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Analog Devices Inc./Maxim Integrated ICL7632BCSE
- Part No.:
- ICL7632BCSE
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ICL7632BCSE.pdf
- Description:
- IC CMOS 3 CIRCUIT 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,889
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Product details
Overview
ICL7632BCSE from Maxim Integrated is a dual, low-power, ultra-low-input-bias-current CMOS operational amplifier with pin-selectable quiescent current (10 μA/100 μA/1 mA per amplifier), ±1 V to ±8 V supply range, 1 pA typical input bias current, and rail-to-rail output swing - designed for high-impedance sensor interfacing in battery-powered pH meters and photodiode amplifiers.
For engineers reviewing the ICL7632BCSE datasheet, ICL7632BCSE pinout, ICL7632BCSE application, or ICL7632BCSE equivalent, this page delivers verified specifications, package mapping to 16-pin SOIC (SE), confirmed dual-amplifier topology, temperature-rated performance (0°C to +70°C), and real-world design trade-offs between bandwidth, power, and offset nulling capability.
Technical Context
The ICL7632BCSE implements two independent CMOS op amps in a single monolithic die, each featuring programmable quiescent current via dedicated IOC pins (Pin 5 and Pin 15), enabling dynamic optimization of unity-gain bandwidth (0.044–1.4 MHz) and slew rate (0.016–1.6 V/µs) without changing external circuitry. Input stage uses p-channel MOSFETs to achieve 1 pA typical bias current and 10¹² Ω input resistance.
It supports offset nulling via dedicated OFFSET pins (Pins 2 & 3 for Amp A; Pins 13 & 14 for Amp B), with nulling range dependent on selected IQ - fully effective at 100 μA and 1 mA, but limited at 10 μA for higher VOS grades. Common-mode voltage range varies with IQ setting: ±4.4 V at 10 μA, narrowing to ±3.7 V at 1 mA under ±5 V supplies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Bias Current | 1 pA typical (25°C); enables stable DC coupling with >1 GΩ source impedances in picoammeter and electrochemical sensor front-ends |
| Supply Voltage Range | ±1 V to ±8 V (or 2–16 V single-supply); supports operation from coin-cell (3 V) up to industrial rails (15 V) |
| Quiescent Current | Programmable per amplifier: 10 μA / 100 μA / 1 mA; allows trade-off between battery life and signal bandwidth |
| Unity-Gain Bandwidth | 0.044 MHz (at 10 μA), 0.48 MHz (at 100 μA), 1.4 MHz (at 1 mA); sets usable small-signal frequency limit per IQ setting |
| Output Voltage Swing | ±4.9 V into 1 MΩ (at ±5 V, 10 μA); delivers >98% rail-to-rail swing for maximum dynamic range in low-voltage systems |
| Input Offset Voltage | 5 mV max (25°C, B-grade); matched to pH meter and precision integrator requirements where trimming is feasible |
| Input Noise Current | 0.01 pA/√Hz (1 kHz); critical for low-noise amplification of photodiode currents <100 pA |
Pinout & Package
ICL7632BCSE is housed in a 16-pin Small Outline (SO) package (SE code), 3.9 mm width, JEDEC MS-012AC compliant, with exposed pad optional per variant - suitable for automated SMT assembly and moderate thermal dissipation (375 mW @ 25°C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUTA | Inverting amplifier output A; rail-to-rail CMOS output stage capable of sourcing/sinking ≥1 mA |
| 2 | OFFSETA− | Negative offset null terminal for Amp A; used with external potentiometer to trim VOS |
| 3 | OFFSETA+ | Positive offset null terminal for Amp A; connects wiper of 25 kΩ pot to V+ for nulling |
| 4 | +INA | Non-inverting input of amplifier A; high-impedance p-channel MOSFET node (10¹² Ω) |
| 5 | IOC SET A | Quiescent current control for Amp A; tie to V+ (10 μA), float (100 μA), or V− (1 mA) |
| 6 | −INA | Inverting input of amplifier A; matched to +INA for common-mode rejection |
| 7 | V+ | Positive supply rail; accepts up to +8 V (dual) or +16 V (single) |
| 8 | N.C. | No connect; internally unused; must remain unconnected per datasheet |
| 9 | +INB | Non-inverting input of amplifier B; electrically identical to +INA |
| 10 | −INB | Inverting input of amplifier B; matched pair with +INB for dual-channel symmetry |
| 11 | IOC SET B | Quiescent current control for Amp B; independent programming same as Pin 5 |
| 12 | OFFSETB+ | Positive offset null terminal for Amp B; functionally identical to Pin 3 |
| 13 | OFFSETB− | Negative offset null terminal for Amp B; functionally identical to Pin 2 |
| 14 | OUTB | Inverting amplifier output B; fully independent of OUTA; supports dual-channel signal conditioning |
| 15 | V− | Negative supply rail; accepts down to −8 V (dual) or GND (single) |
| 16 | NC | No connect; pin 16 is internally unconnected and must be left floating |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low input bias current | 1 pA typical enables direct connection to glass pH electrodes and high-Z piezoelectric sensors without leakage-induced drift |
| Programmable quiescent current | Three discrete IQ settings per amplifier allow runtime optimization of power vs. bandwidth in portable instrumentation |
| Rail-to-rail output swing | Swings within 20 mV of rails at light loads, maximizing ADC utilization in 3.3 V or 5 V data acquisition systems |
| Dual independent amplifiers | Two matched op amps share supply pins but have separate inputs, outputs, and IQ/offset controls - ideal for differential front-ends or signal + reference paths |
| Offset nulling capability | Dedicated OFFSET pins per amplifier support manual trimming to sub-mV residual offset, critical for long-term integrator stability |
Applications
| pH Meter Front-End | Photodiode Transimpedance Amplifier |
|---|---|
Use Scenario: Measuring hydrogen ion concentration in aqueous solutions using a glass electrode with >100 MΩ output impedance. IC Role / Device Role / Timing Role: ICL7632BCSE serves as ultra-high-impedance buffer and DC-coupled amplifier, rejecting electrode polarization drift while preserving mV-level pH slope. Use Value: 1 pA input bias ensures <0.1 mV error from electrode leakage over 10-second sampling intervals, meeting ASTM D1293 accuracy requirements. |
Use Scenario: Converting weak photocurrents (1–100 pA) from UV/visible photodiodes into measurable voltage signals in spectrophotometers. IC Role / Device Role / Timing Role: ICL7632BCSE operates as transimpedance amplifier (TIA) with feedback resistor up to 10⁹ Ω, maintaining stability across gain settings. Use Value: 0.01 pA/√Hz noise current minimizes shot-noise floor, enabling detection of 5 pA signals at SNR > 60 dB in 10 Hz bandwidth. |
| Low-Droop Sample-and-Hold Circuit | Battery-Powered Picoammeter |
Use Scenario: Capturing and holding analog sensor outputs for multiplexed ADC conversion in portable environmental monitors. IC Role / Device Role / Timing Role: ICL7632BCSE functions as unity-gain buffer driving hold capacitor, minimizing charge injection and dielectric absorption errors. Use Value: Ultra-low IB and high RIN limit droop to <1 µV/s at 100 pF hold capacitance - extending hold time beyond 10 seconds without active refresh. |
Use Scenario: Measuring leakage currents in semiconductor packaging validation and insulation testing, requiring sub-picoamp resolution. IC Role / Device Role / Timing Role: ICL7632BCSE acts as current-to-voltage converter with guarded input and T-network feedback, referenced to guard ring potential. Use Value: Programmable 10 μA IQ mode achieves <2 µA total supply current per channel, enabling >1-year operation on CR2032 coin cell while maintaining 0.5 pA resolution. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultra-low-bias-current dual op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC1052CS8#PBF | Zero-drift auto-zero architecture; 50 nV offset, 0.1 µV/°C drift; higher supply current (170 μA), no IQ selection | Better DC precision but higher power; unsuitable for multi-day battery operation | Select when offset drift dominates system error budget and supply headroom permits >150 μA/channel |
| TLC27L2CDR | Fixed 10 μA IQ; 3 pA bias current (typ); no offset null pins; narrower supply (3–16 V single only) | Simpler layout, lower cost; lacks independent IQ control and nulling for demanding sensor calibrations | Select for cost-sensitive, single-supply designs where 3 pA bias and absence of nulling are acceptable |
Compared with LTC1052CS8#PBF and TLC27L2CDR, the ICL7632BCSE uniquely balances programmable power, guaranteed 1 pA bias, dual-channel independence, and full offset trimming - making it the only choice for battery-powered, high-precision dual-sensor systems requiring field calibration and multi-decade dynamic range.
Availability
ICL7632BCSE is available at Aetrix Electronics and suitable for pH meter manufacturing, photodiode-based analytical instruments, and portable picoammeters requiring stable component supply across extended production cycles.
Supply support for ICL7632BCSE 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 instrumentation markets.
The ICL76xx family was engineered specifically for ultra-high-impedance, low-power sensor signal conditioning - targeting applications where input leakage, battery life, and DC stability outweigh raw speed requirements.
FAQ
What is the operating temperature range for the ICL7632BCSE?
The ICL7632BCSE is rated for 0°C to +70°C ambient operation (C-grade temperature range). This is confirmed by its ordering suffix 'C' in the part number and aligns with the 'C Series' specification table on page 3 of the datasheet, which defines the commercial temperature grade.
Does the ICL7632BCSE support rail-to-rail input voltage?
No, the ICL7632BCSE does not feature rail-to-rail input. Its common-mode voltage range is specified as –0.4 V to +0.6 V relative to the supplies (e.g., –4.4 V to +4.4 V on ±5 V rails at 10 μA IQ), meaning inputs must stay within ~0.6 V of either rail - unlike modern RRO input op amps.
Can both amplifiers in the ICL7632BCSE be configured with different quiescent currents?
Yes. The ICL7632BCSE provides independent IQ control: Pin 5 sets quiescent current for Amplifier A, and Pin 11 sets it for Amplifier B. Each can be tied to V+, floated, or tied to V− to select 10 μA, 100 μA, or 1 mA respectively - enabling asymmetric power allocation per channel.
Is the ICL7632BCSE internally compensated for unity-gain stability?
Yes. As a member of the ICL763X triple/dual series (excluding ICL7614), the ICL7632BCSE is internally compensated and stable at unity gain across all IQ settings. No external compensation capacitor is required, simplifying layout versus externally compensated variants like ICL7614.
What is the maximum load capacitance the ICL7632BCSE can drive without instability?
The ICL7632BCSE can safely drive up to 100 pF capacitive load with 1 MΩ series isolation (as tested in slew rate and pulse response figures), but becomes prone to ringing above 500 pF. For larger loads, a 10–100 Ω series resistor at the output is recommended to maintain phase margin.
ICL7632BCSE 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:
- 5 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
ICL7632BCSE FAQ
1.How can I place an order for ICL7632BCSE through Aetrix?
Please submit a Request for Quotation (RFQ) for ICL7632BCSE 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 ICL7632BCSE reliable?
The price and inventory of ICL7632BCSE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ICL7632BCSE is usually 5 days.
3.What payment methods are accepted for ICL7632BCSE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ICL7632BCSE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ICL7632BCSE?
ICL7632BCSE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ICL7632BCSE 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 ICL7632BCSE?
For technical support, including ICL7632BCSE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ICL7632BCSE requirements.
6.How does Aetrix verify that ICL7632BCSE is sourced from the original manufacturer or authorized distributors?
All ICL7632BCSE 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 ICL7632BCSE meets industry standards.
7.What is the process for return or replacement of ICL7632BCSE?
All ICL7632BCSE units undergo pre-shipment inspection (PSI). If there is an issue with ICL7632BCSE, 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 ICL7632BCSE part is unused and in its original packaging.
Return procedure for ICL7632BCSE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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