ICL7116CPL+ - 3.5-Digit LCD ADC with Display Hold | Analog Devices
MPN: ICL7116CPL+ ✓ ActiveICL7116CPL+ Overview
An integrating ADC converts an unknown analog voltage into a time-based digital result. In the ICL7116 family, the dual-slope architecture supports high input impedance, good rejection of periodic interference, and direct multiplexing of LCD segment outputs. The display-hold feature distinguishes the ICL7116 from related ICL7106 devices by allowing a measurement to be frozen while the display remains visible.
The principal functional characteristics visible in the verified product data are 3.5-digit resolution, direct LCD display drive, display hold, very high input impedance, differential and single-ended operation, and a 0 V input reference. These characteristics make the converter appropriate for panel meters, laboratory instruments, process monitoring, and industrial measurement systems where an operator must view a stable numerical reading.
The ICL7116 uses a dual-slope measurement technique rather than a successive-approximation architecture. Dual-slope integration averages the input over a controlled interval, helping reject periodic interference and reducing sensitivity to short-duration disturbances. The Hold pin can freeze the displayed result, while the integrated display-driver outputs reduce the need for separate digital-to-analog conversion or display multiplexing hardware.
Typical uses include digital panel meters, temperature-controller front panels, laboratory counters, process-monitoring equipment, weighing systems, and portable instruments. A design using the ICL7116CPL+ should preserve its high-impedance analog input path, provide the external components and display arrangement required by the manufacturer datasheet, and account for the stated 0°C to 70°C operating-temperature range.
The principal design trade-off is integration time versus measurement responsiveness. Integrating conversion improves rejection of interference but does not provide the rapid sampling of a high-speed successive-approximation converter. The Hold function is valuable when intermittent readings need to remain visible for observation or copying without changing the underlying converter architecture.
This page combines verified manufacturer and distributor information with practical selection guidance, commercial pricing references, package details, and a clear explanation of the ICL7116CPL+ display-hold function. It also distinguishes verified replacements from merely similar converter functions so engineers can avoid assuming that an LCD driver, LED driver, or different conversion architecture is pin-to-pin compatible.
Drop-in alternatives for ICL7116CPL+ — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
No drop-in alternatives available for this product.
Request AlternativesICL7116CPL+ Maximum Ratings & Electrical Characteristics
| ADC Type | 3.5-digit monolithic integrating ADC |
| Conversion Architecture | Dual-slope |
| Display Output | Direct LCD drive |
| Display Hold Function | Yes |
| Input Type | Differential and single-ended |
| Input Reference | 0 V |
| Input Impedance | Very high; exact value not provided |
| Resolution | 3.5 digits |
| Package | 40-pin PDIP |
| Package Dimensions | 0.600 in (15.24 mm) pitch |
| Mounting Type | Through-hole |
| Operating Temperature | 0°C to 70°C |
| Interface Type | Parallel display-driver output |
| Analog Input Topology | True differential input, according to comparison source |
| Manufacturer List Price | $10.23 starting price |
| LCSC Listed Price | $4.5436 |
| Heisener Listed Unit Price | $16.3542 |
| RoHS Status | Compliant |
| Supply | Production |
ICL7116CPL+ 0.600 in (15.24 mm) pitch Pin Configuration Guide
Pin configuration for ICL7116CPL+ (0.600 in (15.24 mm) pitch package). This analog component features input, output, and power supply pins. Refer to the manufacturer datasheet for offset null, compensation, and enable pin configurations. Ideal for signal conditioning and amplifier circuits.
No detailed pinout data available for ICL7116CPL+.
Refer to the datasheet for full pin configuration.
Typical Applications
ICL7116CPL+ is suitable for 6 applications: Digital Panel Meters, Laboratory Measurement Instruments, Process and Industrial Monitoring, Temperature Controller Front Panels, Portable Handheld Meters, Weighing and Counting Systems.
Digital Panel Meters
The ICL7116CPL+ fits digital panel meters because it combines a 3.5-digit integrating ADC with direct LCD drive in one 40-pin PDIP device. The verified dual-slope architecture automatically rejects interference common in industrial environments, while the very high input impedance helps preserve signals from resistive or high-impedance sensing elements. Its Hold pin can freeze the current measurement while an operator copies or compares the value. The converter produces a display-oriented result directly, reducing the need for a separate display-multiplexing circuit. Designers should follow the manufacturer datasheet for the LCD segment arrangement, reference network, input protection, and external timing components.
Laboratory Measurement Instruments
The ICL7116CPL+ is useful in laboratory instruments that present stable numerical readings rather than high-speed waveforms. Its 3.5-digit resolution, very high input impedance, and integrating dual-slope operation support repeatable measurements from suitable sensors, while direct LCD output reduces the display-control burden on the instrument. The Hold function is especially valuable during calibration or data-entry workflows because the operator can preserve a reading without losing visual context. The verified 0°C to 70°C operating range covers many room-temperature laboratory products, but the designer must verify supply voltage, input range, reference accuracy, and component tolerances from the official datasheet.
Process and Industrial Monitoring
The ICL7116CPL+ can serve in process-monitoring equipment where a local numerical display is more valuable than a high-rate digital data stream. Its dual-slope conversion technique automatically rejects interference common in industrial environments, and the high input impedance can minimize loading of the measured source. The 40-pin PDIP format also supports straightforward through-hole assembly and serviceable instrument construction. Because the verified operating range is 0°C to 70°C, additional environmental qualification may be necessary for harsh installations. Input protection, grounding, reference stability, and display contrast must be evaluated against the application rather than inferred from the distributor summary.
Temperature Controller Front Panels
The ICL7116CPL+ is appropriate for the local display section of a temperature controller or process instrument when the measured value must remain visible to an operator. A 3.5-digit LCD is suitable for many panel-meter formats, and the direct LCD-drive capability can simplify the display architecture. The Hold pin allows a captured value to remain on screen while control settings or alarms are inspected. This is not a high-speed control-loop ADC, so it should not replace a dedicated control-loop converter; instead, it can complement a controller by providing a local measurement display. Sensor excitation, signal conditioning, reference accuracy, and isolation must be designed separately.
Portable Handheld Meters
The ICL7116CPL+ can support portable handheld instruments that prioritize a readable LCD, low measurement-system complexity, and stable readings over rapid sampling. Its direct LCD drive and 3.5-digit integration reduce the number of display-interface components, while the Hold function helps during field measurements. The verified 0°C to 70°C range is suitable for many indoor environments but may constrain outdoor or extended-temperature products. Because no verified supply-voltage range or power-consumption figure was supplied, battery and regulator design cannot be finalized from this record alone. The complete datasheet should be checked for current consumption, startup behavior, and analog settling requirements.
Weighing and Counting Systems
The ICL7116CPL+ is a candidate for basic weighing, counting, and batch-display systems that require an integrated analog measurement and LCD readout. Its integrating conversion provides inherent rejection of periodic interference, and the high input impedance can be advantageous when the source is a bridge or front-end network with high output impedance. The Hold function allows the displayed quantity or mass to remain fixed during inspection. However, the verified data does not state excitation requirements, conversion time, or input-range limits, so a weighing-system designer must verify those parameters before selecting the converter. Load-cell conditioning and calibration remain separate analog design tasks.
Engineering reference data for ICL7116CPL+ — comparison, design guidance, and compliance information.
Selection Guide
Key Differentiators
- Integrated display-hold control (vs ICL7106CPL+)
- Direct LCD display-drive architecture (vs ICL7117CPL+)
- 3.5-digit integrating conversion with high input impedance (vs ICL7109CPL+)
Design Notes
Do not treat the ICL7106 or ICL7117 as automatic substitutes for the ICL7116CPL+. The verified family information confirms that the ICL7116 adds a Hold function relative to the ICL7106, while the ICL7117 uses LED rather than LCD drive. Before considering either related part, compare every one of the 40 package pins, the display-driver topology, reference arrangement, conversion timing, and supply requirements against the official datasheets.
Keep the high-impedance analog input route short and shield it from display outputs and other switching nodes. Although the verified ICL7116 characteristics identify very high input impedance, the actual allowable source impedance and common-mode range are not present in the supplied excerpts. Confirm those limits in the manufacturer datasheet before sizing the input resistor, guard structures, sensor wiring, and any input protection components.
Use a stable, low-noise supply and reference arrangement appropriate to the conversion scheme, but do not infer the allowed supply voltage from the verified 0 V input-reference condition. The supply range, power consumption, and bypass-component recommendations were not included in the supplied data. Review the official ICL7116/ICL7117 datasheet before selecting regulators, capacitors, or power-rail sequencing for the instrument.
The Hold function changes when the displayed result is updated, not the fundamental accuracy of the analog measurement. Define whether a held value should freeze only the display or also interact with downstream control logic, and account for the converter's integration interval when validating reading latency. Because the supplied excerpts do not state conversion time, use the manufacturer timing data rather than assuming an instantaneous display update.
Compliance Information
The Lisleapex distributor result identifies ICL7116CPL+ as RoHS-certified. No verified REACH, AEC-Q100, halogen-free, lead-free, or conflict-minerals declaration was included in the supplied data.