ICL7136CDL - 3.5-Digit LCD A/D Converter | Analog Devices
MPN: ICL7136CDL ✓ פעילICL7136CDL סקירה
An integrated A/D converter is a mixed-signal IC that converts an analog input voltage into a digital numeric value. The ICL7136 belongs to the ADC/DAC category, combines data conversion with display-interface functions, and is used where a compact measurement system must present a value directly on an LCD. Unlike a discrete measurement design, it integrates the conversion, reference, clock, decoding, and display-driving blocks into one device.
The converter provides 3.5-digit resolution, low-power operation, seven-segment display decoding, LCD segment drivers, a multiplexed LCD backplane output, an internal voltage reference, and an integrated clock. Overrange recovery is an improvement over the earlier ICL7126. The available product listing identifies the ICL7136CDL specifically as a 40-CERDIP device, making it suitable for established through-hole industrial, laboratory, and instrumentation designs.
Internally, the device combines successive-approximation conversion techniques with the supporting analog and digital blocks needed for autonomous panel measurement. The integrated reference reduces the number of precision external components, while the high-impedance input helps preserve the accuracy of the signal under test. The segment decoders and LCD drivers reduce display-interface complexity compared with a general-purpose converter followed by a separate display controller.
Typical applications include digital panel meters, laboratory measurement instruments, temperature measurement systems, process-monitoring equipment, weighing indicators, and portable diagnostic instruments. In each case, the converter can drive the LCD directly while the external analog front end determines the measured quantity. The LCD architecture also suits handheld or bench instruments where a numerical display is more practical than a host-controlled graphical interface.
Designers should verify the complete electrical limits, reference accuracy, conversion timing, input ranges, and display compatibility against the manufacturer datasheet before release. PCB layout must preserve the pinout of the 40-pin CERDIP footprint, provide adequate bypass capacitance, and keep sensitive analog-input routing away from display-driver and clock signals. External component values and timing requirements should not be inferred from generic ADC designs.
This page combines verified manufacturer and distributor information, structured specifications, application guidance, sourcing questions, and explicitly recorded data gaps. It does not present unsupported electrical values as facts; unavailable parameters remain clearly identified in the specification table for engineering review.
חלופות תחליף ישיר עבור ICL7136CDL — אותו מארז, תואם פין-לפין. חלקים במארז שונה הדורשים עיבוד מחדש של ה-PCB אינם נכללים.
וריאנטים בסדרה זו
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בקשת חלופותICL7136CDL דירוגים מרביים ומאפיינים חשמליים
| Product Type | 3.5-digit LCD analog-to-digital converter |
| רזולוציה | 3.5 digits |
| Conversion Architecture | Successive-approximation A/D conversion |
| Display Output | Multiplexed liquid-crystal display output |
| Integrated Segment Decoders | 7-segment decoders |
| Integrated Display Drivers | LCD segment and backplane drivers |
| Internal Reference | Integrated voltage reference |
| Internal Clock | Integrated clock circuit |
| Input Impedance | Very high input impedance |
| Power Class | Low-power operation |
| Overrange Behavior | Overrange recovery |
| מארז | 40-pin CERDIP |
| סוג הרכבה | Through-hole |
| Manufacturer Designation | Harris Corporation |
| Production Status | Production |
מדריך תצורת פינים של ICL7136CDL 40-pin cerdip
תצורת פינים עבור ICL7136CDL (מארזת 40-pin cerdip). רכיב אנלוגי זה כולל פיני כניסה, יציאה ואספקת מתח. יש לעיין בגיליון הנתונים של היצרן לתצורות פיני איפוס היסט, פיצוי והפעלה. אידיאלי למעגלי עיצוב אותות ומגברים.
אין נתוני פריסת פינים מפורטים עבור ICL7136CDL.
עיינו ב- גיליון נתונים עבור תצורת פינים מלאה.
יישומים טיפוסיים
ICL7136CDL מתאים עבור 6 יישוםs: Digital Panel Meter, Laboratory Measurement Instrument, Temperature Measurement System, Process Monitoring Equipment, Weighing Scale Indicator, Portable Diagnostic Instrument.
Digital Panel Meter
The ICL7136CDL fits a standalone digital panel meter because its 3.5-digit conversion result can be decoded and displayed directly on a liquid-crystal panel. Integrating the voltage reference, clock, seven-segment decoders, and display drivers reduces the number of separate control components required in a conventional meter design. Its very high input impedance helps preserve the output of the selected sensor or divider. The 40-CERDIP package also suits through-hole meter platforms with sufficient board area. Before layout release, engineers should verify the official 40-pin connection list, the supported display glass, external passive values, reference configuration, and timing requirements against the ICL7136 datasheet.
מומלץ
Laboratory Measurement Instrument
The ICL7136CDL is appropriate for a bench measurement instrument that must convert a slowly changing analog signal and show the result on a numeric LCD. Its 3.5-digit resolution suits compact digital meters, while the integrated clock and voltage reference simplify the converter subsystem. Very high input impedance is valuable when the source resistance could otherwise create measurement error. For laboratory use, the instrument designer must still calibrate offsets and gain, assess the verified reference accuracy, and follow the manufacturer’s bypass and reference-layout guidance. The LCD interface should be checked against the chosen display’s segment and backplane arrangement.
מומלץ
Temperature Measurement System
The ICL7136CDL can form the display and conversion portion of a temperature measurement system when paired with a suitable sensor and signal-conditioning front end. The converter’s very high input impedance is valuable for high-impedance sensor sources, while the integrated LCD interface removes the need for a separate display controller. The 3.5-digit result can communicate a temperature directly without a host processor. Accuracy is determined mainly by the sensor, reference path, analog front end, and calibration procedure rather than display resolution alone. Validate sensor excitation, linearity, self-heating, and the verified input range for the selected operating environment before production.
מומלץ
Process Monitoring Equipment
The ICL7136CDL is well suited to a process-monitoring instrument that presents a measured process value on a local LCD. Its low-power architecture, integrated reference, integrated clock, and direct display drive reduce system complexity compared with a converter and separate display interface. The 40-pin CERDIP package is practical for established industrial through-hole control boards. Designers should separate sensitive analog inputs from display and clock traces, provide the required bypass capacitance, and validate the completed assembly across its intended supply and temperature range. Any externally sourced sensor signal should also be checked for noise, grounding, and overrange behavior.
מומלץ
Weighing Scale Indicator
The ICL7136CDL can serve as the numeric readout and conversion engine in a low-rate weighing indicator. A load-cell amplifier provides the analog signal, while the ICL7136 converts it and drives the liquid-crystal display without a separate display controller. The integrated seven-segment decoding and LCD drivers simplify the display subsystem, and the very high input impedance helps avoid unnecessary loading of the front end. Practical scale designs still require careful excitation, grounding, filtering, calibration, and stability analysis. The verified input range, reference behavior, conversion timing, and 40-pin pinout must be confirmed before this architecture is applied to a new scale design.
מומלץ
Portable Diagnostic Instrument
The ICL7136CDL supports portable diagnostic instruments that need a direct numeric LCD readout without a continuously active display controller. Low-power operation and integrated clock, reference, decoding, and display circuitry can simplify the power and layout budgets of a battery-powered or compact instrument. The 40-CERDIP package is larger than modern surface-mount options, so mechanical space must be assessed before adoption. Engineers should verify actual power consumption, startup behavior, display legibility, and reference stability using official data. A robust design should also include input protection and a defined recovery method for signals that exceed the converter’s permitted range.
מומלץ
סיכום מוצרים מומלצים
נתוני עזר הנדסיים עבור ICL7136CDL — השוואה, הנחיות תכנון ומידע על תאימות.
מדריך בחירה
הערות תכנון
Verify the 40-pin CERDIP pinout against the official ICL7136 datasheet before routing the PCB. Keep the analog input and reference paths compact, and place their associated bypass components directly at the relevant device pins. Route LCD segment and backplane connections away from sensitive measurement nodes to reduce coupling from display-drive transitions into the conversion result.
Follow the manufacturer’s recommended bypass-capacitor values and placement without substituting generic values. Confirm the converter’s verified supply range, supply-current behavior, and reference configuration for the intended measurement. Because the ICL7136CDL includes its own clock and voltage reference, unnecessary external support components should be added only when explicitly required by the datasheet or reference architecture.
Do not treat the statement that ICL7136 can replace an ICL7106 as proof of a pin-for-pin PCB substitution. A functional replacement may require passive-value changes and must be checked for input range, display timing, segment mapping, reference behavior, and package pin functions. Also confirm that the selected LCD and its glass pinout agree with the converter’s multiplexed backplane-drive arrangement.
Use a single, well-defined analog ground strategy and prevent display-return currents from sharing sensitive input and reference paths. Keep switching or high-current external circuitry away from the converter’s analog section, and provide local return paths for bypass currents. At the board level, separate the measurement front end from LCD drivers and clock circuitry to preserve effective input impedance and minimize measurement error.
מידע על תאימות
The supplied manufacturer and distributor results do not state RoHS, REACH, lead-free, halogen-free, or conflict-minerals status for ICL7136CDL. AEC-Q100 is marked not applicable because this is an analog-to-digital converter rather than an automotive-qualified device specified in the supplied data.
