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Analog Devices Inc./Maxim Integrated ICL7109CPL+2
- Part No.:
- ICL7109CPL+2
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 40-DIP (0.600", 15.24mm)
- Datasheet:
-
ICL7109CPL+2.pdf
- Description:
- IC ADC 12BIT DUAL SLOPE 40DIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,168
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Product details
Overview
ICL7109CPL+2 from Maxim Integrated is a 12-bit dual-slope analog-to-digital converter (ADC) with built-in display drivers, housed in a 28-pin PDIP package, featuring ±1 LSB integral nonlinearity, 10 µV/°C offset drift, and 0.005% typical linearity - used in precision digital panel meters and benchtop test equipment.
For engineers reviewing the ICL7109CPL+2 datasheet, ICL7109CPL+2 pinout, ICL7109CPL+2 application, or ICL7109CPL+2 equivalent, key selection criteria include dual-slope integration time control, on-chip reference voltage stability, segment driver current capability, and compatibility with 7-segment LED displays in low-noise industrial measurement systems.
Technical Context
The ICL7109CPL+2 implements a dual-slope conversion architecture with automatic zero and reference calibration cycles, supporting integration times of 100 ms or 120 ms for 50 Hz or 60 Hz line rejection. It includes internal clock generation and a 4.096 V bandgap reference with ±0.01% initial accuracy.
Its output interface provides multiplexed BCD data and segment/digit strobes directly to 7-segment LED displays without external latches or decoders. The device operates from a single +5 V supply with ±5 V analog input range and supports differential input configuration.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit effective - delivers 1 part in 4096 measurement resolution for high-accuracy DC voltage monitoring. |
| Integral Nonlinearity | ±1 LSB max - ensures monotonic transfer function critical for error-free digitization in metrology-grade instruments. |
| Reference Voltage | 4.096 V internal bandgap - enables direct 1 mV/LSB scaling with 0–4.095 V input range for intuitive BCD readout. |
| Offset Drift | 10 µV/°C - maintains calibration stability across ambient temperature shifts in unregulated lab environments. |
| Supply Voltage | +5 V only - simplifies power design by eliminating need for dual-rail supplies or external regulators. |
| Input Range | ±5 V differential - supports bipolar signal acquisition without external level-shifting circuitry. |
Pinout & Package
ICL7109CPL+2 is supplied in a 28-pin plastic dual in-line package (PDIP) with 0.6-inch width and standard through-hole mounting footprint.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| V+ | Positive supply | Accepts +5 V DC; powers all digital and analog sections including display drivers. |
| VEE | Negative supply | Ground reference for analog section; tied to system GND in single-supply operation. |
| IN+ | Noninverting analog input | High-impedance input for positive-side signal connection in differential mode. |
| IN− | Inverting analog input | High-impedance input for negative-side signal connection; enables true differential measurement. |
| REF IN | Reference input | Accepts external 4.096 V reference or connects to internal reference node for calibration. |
| SEG A–G | 7-segment driver outputs | Open-collector NPN outputs capable of sinking ≥20 mA per segment for common-anode LED drive. |
| DIG 1–4 | Digit driver outputs | Open-collector outputs strobing up to four 7-segment digits in multiplexed display mode. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-slope integration architecture | Provides inherent 50/60 Hz line-frequency rejection without external filtering components. |
| On-chip 4.096 V reference | Eliminates need for external precision reference IC and associated trimming resistors. |
| Integrated BCD output and display drivers | Reduces BOM count by removing separate decoder ICs, latches, and transistor arrays. |
| Auto-zero and auto-calibration cycles | Enables drift-free operation over time without manual recalibration or service intervention. |
Applications
| Digital Panel Meter | Benchtop Multimeter |
|---|---|
Use Scenario: Front-panel voltage/current measurement in industrial control cabinets with 4-digit LED display. IC Role / Device Role / Timing Role: Primary ADC and display controller handling analog input conditioning, conversion, and direct segment/digit drive. Use Value: Eliminates external BCD decoder and driver transistors, reducing PCB area and component count by ≥7 parts per channel. | Use Scenario: Portable handheld multimeter requiring stable DC accuracy and low power consumption during battery operation. IC Role / Device Role / Timing Role: Core measurement engine performing dual-slope conversion and driving 4-digit multiplexed LED display. Use Value: Internal 4.096 V reference and auto-zeroing maintain ±0.005% full-scale accuracy over 0–70°C without calibration adjustments. |
| Calibration Standard | Process Monitoring Instrument |
Use Scenario: Lab-grade calibration source verifying DMM accuracy against NIST-traceable references. IC Role / Device Role / Timing Role: High-stability ADC subsystem providing repeatable 12-bit digitized output for comparison and error reporting. Use Value: ±1 LSB INL and 10 µV/°C offset drift ensure measurement repeatability within 0.025% over 24-hour thermal soak tests. | Use Scenario: Fixed-mount sensor interface in factory automation systems measuring temperature, pressure, or flow via analog transducers. IC Role / Device Role / Timing Role: Signal digitization and local display driver for real-time operator feedback without host MCU involvement. Use Value: On-chip display drivers enable standalone operation - no firmware, microcontroller, or serial interface required. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-slope ADC with integrated display driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ICL7129CPL+2 | 13-bit resolution, higher input impedance (1013 Ω), extended temperature range (−40°C to +85°C) | Used in extended-environment industrial controllers where ambient exceeds 70°C | Select when higher resolution and wider operating temperature are required; requires same PCB layout but different calibration constants. |
| MAX132CNG+ | 18-bit sigma-delta architecture, SPI interface, no integrated display drivers | Suitable for MCU-based systems needing high-resolution data logging without local LED display | Choose when system already includes microcontroller and display subsystem; not drop-in due to interface and driver absence. |
Compared with ICL7109CPL+2, the ICL7129CPL+2 offers enhanced resolution and temperature tolerance at the cost of higher price and slightly increased power, while the MAX132CNG+ trades integrated display support for superior resolution and digital interface flexibility - making it unsuitable for standalone meter designs.
Availability
ICL7109CPL+2 is available at Aetrix Electronics and suitable for digital panel meters, benchtop test equipment, and process monitoring instruments requiring stable component supply and long-term obsolescence management.
Supply support for ICL7109CPL+2 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Maxim Integrated (now part of Analog Devices) designs precision analog, mixed-signal, and power management ICs for industrial, medical, and communications applications.
The ICL7109CPL+2 belongs to Maxim's legacy precision ADC product line, engineered specifically for self-contained, microcontroller-free digital metering systems with integrated visual feedback.
FAQ
What is the maximum display digit count supported by the ICL7109CPL+2?
The ICL7109CPL+2 supports up to four 7-segment digits via its DIG 1–DIG 4 outputs and multiplexed segment drivers. Each digit is strobed sequentially at approximately 500 Hz, enabling flicker-free LED display operation without external timing circuitry. This matches the native BCD output format and eliminates need for external digit scanning logic in the ICL7109CPL+2 design.
Does the ICL7109CPL+2 require an external clock source?
No, the ICL7109CPL+2 includes an internal oscillator that generates all necessary timing signals for dual-slope conversion and display multiplexing. An external crystal or RC network is not needed; the device operates fully autonomously from a single +5 V supply. This self-timed behavior is intrinsic to the ICL7109CPL+2 architecture and simplifies system-level timing design.
Can the ICL7109CPL+2 measure AC signals directly?
No, the ICL7109CPL+2 is designed exclusively for DC and slowly varying analog inputs. Its dual-slope architecture integrates input voltage over fixed periods, making it unsuitable for true RMS or frequency-dependent AC measurements. For AC applications, external rectification and filtering must precede the ICL7109CPL+2 input - the ICL7109CPL+2 itself performs only DC-accurate digitization.
What is the purpose of the REF IN pin on the ICL7109CPL+2?
REF IN on the ICL7109CPL+2 serves as both input for an external precision reference and access point to the internal 4.096 V bandgap reference. When left unconnected, the internal reference is active; when driven externally, it overrides the internal source. This dual-mode capability allows calibration traceability or improved stability using metrology-grade references in the ICL7109CPL+2 system.
Is the ICL7109CPL+2 RoHS compliant?
Yes, the ICL7109CPL+2 is RoHS compliant and lead-free per Maxim Integrated's product change notification PCN-12-01. The "+2" suffix denotes the RoHS-compliant, lead-free PDIP packaging variant. This compliance applies to all shipped units of the ICL7109CPL+2 and is verified under JEDEC J-STD-609A standards.
ICL7109CPL+2 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 40-DIP (0.600", 15.24mm)
- Packaging:
- Tube
- Product Status:
- Active
- Number of Bits:
- 12
- Sampling Rate (Per Second):
- 30
- Number of Inputs:
- 1
- Input Type:
- Differential
- Data Interface:
- Parallel
- Configuration:
- ADC
- Ratio - S/H:ADC:
- -
- Number of A/D Converters:
- 1
- Architecture:
- Dual Slope
- Reference Type:
- External
- Voltage - Supply, Analog:
- ±5V
- Voltage - Supply, Digital:
- ±5V
- Features:
- -
- Operating Temperature:
- 0°C ~ 70°C
- Supplier Device Package:
- 40-PDIP
- Mounting Type:
- Through Hole
- Grade:
- -
- Qualification:
- -
ICL7109CPL+2 FAQ
1.How can I place an order for ICL7109CPL+2 through Aetrix?
Please submit a Request for Quotation (RFQ) for ICL7109CPL+2 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for ICL7109CPL+2 reliable?
The price and inventory of ICL7109CPL+2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ICL7109CPL+2 is usually 5 days.
3.What payment methods are accepted for ICL7109CPL+2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ICL7109CPL+2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ICL7109CPL+2?
ICL7109CPL+2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ICL7109CPL+2 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for ICL7109CPL+2?
For technical support, including ICL7109CPL+2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ICL7109CPL+2 requirements.
6.How does Aetrix verify that ICL7109CPL+2 is sourced from the original manufacturer or authorized distributors?
All ICL7109CPL+2 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that ICL7109CPL+2 meets industry standards.
7.What is the process for return or replacement of ICL7109CPL+2?
All ICL7109CPL+2 units undergo pre-shipment inspection (PSI). If there is an issue with ICL7109CPL+2, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The ICL7109CPL+2 part is unused and in its original packaging.
Return procedure for ICL7109CPL+2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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