IZ8016 3.5 DIGIT THERMOMETER DESCRIPTION The IZ8016 is a CMOS circuit provided with digital thermometer function. Temperature reading from –50oC to +50oC is detected by use of a thermistor as a sensor and temperature is displayed on a LCD by 0.2oC step. High accuracy is obtained in wide range of –50oC ~ +50oC by providing non-linear correction circuit on the chip. FEATURES FUNCTIONS • Measurement accuracy: ± 1oC • Resolution : 0.2oC (oF) • 31/2 + 7 Indicators, 31/2 duty LCD • Low power consumption • Few external components • Easiness in adjustment • Single 1.5V battery operation • Package Type: Bare chip • Measurable temperature range –49oC ~ +49.8oC -57oF ~ +121.8oF • Suitable Thermistor RT=10KΩ ± 1% (at 25oC) • Sampling Cycle 1 seconds, 3 seconds, 5 seconds, 10 seconds (Default 10 sec) • Oscillation Frequency 32.768 kHz • Temperature adjustment: Adjustment of temperature is made by adjusting fundamental resistance against dispersion in resistance values of thermistors ABSOLUTE MAXIMUM RATINGS Characteristic Supply Voltage (VCC) Operating Temperature Range Storage Temperature Range Symbol VCC Topr Tstg Value - 0.1 ~ + 3.0 - 50 ~ + 50 - 50 ~ + 125 Unit V o C o C ELECTRICAL CHARACTERISTICS (Ta = 25oC, VSS = 0V, VCC = 1.5V unless otherwise specified) Characteristic Operating Voltage LCD Voltage Supply Current Symbo l VCC VDD ICC ISTD Test Condition Operating Standby 1 Min Typ Max Unit 1.20 1.50 3.00 50 5 2.00 V V µA µA 80 10 IZ8016 SERIAL OUTPUT (FROM CPU) PUR BT8016 measure the temperature once FINISH INT (TO CPU) SHCK (FROM CPU) 1 2 3 4 5 6 7 8 9 10 MD Temperature data converted serially by MD, SHCK INT, PUR terminals. Temperature data is output a total 15-bits data. Bit No. 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 Function Polarity Remark Polarity (1= Minus; 0 = Plus) (Hundred digit) (oC no use) 80 40 20 10 8 4 2 1 0.8 0.4 0.2 0.1 o ( C/oF) (0 = oC; 1 = oF) LCD FORMAT A2 B1 A3 F2 B2 F3 A4 B3 F4 B4 CF CF G2 G3 G4 F E2 C1 C2 E3 E4 Dp 9 10 11 12 13 14 15 16 C4/B4 -/CF F/C COM1 C2/B2 8 G4/A4 G2/A2 7 E4/F4 E2/F2 6 D3/Dp 5 C3/B3 4 G3/A3 3 C D4 D4/- 2 C4 E3/F3 1 COM2 D3 D2/BC1 D2 C3 2 11 12 13 14 15 IZ8016 DISPLAY FORMAT APPLICATION CIRCUIT COM & Segments to LCD 24 23 26 25 18 20 19 28 27 22 21 SEG1 SEG2 SEG3 SEG4 SEG5 SEG6 SEG7 SEG8 SEG9 SEG10 SEG11 SEG12 17 29 COM1 SEG13 16 0.1mF SEG14 15 30 VDD VCC (Default C) 32 CF INT to CPU 33 INT Data Output 34 MD Serial Clock Input COM2 14 IZ 8016 31 VSS O Chip size, mm: 2,80 x 2,30 CAP2 13 VCC 12 35 SHCK CAP 11 36 OSC1 OSC2 PUR 2 1 S1 S2 3 4 CAP1 T1 T2 5 6 7 ADJ REF 8 9 THER 10 0.1mF 10K Default: 10 sec VCC (Adjust) 1M TM – Thermistor CN36-2H103FB 3 TM 2nF IZ8016 PAD DIAGRAM 10 9 7 8 6 3 4 5 2 1 36 11 Y 35 12 34 13 (0,0) 33 X 32 PAD DIAGRAM IZ 8016 31 Chip size: 2800 x 2300 Pad size : 100 x 100 Unit : mm 14 15 30 16 29 17 18 21 22 19 20 23 24 25 26 27 28 NOTE: Substrate is connected to VSS PAD ASSIGNMENT Pad No. 1 Signal OSC2 2 3 PUR S1 4 S2 Description Oscillator circuit Pin option, select the thermistor sampling cycle (default 10 seconds) S1 X Y 969 1014 Pad No. 19 20 21 Signa l SEG1 0 SEG9 SEG8 713 314 1014 1014 80 1014 22 X Y LCD segment drive -923 -1016 LCD segment drive LCD segment drive -763 -434 -1016 -1016 SEG7 LCD segment drive -269 -1016 -148 -318 -517 -714 1014 1014 1014 1014 23 24 25 26 SEG6 SEG5 SEG4 SEG3 LCD segment drive LCD segment drive LCD segment drive LCD segment drive 59 224 552 718 -1016 -1016 -1016 -1016 -876 1014 27 SEG2 LCD segment drive 1046 -1016 -1244 1014 28 SEG1 LCD segment drive 1229 -1016 LCD common drive 1261 -723 LCD supply voltage GND o C/oF Terminal, default (VSS) select oC Signal to interrupt the MPU Serial Data Serial shift Clock Input 1261 1261 1261 -295 -127 40 1261 218 1261 1261 431 606 Oscillator circuit 1261 772 5 6 7 8 CAP1 T1 T2 ADJ 9 REF 10 THER 11 CAP 12 13 14 VCC CAP2 COM2 SAMPLING CYCLE, sec VSS VSS 10 VSS VCC 1 VCC VSS 2 VCC VCC 5 Booster capacitor Test input Test input Adjust the fixed temperature (active high) Terminal for temperature detection Terminal for temperature detection Terminal for temperature detection Supply voltage Booster capacitor LCD common drive 15 SEG14 LCD segment drive -1266 -383 33 INT 16 17 SEG13 SEG12 LCD segment drive LCD segment drive -1266 -1266 -646 -808 34 35 18 SEG11 LCD segment drive -1266 -1016 36 MD SHC K OSC1 Description S2 -1266 685 29 -1266 -1266 -1266 525 223 -213 30 31 32 COM 1 VDD VSS CF 4