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Analog Devices Inc./Maxim Integrated ICL7642BCPD+
- Part No.:
- ICL7642BCPD+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-DIP (0.300", 7.62mm)
- Datasheet:
-
ICL7642BCPD+.pdf
- Description:
- IC CMOS 4 CIRCUIT 14DIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,578
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Product details
Overview
ICL7642BCPD+ from Maxim Integrated is a quad, low-power CMOS operational amplifier optimized for ultra-low input bias current (1 pA typical), programmable quiescent current (10/100/1000 µA per amplifier), and rail-to-rail output swing - operating from ±1V to ±8V or 2V–16V single supply. It delivers 0.044 MHz unity-gain bandwidth at 10 µA IQ and supports precision applications including pH meter front-ends, photodiode amplifiers, and long-time-constant integrators.
For engineers reviewing the ICL7642BCPD+ datasheet, ICL7642BCPD+ pinout, ICL7642BCPD+ application, or ICL7642BCPD+ equivalent, key selection considerations include its 14-pin plastic DIP package, ±5 mV input offset voltage (B-grade), -40°C to +85°C temperature range (E-series), and verified compatibility with high-impedance sensor interfaces requiring sub-picoampere leakage performance.
Technical Context
The ICL7642BCPD+ implements a monolithic CMOS architecture with pin-selectable quiescent current via external voltage applied to the IOC (Input Offset Current) pins - enabling trade-offs between power (10 µA), bandwidth (0.044 MHz), and slew rate (0.016 V/µs) without changing layout. Its input stage features 10¹² Ω input impedance and 0.01 pA/√Hz input noise current, making it suitable for transimpedance amplification where source impedance exceeds 10⁹ Ω.
Unlike fixed-IQ dual variants (e.g., ICL7622), the ICL7642BCPD+ belongs to the quad family with independent IOC control per amplifier pair (pins 5/12 for A+B, pins 10/15 for C+D), supporting mixed-mode operation. It lacks internal frequency compensation - relying on external capacitor networks for stability in gain ≥ 20 configurations at 1 mA IQ.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | ±1V to ±8V or 2V–16V single supply - enables battery-powered and industrial rail-flexible designs. |
| Input Bias Current | 1 pA typical (25°C), ≤4 nA max at +125°C - preserves signal integrity in picoammeter and electrochemical sensor circuits. |
| Input Offset Voltage | 5 mV max (B-grade, 25°C) - sufficient for DC-coupled high-gain sensor conditioning with external nulling. |
| Unity-Gain Bandwidth | 0.044 MHz at 10 µA IQ - supports low-frequency active filters and integrators up to ~10 kHz. |
| Output Voltage Swing | ±4.8 V into 1 MΩ at ±5 V supply - achieves >96% rail-to-rail swing for dynamic range maximization. |
| Common-Mode Range | -4.0 V to +4.4 V (at 10 µA IQ, ±5 V supply) - accommodates inputs near negative rail in single-supply configurations. |
| Channel Separation | 120 dB - ensures minimal crosstalk between amplifiers in multi-channel instrumentation. |
Pinout & Package
ICL7642BCPD+ uses a 14-pin plastic DIP (dual in-line package) with 0.3-inch width and standard through-hole mounting. Pin 7 is internally connected to V−, and pins 5/12 and 10/15 serve as IOC control pairs for amplifier groups A+B and C+D respectively.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 5, 10, 12 | IOC Set (A/B/C/D) | Voltage level selects 10 µA (to V+), 100 µA (mid-rail), or 1 mA (to V−) per amplifier - enables dynamic power/bandwidth tuning. |
| 2, 3, 13, 14 | Inverting Input (−INA, −INB, −INC, −IND) | High-impedance CMOS inputs - require guarded traces and low-leakage PCB materials for <1 pA bias integrity. |
| 4, 6, 11, 15 | Non-Inverting Input (+INA, +INB, +INC, +IND) | Symmetric input structure - supports differential sensing and common-mode rejection optimization. |
| 7 | V− (Power) | Internally tied to case ground - must be connected to system ground or negative rail; no external connection required. |
| 8, 9, 16 | Output (OUTA, OUTB, OUTC, OUTD) | Rail-to-rail CMOS outputs - drive capacitive loads ≤100 pF directly; larger loads require isolation. |
| 14 | V+ | Positive supply pin - decoupling capacitor (0.1 µF ceramic) required within 5 mm for stability. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low input bias current | 1 pA typical enables accurate measurement of currents down to femtoampere levels in photodiode and ion-selective electrode circuits. |
| Programmable quiescent current | Three discrete IQ settings (10/100/1000 µA) per amplifier allow real-time trade-off between battery life and signal bandwidth in portable instruments. |
| Rail-to-rail output swing | Swings within 20 mV of rails at light loads - maximizes dynamic range in low-voltage systems (e.g., 3.3 V or 5 V supplies). |
| 10¹² Ω input resistance | Minimizes loading error on high-impedance sources such as glass pH electrodes (>100 MΩ) and piezoelectric sensors. |
| Quad configuration in 14-pin DIP | Four independent amplifiers in compact through-hole package - reduces board space vs. discrete singles/duals in multi-channel analog front-ends. |
Applications
| pH Meter Front-End | Photodiode Transimpedance Amplifier |
|---|---|
|
Use Scenario: High-impedance glass electrode measuring hydrogen ion concentration in aqueous solutions. IC Role / Device Role / Timing Role: First-stage buffer and DC-coupled amplifier converting high-Z electrode voltage to low-Z output for ADC interface. Use Value: 1 pA input bias prevents electrode polarization drift; 10¹² Ω input resistance avoids signal attenuation across >100 MΩ electrode impedance. |
Use Scenario: Converting weak photocurrent (100 fA–10 nA) from silicon photodiodes into measurable voltage signals. IC Role / Device Role / Timing Role: Transimpedance amplifier with feedback resistor up to 1 GΩ, operating in photovoltaic mode. Use Value: Sub-picoampere bias current ensures full-scale accuracy at 1 nA input; low noise current (0.01 pA/√Hz) preserves SNR in low-light detection. |
| Long-Time Constant Integrator | Low-Droop Sample/Hold Amplifier |
|
Use Scenario: Precision analog integration over seconds-to-minutes for energy metering or radiation dosimetry. IC Role / Device Role / Timing Role: Integrator core using ultra-low-leakage capacitor and CMOS op-amp to minimize voltage drift. Use Value: 1 pA input bias limits droop to <1 mV/s at 1 µF integration capacitor - enabling >100 s time constants with <1% error. |
Use Scenario: Capturing and holding slow-varying biomedical or environmental sensor outputs with minimal settling error. IC Role / Device Role / Timing Role: Unity-gain buffer with hold capacitor, leveraging low input current to reduce charge leakage during hold phase. Use Value: 1 pA bias current yields <0.1 µV/s droop on 1 µF hold capacitor - achieving <10 µV droop over 100 ms hold time. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad low-bias-current operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLC27L4CD | Fixed 10 µA IQ, 0.085 MHz GBW, 10 mV VOS (max), SOIC-14 package | Lacks programmable IQ and rail-to-rail output; lower input impedance (10¹³ Ω not specified) | Select when lowest power is mandatory and bandwidth >0.044 MHz is needed, but programmability and rail-swing are non-critical. |
| OPA4141AIDR | JFET input, 1 pA IB, 1 MHz GBW, 1.2 mV VOS (max), SOIC-14, ±2.25V to ±18V supply | Higher bandwidth and lower offset, but consumes 1.8 mA per amp - unsuitable for micro-power systems | Select when higher speed and precision are required and supply current budget allows >1 mA per channel. |
Compared with TLC27L4CD and OPA4141AIDR, the ICL7642BCPD+ uniquely balances ultra-low bias current, user-selectable power/performance scaling, and rail-to-rail output in a through-hole package - making it optimal for legacy-compatible, battery-constrained, high-impedance analog signal chains.
Availability
ICL7642BCPD+ is available at Aetrix Electronics and suitable for pH meter manufacturing, photodiode-based environmental monitoring, and low-power medical instrumentation requiring stable component supply across extended production cycles.
Supply support for ICL7642BCPD+ 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 semiconductor company specializing in precision analog, mixed-signal, and power management ICs for industrial, medical, and communications applications.
The ICL76xx family was designed specifically for ultra-low-input-current, low-power analog signal conditioning - targeting electrochemical sensors, scientific instrumentation, and portable test equipment where leakage current dominates error budgets.
FAQ
What is the maximum supply voltage rating for the ICL7642BCPD+?
The ICL7642BCPD+ has an absolute maximum total supply voltage (V+ to V−) of +18 V. Operation beyond this limit risks permanent damage. For reliable long-term use, the recommended operating range is ±1 V to ±8 V dual supply or 2 V to 16 V single supply - validated across the full -40°C to +85°C temperature range specified for the B-grade ICL7642BCPD+.
Does the ICL7642BCPD+ support rail-to-rail input common-mode range?
No, the ICL7642BCPD+ does not support rail-to-rail input common-mode range. Its specified common-mode voltage range is -4.0 V to +4.4 V (at ±5 V supply and 10 µA IQ). This excludes the supply rails themselves - inputs must remain at least 0.6 V above V− and 0.6 V below V+ for guaranteed operation. The ICL7612 and ICL7616 variants offer extended ranges, but the ICL7642BCPD+ does not.
How is quiescent current configured on the ICL7642BCPD+?
The ICL7642BCPD+ uses dedicated IOC pins (5/12 for amplifiers A+B; 10/15 for C+D) to set quiescent current per amplifier pair. Connecting an IOC pin to V+ selects 10 µA, to mid-supply (V− + 0.8 V to V+ − 0.8 V) selects 100 µA, and to V− selects 1 mA. This configuration is verified in the device's Electrical Characteristics tables and applies independently to each pair - enabling mixed-power operation across the quad.
Can the ICL7642BCPD+ be used in unity-gain stable configurations without external compensation?
No - the ICL7642BCPD+ is not unity-gain compensated. Unlike the ICL7611/ICL7621 series, the ICL7642 requires external frequency compensation for stable operation. Stability depends on closed-loop gain and load; for gains ≥20 at 1 mA IQ, no compensation is needed, but lower gains require external RC networks. This is explicitly stated in the "Frequency Compensation" section of the datasheet.
What is the input offset voltage specification for the ICL7642BCPD+?
The ICL7642BCPD+ is a B-grade device with a maximum input offset voltage (VOS) of 5 mV at +25°C and 7 mV across the full -40°C to +85°C operating range. This value is confirmed in the "Electrical Characteristics (Triple/Quad)" table on page 11 of the datasheet and applies to all four amplifiers in the package under standard test conditions (RS ≤ 100 kΩ).
ICL7642BCPD+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 14-DIP (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:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 14-PDIP
ICL7642BCPD+ FAQ
1.How can I place an order for ICL7642BCPD+ through Aetrix?
Please submit a Request for Quotation (RFQ) for ICL7642BCPD+ 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 ICL7642BCPD+ reliable?
The price and inventory of ICL7642BCPD+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ICL7642BCPD+ is usually 5 days.
3.What payment methods are accepted for ICL7642BCPD+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ICL7642BCPD+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ICL7642BCPD+?
ICL7642BCPD+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ICL7642BCPD+ 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 ICL7642BCPD+?
For technical support, including ICL7642BCPD+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ICL7642BCPD+ requirements.
6.How does Aetrix verify that ICL7642BCPD+ is sourced from the original manufacturer or authorized distributors?
All ICL7642BCPD+ 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 ICL7642BCPD+ meets industry standards.
7.What is the process for return or replacement of ICL7642BCPD+?
All ICL7642BCPD+ units undergo pre-shipment inspection (PSI). If there is an issue with ICL7642BCPD+, 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 ICL7642BCPD+ part is unused and in its original packaging.
Return procedure for ICL7642BCPD+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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