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ICL7117C/D Datasheet(PDF) 1 Page - Maxim Integrated Products |
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ICL7117C/D Datasheet(HTML) 1 Page - Maxim Integrated Products |
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1 / 8 page  General Description The Maxim ICL7116 and ICL7117 are 3½ digit monolithic analog-to-digital converters. They differ from the Maxim ICL7106 and ICL7107 in that the ICL7116 and ICL7117 have a Hold pin, which makes it possible to hold or “freeze” a reading. These integrating ADCs have very high input impedances and directly drive LCD (ICL7116) and LED (ICL7117) displays. Versatility and accuracy are inherent features of these converters. The dual-slope conversion technique auto- matically rejects interference signals common in industrial environments. The true differential input is particularly useful when making ratiometric measurements (ohms or bridge transducers). Maxim has added a zero-integrator phase to the ICL7116 and ICL7117, eliminating overrange hangover and hysteresis effects. Finally, these devices offer high accuracy by lowering rollover error to less than one count and zero reading drift to less than 1µV/ºC. Applications These devices can be used in a wide range of digital panel meter applications. Most applications, however, involve the measurement and display of analog data: Features ● Improved 2nd Source! ● Hold Pin Allows Indefinite Display Hold ● Guaranteed First Reading Recovery from Overrange ● On-Board Display Drive Capability—No External Circuitry Required: LCD (ICL7116), LED (ICL7117) ● High-Impedance CMOS Differential Inputs ● Low Noise (< 15µVP-P) Without Hysteresis or Overrange Hangover ● Clock and Reference On-Chip ● Zero Input Gives Zero Reading ● True Polarity Indication for Precision Null Applications Ordering Information appears at end of data sheet. ● Pressure ● Voltage ● Resistance ● Temperature ● Conductance ● Current ● Speed ● Material Thickness ANALOG INPUT ICL7116 + - LCD DISPLAY VREF CLOSED = HOLD OPEN = RUN 9V TO ANALOG COMMON PIN [PIN 32] TOP VIEW C1 B1 TEST 1 2 40 39 HOLD D1 OSC2 OSC3 OSC1 PDIP 3 4 38 37 G1 E1 C-REF 5 6 36 35 A1 F1 V+ C+REF REF HI 7 8 34 33 D2 COMMON 9 32 C2 ON HI 10 31 B2 ON LO 11 30 A2 F2 E2 A/Z BUFF INT 12 29 13 28 14 D3 15 B3 16 F3 17 E3 AB4 POL V- G2 C3 A3 G3 BP/GND 18 19 20 27 26 25 24 23 22 21 ICL7116 ICL7117 Detailed Circuit Diagram - see Figure 1 Pin Configurations continued at end of data sheet ICL7116/ICL7117 3½ Digit ADCs with Display Hold 19-0949; Rev 2; 1/17 Typical Operating Circuit Pin Configurations EVALUATION KIT AVAILABLE |
Similar Part No. - ICL7117C/D |
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Similar Description - ICL7117C/D |
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