ICL7117CPL+ - 3.5-Digit Dual-Slope ADC | Maxim Integrated
Référence : ICL7117CPL+ ✗ Fin de vieICL7117CPL+ Présentation
An integrating ADC such as the ICL7117CPL+ converts an analog input voltage into a digital result through repeated integration and reference measurement. This dual-slope method is well suited to meters and panel instruments because it provides high input impedance, rejects periodic interference, and can use simple passive input networks. The ICL7117 family adds a Hold pin to the ICL7106 and ICL7107 function, allowing a measured value to remain displayed for examination or transfer to another system.
The ICL7117CPL+ integrates a 3.5-digit A/D converter, seven-segment LED display drivers, an internal reference, and a clock. Those functions reduce the number of external components required for a standalone display instrument. The Hold function is particularly useful when an operator must freeze a reading during calibration, inspection, or process monitoring without interrupting the ongoing measurement.
The dual-slope conversion method supports rejection of interference at the conversion frequency. Its high input impedance also reduces loading of the sensing circuit, which is important when the input originates from bridges, thermocouples, or other relatively high-impedance sources. The exact conversion timing, input limits, resolution detail, reference voltage, and operating-temperature limits must be selected from the manufacturer data sheet when defining a production design.
Typical uses include digital panel meters, laboratory instrumentation, process monitoring, temperature measurement, laboratory scales, and general-purpose industrial measurement panels. The integrated LED drivers make the ICL7117CPL+ particularly appropriate for displays built from conventional seven-segment LED digits rather than multiplexed glass LCDs. An ICL7116CPL+ is the corresponding LCD-oriented family member, while the ICL7117CPL+ supports LED display systems.
Designers should preserve the recommended input and reference network, bypass placement, and display-driver layout described by Maxim Integrated. Because this is a through-hole PDIP device in a 40-pin package, PCB allocation must reserve the full footprint and adequate insertion clearance. Power, ground, reference, analog input, timing, and display-driver connections should be assigned directly from the package pin-description table and datasheet application example.
This page combines the device architecture, display-function selection, practical layout guidance, package information, and same-footprint replacement analysis. It is intended to help engineers determine whether the ICL7117CPL+ provides the required LED display drive and Hold behavior without adding a separate ADC, display driver, clock, and reference to a measurement instrument.
Alternatives de remplacement direct pour ICL7117CPL+ — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
ICL7117CPL
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
ICL7117CJL
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
TC7117CPL
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
ICL7117CPL+ Valeurs maximales et caractéristiques électriques
| Converter Type | Dual-slope integrating A/D converter |
| Résolution | 3.5 digits |
| Input Channel Count | 1 channel |
| Display Output | Direct seven-segment LED display drive |
| Integrated Functions | A/D converter, seven-segment decoders, display drivers, voltage reference, and clock |
| Hold Function | Yes, display Hold input |
| Input Impedance | Very high input impedance |
| Package Type | 40-pin PDIP |
| Nombre de broches | 40 pins |
| Type de montage | Through-hole |
| Temperature Grade | Commercial grade |
Guide de configuration des broches du ICL7117CPL+ 40-pin pdip
Configuration des broches du ICL7117CPL+ (boîtier 40-pin pdip). Ce composant analogique comporte des broches d'entrée, de sortie et d'alimentation. Consultez la fiche technique du fabricant pour les configurations des broches d'annulation d'offset, de compensation et d'activation. Idéal pour le conditionnement de signaux et les circuits amplificateurs.
Aucune donnée de brochage détaillée disponible pour ICL7117CPL+.
Consultez la fiche technique pour la configuration complète des broches.
Applications typiques
ICL7117CPL+ convient pour 6 applications: Digital LED Panel Meters, Temperature Measurement Instruments, Laboratory Measurement Instruments, Industrial Process Monitoring, Bench Scales and Counters, Service and Calibration Equipment.
Digital LED Panel Meters
The ICL7117CPL+ fits compact digital panel meters because it combines a 3.5-digit dual-slope A/D converter with direct seven-segment LED display drive. The internal reference, clock, and display drivers reduce the number of separate ICs required for a measurement instrument. Its very high input impedance also helps preserve accuracy when the measured source has high output impedance. The Hold function allows an operator to freeze a displayed value for inspection or recording without redesigning the measurement path.
Recommandé
Temperature Measurement Instruments
The ICL7117CPL+ is suitable for temperature measurement panels that convert a conditioned sensor voltage into a readable decimal value. Its 3.5-digit resolution supports practical thermometer displays, while the integrating dual-slope architecture provides very high input impedance and helps reject periodic interference. The integrated seven-segment LED drivers, internal reference, and clock simplify a handheld or panel instrument. A Hold input can freeze the reading during a comparison or calibration procedure.
Recommandé
Laboratory Measurement Instruments
The ICL7117CPL+ supports laboratory instruments that need a stable numerical display from a high-impedance analog source. Its 3.5-digit dual-slope converter is intended for precision measurement rather than high-speed waveform acquisition, making it appropriate for resistance, voltage, and process-variable displays. Direct LED drive reduces the display subsystem to conventional seven-segment digits, and the Hold input lets a technician preserve a reading during adjustment or comparison.
Recommandé
Industrial Process Monitoring
The ICL7117CPL+ can form the measurement display section of an industrial process-monitoring panel. The converter's high input impedance reduces disturbance to sensor circuits, and its dual-slope method favors rejection of interference at the conversion frequency. A 3.5-digit readout, direct LED display drive, internal reference, and Hold function are useful for local indication of pressure, level, temperature, or slow process variables. Choose it when simple local measurement is more important than rapid sampling.
Recommandé
Bench Scales and Counters
The ICL7117CPL+ is applicable to bench scales and counters that require a conventional decimal display and moderate measurement speed. The 3.5-digit result format provides a practical indication for laboratory weighing, counting, or resistance measurement, while integrated LED drivers reduce component count. Its Hold function is valuable when an operator needs to inspect a stable value before transferring it to another instrument or recording it manually.
Recommandé
Service and Calibration Equipment
The ICL7117CPL+ works well in service equipment where a technician must compare a measured value with a setpoint. The Hold input can freeze the current reading, while the 3.5-digit LED display presents the result in an instrument-style format. Very high input impedance helps maintain accuracy when connected to high-impedance test probes or conditioning circuits. Since this is a 40-pin through-hole device, maintain adequate PCB clearance and follow the recommended reference and bypass layout.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour ICL7117CPL+ — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | ICL7117CPL | ICL7117CJL | TC7117CPL |
|---|---|---|---|---|
| Package | 40-pin PDIP | 40-pin PDIP | 40-pin PDIP | 40-pin PDIP |
| Brand | Maxim Integrated | Maxim Integrated | Maxim Integrated | Texas Instruments |
| Resolution | 3.5 digits | 3.5 digits | 3.5 digits | 3.5 digits |
| Mounting Type | Through-hole | Through-hole | Through-hole | Through-hole |
Principaux différenciateurs
- Direct seven-segment LED display integration (vs ICL7116CPL+)
- Display Hold function for measurement capture (vs ICL7107-family devices)
- Integrated measurement and display functions (vs Discrete ADC and display-driver implementation)
Notes de conception
Reserve the complete 40-pin PDIP footprint and provide adequate component clearance around the device. Follow the Maxim ICL7116/ICL7117 datasheet application diagram for analog input, reference, bypass, timing, and LED-driver routing. Keep sensitive analog nodes away from display-current paths, and route the seven-segment outputs directly toward the display to minimize coupling into the measurement input.
Place the input and reference bypass components close to their associated device pins and minimize loop area around sensitive analog connections. The dual-slope converter has very high input impedance, but long PCB traces can still admit interference that affects displayed readings. Keep display-driver current paths separate from the reference and input nodes, and verify ground continuity between the converter and its external network.
Do not assume that ICL7117CPL+ and ICL7116CPL+ are interchangeable because the resolution and dual-slope function match. The ICL7117 targets direct LED drive, while the ICL7116 targets multiplexed LCD displays with backplane drive. Confirm every numbered pin, display topology, reference voltage, input range, and timing connection before using either ordering variant in an existing PCB design.
Informations de conformité
No specific RoHS, REACH, lead-free, halogen-free, or conflict-minerals status is stated for the ICL7117CPL+ in the manufacturer product page or datasheet excerpts.