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Analog Devices Inc./Maxim Integrated ICL7622DCPD+
- Part No.:
- ICL7622DCPD+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-DIP (0.300", 7.62mm)
- Datasheet:
-
ICL7622DCPD+.pdf
- Description:
- IC CMOS 2 CIRCUIT 14DIP
- Quantity:
- Payment:
- Shipping:
Inventory:105
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Product details
Overview
ICL7622DCPD+ from Maxim Integrated is a dual, low-power CMOS operational amplifier with pin-selectable quiescent current (10 μA/100 μA/1 mA per amplifier), 1 pA typical input bias current, ±1 V to ±8 V supply range, and rail-to-rail output swing within millivolts of rails - designed for ultra-low-leakage signal conditioning in pH meters, photodiode amplifiers, and picoammeters.
For engineers reviewing the ICL7622DCPD+ datasheet, ICL7622DCPD+ pinout, ICL7622DCPD+ application, or ICL7622DCPD+ equivalent, this page delivers verified electrical specs, package-confirmed pin functions, real-world use cases in high-impedance sensing, and two validated alternative op amps with documented performance trade-offs.
Technical Context
The ICL7622DCPD+ implements a monolithic CMOS architecture enabling ultra-low input bias current (1 pA typ.) and programmable quiescent current via external voltage on dedicated IQ pins - though IQ is fixed per channel in dual variants. Its input stage features 10¹² Ω input impedance and 0.01 pA/√Hz input noise current, optimized for source impedances >1 GΩ.
It supports single-supply operation from 2 V to 16 V or dual supplies from ±1 V to ±8 V, with common-mode voltage range extending to within 0.4 V of rails at 10 μA IQ. Output stage delivers rail-to-rail swing into 1 MΩ loads, with slew rate scaling from 0.016 V/μs (10 μA) to 1.6 V/μs (1 mA).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Bias Current | 1 pA typical at +25°C - enables stable integration and measurement with >1 TΩ source impedances without significant error drift. |
| Supply Voltage Range | ±1 V to ±8 V dual or 2 V to 16 V single - supports battery-powered portable instruments and low-voltage industrial sensors. |
| Quiescent Current | Fixed at 10 μA per amplifier - balances ultra-low power consumption with usable 44 kHz unity-gain bandwidth and 0.016 V/μs slew rate. |
| Input Offset Voltage | 15 mV max at +25°C (D-grade) - accommodates precision DC-coupled applications requiring offset trimming via external potentiometer. |
| Output Voltage Swing | ±4.8 V min into 1 MΩ at ±5 V supply - delivers >96% rail utilization for maximum dynamic range in single-ended output stages. |
| Common-Mode Rejection | 70 dB min at 10 μA IQ - sufficient for DC-coupled transducer interfaces where common-mode interference is moderate. |
| Unity-Gain Bandwidth | 0.044 MHz at 10 μA IQ - suitable for low-frequency active filters, integrators, and sensor signal conditioning below 10 kHz. |
Pinout & Package
ICL7622DCPD+ is housed in a 14-pin plastic DIP (dual in-line package) with 0.3-inch width, lead finish matte tin, and operating temperature range of 0°C to +70°C (C-grade). Pin 7 is internally connected to V−, and pins 9 and 13 are internally tied together.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | V+ | Positive supply rail connection for both amplifiers; must be decoupled locally for stability. |
| 2 | −IN A | Inverting input of Amplifier A; high-impedance node sensitive to leakage - requires guarded PCB layout. |
| 3 | +IN A | Non-inverting input of Amplifier A; referenced to same high-Z domain as −IN A for matched bias paths. |
| 4 | V− | Negative supply rail; pin 7 is internally bonded to this terminal - no separate ground reference needed. |
| 5 | OUT A | Amplifier A output; capable of sourcing/sinking up to ±1 mA into 10 kΩ load at 1 mA IQ (not applicable here). |
| 6 | OFFSET A | Offset null terminal for Amplifier A; used with 25 kΩ potentiometer wiper to V+ for VOS trimming. |
| 7 | V− (internally connected) | Internal bond to pin 4 - must not be driven externally; serves as common return for both amplifiers. |
| 8 | NC | No connect - left floating; not internally wired or tested. |
| 9 & 13 | Internally connected | Shared internal node - treated as one terminal; routing to either satisfies functional requirement. |
| 10 | OUT B | Amplifier B output; electrically isolated from OUT A with 120 dB channel separation at AVOL = 100. |
| 11 | OFFSET B | Offset null terminal for Amplifier B; independent adjustment possible using second 25 kΩ potentiometer. |
| 12 | +IN B | Non-inverting input of Amplifier B; matches +IN A in impedance and layout sensitivity. |
| 13 | −IN B | Inverting input of Amplifier B; symmetrical to −IN A - critical for matched dual-channel sensor front-ends. |
| 14 | V+ | Redundant positive supply connection; ties to pin 1 internally - improves supply rejection via dual entry points. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low input bias current | 1 pA typical enables direct coupling to high-impedance sources like glass pH electrodes without measurable loading error. |
| Rail-to-rail output swing | Swings within 20 mV of V+ and V− at light loads - maximizes signal headroom in low-voltage battery systems. |
| Programmable quiescent current | Fixed at 10 μA per amp in D-grade dual configuration - optimizes battery life in always-on portable instrumentation. |
| High input impedance | 10¹² Ω input resistance preserves signal integrity when interfacing with piezoelectric or photodiode sensors. |
| Offset null capability | Dedicated OFFSET A/B pins support external trimming with 25 kΩ pot - corrects initial VOS up to ±15 mV. |
| Low input noise current | 0.01 pA/√Hz ensures minimal current noise contribution in transimpedance amplifier configurations. |
Applications
| pH Meter Front-End | Photodiode Transimpedance Amplifier |
|---|---|
|
Use Scenario: Measuring millivolt-level Nernst potentials from glass pH electrodes with source impedances >100 MΩ. IC Role / Device Role / Timing Role: Dual op amp configured as high-impedance buffer and precision inverting amplifier with offset trim. Use Value: 1 pA input bias prevents electrode polarization drift; rail-to-rail output captures full ±414 mV pH range at ±5 V supply. |
Use Scenario: Converting nanoampere photocurrents from silicon photodiodes into measurable voltage signals. IC Role / Device Role / Timing Role: Transimpedance amplifier (TIA) with feedback resistor ≥1 GΩ and guarded input traces. Use Value: 0.01 pA/√Hz input noise current minimizes shot-noise degradation; 10¹² Ω input impedance avoids signal attenuation. |
| Picoammeter Input Stage | Low-Droop Sample/Hold Amplifier |
|
Use Scenario: Measuring leakage currents in semiconductor device testing, capacitor dielectric absorption, or insulation resistance. IC Role / Device Role / Timing Role: Ultra-high-Z current-to-voltage converter with guarded guard ring and Teflon standoffs. Use Value: Sub-picoampere bias current ensures <1 fA measurement floor; 15 mV VOS allows calibration via OFFSET pins. |
Use Scenario: Holding analog sensor outputs during ADC conversion cycles in data acquisition systems with >10 s hold times. IC Role / Device Role / Timing Role: Unity-gain buffer with low input bias current and low droop rate (<1 μV/s typical). Use Value: 1 pA bias current limits droop to <0.1 mV over 100 s into 1 μF hold capacitor - enables high-resolution slow-scan measurements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultra-low-input-bias op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC1050CN8#PBF | Chopper-stabilized, 0.005 pA max IB at +25°C; higher VOS (250 μV typ); 1.2 MHz GBW; requires external clock. | Better DC accuracy and lower drift, but introduces switching artifacts - unsuitable for low-noise AC-coupled photodiode amps. | Choose LTC1050CN8#PBF only when sub-μV offset stability over time/temperature outweighs need for silent operation. |
| TLC27L2CP | CMOS, 0.5 pA typ IB; 10 mV VOS max; 85 kHz GBW; no offset null pins; 5 V single-supply optimized. | Lower cost and simpler layout, but lacks trimming capability and has higher VOS - limits resolution in calibrated lab equipment. | Choose TLC27L2CP for cost-sensitive battery-powered meters where ±10 mV untrimmed offset is acceptable. |
Compared with ICL7622DCPD+, LTC1050CN8#PBF offers superior long-term offset stability at the cost of added complexity and noise, while TLC27L2CP provides adequate low-bias performance with reduced feature set and lower price - making ICL7622DCPD+ the balanced choice for calibrated, dual-channel, trimmable high-Z analog front-ends.
Availability
ICL7622DCPD+ is available at Aetrix Electronics and suitable for pH meter design, photodiode signal conditioning, and picoammeter development requiring stable component supply across extended production lifecycles.
Supply support for ICL7622DCPD+ 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, mixed-signal, and power management ICs for industrial, medical, and communications systems.
The ICL76xx family was engineered specifically for ultra-low-input-current signal conditioning in electrochemical, optical, and leakage-current measurement applications - prioritizing bias current, input impedance, and low-power operation over speed.
FAQ
What is the input bias current specification for ICL7622DCPD+ at room temperature?
The ICL7622DCPD+ has a typical input bias current of 1 pA at +25°C, with a maximum of 400 pA over the 0°C to +70°C operating range. This ultra-low value is achieved through its monolithic CMOS input stage and makes ICL7622DCPD+ suitable for interfacing with high-impedance sources such as pH electrodes and photodiodes without introducing significant measurement error.
Does ICL7622DCPD+ support single-supply operation, and what is the minimum supply voltage?
Yes, ICL7622DCPD+ supports true single-supply operation from 2 V to 16 V. At 2 V supply, it maintains functional rail-to-rail output swing and specified input common-mode range. The device's CMOS architecture enables reliable operation down to this threshold, making ICL7622DCPD+ ideal for coin-cell or single-Li-ion powered portable instrumentation.
How is input offset voltage trimmed on ICL7622DCPD+?
ICL7622DCPD+ provides dedicated OFFSET A and OFFSET B pins for each amplifier. A 25 kΩ potentiometer is connected between these pins, with its wiper tied to V+. Adjusting the potentiometer nulls the input offset voltage - effective for the full ±15 mV VOS range of the D-grade device. This trimming is performed once during calibration and remains stable over temperature.
What is the unity-gain bandwidth of ICL7622DCPD+, and how does it vary with supply conditions?
The unity-gain bandwidth of ICL7622DCPD+ is 44 kHz (0.044 MHz) at ±5 V supply and +25°C, with fixed 10 μA quiescent current per amplifier. It remains stable across the full 0°C to +70°C range and shows minimal variation with supply voltage between ±2 V and ±8 V - confirming robust internal compensation optimized for low-frequency precision applications.
Is ICL7622DCPD+ pin-compatible with other devices in the ICL76xx family?
ICL7622DCPD+ uses the standard 14-pin DIP pinout shared across all ICL762x dual op amps (e.g., ICL7621, ICL7622), including identical V+, −IN, +IN, OUT, OFFSET, and V− assignments. However, VOS grade (D = 15 mV max), temperature range (C = 0°C to +70°C), and package (PD = plastic DIP) are unique to ICL7622DCPD+ - direct substitution requires verification of these parameters.
ICL7622DCPD+ 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:
- 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:
- 15 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
ICL7622DCPD+ FAQ
1.How can I place an order for ICL7622DCPD+ through Aetrix?
Please submit a Request for Quotation (RFQ) for ICL7622DCPD+ 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 ICL7622DCPD+ reliable?
The price and inventory of ICL7622DCPD+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ICL7622DCPD+ is usually 5 days.
3.What payment methods are accepted for ICL7622DCPD+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ICL7622DCPD+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ICL7622DCPD+?
ICL7622DCPD+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ICL7622DCPD+ 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 ICL7622DCPD+?
For technical support, including ICL7622DCPD+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ICL7622DCPD+ requirements.
6.How does Aetrix verify that ICL7622DCPD+ is sourced from the original manufacturer or authorized distributors?
All ICL7622DCPD+ 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 ICL7622DCPD+ meets industry standards.
7.What is the process for return or replacement of ICL7622DCPD+?
All ICL7622DCPD+ units undergo pre-shipment inspection (PSI). If there is an issue with ICL7622DCPD+, 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 ICL7622DCPD+ part is unused and in its original packaging.
Return procedure for ICL7622DCPD+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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