link to page 7 link to page 7 ICL7660S, ICL7660A Functional Block DiagramV+8Q1OSCILLATORVOLTAGEOSCAND DIVIDE-BY-LEVELCAP+7TRANSLATOR2 COUNTER2Q2GNDLV36CAP-Q44INTERNAL SUPPLYREGULATORVOUT5Q33SUBSTRATELOGIC3NETWORK3Typical Performance Curves See Figure 12 on page 7, “ICL7660S Test Circuit”) and Figure 13 on page 7 “ICL7660A Test Circuit” 12250) ΩTA = +125°C10(200)CE(V8ANETA = +25°CGSUPPLY VOLTAGE RANGE150LTA(NO DIODE REQUIRED)6RESISTOTA = -55°CV LY1004URCEPPOSU250OUTPUT S00-55-2502550100125024681012TEMPERATURE (°C)SUPPLY VOLTAGE (V)FIGURE 1. OPERATING VOLTAGE AS AFIGURE 2. OUTPUT SOURCE RESISTANCE AS AFUNCTION OF TEMPERATUREFUNCTION OF SUPPLY VOLTAGE35098) Ω(%)96300V+ = 5V94TA = +25°C250IOUT = 1mATANCE (92ISIOUT = 3mA,200IOUT = 20mA,V+ = 2V90V+ = 5V88150IOUT = 20mA,V+ = 5V86100CONVERSION EFFICIENCY84R E5082OUTPUT SOURCE RESIOUT = 20mA,V+ = 12VPOW080-50-2502550751001251001k10k50kTEMPERATURE (°C)OSC FREQUENCY fOSC (Hz)FIGURE 3. OUTPUT SOURCE RESISTANCE AS AFIGURE 4. POWER CONVERSION EFFICIENCY AS AFUNCTION OF TEMPERATUREFUNCTION OF OSCILLATOR FREQUENCY FN3179 Rev 7.01 Page 5 of 14 Feb 10, 2020