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Analog Devices Inc./Maxim Integrated ICL7614DCSA
- Part No.:
- ICL7614DCSA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ICL7614DCSA.pdf
- Description:
- IC OPAMP LP CMOS 8-SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:352
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Product details
Overview
ICL7614DCSA from Maxim Integrated is a single, externally compensated, ultra-low-input-bias-current CMOS operational amplifier with pin-selectable quiescent current (10 μA / 100 μA / 1 mA), ±1 V to ±8 V dual-supply operation (or 2–16 V single supply), 1 pA typical input bias current at +25°C, and rail-to-rail output swing within millivolts of supply rails - ideal for pH meter front-ends and photodiode transimpedance amplifiers.
For engineers reviewing the ICL7614DCSA datasheet, ICL7614DCSA pinout, ICL7614DCSA application, or ICL7614DCSA equivalent, this page delivers verified electrical specifications, SO-8 package terminal mapping, low-leakage design context, and validated alternative options for battery-powered instrumentation and high-impedance sensor signal conditioning.
Technical Context
The ICL7614DCSA implements external frequency compensation via a capacitor between COMP (Pin 6) and OUT (Pin 1), enabling bandwidth optimization beyond unity-gain stability - unlike internally compensated variants (e.g., ICL7611/7612). Its programmable IQ pin (Pin 7) sets quiescent current by voltage level relative to V+ and V−, directly scaling slew rate (0.016–1.6 V/µs), unity-gain bandwidth (0.044–1.4 MHz), and output sink capability while preserving rail-to-rail output swing.
Designed for ultra-high-source-impedance interfaces, it features 10¹² Ω input resistance, 0.01 pA/√Hz input noise current, and guaranteed ≤4 nA max input bias current at +125°C - enabling stable long-time-constant integration and sub-picoampere current measurement without guard-ring PCB layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Bias Current | 1 pA typical at +25°C; enables picoammeter-grade leakage performance in high-Z sensor circuits |
| Supply Voltage Range | ±1 V to ±8 V dual or 2–16 V single; supports coin-cell (3 V) and industrial (±5 V) rails |
| Quiescent Current | Programmable: 10 μA / 100 μA / 1 mA via IQ pin; trades power vs. bandwidth/slew rate |
| Output Swing | Rail-to-rail: ±4.9 V into 1 MΩ at ±5 V supply; minimizes headroom loss in low-voltage systems |
| Unity-Gain Bandwidth | 0.044 MHz (at 10 μA), 0.48 MHz (at 100 μA), 1.4 MHz (at 1 mA); scalable for precision vs. speed |
| Input Noise Current | 0.01 pA/√Hz at 1 kHz; critical for photodiode and ion-selective electrode amplification |
| Input Resistance | 10¹² Ω; ensures minimal loading on >100 MΩ source impedances (e.g., glass pH electrodes) |
Pinout & Package
ICL7614DCSA is housed in an 8-pin Small Outline (SO) package (SA code), 3.9 mm × 4.9 mm body, 1.27 mm pitch, JEDEC MS-012 compliant, RoHS-compliant lead-free finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT) | Amplifier Output | CMOS rail-to-rail output stage; drives ≥1 MΩ loads with <2 mV saturation margin |
| 2 (–IN) | Inverting Input | High-impedance node; connects to feedback network in transimpedance or inverting configurations |
| 3 (+IN) | Non-Inverting Input | Ultra-low-leakage input; used for reference biasing or high-Z sensor connection |
| 4 (V–) | Negative Supply | Accepts –1 V to –8 V; must be decoupled locally for low-noise operation |
| 5 (OFFSET) | Offset Null (1) | Connects to 25 kΩ pot wiper; nulls input offset voltage (15 mV max) when IQ ≥ 100 μA |
| 6 (COMP) | Compensation Node | External capacitor (≥39 pF) to OUT sets dominant pole; enables bandwidth tuning beyond unity gain |
| 7 (IOSET) | Quiescent Current Control | Voltage level selects IQ: V+ → 10 μA, mid-rail → 100 μA, V– → 1 mA |
| 8 (V+) | Positive Supply | Accepts +1 V to +8 V; supplies both input and output stages; requires local 0.1 μF bypass |
Key Features
| Feature | Design Value |
|---|---|
| Externally Compensated Architecture | Enables bandwidth optimization beyond unity-gain stability; supports gains <1 only with external capacitor |
| Programmable Quiescent Current | Three discrete IQ settings allow precise trade-off between battery life (10 μA) and dynamic response (1 mA) |
| Rail-to-Rail Output Swing | Delivers full dynamic range from ±0.02 V of supply rails - maximizes ADC utilization in low-voltage systems |
| 10¹² Ω Input Resistance | Prevents signal attenuation in >100 MΩ source impedance applications (e.g., electrochemical sensors) |
| 0.01 pA/√Hz Input Noise Current | Minimizes current noise contribution in photodiode TIA designs where shot noise dominates |
Applications
| pH Meter Front-End | Photodiode Transimpedance Amplifier |
|---|---|
Use Scenario: High-impedance glass electrode (≥100 MΩ) measuring H⁺ ion activity in aqueous solution. IC Role / Device Role / Timing Role: Ultra-low-bias-current buffer and DC-coupled amplifier with offset nulling for drift compensation. Use Value: 1 pA input bias prevents electrode polarization error; 15 mV max VOS is nulled via external potentiometer. | Use Scenario: Converting weak photocurrent (pA–nA) from silicon PIN diode into measurable voltage. IC Role / Device Role / Timing Role: Transimpedance amplifier with programmable bandwidth (via COMP pin) and ultra-low input current noise. Use Value: 0.01 pA/√Hz noise current avoids degrading SNR; rail-to-rail output maximizes dynamic range into 16-bit ADC. |
| Low-Droop Sample/Hold Circuit | Picoammeter Input Stage |
Use Scenario: Holding analog voltage for extended periods (>1 s) in portable multimeters or data loggers. IC Role / Device Role / Timing Role: Unity-gain follower with ultra-low input bias current to minimize hold capacitor discharge. Use Value: 1 pA bias current limits droop to <1 mV/s on 1 nF hold capacitor - enabling >100 s hold time. | Use Scenario: Measuring leakage currents in semiconductor device characterization or insulation testing. IC Role / Device Role / Timing Role: Precision current-to-voltage converter with guarded input and programmable gain. Use Value: Guaranteed ≤4 nA max input bias at +125°C ensures sub-pA accuracy; 10¹² Ω RIN prevents shunt path errors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultra-low-bias-current op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TLC27L1CD | Fixed 10 μA IQ; no external compensation; 25 mV max VOS; 10¹³ Ω RIN; same SO-8 package | Lacks programmable bandwidth and offset null; lower VOS grade unavailable | Select when fixed low-power operation suffices and external compensation is unnecessary |
| OPA377AIDBVR | Fixed 760 μA IQ; internal compensation; 0.5 mV max VOS; 10⁶ Ω RIN; 3 MHz GBW; same SOT-23-5 footprint | Higher bias current (0.2 pA typ) but superior DC precision; incompatible pinout and compensation scheme | Select for higher-speed, lower-offset applications where input impedance >10⁹ Ω is acceptable |
Compared with TLC27L1CD and OPA377AIDBVR, the ICL7614DCSA uniquely combines externally adjustable bandwidth, three-tier quiescent current selection, and guaranteed sub-pA bias current in an industry-standard SO-8 package - making it irreplaceable for long-time-constant integrators and electrochemical sensor interfaces requiring both ultra-low leakage and tunable dynamics.
Availability
ICL7614DCSA is available at Aetrix Electronics and suitable for battery-powered instruments, low-leakage amplifiers, and long-time constant integrators requiring stable component supply across industrial and medical OEM programs.
Supply support for ICL7614DCSA 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 ICL761X family was engineered specifically for ultra-high-input-impedance, low-power signal conditioning - targeting pH meters, photodiode amplifiers, and picoammeters where femtoampere-level leakage would corrupt measurement integrity.
FAQ
What is the function of Pin 6 (COMP) on the ICL7614DCSA?
Pin 6 (COMP) on the ICL7614DCSA is the external frequency compensation terminal. A capacitor (≥39 pF) must be connected between Pin 6 and Pin 1 (OUT) to stabilize the amplifier. Unlike internally compensated variants (e.g., ICL7611), this allows bandwidth and slew rate optimization for non-unity-gain configurations. The ICL7614DCSA datasheet specifies 39 pF for unity-gain stability; reducing capacitance increases bandwidth at the cost of phase margin.
Does the ICL7614DCSA support single-supply operation?
Yes, the ICL7614DCSA supports single-supply operation from 2 V to 16 V. Its input common-mode range extends to within 0.4 V of V– and 0.6 V of V+, and its rail-to-rail output swings to within millivolts of both supply rails. For single-supply use, bias the non-inverting input at mid-rail (e.g., using resistor divider) and ensure the IOSET (Pin 7) voltage is referenced correctly to set desired quiescent current.
How is quiescent current selected on the ICL7614DCSA?
Quiescent current on the ICL7614DCSA is selected via voltage applied to Pin 7 (IOSET): connect to V+ for 10 μA, to a mid-rail voltage (V– + 0.8 V to V+ − 0.8 V) for 100 μA, or to V– for 1 mA. This selection directly scales unity-gain bandwidth (0.044–1.4 MHz), slew rate (0.016–1.6 V/µs), and output sink current - enabling adaptive power/performance tuning in the ICL7614DCSA design.
Can the ICL7614DCSA be used in a picoammeter design?
Yes, the ICL7614DCSA is explicitly suited for picoammeter input stages due to its 1 pA typical input bias current (≤4 nA max at +125°C), 10¹² Ω input resistance, and 0.01 pA/√Hz input noise current. When configured as a transimpedance amplifier with guarded PCB layout and low-leakage feedback resistor, the ICL7614DCSA achieves sub-picoampere resolution - matching the requirements stated in its Applications list and General Description.
What is the maximum operating temperature range for the ICL7614DCSA?
ICL7614DCSA is rated for 0°C to +70°C (C temperature grade), as indicated by the "C" in its ordering code (ICL7614DCSA: D = 15 mV VOS max, C = 0°C to +70°C, SA = Small SO). It is not rated for extended industrial (–40°C to +85°C) or military (–55°C to +125°C) ranges - those require suffixes "E" or "M", respectively, such as ICL7614DESA or ICL7614DMTV.
ICL7614DCSA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- *
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 0.016V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- -
- Current - Input Bias:
- -
- Voltage - Input Offset:
- -
- Current - Supply:
- -
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- -
- Voltage - Supply Span (Max):
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
ICL7614DCSA FAQ
1.How can I place an order for ICL7614DCSA through Aetrix?
Please submit a Request for Quotation (RFQ) for ICL7614DCSA 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 ICL7614DCSA reliable?
The price and inventory of ICL7614DCSA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ICL7614DCSA is usually 5 days.
3.What payment methods are accepted for ICL7614DCSA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ICL7614DCSA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ICL7614DCSA?
ICL7614DCSA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ICL7614DCSA 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 ICL7614DCSA?
For technical support, including ICL7614DCSA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ICL7614DCSA requirements.
6.How does Aetrix verify that ICL7614DCSA is sourced from the original manufacturer or authorized distributors?
All ICL7614DCSA 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 ICL7614DCSA meets industry standards.
7.What is the process for return or replacement of ICL7614DCSA?
All ICL7614DCSA units undergo pre-shipment inspection (PSI). If there is an issue with ICL7614DCSA, 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 ICL7614DCSA part is unused and in its original packaging.
Return procedure for ICL7614DCSA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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