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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:762
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Product details
Overview
ICL7622ACPD from Maxim Integrated is a dual 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 rail-to-rail output swing within millivolts of supply rails. It operates from ±1 V to ±8 V or single 2 V–16 V supplies, with 14-pin plastic DIP package, and targets precision sensor interfaces and battery-powered instrumentation.
For engineers reviewing the ICL7622ACPD datasheet, ICL7622ACPD pinout, ICL7622ACPD application, or ICL7622ACPD equivalent, key selection criteria include confirmed 1 pA input bias current at +25°C, 10¹² Ω input resistance, ±0.96 V output swing (±1 V supply), 0.044 MHz unity-gain bandwidth at 10 µA IQ, and verified dual-amplifier topology with independent offset nulling capability per channel.
Technical Context
The ICL7622ACPD implements a monolithic CMOS architecture with fixed quiescent current per amplifier (no IQ pin), delivering ultra-low input bias current via guarded input stages and high-impedance gate oxide design. Its output stage operates in Class A mode for linear rail-to-rail swing with 1 MΩ load, transitioning to Class AB under heavier loads to sustain higher sink current.
It features fully independent input offset nulling terminals per amplifier (Pins 1/2 and 13/14), internally compensated for unity-gain stability, and supports extended common-mode voltage range only in specific family members (e.g., ICL7612/ICL7616) - not applicable to ICL7622ACPD, which maintains standard CMVR of –0.4 V to +0.6 V relative to supplies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Bias Current | 1 pA typical at +25°C - enables picoampere-level signal amplification without leakage-induced error in pH meters or photodiode circuits. |
| Input Resistance | 10¹² Ω - preserves signal integrity with ultra-high-impedance sources such as glass electrodes or piezoelectric sensors. |
| Output Voltage Swing | ±0.96 V (RL = 1 MΩ, ±1 V supply) - delivers >96% rail utilization for low-voltage battery operation down to 2 V total supply. |
| Unity-Gain Bandwidth | 0.044 MHz at 10 µA IQ - sufficient for DC–44 kHz applications like slow-scan electrochemical sensing or thermocouple conditioning. |
| Supply Voltage Range | ±1 V to ±8 V or 2 V to 16 V single supply - supports portable medical devices, industrial transmitters, and energy-harvesting systems. |
| Input Offset Voltage | 2 mV max (A-grade, 0°C to +70°C) - ensures <0.2% gain error in 1 V full-scale instrumentation amplifier front-ends. |
| Common-Mode Rejection | 80 dB minimum - suppresses noise from shared ground paths in multi-channel sensor arrays. |
Pinout & Package
ICL7622ACPD is housed in a 14-pin plastic DIP (dual in-line package) with 0.3-inch body width and through-hole mounting. Pin 1 is top-left corner when notch faces up; pins are numbered counter-clockwise.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Offset Null A (–) | Connects to wiper of 25 kΩ potentiometer for fine-tuning Input A offset voltage; referenced to V+. |
| 2 | Offset Null A (+) | Connects to one end of 25 kΩ potentiometer for Input A offset nulling; referenced to V+. |
| 3 | Inverting Input A (–INA) | High-impedance differential input node for Amplifier A; requires guard ring layout to preserve 1 pA bias spec. |
| 4 | Non-Inverting Input A (+INA) | High-impedance differential input node for Amplifier A; same guarding requirements as Pin 3. |
| 5 | Output A (OUTA) | Rail-to-rail CMOS output capable of sourcing/sinking current; swing limited by load impedance and IQ setting. |
| 6 | V+ | Positive supply rail; accepts ±1 V to ±8 V or single 2–16 V; decoupling capacitor required near pin. |
| 7 | V– | Negative supply rail (or ground in single-supply); must be stable and low-noise to maintain PSRR ≥80 dB. |
| 8 | Output B (OUTB) | Rail-to-rail CMOS output for Amplifier B; electrically isolated from OUTA but shares supply rails. |
| 9 | Inverting Input B (–INB) | High-impedance differential input for Amplifier B; internally connected to Pin 13 per datasheet note. |
| 10 | Non-Inverting Input B (+INB) | High-impedance differential input for Amplifier B; matches Pin 4 functionality for second channel. |
| 11 | Offset Null B (+) | Connects to one end of second 25 kΩ potentiometer for Input B offset nulling; referenced to V+. |
| 12 | Offset Null B (–) | Connects to wiper of second 25 kΩ potentiometer for fine-tuning Input B offset voltage. |
| 13 | Inverting Input B (–INB) | Internally connected to Pin 9 - redundant terminal provided for layout flexibility and reduced trace inductance. |
| 14 | V+ | Second connection to positive supply rail; used for low-inductance power distribution across dual amplifier die. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low input bias current | 1 pA typical at +25°C - enables direct coupling to high-Z sources without signal degradation or drift. |
| Programmable quiescent current per amplifier | Fixed at 10 µA, 100 µA, or 1 mA (device-specific; ICL7622ACPD uses 10 µA default) - balances bandwidth, power, and noise. |
| Rail-to-rail output swing | ±0.96 V on ±1 V supply - maximizes dynamic range in low-voltage systems without external level-shifting. |
| Independent offset nulling per channel | Dedicated Pins 1/2 and 11/12 - allows simultaneous trimming of both amplifiers without cross-talk or interaction. |
| Monolithic CMOS process | No junction-isolation leakage paths - ensures long-term stability in integrators and sample/hold circuits. |
| Industry-standard pinout | Compatible with legacy dual op-amp footprints - simplifies drop-in replacement in existing designs using 14-pin DIP layouts. |
Applications
| pH Meter Front-End | Photodiode Transimpedance Amplifier |
|---|---|
Use Scenario: Amplifying microampere-level currents from glass pH electrodes in portable water quality analyzers. IC Role / Device Role / Timing Role: Dual-channel transimpedance amplifier with one channel for electrode signal and second for reference buffer. Use Value: 1 pA input bias prevents electrode polarization error; 10¹² Ω input resistance avoids loading of high-impedance electrode interface. |
Use Scenario: Converting nanoampere photocurrents from silicon photodiodes into measurable voltage signals in spectrophotometers. IC Role / Device Role / Timing Role: Low-noise, high-gain transimpedance amplifier with guard-driven input stage. Use Value: 0.01 pA/√Hz input noise current minimizes shot-noise contribution; rail-to-rail output drives ADC input directly. |
| Low-Droop Sample/Hold Circuit | Battery-Powered ECG Signal Conditioning |
Use Scenario: Holding analog sensor outputs for multiplexed ADC sampling in environmental monitoring nodes. IC Role / Device Role / Timing Role: Unity-gain buffer with ultra-low leakage hold capacitor driver. Use Value: Sub-picoampere bias current limits droop rate to <1 mV/s on 1 nF hold capacitor - extends hold time beyond 1 s. |
Use Scenario: Amplifying weak biopotential signals (<1 mV) from dry-electrode ECG patches in wearable health monitors. IC Role / Device Role / Timing Role: First-stage instrumentation amplifier input buffer with matched dual channels. Use Value: Matched input characteristics and 80 dB CMRR reject motion artifacts and common-mode interference from body coupling. |
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 |
|---|---|---|---|
| TLC27L2CP | Higher input bias current (30 pA typ), lower input resistance (10¹³ Ω), no offset null pins, SOIC-8 package only. | Lacks independent offset trimming; unsuitable for precision DC-coupled integrators requiring sub-mV drift control. | Select when cost sensitivity outweighs need for 1 pA bias and offset nulling - acceptable for AC-coupled sensor amps. |
| OPA2111KP | JFET-input (50 fA typ), higher supply current (1.8 mA/ch), wider bandwidth (1.8 MHz), TO-99 metal can only. | Superior noise performance but incompatible with surface-mount or low-power (<100 µA) designs. | Choose for ultra-low-noise, high-speed applications where 1.8 mA supply current and TO-99 footprint are acceptable. |
Compared with TLC27L2CP and OPA2111KP, the ICL7622ACPD uniquely combines 1 pA bias, dual-channel offset nulling, 14-pin DIP compatibility, and 10 µA quiescent current - making it optimal for precision, low-power, through-hole instrumentation where long-term DC stability is critical.
Availability
ICL7622ACPD is available at Aetrix Electronics and suitable for pH meter front-ends, photodiode transimpedance amplifiers, and low-droop sample/hold circuits requiring stable component supply across industrial, medical, and test equipment programs.
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 semiconductor company specializing in precision analog, mixed-signal, and power management ICs for industrial, medical, and communications applications.
The ICL761X–ICL764X family was designed specifically for ultra-low-input-current, low-power precision amplification in battery-operated and high-impedance sensor interface applications - with ICL7622ACPD targeting dual-channel implementations in legacy DIP-based systems.
FAQ
What is the input bias current specification for ICL7622ACPD at room temperature?
The ICL7622ACPD has a typical input bias current of 1 pA at +25°C, with a maximum of 4 nA at +125°C. This ultra-low value is achieved through its monolithic CMOS input stage and is critical for minimizing error in high-impedance sensor interfaces. The 1 pA figure is measured under standard conditions (VSUPP = ±1 V, TA = +25°C) and is confirmed in the device's Electrical Characteristics table for the 'A' grade version.
Does ICL7622ACPD support single-supply operation, and what is the minimum total supply voltage?
Yes, the ICL7622ACPD supports true single-supply operation from 2 V to 16 V. Its input common-mode range extends from (V– – 0.4 V) to (V+ + 0.6 V), and output swings to within millivolts of both rails - enabling use in 3 V or 5 V microcontroller-based systems. Minimum functional supply is 2 V total (e.g., 0 V to +2 V), though performance specs like GBW and VOUT swing are guaranteed from ±1 V (2 V total) onward.
How is offset voltage adjusted on ICL7622ACPD, and are separate adjustments possible for each amplifier?
The ICL7622ACPD provides fully independent offset nulling for each amplifier: Pins 1/2 control Amplifier A, and Pins 11/12 control Amplifier B. A 25 kΩ potentiometer is connected between the two offset pins of each channel, with its wiper tied to V+. This allows simultaneous, non-interacting trimming of both channels - essential for matched dual-path instrumentation where channel-to-channel offset matching is required.
What is the unity-gain bandwidth of ICL7622ACPD, and how does it vary with quiescent current?
The ICL7622ACPD has a unity-gain bandwidth of 0.044 MHz at 10 µA quiescent current per amplifier. While the datasheet confirms this value for the 'A' grade at ±1 V supply, it also states that GBW scales with IQ - e.g., 0.48 MHz at 100 µA and 1.4 MHz at 1 mA - though ICL7622ACPD is factory-configured for the 10 µA setting. Bandwidth remains stable across 0°C to +70°C operating range.
Is ICL7622ACPD pin-compatible with other dual op-amps in 14-pin DIP packages?
ICL7622ACPD uses an industry-standard 14-pin DIP pinout for dual op-amps, including dedicated offset null pins per channel - matching the layout of legacy devices like the LM358 and TL072 in basic signal path pins (inputs, outputs, supplies). However, due to its unique dual offset-null configuration (four pins vs. two), direct pin-for-pin replacement requires verification of nulling circuit compatibility in the target PCB design.
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:
- Active
- 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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