S13 A5 B5 C5
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 --7-4 Ver. 1.1
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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 It will automatically power off after measurement is stable and the system is still on more than 8 min 40sec(Fsys=32kHz) 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. 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 VSS VDD / or open 8 sec VDD/or open VSS 16 VDD/or open VDD/or open sec 32 VSS VSS sec
j. k. l.
7-5
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JA31106
Flow Chart
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JA31106
Application Circuit
JA31106
Note: REF=30.01k C* = 272~302 C** = 103~104 RBAT =300k~330k for 1.35V 0.05V.
7-7
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