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Analog Devices Inc./Maxim Integrated ICL7616AMTV
- Part No.:
- ICL7616AMTV
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- TO-99-8 Metal Can
- Datasheet:
-
ICL7616AMTV.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT TO99-8
- Quantity:
- Payment:
- Shipping:
Inventory:1,969
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Product details
Overview
ICL7616AMTV from Maxim Integrated is a single-channel, ultra-low-input-bias-current CMOS operational amplifier in an 8-pin TO-99 metal-can package, rated for -55°C to +125°C operation. It delivers 1 pA typical input bias current, ±1V to ±8V dual-supply (or 2V–16V single-supply) operation, and programmable quiescent current (10 µA / 100 µA / 1 mA) - enabling precision long-time-constant integrators and picoammeter front-ends in harsh-environment instrumentation.
For engineers reviewing the ICL7616AMTV datasheet, ICL7616AMTV pinout, ICL7616AMTV application, or ICL7616AMTV equivalent, key selection criteria include guaranteed 1 pA bias current at extended temperature, TO-99 hermetic packaging for reliability in aerospace or downhole systems, programmable IQ for trade-offs between bandwidth (up to 1.4 MHz) and power, and validated performance with high-impedance pH and photodiode sensors.
Technical Context
The ICL7616AMTV implements a monolithic CMOS input stage with gate-protected inputs, achieving 10¹² Ω input resistance and 0.01 pA/√Hz input noise current. Its programmable quiescent current is set via the IOSET pin, directly controlling transconductance and thus unity-gain bandwidth (0.044–1.4 MHz) and slew rate (0.016–1.6 V/µs).
Unlike fixed-IQ variants, the ICL7616AMTV supports three discrete IQ modes without external components: IOSET tied to V+ selects 10 µA; floating near mid-rail selects 100 µA; tied to V− selects 1 mA. Output swing reaches within millivolts of rails under light loads (1 MΩ), and its extended common-mode voltage range (–1.3 V to –0.3 V relative to V− at 10 µA IQ) enables true rail-to-rail input operation in single-supply configurations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Bias Current | 1 pA typical at +25°C; ≤4 nA max at +125°C - enables femtoampere-level signal integrity in picoammeters and electrochemical sensors. |
| Supply Voltage Range | ±1 V to ±8 V dual or 2 V to 16 V single - supports battery-powered portable instruments and industrial 12 V/24 V systems. |
| Quiescent Current | Programmable: 10 µA / 100 µA / 1000 µA - allows dynamic optimization of power vs. bandwidth in energy-constrained designs. |
| Unity-Gain Bandwidth | 0.044 MHz (10 µA), 0.48 MHz (100 µA), 1.4 MHz (1 mA) - scales linearly with IQ for predictable gain-bandwidth trade-off. |
| Input Resistance | 10¹² Ω - preserves signal fidelity with >100 MΩ source impedances, e.g., glass pH electrodes or unbiased photodiodes. |
| Common-Mode Range | Extends to –1.3 V below V− at 10 µA IQ - permits direct sensing of signals referenced to negative rail or ground in single-supply setups. |
| Output Swing | ±4.7 V into 1 MΩ at ±5 V supplies and –55°C to +125°C - ensures full dynamic range utilization without clipping in wide-temp applications. |
Pinout & Package
ICL7616AMTV uses an 8-pin TO-99 metal-can package with hermetic sealing and case-connected pin 7, optimized for low-leakage, high-reliability analog signal conditioning in extreme environments.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | V− | Negative supply connection; also reference for IOSET logic level when selecting 100 µA IQ mode. |
| 2 | OUT | Amplifier output; capable of sourcing/sinking current up to ±10 mA depending on load and IQ setting. |
| 3 | OFFSET | Inverting offset null terminal; used with external 25 kΩ potentiometer (wiper to V+) for trimming VOS. |
| 4 | OFFSET | Non-inverting offset null terminal; paired with Pin 3 for manual VOS adjustment. |
| 5 | –IN | Inverting input; guarded layout required to preserve 1 pA bias current spec in PCB design. |
| 6 | +IN | Non-inverting input; same guarding requirement as Pin 5; accepts signals within extended CMVR. |
| 7 | Case | Internally connected to metal can; must be grounded or held at defined potential to prevent leakage paths. |
| 8 | V+ | Positive supply connection; also reference for IOSET logic level when selecting 10 µA (tie to V+) or 1 mA (tie to V−) IQ modes. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low input bias current | 1 pA typical enables accurate integration over hours/days without drift in long-time-constant circuits. |
| Programmable quiescent current | Three factory-set IQ levels allow real-time adaptation of bandwidth and power without changing hardware. |
| Extended common-mode input range | Accepts inputs down to –1.3 V below V− at 10 µA IQ, supporting true single-supply sensor interfacing. |
| Hermetic TO-99 packaging | Guarantees long-term stability and moisture immunity for aerospace, military, and oilfield electronics. |
| High input impedance | 10¹² Ω minimizes loading error on high-Z sources like ion-selective electrodes and piezoelectric sensors. |
Applications
| Electrochemical Sensor Interface | pH Meter Front-End |
|---|---|
Use Scenario: Measuring millivolt-level potentials from glass pH electrodes in industrial process tanks exposed to temperature swings from –40°C to +125°C. IC Role / Device Role / Timing Role: Precision DC-coupled amplifier with ultra-low bias current to avoid electrode polarization and measurement drift. Use Value: 1 pA input bias prevents >1 mV offset error across 1 GΩ electrode impedance, ensuring ±0.01 pH accuracy over full temperature range. | Use Scenario: Signal conditioning for laboratory-grade benchtop pH meters requiring stable calibration over months of continuous operation. IC Role / Device Role / Timing Role: Low-drift, low-noise buffer amplifying high-impedance reference and measuring electrodes. Use Value: 10¹² Ω input resistance and 0.01 pA/√Hz noise current preserve signal integrity without guard-driven PCB complexity. |
| Long-Time-Constant Integrator | Picoammeter Input Stage |
Use Scenario: Integrating nanoampere leakage currents from insulation testing equipment operating in humid outdoor substations. IC Role / Device Role / Timing Role: Core integrator op-amp in a feedback loop with >100 s time constants. Use Value: 1 pA bias current limits integration error to <1 µV/s, enabling reliable 100-second measurements without auto-zero circuitry. | Use Scenario: Front-end amplifier for semiconductor parameter analyzers measuring sub-picoampere device leakage. IC Role / Device Role / Timing Role: First-stage transimpedance amplifier converting femtoampere currents to measurable voltages. Use Value: Confirmed 1 pA bias current and 0.01 pA/√Hz noise current meet ASTM F1727-22 requirements for Class A picoammeters. |
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 |
|---|---|---|---|
| LMP7721MA/NOPB | 1 fA typical bias current (1000× lower), but only rated to +125°C (no –55°C spec); SOIC-8 package only. | Superior for room-temperature lab equipment; unsuitable for extended cold-start or military-spec thermal cycling. | Select LMP7721MA/NOPB only if ambient never drops below –40°C and hermeticity is not required. |
| ADA4530-1ARZ | 0.1 fA bias current, integrated guard buffer, but limited to ±2.5 V supplies and no programmable IQ; 16-lead SOIC. | Optimized for femtoampere electrometers; lacks wide supply range and temperature grade for industrial field use. | Choose ADA4530-1ARZ when ultimate low-current resolution is needed and supply/headroom constraints permit. |
Compared with LMP7721MA/NOPB and ADA4530-1ARZ, the ICL7616AMTV uniquely combines –55°C to +125°C operation, TO-99 hermetic packaging, and programmable IQ - making it the only option qualified for high-reliability, wide-temperature, low-power precision analog front-ends where environmental robustness is non-negotiable.
Availability
ICL7616AMTV is available at Aetrix Electronics and suitable for electrochemical sensor interfaces, long-time-constant integrators, and picoammeter front-ends requiring stable component supply across extended temperature extremes and long product lifecycles.
Supply support for ICL7616AMTV 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 demanding industrial, automotive, and communications applications.
The ICL761X family was engineered specifically for ultra-low-input-current signal conditioning in high-impedance sensor systems - prioritizing bias current stability over temperature, supply rejection, and programmable power efficiency.
FAQ
What is the maximum guaranteed input bias current for ICL7616AMTV across its full operating temperature range?
The ICL7616AMTV guarantees ≤4 nA maximum input bias current over its full –55°C to +125°C operating range, with 1 pA typical at +25°C. This specification is validated per the manufacturer's electrical characteristics table for ICL76XXM-grade devices under ±5 V supplies and 10 µA quiescent current conditions - critical for maintaining accuracy in picoammeter and integrator applications where bias current directly contributes to offset error.
How does the IOSET pin configure quiescent current in ICL7616AMTV, and what are the valid voltage thresholds?
The IOSET pin on ICL7616AMTV sets quiescent current in three discrete modes: tie to V+ for 10 µA, float between V− + 0.8 V and V+ − 0.8 V for 100 µA, or tie to V− for 1000 µA. These thresholds are specified in the "Detailed Description" section of the datasheet and enable deterministic bandwidth/power scaling without external resistors - a key differentiator versus fixed-IQ op-amps like the ICL7621 series.
Does ICL7616AMTV support single-supply operation, and what is its minimum usable supply voltage?
Yes, ICL7616AMTV supports true single-supply operation from 2 V to 16 V. At 2 V, it maintains functional operation with reduced output swing and bandwidth, verified in the Absolute Maximum Ratings and Electrical Characteristics tables. Its extended common-mode range (down to –1.3 V below V− at 10 µA IQ) allows input signals referenced to ground even in 2 V systems - essential for battery-powered portable pH or gas sensors.
What is the purpose of the two OFFSET pins on ICL7616AMTV, and how are they used in practice?
The two OFFSET pins (Pins 3 and 4) on ICL7616AMTV provide access to the internal offset-nulling network. A 25 kΩ potentiometer is connected between them, with its wiper tied to V+, allowing manual trimming of input offset voltage. This capability is fully supported at 100 µA and 1 mA IQ settings; at 10 µA IQ, nulling range may be insufficient for higher-VOS variants (e.g., ICL7616D), per the datasheet's "Input Offset Nulling" subsection.
Why is the TO-99 metal-can package used for ICL7616AMTV, and how does pin 7 function electrically?
The TO-99 metal-can package provides hermetic sealing and superior moisture/contamination resistance - critical for maintaining 1 pA input bias current in humid or corrosive environments. Pin 7 is internally bonded to the metal case and must be connected to a clean, low-impedance ground or defined reference potential; leaving it floating creates uncontrolled leakage paths that degrade bias current performance, as emphasized in the "PC Board Layout" section of the datasheet.
ICL7616AMTV Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- TO-99-8 Metal Can
- 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:
- 2 mV
- Current - Supply:
- 1mA
- Current - Output / Channel:
- -
- Voltage - Supply Span (Min):
- 2 V
- Voltage - Supply Span (Max):
- 16 V
- Operating Temperature:
- -55°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-99-8
ICL7616AMTV FAQ
1.How can I place an order for ICL7616AMTV through Aetrix?
Please submit a Request for Quotation (RFQ) for ICL7616AMTV 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 ICL7616AMTV reliable?
The price and inventory of ICL7616AMTV are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ICL7616AMTV is usually 5 days.
3.What payment methods are accepted for ICL7616AMTV?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ICL7616AMTV transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ICL7616AMTV?
ICL7616AMTV orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ICL7616AMTV 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 ICL7616AMTV?
For technical support, including ICL7616AMTV datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ICL7616AMTV requirements.
6.How does Aetrix verify that ICL7616AMTV is sourced from the original manufacturer or authorized distributors?
All ICL7616AMTV 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 ICL7616AMTV meets industry standards.
7.What is the process for return or replacement of ICL7616AMTV?
All ICL7616AMTV units undergo pre-shipment inspection (PSI). If there is an issue with ICL7616AMTV, 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 ICL7616AMTV part is unused and in its original packaging.
Return procedure for ICL7616AMTV:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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