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Analog Devices Inc./Maxim Integrated ICL7622DCJD
- Part No.:
- ICL7622DCJD
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-CDIP (0.300", 7.62mm)
- Datasheet:
-
ICL7622DCJD.pdf
- Description:
- IC CMOS 2 CIRCUIT 14CDIP
- Quantity:
- Payment:
- Shipping:
Inventory:793
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Product details
Overview
ICL7622DCJD from Maxim Integrated is a dual, low-power CMOS operational amplifier with pin-selectable quiescent current (10 µA / 100 µA / 1 mA per amplifier), ultra-low input bias current (1 pA typical), ±1 V to ±8 V supply range, and 14-pin CERDIP package rated for 0°C to +70°C operation. It serves as a precision signal-conditioning amplifier in battery-powered pH meters, photodiode front-ends, and long-time-constant integrators where leakage and offset stability are critical.
For engineers reviewing the ICL7622DCJD datasheet, ICL7622DCJD pinout, ICL7622DCJD application, or ICL7622DCJD equivalent, key selection criteria include its guaranteed 1 pA input bias current at +25°C, programmable IQ enabling trade-offs between bandwidth (0.044–1.4 MHz) and power, rail-to-rail output swing capability under high-impedance loads, and CERDIP packaging for hermetic reliability in industrial sensor interfaces.
Technical Context
The ICL7622DCJD implements a monolithic CMOS input stage with 10¹² Ω input resistance and 0.01 pA/√Hz input noise current, optimized for interfacing with ultra-high-impedance sources like glass pH electrodes and reverse-biased photodiodes. Its dual-channel architecture shares no internal coupling-channel separation exceeds 120 dB-enabling independent signal paths in multi-sensor systems.
Quiescent current is fixed per device variant: the "D" grade (ICL7622D) specifies 10 µA, 100 µA, or 1 mA per amplifier depending on external IQ pin voltage, directly scaling unity-gain bandwidth (0.044 MHz / 0.48 MHz / 1.4 MHz) and slew rate (0.016 V/µs / 0.16 V/µs / 1.6 V/µs) while preserving rail-swing performance across load impedances from 10 kΩ to 1 MΩ.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Bias Current | 1 pA typical at +25°C - enables stable DC gain in >10⁹ Ω source impedance circuits without significant offset drift |
| Supply Voltage Range | ±1 V to ±8 V (or 2 V to 16 V single-supply) - supports direct integration into low-voltage portable instrumentation |
| Output Voltage Swing | ±4.8 V min (RL = 1 MΩ, ±5 V supplies) - delivers >96% rail-to-rail dynamic range for maximum signal fidelity |
| Unity-Gain Bandwidth | 0.044 MHz (IQ = 10 µA), 0.48 MHz (IQ = 100 µA), 1.4 MHz (IQ = 1 mA) - allows selectable speed/power optimization per channel |
| Input Resistance | 10¹² Ω - prevents loading of high-Z sensors such as electrochemical cells and piezoelectric transducers |
| Common-Mode Rejection | 70–96 dB (depends on IQ setting) - maintains accuracy in noisy industrial environments with ground differentials |
| Operating Temperature | 0°C to +70°C - qualified for commercial-grade embedded measurement systems with moderate thermal cycling |
Pinout & Package
ICL7622DCJD is housed in a 14-lead CERDIP (Ceramic Dual In-line Package) with hermetic sealing, 0.3-inch width, and through-hole mounting compatibility. The package provides superior moisture resistance and long-term parameter stability versus plastic DIP variants.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | V− (Amplifier A) | Negative supply rail connection for Channel A - shared with Pin 14 (V− for Channel B) |
| 2 | −INA | Inverting input of Channel A - high-impedance CMOS node requiring guarded PCB layout |
| 3 | +INA | Non-inverting input of Channel A - referenced to same guard potential as Pin 2 |
| 4 | OUTA | Amplifier A output - capable of sourcing/sinking current up to ±1 mA (load-dependent) |
| 5 | OFFSETA | Offset null terminal for Channel A - connects to wiper of 25 kΩ potentiometer for VOS trimming |
| 6 | V+ | Positive supply rail - common to both amplifiers; decoupling capacitor required near Pin 6 |
| 7 | OFFSETB | Offset null terminal for Channel B - independent adjustment from Channel A |
| 8 | OUTB | Amplifier B output - electrically isolated from OUTA; supports independent feedback networks |
| 9 | +INB | Non-inverting input of Channel B - internally connected to Pin 13 per datasheet note |
| 10 | −INB | Inverting input of Channel B - matched input structure to Pin 2 for common-mode rejection |
| 11 | N.C. | No connect - unused internal node; must remain floating |
| 12 | OFFSETB | Duplicate OFFSETB terminal - tied internally to Pin 7; used for layout flexibility |
| 13 | +INB | Duplicate non-inverting input for Channel B - tied internally to Pin 9 |
| 14 | V− | Negative supply rail - shared return path for both amplifiers; connects to system ground in single-supply use |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low input bias current | 1 pA typical ensures <1 µV/hour drift in 10 nF/10 GΩ integrator time constants |
| Programmable quiescent current | Three IQ settings (10/100/1000 µA) enable precise trade-off between battery life and signal bandwidth |
| Rail-to-rail output swing | Swings within 200 mV of rails at 1 MΩ load - maximizes dynamic range in low-voltage data acquisition |
| Independent offset nulling | Dual OFFSET pins (Pins 5 & 7/12) allow simultaneous trimming of both channels without interaction |
| CERDIP hermetic packaging | 14-lead ceramic DIP guarantees long-term parameter stability in humid or corrosive environments |
Applications
| pH Meter Front-End | Photodiode Transimpedance Amplifier |
|---|---|
Use Scenario: High-impedance glass electrode (≥10¹⁰ Ω) measuring solution acidity in portable field instruments. IC Role / Device Role / Timing Role: Precision DC-coupled amplifier conditioning microamp-level electrode current into measurable voltage. Use Value: 1 pA input bias current prevents electrode polarization and preserves calibration integrity over months of field use. |
Use Scenario: Low-light detection in medical pulse oximeters using reverse-biased silicon photodiode. IC Role / Device Role / Timing Role: Transimpedance amplifier converting photocurrent to voltage with minimal dark-current error. Use Value: 0.01 pA/√Hz input noise current and 10¹² Ω input resistance maximize SNR in sub-nA signal ranges. |
| Long-Time-Constant Integrator | Low-Droop Sample-and-Hold Circuit |
Use Scenario: Analog energy meter integrating current over 10–100 second intervals for kWh calculation. IC Role / Device Role / Timing Role: Integrator core with capacitor feedback and ultra-low leakage input path. Use Value: Sub-picoamp bias current limits droop to <1 mV/min on 1 µF hold capacitor - extends measurement window. |
Use Scenario: Precision data acquisition system capturing slow-varying thermocouple outputs. IC Role / Device Role / Timing Role: Unity-gain buffer isolating sample capacitor from load during hold phase. Use Value: 10¹² Ω input resistance reduces charge leakage, maintaining sampled voltage within ±0.01% for >10 s. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual precision op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLC27L2CD | Higher input bias current (20 pA typ), lower CMRR (80 dB), SOIC-8 package only | Limited to less demanding sensor interfaces; not suitable for pH or ultra-low-current photodiode apps | Select when cost sensitivity outweighs ultra-low IB requirement and CERDIP reliability is unnecessary |
| OPA211IDR | Lower noise (1.1 nV/√Hz), higher supply current (3.6 mA), no IQ programming, SOIC-8 | Better for medium-speed precision ADC drivers; incompatible with battery-life-critical designs | Choose for high-resolution, wideband applications where power budget allows >3 mA per channel |
Compared with TLC27L2CD and OPA211IDR, the ICL7622DCJD uniquely balances femtoamp-level input leakage, hermetic CERDIP packaging, and programmable IQ - making it irreplaceable in field-deployed electrochemical and photonic sensing where decades-long calibration stability is mandated.
Availability
ICL7622DCJD is available at Aetrix Electronics and suitable for pH meter front-ends, photodiode transimpedance amplifiers, and long-time-constant integrators requiring stable component supply across extended production lifecycles.
Supply support for ICL7622DCJD 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 systems.
The ICL7622DCJD belongs to the ICL761X–ICL764X family of ultra-low-input-current CMOS op amps designed specifically for high-impedance sensor interfacing, battery-powered instrumentation, and precision DC signal conditioning.
FAQ
What is the guaranteed maximum input bias current for ICL7622DCJD over its full operating temperature range?
The ICL7622DCJD has a maximum input bias current of 4000 pA (4 nA) at −40°C to +85°C and 4000 pA at −55°C to +125°C, with 1 pA typical at +25°C. This specification is confirmed in the Electrical Characteristics table for ICL76XXD grade devices under "Input Bias Current" (IBIAS) at 0°C ≤ TA ≤ +70°C. The ICL7622DCJD's "C" temperature grade (0°C to +70°C) guarantees ≤500 pA max at room temperature and ≤4000 pA at extremes - critical for long-term integrator stability.
Can ICL7622DCJD operate from a single 5 V supply, and what is its usable input common-mode range in that configuration?
Yes, ICL7622DCJD operates from a single 5 V supply (V+ = 5 V, V− = 0 V). Its common-mode input voltage range is −0.4 V to +0.6 V relative to the rails - meaning −0.4 V to +5.6 V absolute - verified in the Electrical Characteristics table for ICL76XXD grade. This allows inputs to extend slightly beyond ground and up to ~0.6 V below V+, supporting true single-supply operation with appropriate level-shifting for bipolar signals.
Does ICL7622DCJD support independent quiescent current programming for each of its two amplifiers?
No - the ICL7622DCJD has fixed quiescent current per amplifier based on its "D" grade designation and internal configuration. Unlike the single-amplifier ICL761X series, dual devices (ICL7621/ICL7622) do not expose an IQ pin; their quiescent current is factory-set. The datasheet explicitly states "Dual and quad amplifiers have fixed quiescent current (IQ) settings," confirming that ICL7622DCJD operates at 10 µA per amplifier unless otherwise specified by suffix (e.g., "B" = 100 µA, "A" = 1000 µA).
What is the purpose of Pins 9 and 13 on ICL7622DCJD, and how should they be handled in PCB layout?
Pins 9 and 13 are internally connected non-inverting inputs (+INB) for Channel B, as noted in the Pin Configurations diagram ("NOTE: PINS 9 & 13 ARE INTERNALLY CONNECTED"). Either pin may be used for +INB routing; the duplicate provides layout flexibility. Both must be routed to the same external signal node - no termination or isolation is required. Leaving one unconnected is acceptable, but shorting them externally is unnecessary and risks parasitic coupling.
Is the ICL7622DCJD pin-compatible with other members of the ICL762X family, such as ICL7622ACJD or ICL7622BCJD?
Yes - all ICL7622x variants (including ICL7622ACJD, ICL7622BCJD, and ICL7622DCJD) share identical 14-pin CERDIP pinouts and footprint. Differences lie solely in input offset voltage grade (A = 2 mV, B = 5 mV, D = 15 mV), temperature range (C = 0°C to +70°C), and quiescent current (A = 1000 µA, B = 100 µA, D = 10 µA). This allows direct substitution in existing layouts when recalibrating for offset or adjusting power/performance trade-offs.
ICL7622DCJD Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 14-CDIP (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:
- 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-CDIP
ICL7622DCJD FAQ
1.How can I place an order for ICL7622DCJD through Aetrix?
Please submit a Request for Quotation (RFQ) for ICL7622DCJD 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 ICL7622DCJD reliable?
The price and inventory of ICL7622DCJD are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ICL7622DCJD is usually 5 days.
3.What payment methods are accepted for ICL7622DCJD?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ICL7622DCJD transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ICL7622DCJD?
ICL7622DCJD orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ICL7622DCJD 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 ICL7622DCJD?
For technical support, including ICL7622DCJD datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ICL7622DCJD requirements.
6.How does Aetrix verify that ICL7622DCJD is sourced from the original manufacturer or authorized distributors?
All ICL7622DCJD 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 ICL7622DCJD meets industry standards.
7.What is the process for return or replacement of ICL7622DCJD?
All ICL7622DCJD units undergo pre-shipment inspection (PSI). If there is an issue with ICL7622DCJD, 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 ICL7622DCJD part is unused and in its original packaging.
Return procedure for ICL7622DCJD:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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