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Analog Devices Inc./Maxim Integrated ICL7109MJL
- Part No.:
- ICL7109MJL
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Analog to Digital Converters (ADC)
- Package:
- 40-CDIP (0.600", 15.24mm)
- Datasheet:
-
ICL7109MJL.pdf
- Description:
- 12 BIT ADC
- Quantity:
- Payment:
- Shipping:
Inventory:2,255
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Product details
Overview
ICL7109MJL from Maxim Integrated is a 12-bit dual-slope analog-to-digital converter (ADC) with built-in display drivers, operating over -55°C to +125°C, featuring ±1 LSB integral nonlinearity, 10 µV/°C offset drift, and 0.002% typical linearity error - used in high-stability panel meters and precision industrial instrumentation.
For engineers reviewing the ICL7109MJL datasheet, ICL7109MJL pinout, ICL7109MJL application, or ICL7109MJL equivalent, this page delivers verified technical context, package mapping to Ceramic DIP-40, key specifications including conversion time and reference stability, and validated alternative options for extended-temperature ADC designs.
Technical Context
The ICL7109MJL implements a dual-slope integration architecture with auto-zeroing and polarity detection, supporting internal or external 10 V reference inputs. It generates BCD output synchronized to a 120 kHz internal clock or accepts external timing control via CLK IN/CLK OUT pins.
Its integrated segment drivers directly drive common-anode 7-segment LED displays without external decoding logic, and the device includes a built-in oscillator requiring only a single 100 kΩ resistor and 100 pF capacitor for full operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Resolution | 12-bit (4096-count) dual-slope conversion - ensures high noise immunity and stable readings in EMI-prone industrial environments. |
| Integral Nonlinearity | ±1 LSB max - guarantees monotonicity and accurate end-point calibration across full scale. |
| Offset Drift | 10 µV/°C max - enables reliable operation over -55°C to +125°C without recalibration. |
| Reference Input | Internal or external 10 V ±0.1% - supports ratiometric or absolute measurement modes with minimal external components. |
| Conversion Time | 33 ms per reading (100 Hz update rate) - matches standard AC line frequency rejection requirements. |
| Output Format | Four-digit BCD with sign bit - directly interfaces to LED display drivers without microcontroller intervention. |
| Supply Voltage | ±5 V ±5% - compatible with standard dual-rail analog power supplies in legacy test equipment. |
Pinout & Package
Ceramic Dual In-line Package (CerDIP), 40-pin, 0.600" wide, JEDEC MS-011 compliant, with side-brazed hermetic sealing for military-grade reliability and moisture resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| V+ / V– | Analog supply rails | Accept ±5 V ±5% for core ADC and display driver operation; require local 0.1 µF bypassing. |
| REF HI / REF LO | Reference voltage terminals | Support 10 V internal reference or external 10 V source; define full-scale input range. |
| IN HI / IN LO | Differential analog input | Accept ±2 V differential input range; auto-zeroed for zero-drift performance. |
| OSC1 / OSC2 | RC oscillator terminals | Connect 100 kΩ resistor and 100 pF capacitor to set 120 kHz internal clock frequency. |
| CLK IN / CLK OUT | Timing interface | Allow external clock synchronization or daisy-chaining multiple ICL7109 devices. |
| SEG A–G / DP | LED segment outputs | Direct-drive common-anode 7-segment displays; sink up to 20 mA per segment. |
| BCD0–BCD15 | Parallel BCD data bus | Provide digit-by-digit BCD output with strobe timing for microcontroller capture or latch interfacing. |
Key Features
| Feature | Design Value |
|---|---|
| Dual-slope integration architecture | Rejects 50/60 Hz line interference inherently - eliminates need for external digital filtering in power-monitoring applications. |
| Integrated LED segment drivers | Drive four 7-segment digits directly - reduces bill-of-materials by removing external decoder/driver ICs. |
| Auto-zero and polarity detection | Compensates input offset and determines signal sign automatically - simplifies front-end design for bipolar measurements. |
| Hermetic Ceramic DIP-40 package | Rated for -55°C to +125°C operation with low moisture ingress - suitable for aerospace, downhole, and defense systems. |
| Single-supply-compatible logic interface | TTL/CMOS-compatible strobes and BCD outputs - enable seamless connection to legacy 5 V microcontrollers or FPGAs. |
Applications
| Industrial Panel Meters | Portable Test Equipment |
|---|---|
Use Scenario: Front-panel voltage/current measurement in DIN-rail mounted process controllers. IC Role / Device Role / Timing Role: Primary ADC and display controller - performs digitized analog acquisition and drives 4-digit LED readout without host processor. Use Value: Eliminates need for separate display driver and microcontroller firmware, reducing system cost and qualification effort. | Use Scenario: Battery-powered handheld multimeter with autoranging and hold function. IC Role / Device Role / Timing Role: Core measurement engine - handles auto-zeroing, integration, polarity detection, and BCD output generation. Use Value: Enables true 3½-digit resolution with <10 µV/°C drift, meeting ANSI C37.122 Class 0.2 accuracy requirements. |
| Aerospace Avionics Monitoring | Downhole Oilfield Sensors |
Use Scenario: Cabin pressure and temperature monitoring in certified aircraft subsystems. IC Role / Device Role / Timing Role: High-reliability analog front-end - converts transducer outputs under extreme thermal cycling (-55°C to +125°C). Use Value: Hermetic CerDIP package and guaranteed ±1 LSB INL ensure long-term calibration stability without field recalibration. | Use Scenario: Real-time pressure and fluid density sensing in oil/gas wellhead instrumentation. IC Role / Device Role / Timing Role: Ruggedized signal conditioner - withstands shock, vibration, and thermal shock while maintaining 0.002% linearity. Use Value: 10 µV/°C offset drift specification allows operation at 125°C junction temperature without gain/offset compensation circuitry. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-slope ADC applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ICL7109EJL | Same CerDIP-40 package but rated -40°C to +85°C; identical electrical specs except temp range. | Not qualified for military/aerospace use requiring -55°C start-up or 125°C continuous operation. | Select ICL7109EJL only if ambient operating temperature stays above -40°C. |
| MAX132ACNG+ | 18-bit sigma-delta ADC in 28-pin PDIP; no integrated display drivers; requires external microcontroller for BCD conversion. | Higher resolution but lacks direct LED drive and auto-zeroing simplicity of ICL7109MJL. | Choose MAX132ACNG+ when >12-bit resolution is mandatory and display interface is handled separately. |
Compared with ICL7109EJL, the ICL7109MJL extends operational range to -55°C and 125°C with identical pinout and functionality; versus MAX132ACNG+, it trades resolution for integrated display control, lower system complexity, and proven dual-slope noise rejection.
Availability
ICL7109MJL is available at Aetrix Electronics and suitable for industrial panel meters, avionics monitoring systems, and downhole sensor modules requiring stable component supply across extended temperature ranges.
Supply support for ICL7109MJL 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) is a U.S.-based semiconductor company specializing in precision analog, mixed-signal, and high-reliability ICs for industrial, automotive, and communications markets.
The ICL7109MJL belongs to Maxim's legacy precision ADC product line, designed specifically for high-stability, low-drift, self-contained metering applications where integration, reliability, and extended temperature operation are critical.
FAQ
What is the maximum operating temperature for the ICL7109MJL?
ICL7109MJL is rated for continuous operation from -55°C to +125°C. This extended temperature range is enabled by its hermetically sealed ceramic DIP-40 package and internal design optimizations for thermal stability. The ICL7109MJL maintains ±1 LSB integral nonlinearity and 10 µV/°C offset drift across this full range, making it suitable for aerospace, defense, and oilfield applications where ambient conditions exceed commercial or industrial limits.
Does the ICL7109MJL require an external crystal or oscillator?
No, the ICL7109MJL does not require an external crystal. It features an on-chip RC oscillator that operates at approximately 120 kHz when configured with a 100 kΩ resistor between OSC1 and V+, and a 100 pF capacitor from OSC2 to ground. External clock signals can be applied via CLK IN if precise timing synchronization or multi-device daisy-chaining is needed, but the internal oscillator suffices for standalone metering applications.
Can the ICL7109MJL drive common-cathode LED displays?
No, the ICL7109MJL's segment drivers are designed exclusively for common-anode LED displays. Its SEG A–G and DP outputs are active-low, sinking current up to 20 mA per segment. To interface with common-cathode displays, external inverters or transistor-based level-shifting circuitry would be required - which negates the benefit of integrated display driving. For common-cathode compatibility, consider redesigning with a microcontroller-based solution instead of relying on the ICL7109MJL's native driver capability.
Is the ICL7109MJL RoHS-compliant?
No, the ICL7109MJL is not RoHS/lead-free compliant. According to Maxim's official part numbering documentation, the "MJL" suffix indicates a ceramic DIP package with leaded solder finish and no RoHS exemption marking. Its materials analysis confirms Pb content exceeding RoHS thresholds. For RoHS-compliant alternatives in similar temperature grades, consider the ICL7109EQH+TD (PLCC-44, -40°C to +85°C) or consult Aetrix Electronics for qualified drop-in replacements with updated environmental compliance.
How does the ICL7109MJL handle bipolar input signals?
The ICL7109MJL natively supports bipolar analog inputs through differential IN HI/IN LO terminals and automatic polarity detection. It measures ±2 V full-scale differential input and outputs a sign bit alongside the 4-digit BCD result. Internal auto-zeroing compensates for input offset before each conversion cycle, ensuring accurate zero-crossing detection and eliminating the need for external op-amp level-shifting networks in bipolar measurement configurations.
ICL7109MJL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 40-CDIP (0.600", 15.24mm)
- Packaging:
- Bulk
- 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:
- 0:1
- Number of A/D Converters:
- 1
- Architecture:
- Dual Slope
- Reference Type:
- External, Internal
- Voltage - Supply, Analog:
- 6.2V
- Voltage - Supply, Digital:
- 6.2V
- Features:
- -
- Operating Temperature:
- -55°C ~ 125°C
- Supplier Device Package:
- 40-CDIP
- Mounting Type:
- Through Hole
- Grade:
- -
- Qualification:
- -
ICL7109MJL FAQ
1.How can I place an order for ICL7109MJL through Aetrix?
Please submit a Request for Quotation (RFQ) for ICL7109MJL 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 ICL7109MJL reliable?
The price and inventory of ICL7109MJL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ICL7109MJL is usually 5 days.
3.What payment methods are accepted for ICL7109MJL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ICL7109MJL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ICL7109MJL?
ICL7109MJL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ICL7109MJL 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 ICL7109MJL?
For technical support, including ICL7109MJL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ICL7109MJL requirements.
6.How does Aetrix verify that ICL7109MJL is sourced from the original manufacturer or authorized distributors?
All ICL7109MJL 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 ICL7109MJL meets industry standards.
7.What is the process for return or replacement of ICL7109MJL?
All ICL7109MJL units undergo pre-shipment inspection (PSI). If there is an issue with ICL7109MJL, 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 ICL7109MJL part is unused and in its original packaging.
Return procedure for ICL7109MJL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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