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Analog Devices Inc./Maxim Integrated ICL7632ECSE
- Part No.:
- ICL7632ECSE
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ICL7632ECSE.pdf
- Description:
- IC CMOS 3 CIRCUIT 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:625
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Product details
Overview
ICL7632ECSE from Maxim Integrated is a dual, low-power CMOS operational amplifier with pin-selectable quiescent current (10μA/100μA/1mA per amplifier), ultra-low input bias current (1pA typical), and rail-to-rail output swing within millivolts of supply rails. It operates from ±1V to ±8V or 2V–16V single supply and is optimized for high-impedance sensor interfaces such as pH meters and photodiode amplifiers.
For engineers reviewing the ICL7632ECSE datasheet, ICL7632ECSE pinout, ICL7632ECSE application, or ICL7632ECSE equivalent, key selection criteria include its programmable IQ, 1pA bias current, 10¹²Ω input impedance, ±4.8V output swing at ±5V supply (C-temp), and compatibility with battery-powered, low-leakage, and long-time-constant integrator designs.
Technical Context
The ICL7632ECSE implements a monolithic CMOS architecture enabling ultra-low input bias current and programmable quiescent current via external voltage applied to the IOC SET pin. Its dual-channel design supports independent gain configurations per amplifier, with internal unity-gain compensation eliminating need for external components in most applications.
It features offset null capability on both channels using dedicated OFFSET pins, and delivers stable operation across wide common-mode voltage ranges (±4.4V at IQ = 10μA) while maintaining 120dB channel separation-critical for multi-amplifier signal conditioning in precision analog front-ends.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Bias Current | 1pA typical - enables accurate measurement of picoamp-level currents in photodiode/pH sensor circuits |
| Quiescent Current | Programmable: 10μA / 100μA / 1mA per amp - allows dynamic trade-off between power and bandwidth (GBW = 0.044/0.48/1.4 MHz) |
| Input Impedance | 10¹²Ω - preserves signal integrity when driving from high-impedance sources like glass electrodes |
| Output Swing | ±4.8V @ ±5V supply, RL = 1MΩ - delivers >96% rail-to-rail dynamic range for maximum ADC utilization |
| Supply Range | ±1V to ±8V or 2V–16V single - supports direct integration into 3.3V, 5V, and 12V industrial/battery systems |
| Channel Separation | 120dB - prevents crosstalk in dual-channel instrumentation (e.g., differential sensor pairs) |
| Offset Voltage | 5mV max (B-grade) - ensures <0.1% gain error in unity-gain buffer configurations |
Pinout & Package
ICL7632ECSE is housed in a 16-pin Small Outline (SO) package (JEDEC MS-012AC), 7.5mm × 10.3mm body, 1.27mm pitch, with exposed pad not electrically connected. Pin 1 marked by notch or dot; pin 5 and pin 15 internally tied to V−.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUTA | Amplifier A output - drives loads up to 10kΩ at 1mA IQ without clipping |
| 2 | IOC SET A | Quiescent current control for Amp A - connect to V+ for 10μA, mid-supply for 100μA, V− for 1mA |
| 3 | +INA | Inverting input for Amp A - high-impedance node requiring guarded layout |
| 4 | −INA | Non-inverting input for Amp A - referenced to system ground or virtual ground |
| 5 | V− | Negative supply - shared with pin 15; must be decoupled locally |
| 6 | −INB | Non-inverting input for Amp B - isolated from Amp A inputs for dual-sensor use |
| 7 | +INB | Inverting input for Amp B - matched to +INA for common-mode rejection |
| 8 | V+ | Positive supply - accepts 2V–16V single or ±1V–±8V dual rail |
| 9 | OUTB | Amplifier B output - independently configurable with separate IOC SET (pin 12) |
| 10 | IOC SET B | Quiescent current control for Amp B - identical function to pin 2, independent setting |
| 11 | +INC | Not connected - no internal connection; leave unconnected or grounded |
| 12 | −INC | Not connected - no internal connection; leave unconnected or grounded |
| 13 | N.C. | No connect - unused pin; no internal bond wire |
| 14 | OFFSET A | Offset null terminal for Amp A - used with 25kΩ potentiometer for trimming VOS |
| 15 | V− | Secondary negative supply connection - internally tied to pin 5 |
| 16 | OFFSET B | Offset null terminal for Amp B - enables independent DC calibration per channel |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low input bias current | 1pA typical enables femtoampere-level current measurement accuracy in picoammeters |
| Programmable quiescent current | Three IQ settings allow real-time optimization of power vs. speed without changing hardware |
| Rail-to-rail output swing | Swings within 20mV of rails at light loads - maximizes dynamic range in low-voltage data acquisition |
| Dual independent offset null | Separate OFFSET pins per amplifier support precision calibration in differential sensor front-ends |
| 10¹²Ω input resistance | Minimizes loading error on high-Z sources like electrochemical sensors and piezoelectric transducers |
Applications
| pH Meter Front-End | Photodiode Transimpedance Amplifier |
|---|---|
Use Scenario: High-impedance glass electrode (≥10⁹Ω) measuring hydrogen ion concentration in aqueous solution. IC Role / Device Role / Timing Role: Dual op-amp configured as unity-gain buffer (A) and precision transimpedance amplifier (B) with offset nulling. Use Value: 1pA bias current prevents electrode polarization drift; 10¹²Ω input impedance avoids signal attenuation. | Use Scenario: Converting nanoampere photocurrent from silicon PIN diode into measurable voltage under low-light conditions. IC Role / Device Role / Timing Role: Transimpedance amplifier with programmable IQ (100μA) balancing noise and bandwidth for 1kHz signal bandwidth. Use Value: 0.01pA/√Hz current noise minimizes shot-noise-limited detection floor; rail-to-rail output drives 12-bit SAR ADC directly. |
| Low-Droop Sample/Hold Circuit | Battery-Powered ECG Signal Conditioning |
Use Scenario: Capturing slow-varying biomedical signals (e.g., EEG) over seconds with minimal hold-mode voltage decay. IC Role / Device Role / Timing Role: Unity-gain buffer isolating hold capacitor from leakage paths; IQ set to 10μA for lowest possible IB. Use Value: 1pA input bias yields <1μV/s droop rate on 1nF capacitor - extends hold time beyond 10s with <1mV error. | Use Scenario: Portable electrocardiogram monitor operating from coin-cell battery with 3.3V supply and strict power budget. IC Role / Device Role / Timing Role: Dual-channel instrumentation amplifier front-end: one amp for lead-I differential gain, second for right-leg drive reference. Use Value: 10μA IQ per channel achieves 8μA total quiescent current - extends battery life to >100 hours while maintaining 80dB CMRR. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual low-power CMOS op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLC27L2CDR | Fixed 10μA IQ; no programmable current; 10mV VOS max (C-grade); 10¹³Ω input impedance | Lacks IOC SET pins - unsuitable where dynamic IQ adjustment is required | Select if fixed ultra-low power is sufficient and offset nulling is not needed |
| OPA2333AIDR | Zero-drift architecture; 0.02μV/°C VOS drift; 25pA IB; 36μA IQ (fixed); 1.8V–5.5V supply only | Superior DC precision but higher power and narrower supply range than ICL7632ECSE | Select for microvolt-level DC stability in medical diagnostics where supply is ≤5.5V |
Compared with TLC27L2CDR and OPA2333AIDR, the ICL7632ECSE uniquely combines programmable IQ, dual independent offset null, and ±8V operation - making it the only choice for battery-powered, wide-supply, high-impedance analog systems requiring field-tunable performance.
Availability
ICL7632ECSE 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 ICL7632ECSE 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 applications.
The ICL7632ECSE belongs to the ICL761X–ICL764X family - engineered specifically for ultra-low-input-current, low-power, wide-supply-voltage analog signal conditioning in battery-operated and high-impedance sensor systems.
FAQ
What is the maximum supply voltage rating for the ICL7632ECSE?
The ICL7632ECSE has an absolute maximum total supply voltage (V+ to V−) of +18V. It operates safely across ±1V to ±8V dual supplies or 2V to 16V single supplies. Exceeding ±8V or 16V risks permanent damage, and operation above +18V violates Absolute Maximum Ratings regardless of configuration.
Does the ICL7632ECSE support rail-to-rail input common-mode voltage?
No, the ICL7632ECSE does not support rail-to-rail input. Its common-mode voltage range is specified as −4.0V to +4.4V (at ±5V supply, IQ = 10μA), meaning inputs must stay ≥0.6V below V+ and ≥0.4V above V−. This limitation applies across all IQ settings and temperature ranges per the datasheet Electrical Characteristics table.
How do I configure the quiescent current for each amplifier in the ICL7632ECSE?
Each amplifier's quiescent current is set independently via its IOC SET pin: connect pin 2 (IOC SET A) or pin 10 (IOC SET B) to V+ for 10μA, to a voltage between V− + 0.8V and V+ − 0.8V for 100μA, or to V− for 1mA. These connections must be made externally with stable DC bias - no internal pull-ups or pull-downs are provided.
Can the ICL7632ECSE be used in a single-supply configuration with ground-referenced inputs?
Yes, the ICL7632ECSE supports true single-supply operation down to 2V. With V− tied to ground and V+ at 3.3V or 5V, inputs can operate from 0.4V to 2.9V (for 3.3V supply) - well within typical sensor output ranges. Output swings to within 20mV of ground and V+, enabling full-scale use of 12-bit ADCs without level-shifting.
What is the purpose of pins 11 (+INC) and 12 (−INC) on the ICL7632ECSE?
Pins 11 and 12 are No Connect (N.C.) terminals - they have no internal bond wire or circuit connection. The datasheet explicitly states "+INC" and "−INC" as not connected. These pins may be left floating or tied to ground for mechanical stability, but must never be driven or used as signal paths, as they provide zero functional benefit.
ICL7632ECSE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Amplifier Type:
- CMOS
- Number of Circuits:
- 3
- 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:
- 20 mV
- Current - Supply:
- 1mA (x3 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:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
ICL7632ECSE FAQ
1.How can I place an order for ICL7632ECSE through Aetrix?
Please submit a Request for Quotation (RFQ) for ICL7632ECSE 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 ICL7632ECSE reliable?
The price and inventory of ICL7632ECSE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ICL7632ECSE is usually 5 days.
3.What payment methods are accepted for ICL7632ECSE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ICL7632ECSE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ICL7632ECSE?
ICL7632ECSE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ICL7632ECSE 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 ICL7632ECSE?
For technical support, including ICL7632ECSE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ICL7632ECSE requirements.
6.How does Aetrix verify that ICL7632ECSE is sourced from the original manufacturer or authorized distributors?
All ICL7632ECSE 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 ICL7632ECSE meets industry standards.
7.What is the process for return or replacement of ICL7632ECSE?
All ICL7632ECSE units undergo pre-shipment inspection (PSI). If there is an issue with ICL7632ECSE, 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 ICL7632ECSE part is unused and in its original packaging.
Return procedure for ICL7632ECSE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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