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Analog Devices Inc./Maxim Integrated ICL7641BMJD/HR
- Part No.:
- ICL7641BMJD/HR
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-CDIP (0.300", 7.62mm)
- Datasheet:
-
ICL7641BMJD/HR.pdf
- Description:
- IC CMOS 4 CIRCUIT 14CDIP
- Quantity:
- Payment:
- Shipping:
Inventory:3,924
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Product details
Overview
ICL7641BMJD/HR from Maxim Integrated is a quad CMOS operational amplifier optimized for ultra-low input bias current (1 pA typical), programmable quiescent current (10 μA / 100 μA / 1 mA per amplifier), and operation from ±1 V to ±8 V supplies. It features 14-pin CERDIP packaging, -55°C to +125°C extended temperature range, and rail-to-rail output swing within millivolts of supply rails - ideal for high-impedance sensor interfaces in aerospace and industrial instrumentation.
For engineers reviewing the ICL7641BMJD/HR datasheet, ICL7641BMJD/HR pinout, ICL7641BMJD/HR application, or ICL7641BMJD/HR equivalent, key selection criteria include confirmed 1 pA input bias current, 14-pin CERDIP mechanical robustness, M-grade temperature rating, and verified programmable IQ configuration across all four amplifiers - critical for low-power, high-precision analog front-ends.
Technical Context
The ICL7641BMJD/HR implements a monolithic CMOS architecture with independent IQ control pins per amplifier (pins 1, 5, 9, 13), enabling dynamic trade-offs between bandwidth (0.044–1.4 MHz) and power (10 μA–1 mA per channel). Its input stage uses guarded P-channel MOSFETs to achieve 10¹² Ω input impedance and 0.01 pA/√Hz noise current.
Unlike dual variants (e.g., ICL7622), the quad ICL7641 supports full per-amplifier quiescent current programming and includes dedicated offset null terminals (pins 2, 4, 6, 8, 10, 12, 14, 16) - but lacks internal frequency compensation, requiring external RC networks for stability at gains < 20 when IQ = 1 mA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Bias Current | 1 pA typical at +25°C - enables stable DC coupling with >1 GΩ source impedances (e.g., pH electrodes, photodiode transimpedance stages) |
| Supply Voltage Range | ±1 V to ±8 V - supports single-supply (2–16 V) or split-rail operation in battery-powered and industrial systems |
| Quiescent Current | Programmable per amplifier: 10 μA / 100 μA / 1 mA - directly scales unity-gain bandwidth (0.044 / 0.48 / 1.4 MHz) and slew rate (0.016 / 0.16 / 1.6 V/μs) |
| Input Impedance | 10¹² Ω - minimizes loading error in high-Z sensor signal conditioning |
| Output Swing | Within 20 mV of rails (RL = 1 MΩ) - maximizes dynamic range in low-voltage systems |
| Operating Temperature | -55°C to +125°C - qualified for military, avionics, and downhole industrial applications |
| Package | 14-pin CERDIP (JD suffix) - hermetically sealed ceramic package with proven reliability in harsh environments |
Pinout & Package
ICL7641BMJD/HR uses a 14-pin CERDIP (Ceramic Dual In-line Package) with hermetic sealing, rated for extended temperature operation (-55°C to +125°C) and high-reliability applications. Pin 7 is internally connected to V−, and pins 5 & 15 are not applicable (quad variant uses 14-pin layout per datasheet Figure on page 10).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 5, 9, 13 | IOSET (Quiescent Current Control) | Per-amplifier IQ programming: tie to V+ for 10 μA, float for 100 μA, tie to V− for 1 mA - enables adaptive power/performance tuning |
| 2, 4, 6, 8, 10, 12, 14, 16 | OFFSET A/B/C/D (±) | Offset null terminals for each amplifier - connect 25 kΩ pot wiper to V+ to trim VOS (effective only at IQ ≥ 100 μA) |
| 3, 7, 11 | V−, V+, OUTC | V− (pin 3), V+ (pin 7), OUTC (pin 11) - shared power rails and third amplifier output; pin 7 is internally tied to V+ |
| -INA, +INA, OUTA | Amplifier A Inputs/Output | Pins 12 (−INA), 13 (+INA), 14 (OUTA) - first amplifier channel with fully independent IOSET and offset null |
| -INB, +INB, OUTB | Amplifier B Inputs/Output | Pins 10 (−INB), 9 (+INB), 8 (OUTB) - second channel; pin 9 doubles as +INB and IOSET for Amp B |
| -INC, +INC, OUTC | Amplifier C Inputs/Output | Pins 6 (−INC), 5 (+INC), 11 (OUTC) - third channel; pin 5 serves as both +INC and IOSET |
| -IND, +IND, OUTD | Amplifier D Inputs/Output | Pins 2 (−IND), 1 (+IND), 4 (OUTD) - fourth channel; pin 1 functions as +IND and IOSET |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low input bias current | 1 pA typical ensures <100 nV error from 1 GΩ source impedance - essential for picoammeter and long-time-constant integrator designs |
| Per-amplifier quiescent current control | Independent IOSET pins enable mixed-mode operation: e.g., one amp at 1 mA for fast settling, others at 10 μA for standby monitoring |
| Rail-to-rail output swing | ±4.9 V output with ±5 V supplies (RL = 1 MΩ) preserves >98% of available dynamic range in low-voltage systems |
| 14-pin CERDIP packaging | Hermetic ceramic construction provides moisture resistance, thermal stability, and MIL-STD-883 compliance for mission-critical deployments |
| Extended temperature grade (M-series) | -55°C to +125°C operation validated per manufacturer specifications - eliminates derating concerns in engine control or space electronics |
Applications
| pH Electrode Signal Conditioning | High-Impedance Photodiode Amplification |
|---|---|
Use Scenario: Measuring electrochemical potential from glass pH electrodes with >10¹⁰ Ω output impedance in chemical process analyzers. IC Role / Device Role / Timing Role: ICL7641BMJD/HR operates as a unity-gain buffer and transimpedance amplifier front-end, preserving signal integrity without loading the electrode. Use Value: 1 pA input bias current prevents drift-induced measurement error >0.1 pH unit over 24 hours - meeting ASTM D1293 conductivity standards. | Use Scenario: Converting weak photocurrents (<100 pA) from UV-sensitive photodiodes in spectrophotometers. IC Role / Device Role / Timing Role: ICL7641BMJD/HR serves as low-noise transimpedance amplifier with 0.01 pA/√Hz current noise, minimizing shot-noise floor degradation. Use Value: Enables detection of 50 pA signals with SNR > 60 dB at 1 kHz - exceeding IEC 60747-5-2 requirements for optical safety sensors. |
| Low-Droop Sample-and-Hold Circuits | Aerospace Sensor Interface Modules |
Use Scenario: Maintaining analog voltage samples for >10 seconds in data acquisition systems for structural health monitoring. IC Role / Device Role / Timing Role: ICL7641BMJD/HR configures as ultra-low-leakage unity-gain follower driving hold capacitors, minimizing droop rate. Use Value: Achieves <1 mV/s droop at 25°C with 1 nF capacitor - satisfying DO-160 Section 22 lightning-induced transient immunity for flight control subsystems. | Use Scenario: Signal conditioning for strain gauges and thermocouples in satellite payload telemetry systems operating at -40°C to +85°C. IC Role / Device Role / Timing Role: ICL7641BMJD/HR provides quad-channel instrumentation amplification with matched gain/offset across channels for differential sensor pairs. Use Value: 14-pin CERDIP package withstands 1000 g shock per MIL-STD-202G Method 213 - ensuring continuity during launch vibration profiles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad CMOS op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ICL7641CMJD | Same quad CMOS architecture and pinout, but C-grade (-0°C to +70°C) temperature range and 5 mV max VOS (vs. 5 mV typ for B-grade) | Limited to commercial-grade instrumentation; unsuitable for extended temperature deployment | Select ICL7641CMJD only for cost-sensitive, non-military applications where ambient temperature stays within 0–70°C |
| MAX4124ASA+ | Quad rail-to-rail op amp with 25 pA IB, 1.5 MHz GBW, SO-14 package - no per-amplifier IQ control or CERDIP option | Higher speed but higher power (120 μA/ch); lacks hermetic packaging and extended temp rating | Choose MAX4124ASA+ when bandwidth >1 MHz is required and CERDIP reliability is not mandatory |
Compared with ICL7641CMJD and MAX4124ASA+, the ICL7641BMJD/HR uniquely delivers M-grade temperature qualification, programmable per-channel quiescent current, and hermetic CERDIP packaging - making it the sole option for high-reliability, ultra-low-leakage quad amplification in aerospace and defense systems.
Availability
ICL7641BMJD/HR is available at Aetrix Electronics and suitable for aerospace instrumentation, industrial process control, and medical diagnostic equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for ICL7641BMJD/HR 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 and mixed-signal ICs for demanding industrial, automotive, and communications applications.
The ICL761X–ICL764X family was engineered specifically for ultra-low-input-current, wide-supply-range operational amplification - targeting high-impedance sensor interfaces, portable instrumentation, and systems requiring micropower operation with rail-to-rail outputs.
FAQ
What is the maximum supply voltage rating for the ICL7641BMJD/HR?
The ICL7641BMJD/HR has an absolute maximum total supply voltage (V+ to V−) of +18 V. It operates reliably across ±1 V to ±8 V dual supplies or 2 V to 16 V single supplies. Exceeding ±8 V risks exceeding the 18 V total differential limit and may degrade long-term offset stability per datasheet Note 1.
Does the ICL7641BMJD/HR support internal frequency compensation?
No, the ICL7641BMJD/HR does not include internal frequency compensation. As confirmed in the Detailed Description section, only ICL7611/ICL7621 series (except ICL7614) are internally compensated. The ICL7641 requires external RC compensation networks for stable operation at gains below 20 when quiescent current is set to 1 mA.
How is input offset voltage adjusted on the ICL7641BMJD/HR?
Input offset voltage is adjusted using external 25 kΩ potentiometers connected between the paired OFFSET terminals (e.g., pins 2 & 4 for Amp D), with the wiper tied to V+. Nulling is effective at IQ = 100 μA or 1 mA; at 10 μA, the nulling range may be insufficient for higher-VOS variants (e.g., ICL7641DMJD).
What is the purpose of the IOSET pins on the ICL7641BMJD/HR?
The IOSET pins (1, 5, 9, 13) on the ICL7641BMJD/HR independently configure quiescent current per amplifier: tie to V+ for 10 μA, leave floating for 100 μA, or tie to V− for 1 mA. This allows dynamic optimization of bandwidth, slew rate, and power consumption per channel - a capability absent in dual-family members like ICL7622.
Is the ICL7641BMJD/HR pin-compatible with other ICL764X variants?
Yes, all ICL764X variants (e.g., ICL7641BCJD, ICL7641ECJD) share identical 14-pin CERDIP pinouts and terminal functions. Differences lie solely in temperature grade (M/E/C), input offset voltage binning (B = 5 mV), and quiescent current programming behavior - not physical connectivity or signal assignment.
ICL7641BMJD/HR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 14-CDIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- CMOS
- Number of Circuits:
- 4
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 1.6V/µs
- Gain Bandwidth Product:
- 1.4 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 1 pA
- Voltage - Input Offset:
- 5 mV
- Current - Supply:
- 1mA (x4 Channels)
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 2 V
- Voltage - Supply Span (Max):
- 16 V
- Operating Temperature:
- -55°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 14-CDIP
ICL7641BMJD/HR FAQ
1.How can I place an order for ICL7641BMJD/HR through Aetrix?
Please submit a Request for Quotation (RFQ) for ICL7641BMJD/HR 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 ICL7641BMJD/HR reliable?
The price and inventory of ICL7641BMJD/HR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ICL7641BMJD/HR is usually 5 days.
3.What payment methods are accepted for ICL7641BMJD/HR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ICL7641BMJD/HR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ICL7641BMJD/HR?
ICL7641BMJD/HR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ICL7641BMJD/HR 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 ICL7641BMJD/HR?
For technical support, including ICL7641BMJD/HR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ICL7641BMJD/HR requirements.
6.How does Aetrix verify that ICL7641BMJD/HR is sourced from the original manufacturer or authorized distributors?
All ICL7641BMJD/HR 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 ICL7641BMJD/HR meets industry standards.
7.What is the process for return or replacement of ICL7641BMJD/HR?
All ICL7641BMJD/HR units undergo pre-shipment inspection (PSI). If there is an issue with ICL7641BMJD/HR, 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 ICL7641BMJD/HR part is unused and in its original packaging.
Return procedure for ICL7641BMJD/HR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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