My Inquiry
My Account
Analog Devices Inc./Maxim Integrated ICL7614BCPA
- Part No.:
- ICL7614BCPA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
ICL7614BCPA.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8DIP
- Quantity:
- Payment:
- Shipping:
Inventory:6,684
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ICL7614BCPA from Maxim Integrated is a single-channel, externally compensated CMOS operational amplifier optimized for ultra-low input bias current (1 pA typical), programmable quiescent current (10 µA / 100 µA / 1 mA), and rail-to-rail output swing within millivolts of supply rails. It operates from ±1 V to ±8 V dual supplies or 2 V to 16 V single supply, and is specified for 0°C to +70°C operation in an 8-pin plastic DIP package. It is used in picoammeters, pH meter front-ends, and low-droop sample/hold amplifiers where input leakage must be minimized.
For engineers reviewing the ICL7614BCPA datasheet, ICL7614BCPA pinout, ICL7614BCPA application, or ICL7614BCPA equivalent, key selection criteria include its 1 pA bias current, external compensation flexibility (39 pF capacitor between COMP and OUT), ±0.4 V to +0.6 V common-mode input range at 10 µA IQ, and guaranteed performance across temperature with 5 mV max input offset voltage (B-grade).
Technical Context
The ICL7614BCPA uses monolithic CMOS architecture to achieve ultra-high input impedance (10¹² Ω) and ultra-low input bias current. Its externally compensated design-requiring a 39 pF capacitor between Pin 6 (COMP) and Pin 2 (OUT)-enables bandwidth optimization beyond unity-gain stability, unlike internally compensated variants (e.g., ICL7611/7612). Quiescent current is selected via the IOSET pin (Pin 1), supporting three discrete operating points that directly scale 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).
It features offset null capability via Pins 3 and 5 (OFFSET terminals), enabling calibration of input offset voltage up to 5 mV (B-grade). The output stage operates in Class A for high linearity with 1 MΩ loads, but transitions to Class AB under heavier loading-maintaining rail-swing capability while trading gain linearity for higher sink current. Input-referred noise current is 0.01 pA/√Hz at 1 kHz, critical for photodiode and high-impedance sensor interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Bias Current | 1 pA typical (25°C); enables accurate measurement of sub-picoamp currents in electrometer-grade circuits |
| Input Offset Voltage | 5 mV max (0°C to +70°C); B-grade specification ensures predictable DC error in precision DC-coupled stages |
| Supply Voltage Range | ±1 V to ±8 V dual or 2 V to 16 V single; supports battery-powered and wide-input industrial systems |
| Output Swing | ±4.8 V min (RL = 1 MΩ, ±5 V supply); delivers >96% rail-to-rail dynamic range for maximum signal utilization |
| Unity-Gain Bandwidth | 0.044 MHz at 10 µA IQ; balances ultra-low power with sufficient bandwidth for <10 kHz sensor signal conditioning |
| Common-Mode Range | –0.4 V to +0.6 V (±5 V, 10 µA IQ); accommodates inputs near negative rail in single-supply configurations |
| Input Impedance | 10¹² Ω; prevents loading of high-Z sources such as glass pH electrodes and photodiodes |
Pinout & Package
ICL7614BCPA is housed in an 8-pin plastic DIP (dual in-line package) with industry-standard pinout and through-hole mounting compatibility. The package provides mechanical robustness and thermal dissipation suitable for general-purpose PCB assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IOSET) | Quiescent current select input | Connect to V+ for 10 µA, float or mid-rail for 100 µA, or V− for 1 mA IQ setting |
| 2 (OUT) | Amplifier output | Drives load; connects to external 39 pF compensation capacitor for stability |
| 3 (OFFSET) | Offset null terminal A | Connected to wiper of 25 kΩ potentiometer for input offset trimming |
| 4 (V−) | Negative supply rail | Bias reference for internal circuitry; must be decoupled locally |
| 5 (OFFSET) | Offset null terminal B | Paired with Pin 3 to form nulling network across amplifier inputs |
| 6 (COMP) | External compensation node | Connects to Pin 2 via 39 pF capacitor; reduces phase lag for stable unity-gain operation |
| 7 (IN−) | Inverting input | High-impedance node; requires guard ring and clean layout to preserve 1 pA bias spec |
| 8 (IN+) | Non-inverting input | High-impedance node; referenced to same guard potential as IN− for leakage control |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low input bias current | 1 pA typical enables direct interfacing with >1 GΩ source impedances without significant error |
| Programmable quiescent current | Three discrete IQ settings (10/100/1000 µA) allow trade-off between power, bandwidth, and slew rate per application need |
| External frequency compensation | 39 pF capacitor between COMP and OUT pins allows bandwidth tuning beyond fixed-compensation limits |
| Rail-to-rail output swing | Swings within 20 mV of supply rails at light loads, maximizing dynamic range in low-voltage systems |
| Offset null capability | Dedicated OFFSET pins support active trimming of input offset voltage up to 5 mV (B-grade) |
Applications
| pH Meter Front-End Amplifier | Picoammeter Input Stage |
|---|---|
Use Scenario: Amplifying microvolt-level signals from glass pH electrodes with impedance >100 MΩ in portable lab instruments. IC Role / Device Role / Timing Role: High-impedance buffer and DC-coupled gain stage; maintains signal integrity by minimizing input current-induced voltage error. Use Value: 1 pA bias current prevents electrode polarization and drift; 10¹² Ω input resistance avoids signal attenuation. | Use Scenario: Measuring leakage currents in semiconductor device testing or insulation resistance validation. IC Role / Device Role / Timing Role: Transimpedance amplifier converting sub-picoamp currents into measurable voltage outputs. Use Value: Ultra-low input bias current ensures measurement accuracy down to 100 fA; low noise current (0.01 pA/√Hz) preserves SNR. |
| Low-Droop Sample/Hold Circuit | Long-Time Constant Integrator |
Use Scenario: Holding analog sensor outputs for ADC conversion in battery-powered data loggers with multi-second hold times. IC Role / Device Role / Timing Role: Unity-gain buffer driving the hold capacitor; minimizes charge leakage during hold phase. Use Value: 1 pA input bias current limits droop to <1 mV/s on a 1 µF capacitor-enabling >10 s hold time with <10 mV error. | Use Scenario: Building precision integrators for analog computing, radiation dosimetry, or slow-process control feedback. IC Role / Device Role / Timing Role: Core op-amp in integrator topology with high-value RC time constants (>10⁶ s). Use Value: Near-zero input bias current prevents integration drift; programmable IQ allows optimizing for speed vs. power in long-duration integration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultra-low-bias op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC1050CN8#PBF | Zero-drift chopper architecture; 500 pA max IB, 1.5 µV max VOS; requires no external compensation | Better DC accuracy and lower drift, but higher supply current (170 µA) and limited bandwidth (1.5 MHz) | Select when ultra-low offset drift and chopper stability outweigh need for lowest possible bias current |
| TLC27L4ACN | Single-supply CMOS op-amp; 0.6 pA typical IB, 10 mV max VOS; fixed 100 µA IQ, no offset null or external compensation | Simpler implementation for cost-sensitive designs where 10 mV VOS is acceptable and external compensation is undesirable | Select when board space, BOM count, and cost are prioritized over trimmable offset and IQ flexibility |
Compared with LTC1050CN8#PBF and TLC27L4ACN, the ICL7614BCPA uniquely combines programmable quiescent current, external compensation for bandwidth customization, and dedicated offset null pins-making it optimal for ultra-high-impedance, low-power, and precision-trimmed analog front-ends where design flexibility is required.
Availability
ICL7614BCPA is available at Aetrix Electronics and suitable for pH meter front-ends, picoammeter input stages, and low-droop sample/hold amplifiers requiring stable component supply across industrial, test & measurement, and portable instrumentation programs.
Supply support for ICL7614BCPA 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 high-performance analog, mixed-signal, and power management ICs for industrial, automotive, and communications markets.
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-prioritizing bias current, supply range, and layout-friendly packaging over raw speed.
FAQ
What is the purpose of the COMP pin on the ICL7614BCPA?
The COMP pin (Pin 6) on the ICL7614BCPA is the external frequency compensation node. Unlike internally compensated op-amps in the same family (e.g., ICL7611), the ICL7614BCPA requires a 39 pF capacitor connected between COMP and OUT (Pin 2) to ensure unity-gain stability. This external compensation allows designers to adjust bandwidth and slew rate by modifying the capacitor value-reducing capacitance increases bandwidth but risks instability if undersized. The ICL7614BCPA datasheet specifies 39 pF as the minimum for guaranteed stability.
How does the IOSET pin control quiescent current in the ICL7614BCPA?
The IOSET pin (Pin 1) on the ICL7614BCPA selects one of three quiescent current levels: 10 µA (connect to V+), 100 µA (leave floating or bias to mid-supply), or 1000 µA (connect to V−). This selection directly scales key AC performance parameters-unity-gain bandwidth increases from 0.044 MHz to 1.4 MHz, and slew rate rises from 0.016 V/µs to 1.6 V/µs-while maintaining the same ultra-low 1 pA input bias current. The ICL7614BCPA's IOSET functionality enables precise power/performance tuning per application requirement.
Can the ICL7614BCPA be used in single-supply configurations?
Yes, the ICL7614BCPA supports true single-supply operation from 2 V to 16 V. Its input common-mode range extends to within 0.4 V of the negative rail (V− or ground), and its output swings within 20 mV of both supply rails under light loads. For optimal performance in single-supply mode, bias the non-inverting input (Pin 8) at mid-rail using a resistor divider, and use the offset null pins (Pins 3 and 5) to correct any DC error introduced by VOS. The ICL7614BCPA's rail-swing capability and wide supply range make it well-suited for portable, battery-powered instrumentation.
What is the significance of the B-grade designation in ICL7614BCPA?
The "B" in ICL7614BCPA denotes the input offset voltage grade: 5 mV maximum over the full 0°C to +70°C temperature range. This is tighter than the C-grade (10 mV) and looser than the A-grade (2 mV). The B-grade offers a balanced trade-off between cost and DC precision-sufficient for most high-impedance sensor interfaces (e.g., pH meters, photodiode amps) where ultra-low bias current is more critical than sub-millivolt offset. All ICL7614BCPA units undergo factory screening to guarantee this VOS limit, ensuring predictable system-level DC error without requiring post-assembly trimming in many cases.
Why does the ICL7614BCPA require a guard ring around its input traces?
The ICL7614BCPA's 1 pA input bias current specification can only be maintained if PCB leakage paths are minimized. A guard ring-a low-impedance conductor surrounding the IN+ (Pin 8) and IN− (Pin 7) traces and tied to the same potential (e.g., circuit ground for inverting amps or output for unity-gain buffers)-prevents surface contamination and board leakage from injecting error current into the inputs. Without proper guarding, moisture, flux residue, or conformal coating defects can easily introduce nanoamp-level leakage, degrading the ICL7614BCPA's core advantage. Maxim recommends cleaning and optionally conformally coating assembled boards for humidity-prone environments.
ICL7614BCPA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- Packaging:
- Bulk
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- -
- 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
- 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:
- 8-PDIP
ICL7614BCPA FAQ
1.How can I place an order for ICL7614BCPA through Aetrix?
Please submit a Request for Quotation (RFQ) for ICL7614BCPA 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 ICL7614BCPA reliable?
The price and inventory of ICL7614BCPA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ICL7614BCPA is usually 5 days.
3.What payment methods are accepted for ICL7614BCPA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ICL7614BCPA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ICL7614BCPA?
ICL7614BCPA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ICL7614BCPA 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 ICL7614BCPA?
For technical support, including ICL7614BCPA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ICL7614BCPA requirements.
6.How does Aetrix verify that ICL7614BCPA is sourced from the original manufacturer or authorized distributors?
All ICL7614BCPA 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 ICL7614BCPA meets industry standards.
7.What is the process for return or replacement of ICL7614BCPA?
All ICL7614BCPA units undergo pre-shipment inspection (PSI). If there is an issue with ICL7614BCPA, 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 ICL7614BCPA part is unused and in its original packaging.
Return procedure for ICL7614BCPA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ICL7614BCPA Tags
-
LM358DT
STMicroelectronics
-
LM358DR
Texas Instruments
-
LM2904DR
Texas Instruments
-
LM358ADR
Texas Instruments
-
LM2904DGKR
Texas Instruments
-
LM324DR
Texas Instruments
-
MCP6006T-E/OT
Microchip Technology
-
MCP6006UT-E/OT
Microchip Technology
-
LM324PWR
Texas Instruments
-
LM2902PWR
Texas Instruments
-
LM2902DR
Texas Instruments
-
LM358P
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
