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Analog Devices Inc./Maxim Integrated ICL7622ACPD+
- Part No.:
- ICL7622ACPD+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-DIP (0.300", 7.62mm)
- Datasheet:
-
ICL7622ACPD+.pdf
- Description:
- IC CMOS 2 CIRCUIT 14DIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,332
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Product details
Overview
ICL7622ACPD+ from Maxim Integrated is a dual, 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 targets precision sensor interfaces, battery-powered instrumentation, and long-time-constant integrators where input leakage and power efficiency are critical.
For engineers reviewing the ICL7622ACPD+ datasheet, ICL7622ACPD+ pinout, ICL7622ACPD+ application, or ICL7622ACPD+ equivalent, key selection considerations include its 14-pin plastic DIP package, C-grade (0°C to +70°C) temperature range, 2 mV max input offset voltage (A-grade), and verified compatibility with pH meters, photodiode amplifiers, and picoammeter front-ends.
Technical Context
The ICL7622ACPD+ implements a monolithic CMOS architecture with separate, independently configurable quiescent current paths per amplifier - enabling trade-offs between bandwidth (0.044 MHz at 10 µA, up to 1.4 MHz at 1 mA), slew rate (0.016 V/µs to 1.6 V/µs), and power consumption. Its input stage features 10¹² Ω input impedance and 0.01 pA/√Hz noise current, supporting high-impedance sources without significant error.
Unlike fixed-IQ variants, the ICL7622ACPD+ inherits the family's pin-selectable IQ control logic (though implemented via internal configuration in duals), and supports offset nulling via dedicated OFFSET pins. It is internally compensated for unity-gain stability and delivers ±4.8 V output swing into 1 MΩ at ±5 V supplies with 10 µA IQ.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Bias Current | 1 pA typical - enables accurate measurement of picoamp-level photocurrents or ion currents without loading high-Z sensors. |
| Input Offset Voltage | 2 mV max (A-grade) - ensures minimal DC error in precision DC-coupled gain stages and integrators. |
| Supply Voltage Range | ±1 V to ±8 V or 2 V–16 V single supply - supports operation from coin-cell batteries (2.2 V) up to industrial rails. |
| Unity-Gain Bandwidth | 0.044 MHz at 10 µA IQ - sufficient for sub-10 kHz signal conditioning in portable medical or environmental sensors. |
| Output Voltage Swing | ±4.8 V into 1 MΩ at ±5 V supply - delivers >96% rail-to-rail swing, maximizing dynamic range in low-voltage systems. |
| Input Noise Current | 0.01 pA/√Hz - minimizes current-noise-induced errors in photodiode transimpedance amplifiers. |
| Common-Mode Range | −4.0 V to +4.4 V at ±5 V supply (10 µA IQ) - accommodates inputs near negative rail, critical for single-supply sensor buffering. |
Pinout & Package
ICL7622ACPD+ is housed in a 14-lead plastic DIP (PD) package with through-hole mounting and industry-standard pinout for dual op amps. Pin 7 is internally connected to V−, and pins 9 and 13 are internally tied together per datasheet note.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUTA | Amplifier A output - drives external load; rail-to-rail capable with defined sink/source limits. |
| 2 | −INA | Inverting input of Amp A - high-impedance node; sensitive to PCB leakage and guarding requirements. |
| 3 | +INA | Non-inverting input of Amp A - matched to −INA for common-mode rejection; requires symmetrical layout. |
| 4 | V− | Negative supply rail - also connected internally to pin 7; serves as reference for both amplifiers. |
| 5 | OFFSETA | Offset null terminal for Amp A - used with external potentiometer to trim VOS to <100 µV. |
| 6 | OFFSETB | Offset null terminal for Amp B - independent adjustment path; enables dual-channel calibration. |
| 7 | V− (tie) | Internally connected to pin 4 - must be decoupled locally; not usable as separate ground node. |
| 8 | OUTB | Amplifier B output - electrically isolated from OUTA; supports independent feedback networks. |
| 9 & 13 | Internally connected | Shared connection - no external routing required; reduces layout complexity for dual-channel designs. |
| 10 | −INB | Inverting input of Amp B - identical electrical characteristics to −INA; supports matched dual-sensor interfaces. |
| 11 | +INB | Non-inverting input of Amp B - maintains same CMRR and input impedance as +INA. |
| 12 | V+ | Positive supply rail - powers both amplifiers; requires local 0.1 µF ceramic decoupling. |
| 14 | NC | No connect - left unconnected per datasheet; no internal function or parasitic coupling. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low input bias current | 1 pA typical enables direct interfacing with >1 GΩ source impedances (e.g., glass pH electrodes) without measurable error. |
| Programmable quiescent current | Three IQ settings (10/100/1000 µA) allow dynamic trade-off between battery life and bandwidth in portable instruments. |
| Rail-to-rail output swing | Swings within 20 mV of rails at light loads - preserves full signal headroom in 3.3 V or 5 V systems. |
| Dual independent offset null pins | Separate OFFSETA/OFFSETB terminals permit channel-specific trimming - essential for dual-sensor differential measurements. |
| Wide supply range | Operates from ±1 V (2 V total) - supports energy-harvesting and ultra-low-power applications previously requiring discrete solutions. |
Applications
| pH Meter Front-End | Photodiode Transimpedance Amplifier |
|---|---|
|
Use Scenario: Measuring hydrogen ion concentration in aqueous solutions using a glass electrode with >10¹² Ω output impedance. IC Role / Device Role / Timing Role: Precision DC-coupled buffer and gain stage - rejects common-mode interference while preserving femtoamp-level electrode current. Use Value: 1 pA input bias prevents electrode polarization drift; 2 mV VOS ensures <0.01 pH unit accuracy after nulling. |
Use Scenario: Converting weak photocurrents (100 fA–1 nA) from scientific-grade photodiodes into measurable voltage signals. IC Role / Device Role / Timing Role: Low-noise transimpedance amplifier - converts current to voltage with minimal added noise and offset error. Use Value: 0.01 pA/√Hz input noise current avoids degrading SNR; 10¹² Ω input resistance prevents signal attenuation. |
| Picoammeter Input Stage | Low-Droop Sample/Hold Amplifier |
|
Use Scenario: Measuring ultra-low leakage currents in semiconductor device testing or insulation resistance validation. IC Role / Device Role / Timing Role: High-impedance current-to-voltage converter with guarded input - isolates DUT from measurement circuitry. Use Value: Input bias current ≤4 nA at +125°C ensures stable readings over temperature; 14-pin DIP allows guard ring implementation. |
Use Scenario: Holding analog sensor outputs (e.g., thermocouple, strain gauge) for ADC conversion in data loggers. IC Role / Device Role / Timing Role: Unity-gain buffer with ultra-low input current - minimizes charge loss during hold phase. Use Value: 1 pA bias current limits droop to <1 mV/s on 1 nF hold capacitor - extends hold time beyond 10 seconds. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual low-input-bias-current op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC1052CN8#PBF | Higher VOS (0.5 mV typ), lower IB (0.025 pA typ), but only 0.12 MHz GBW and no offset null pins. | Preferred for ultra-low-noise chopper-stabilized apps where offset drift matters more than bandwidth or trimming flexibility. | Select when sub-µV offset stability over time/temperature outweighs need for user-adjustable nulling or higher slew rate. |
| TLC27L2CP | Lower cost, 0.6 pA IB, but 10 mV VOS max, no offset null, and 0.085 MHz GBW - less precise and less flexible. | Suitable for cost-sensitive, non-critical sensor buffering where 10 mV offset is acceptable. | Choose only for production designs where absolute lowest bias current is secondary to BOM cost and availability. |
Compared with LTC1052CN8#PBF and TLC27L2CP, the ICL7622ACPD+ uniquely balances ultra-low bias current, user-accessible offset trimming, and programmable power/bandwidth - making it optimal for field-serviceable or recalibratable precision instruments.
Availability
ICL7622ACPD+ is available at Aetrix Electronics and suitable for pH meter design, photodiode signal conditioning, and picoammeter development requiring stable component supply across industrial and test equipment lifecycles.
Supply support for ICL7622ACPD+ 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 power management ICs for industrial, medical, and communications markets.
The ICL76xx family was designed specifically for ultra-low-leakage, low-power precision amplification - targeting applications where traditional bipolar or JFET op amps fail due to input current or supply constraints.
FAQ
What is the maximum operating temperature range for the ICL7622ACPD+?
The ICL7622ACPD+ is rated for operation from 0°C to +70°C (C-grade). This is confirmed by the "C" suffix in the part number and the ordering information table listing ICL7622ACPD with "0°C to +70°C" temperature range and "14 Plastic Dip" package. It is not qualified for extended or military temperature ranges.
Does the ICL7622ACPD+ support pin-selectable quiescent current like the ICL761X singles?
No - the ICL7622ACPD+ has fixed quiescent current per amplifier (10 µA typical), unlike the single-amplifier ICL761X series which use an external IQ pin. This is explicitly stated in the "Compensated / Programmable IQ" matrix: ICL7622 is marked "X" under "Programmable IQ" but "✓" under "Fixed IQ-10µA", confirming its fixed low-power configuration.
Can the ICL7622ACPD+ drive capacitive loads directly?
The ICL7622ACPD+ is unity-gain stable and can drive moderate capacitive loads (≤100 pF) without oscillation, as validated in typical pulse response plots with CL = 100 pF. For larger loads, an isolation resistor (e.g., 10–50 Ω) between output and capacitance is recommended to maintain phase margin and prevent peaking or ringing.
Is the ICL7622ACPD+ internally compensated for unity-gain operation?
Yes - the ICL7622ACPD+ is internally compensated for stable unity-gain operation, as confirmed by the "Compensated" column in the family matrix (✓ for ICL7622) and absence of compensation pins (e.g., COMP/OUT) in its 14-pin DIP pinout. External compensation is only required for ICL7614 and ICL7624 variants.
What does the "+" suffix in ICL7622ACPD+ indicate?
The "+" suffix denotes tape-and-reel packaging per Maxim's standard ordering convention - indicating the part is supplied in a moisture-sensitive, RoHS-compliant, factory-sealed reel format suitable for automated SMT placement. It does not denote a performance or specification enhancement over ICL7622ACPD.
ICL7622ACPD+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 14-DIP (0.300", 7.62mm)
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Amplifier Type:
- CMOS
- Number of Circuits:
- 2
- 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:
- 2 mV
- Current - Supply:
- 1mA (x2 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
ICL7622ACPD+ FAQ
1.How can I place an order for ICL7622ACPD+ through Aetrix?
Please submit a Request for Quotation (RFQ) for ICL7622ACPD+ 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 ICL7622ACPD+ reliable?
The price and inventory of ICL7622ACPD+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ICL7622ACPD+ is usually 5 days.
3.What payment methods are accepted for ICL7622ACPD+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ICL7622ACPD+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ICL7622ACPD+?
ICL7622ACPD+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ICL7622ACPD+ 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 ICL7622ACPD+?
For technical support, including ICL7622ACPD+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ICL7622ACPD+ requirements.
6.How does Aetrix verify that ICL7622ACPD+ is sourced from the original manufacturer or authorized distributors?
All ICL7622ACPD+ 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 ICL7622ACPD+ meets industry standards.
7.What is the process for return or replacement of ICL7622ACPD+?
All ICL7622ACPD+ units undergo pre-shipment inspection (PSI). If there is an issue with ICL7622ACPD+, 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 ICL7622ACPD+ part is unused and in its original packaging.
Return procedure for ICL7622ACPD+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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