ICL7136 Intersil Corporation, ICL7136 Datasheet
ICL7136
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ICL7136 Summary of contents
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... A/D converters. Included are seven seg- 2 ment decoders, display drivers, a reference, and a clock. The ICL7136 is designed to interface with a liquid crystal dis- play (LCD) and includes a multiplexed backplane drive; the ICL7137 will directly drive an instrument size, light emitting diode (LED) display. The ICL7136 and ICL7137 bring together a combination of high accuracy, versatility, and true economy ...
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... Absolute Maximum Ratings Supply Voltage ICL7136 15V ICL7137 GND ICL7137 GND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .-9V Analog Input Voltage (Either Input) (Note 1 Reference Input Voltage (Either Input Clock Input ICL7136 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . TEST to V+ ICL7137 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . GND to V+ Operating Conditions Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . . . . .0 CAUTION: Stresses above those listed in “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress only rating and operation of the device at these or any other conditions above those indicated in the operational sections of this specifi ...
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... A (Typ). Typical Applications and Test Circuits FIGURE 1. ICL7136 TEST CIRCUIT AND TYPICAL APPLICATION WITH LCD DISPLAY COMPONENTS SELECTED FOR 200mV FULL SCALE + FIGURE 2. ICL7137 TEST CIRCUIT AND TYPICAL APPLICATION WITH LED DISPLAY COMPONENTS SELECTED FOR 200mV FULL SCALE ...
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... Regulation lost when < 6.8V externally pulled down -)/2, COM the V circuit will turn off. COM • ICL7136 POWER SUPPLY: SINGLE Digital supply is generated internally 4.5V TEST • ICL7136 DISPLAY: LCD Type: Direct drive with digital logic supply amplitude. ...
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... OSC3 39 6 OSC2 40 7 OSC1 ICL7136, ICL7137 FUNCTION Supply Power Supply. Output Driver Pin for Segment “D” of the display units digit. Output Driver Pin for Segment “C” of the display units digit. Output Driver Pin for Segment “B” of the display units digit. ...
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... Detailed Description Analog Section Figure 3 shows the Analog Section for the ICL7136 and ICL7137. Each measurement cycle is divided into four phases. They are (1) auto-zero (A-Z), (2) signal integrate (INT) and (3) de-integrate (DE), (4) zero integrate (ZI). Auto-Zero Phase During auto-zero three things happen. First, input high and low are disconnected from the pins and internally shorted to analog COMMON ...
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... Also the P-P FIGURE 4. USING AN EXTERNAL REFERENCE TEST The TEST pin serves two functions. On the ICL7136 it is coupled to the internally generated digital supply through a 500 resistor. Thus it can be used as the negative supply for externally generated segment drivers such as decimal points or any other presentation the user may want to include on the LCD display ...
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... V+) all segments will be turned on and the display should read “-1888”. The TEST pin will sink about 5mA under these conditions. CAUTION: On the ICL7136, in the lamp test mode, the segments have a constant DC voltage (no square-wave) and may burn the LCD display if left in this mode for several minutes. ...
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... FOR CLARITY OSC 1 System Timing Figure 9 shows the clocking arrangement used in the ICL7136 and ICL7137. Two basic clocking arrangements can be used: 1. Figure 9A, an external oscillator connected to pin 40. 2. Figure 9B, an R-C oscillator using all three pins. The oscillator frequency is divided by four before it clocks the decade counters ...
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... The integrating capacitor should be selected to give the maximum voltage swing that ensures tolerance buildup will not saturate the integrator swing (approximately 0.3V from either supply). In the ICL7136 or the ICL7137, when the analog COMMON is used as a reference, a nominal +2V full- scale integrator swing is fine. For the ICL7137 with +5V supplies and analog COMMON tied to supply ground ...
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... Typical Applications The ICL7136 and ICL7137 may be used in a wide variety of configurations. The circuits which follow show some of the possibilities, and serve to illustrate the exceptional versatility of these A/D converters. The following application notes contain very useful information on understanding and applying this part and are available from Intersil semiconductor ...
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... A-Z 29 1.8M BUFF 28 INT 27 0.047 DISPLAY BP/GND 21 FIGURE 15. ICL7136 AND ICL7137: RECOMMENDED COMPONENT VALUES FOR 2V FULL SCALE ICL7136, ICL7137 SET V REF = 100mV REF REF LO 200k 27k 1.2V (ICL8069) COMMON BP/GND Since low TC zeners have breakdown voltages ~ 6.8V, diode must be placed across the total supply (10V) ...
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... The sensor should then be placed in boiling water and the scale-factor potentiometer adjusted for a 100.0 reading. † Value depends on clock frequency. FIGURE 18. ICL7136 USED AS A DIGITAL CENTIGRADE THERMOMETER OSC 1 40 OSC 2 ...
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... Test is used as a common-mode reference level to ensure compatibility with most op amps. ICL7136, ICL7137 10 F SCALE FACTOR ADJUST (V = 100mV FOR AC TO RMS) REF 220k 470k 1 F 10k 4. 100pF (FOR OPTIMUM - BANDWIDTH) FIGURE 21 CONVERTER WITH ICL7136 14 CA3140 100k 1N914 2. 10k ...
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... POL (20) BP/GND (21) G (22 (23 (24 (25 (26) (27) INT ICL7136, ICL7137 PASSIVATION: Type: PSG Nitride Thickness: 15k WORST CASE CURRENT DENSITY A/cm ICL7136, ICL7137 (13) (12) (11) (10) (9) (8) (7) (6) (28) (29) (30) ...
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... B1 maximum dimensions do not include dambar protrusions. Dambar protrusions shall not exceed 0.010 inch (0.25mm the maximum number of terminal positions. 10. Corner leads (1, N, N/2 and N for E8.3, E16.3, E18.3, E28.3, E42.6 will have a B1 dimension of 0.030 - 0.045 inch (0.76 - 1.14mm). ICL7136, ICL7137 E40.6 40 LEAD DUAL-IN-LINE PLASTIC PACKAGE SYMBOL A ...
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... However, no responsibility is assumed by Intersil or its subsidiaries for its use; nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Intersil or its subsidiaries. For information regarding Intersil Corporation and its products, see web site http://www.intersil.com ICL7136, ICL7137 Q44.10x10 44 LEAD METRIC PLASTIC QUAD FLATPACK PACKAGE ...