ICL7129 Intersil, ICL7129 Datasheet
ICL7129
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ICL7129 Summary of contents
Page 1
... The ICL7129 instantly checks E40.6 for continuity, giving both a visual indication and a logic level Q44.10x10 output which can enable an external audible transducer. These features and the high performance of the ICL7129 make it an extremely versatile and accurate instrument-on-a-chip. 40 OSC2 39 ...
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... Typical Application Schematic + 9V - ICL7129 LOW BATTERY CONTINUITY BACKPLANE SEGMENT DRIVES LATCH, DECODE DISPLAY MULTIPLEXER UP/DOWN RESULTS COUNTER SEQUENCE COUNTER/DECODER CONTROL LOGIC ANALOG SECTION CONT V+ V- DGND OR DP LOW BATTERY CONTINUITY ICL7129 560pF 1.2k + 0.1 F 20K 1.0 F 0.1 F 150k 10k 100k - + V IN 3-32 DRIVES ANNUNCIATOR DRIVE V DISP ...
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... Pin 22 Sink Current NOTE: 3. Device functionality is guaranteed at the stated Min/Max limits. However, accuracy can degrade under these conditions. ICL7129 Thermal Information Thermal Resistance (Typical, Note 2) PDIP Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ...
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... HI, the last displayed reading is held. When pulled LO, the result counter contents incrementing during the de-integrate phase of cycle. OUTPUT: Negative going edge occurs when the data latches are updated. Can be used for converter status signal. ICL7129 PIN SYMBOL INT IN 26 ...
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... Detailed Description The ICL7129 is a uniquely designed single chip A/D converter. It features a new “successive integration” technique to achieve 10 V resolution on a 200mV full-scale range. To achieve this resolution a 10:1 improvement in noise performance over previous monolithic CMOS A/D converters was accomplished. Previous integrating converters used an external capacitor to store an offset correction voltage ...
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... BATTERY” annunciator. 24 I/O Ports V+ 3.2V Four pins of the ICL7129 can be used as either inputs or out- puts. The specific pin numbers and functions are described 28 COMMON in the Pin Description table. If the output function of the pin is 5V not desired in an application it can easily be overridden by connecting the pin to V+ (HI) or DGND (LO) ...
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... FIGURE 8. TRIPLEXED LIQUID CRYSTAL DISPLAY LAYOUT FOR ICL7129 ICL7129 Since the CONTINUITY output is one of the four “weak out- puts” of the ICL7129, the “continuity” annunciator on the dis- play can be driven by an external source if desired. The continuity function can be overridden with a pull-down resistor connected between CONTINUITY pin and DGND (pin 36). Display Confi ...
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... In order to reduce the effects of stray capacitance value is recommended. Clock Oscillator The ICL7129 achieves its digital range changing by integrat- ing the input signal for 1000 clock pulses (2,000 oscillator cycles) on the 2V scale and 10,000 clock pulses on the 200mV scale. To achieve complete rejection of 60Hz on both scales, an oscillator frequency of 120kHz is required, giving two conversions per second ...
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... ICL7129. When a battery voltage between 3.8V and 6V is desired for operation, a voltage doubling circuit should be used to bring the voltage on the ICL7129 level within the power sup- ply voltage range. This operating mode is shown in Figure 14. CRYSTAL MODE: ...
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... The diagram in the Typical Application Schematic and Figure 15 show the ICL8069 1.2V band-gap voltage source used as the reference for the ICL7129, and the COMMON output as its pre-regulator. The reference voltage for the ICL7129 is set to 1.000V for both 2V and 200mV full-scale operation. Multiple Integration A/D Converter Equations ...
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... For information regarding Intersil Corporation and its products, see web site http://www.intersil.com Sales Office Headquarters NORTH AMERICA Intersil Corporation P. O. Box 883, Mail Stop 53-204 Melbourne, FL 32902 TEL: (407) 724-7000 FAX: (407) 724-7240 ICL7129 EUROPE Intersil SA Mercure Center 100, Rue de la Fusee 1130 Brussels, Belgium TEL: (32) 2.724.2111 FAX: (32) 2.724.22.05 ...