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Analog Devices Inc./Maxim Integrated ICL7616ACSA
- Part No.:
- ICL7616ACSA
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ICL7616ACSA.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,307
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Product details
Overview
ICL7616ACSA from Maxim Integrated is a single, 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 extended common-mode voltage range down to –1.3 V at IQ = 10 μA - optimized for pH meter front-ends and photodiode amplifiers requiring femtoamp-level leakage control.
For engineers reviewing the ICL7616ACSA datasheet, ICL7616ACSA pinout, ICL7616ACSA application, or ICL7616ACSA equivalent, this page delivers verified package mapping (8-pin SOIC), confirmed pin functions (including IOSET, OFFSET, and extended VCMR behavior), real-world performance trade-offs across IQ settings, and two validated alternative op amps for low-leakage signal conditioning designs.
Technical Context
The ICL7616ACSA implements a monolithic CMOS input stage with 10¹² Ω input impedance and programmable quiescent current via the IOSET pin, enabling direct trade-off between power (10 μA min) and bandwidth (up to 1.4 MHz at 1 mA). Its extended common-mode input range (–1.3 V to +3.7 V at IQ = 10 μA on ±5 V supplies) supports rail-to-rail sensing in battery-powered instrumentation.
Unlike fixed-IQ variants (e.g., ICL7612), the ICL7616ACSA's IOSET pin allows dynamic IQ selection without external resistors - connecting IOSET to V+ sets 10 μA, to mid-supply sets 100 μA, and to V– sets 1 mA - directly scaling slew rate (0.016–1.6 V/µs), unity-gain bandwidth (0.044–1.4 MHz), and output sink capability while preserving CMRR ≥ 70 dB and PSRR ≥ 70 dB across all modes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Bias Current | 1 pA typical at +25°C - enables picoampere-level current measurement in photodiode and ion-sensor circuits without significant error. |
| Supply Voltage Range | ±1 V to ±8 V dual or 2–16 V single - supports operation from coin-cell (3 V) to industrial rails (15 V) without level-shifting. |
| Quiescent Current | Pin-selectable: 10 μA / 100 μA / 1 mA - lets designers optimize battery life vs. bandwidth in portable medical and test equipment. |
| Common-Mode Range | –1.3 V to +3.7 V at IQ = 10 μA (±5 V supply) - permits direct interface to transducers operating below ground reference. |
| Input Impedance | 10¹² Ω - preserves signal integrity when driving high-Z sources like glass pH electrodes or piezoelectric sensors. |
| Output Swing | ±4.8 V into 1 MΩ at +25°C (±5 V supply) - delivers >96% rail-to-rail swing for maximum dynamic range in low-voltage systems. |
| Unity-Gain Bandwidth | 0.044 MHz at 10 μA, up to 1.4 MHz at 1 mA - enables stable DC-coupled gain stages or low-frequency active filters with configurable speed. |
Pinout & Package
ICL7616ACSA 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, with gull-wing leads and Pb-free finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OFFSET | Offset null connection point - used with external 25 kΩ potentiometer (wiper to V+) to trim input offset voltage. |
| 2 | IN– | Inverting input - high-impedance CMOS node; requires guarded layout to preserve 1 pA bias current spec. |
| 3 | IN+ | Non-inverting input - symmetrical to IN–; matched input capacitance supports balanced sensor interfaces. |
| 4 | V– | Negative supply rail - must be decoupled locally; supports operation down to –1 V (no reverse polarity protection). |
| 5 | IOSET | Quiescent current select - tie to V+ for 10 μA, mid-supply for 100 μA, or V– for 1 mA; no pull-up/down required. |
| 6 | OUTPUT | Amplifier output - CMOS push-pull stage capable of ±4.8 V swing into 1 MΩ; sink current scales with IQ. |
| 7 | V+ | Positive supply rail - accepts up to +8 V; internal ESD protection clamps to ±0.3 V beyond rails. |
| 8 | OFFSET | Second offset null terminal - completes nulling network; unused pins must remain unconnected or grounded. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low input bias current | 1 pA typical enables accurate integration over hours in long-time-constant circuits without drift. |
| Programmable quiescent current | Three discrete IQ settings allow one BOM item to serve multiple power/bandwidth tiers in production. |
| Extended common-mode input range | –1.3 V at IQ = 10 μA permits direct connection to negative-output transducers (e.g., thermocouples with cold-junction compensation). |
| High input impedance | 10¹² Ω minimizes loading on high-Z sources such as electrochemical sensors and capacitive microphones. |
| Low input noise current | 0.01 pA/√Hz ensures minimal current-noise contribution in photodiode TIA configurations at 1 kHz. |
Applications
| pH Meter Front-End | Photodiode Transimpedance Amplifier |
|---|---|
Use Scenario: High-impedance glass electrode (≥10⁹ Ω) measuring H⁺ ion concentration in aqueous solution. IC Role / Device Role / Timing Role: Precision DC-coupled buffer and offset-compensated amplifier with sub-picoamp input leakage. Use Value: 1 pA bias current prevents electrode polarization and measurement drift over minutes to hours. | Use Scenario: Converting nanoampere photocurrent from silicon PIN diode into measurable voltage under low-light conditions. IC Role / Device Role / Timing Role: Low-noise, high-Z transimpedance amplifier with programmable bandwidth for signal-to-noise optimization. Use Value: 0.01 pA/√Hz noise current and 10¹² Ω input resistance maximize dynamic range in 0.1–100 Hz optical sensing. |
| Low-Droop Sample/Hold Amplifier | Picoammeter Input Stage |
Use Scenario: Holding analog voltage from precision ADC driver during conversion cycle in portable DMMs. IC Role / Device Role / Timing Role: Unity-gain follower with ultra-low input current to minimize hold capacitor discharge. Use Value: <10 fA/s droop rate achievable with 1 nF hold capacitor, enabling >10-second hold times at 16-bit accuracy. | Use Scenario: Measuring leakage current through insulating materials or semiconductor junctions in reliability testing. IC Role / Device Role / Timing Role: Femtoampere-class current-to-voltage converter with guarded input and offset trimming. Use Value: Verified 1 pA bias current and 300 pA max over 0–70°C allows calibrated picoampere resolution without guard-ring PCB complexity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ultra-low-input-bias-current op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC1050CS8#PBF | Zero-drift chopper architecture; 0.01 µV/°C offset drift vs. ICL7616ACSA's 10 µV/°C; higher supply current (170 µA typ) | Better DC stability in temperature-varying environments; unsuitable for >10 kHz signal paths due to chopping artifacts | Select when long-term offset drift dominates noise; avoid where wideband AC response is needed. |
| TLC27L7CP | Single-supply only (3–16 V); 0.6 pA bias current (typ); no IOSET pin - fixed 10 µA IQ; lower CMRR (70 dB min) | Lower cost for fixed-power, single-rail battery instruments; lacks extended VCMR and programmability | Select for cost-sensitive, single-supply pH meters where IQ flexibility and negative input range are not required. |
Compared with LTC1050CS8#PBF and TLC27L7CP, the ICL7616ACSA uniquely combines programmable IQ, extended negative common-mode range, and industry-standard SOIC pinout - making it the only choice for dual-supply, multi-tier power designs requiring both picoampere fidelity and field-configurable bandwidth.
Availability
ICL7616ACSA is available at Aetrix Electronics and suitable for pH meter front-ends, photodiode transimpedance amplifiers, low-droop sample/hold circuits, and picoammeter input stages requiring stable component supply across industrial and medical OEM programs.
Supply support for ICL7616ACSA 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 ICL761X family was engineered specifically for ultra-low-leakage, low-power signal conditioning - targeting electrochemical sensors, photodetection, and portable instrumentation where femtoampere-level input integrity is non-negotiable.
FAQ
What is the maximum supply voltage rating for the ICL7616ACSA?
The ICL7616ACSA has an absolute maximum total supply voltage (V+ to V–) of +18 V. It operates across a wide range: ±1 V to ±8 V dual supply or 2 V to 16 V single supply. Exceeding ±8 V on either rail risks violating the input voltage limit of (V+ + 0.3 V) to (V– – 0.3 V), so the ICL7616ACSA must be used within these bounds for reliable operation.
How does the IOSET pin configure quiescent current in the ICL7616ACSA?
The IOSET pin on the ICL7616ACSA selects quiescent current by voltage level: connect to V+ for 10 μA, to a mid-supply voltage (between V– + 0.8 V and V+ – 0.8 V) for 100 μA, or to V– for 1 mA. This direct pin control eliminates external resistors and enables runtime reconfiguration - a key differentiator of the ICL7616ACSA versus fixed-IQ op amps in its family.
Can the ICL7616ACSA drive a 10 kΩ load while maintaining rail-to-rail output swing?
At IQ = 1 mA, the ICL7616ACSA delivers ±4.3 V output swing into 10 kΩ at 0–70°C (±5 V supply), achieving ~86% rail-to-rail. At lower IQ settings, swing degrades: ±4.8 V at 100 μA (100 kΩ load) and ±4.8 V at 10 μA (1 MΩ load). So the ICL7616ACSA can drive 10 kΩ only at 1 mA IQ - confirming its design trade-off between power and drive strength.
What is the guaranteed input offset voltage specification for the ICL7616ACSA over temperature?
The ICL7616ACSA ('A' grade) guarantees input offset voltage ≤ 3 mV over the full 0°C to +70°C operating range. At +25°C, it is specified at 2 mV max. The temperature coefficient is 10 µV/°C typical, meaning worst-case drift adds ≤ 0.7 mV across the range - well within the 3 mV limit. This is confirmed in the Electrical Characteristics table on page 4 of the datasheet.
Does the ICL7616ACSA require external frequency compensation?
No - the ICL7616ACSA is internally compensated for unity-gain stability and requires no external capacitor. Unlike the ICL7614 (which uses external compensation between COMP and OUT), the ICL7616ACSA's compensation is monolithic and fixed. This simplifies layout and eliminates tuning, making the ICL7616ACSA suitable for standard gain-of-one or inverting configurations without risk of oscillation.
ICL7616ACSA 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:
- Rail-to-Rail
- Slew Rate:
- 1.6V/µs
- Gain Bandwidth Product:
- 1.4 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 1 pA
- Voltage - Input Offset:
- 2 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:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
ICL7616ACSA FAQ
1.How can I place an order for ICL7616ACSA through Aetrix?
Please submit a Request for Quotation (RFQ) for ICL7616ACSA 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 ICL7616ACSA reliable?
The price and inventory of ICL7616ACSA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ICL7616ACSA is usually 5 days.
3.What payment methods are accepted for ICL7616ACSA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ICL7616ACSA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ICL7616ACSA?
ICL7616ACSA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ICL7616ACSA 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 ICL7616ACSA?
For technical support, including ICL7616ACSA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ICL7616ACSA requirements.
6.How does Aetrix verify that ICL7616ACSA is sourced from the original manufacturer or authorized distributors?
All ICL7616ACSA 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 ICL7616ACSA meets industry standards.
7.What is the process for return or replacement of ICL7616ACSA?
All ICL7616ACSA units undergo pre-shipment inspection (PSI). If there is an issue with ICL7616ACSA, 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 ICL7616ACSA part is unused and in its original packaging.
Return procedure for ICL7616ACSA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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