Analog Devices Inc./Maxim Integrated ICL7616DCPA

Overview

ICL7616DCPA from Maxim Integrated is a single-channel, ultra-low-input-bias-current CMOS operational amplifier with programmable quiescent current (10 µA / 100 µA / 1000 µA), ±1 V to ±8 V dual-supply or 2 V to 16 V single-supply operation, and 1 pA typical input bias current. It features extended common-mode voltage range down to V− (–1.3 V at IQ = 10 µA), rail-to-rail output swing within millivolts of supply rails, and is optimized for pH meters, photodiode amplifiers, and low-droop sample/hold circuits.

For engineers reviewing the ICL7616DCPA datasheet, ICL7616DCPA pinout, ICL7616DCPA application, or ICL7616DCPA equivalent, key selection criteria include confirmed 1 pA input bias current, programmable IQ with corresponding GBW scaling (0.044–1.4 MHz), extended CMVR enabling true single-supply sensor interfacing, and 8-pin PDIP package compatibility with industry-standard layouts.

Technical Context

The ICL7616DCPA implements a monolithic CMOS input stage with 10¹² Ω input impedance and 0.01 pA/√Hz input noise current, enabling stable operation with high-impedance sources like photodiodes and glass electrodes. Its extended common-mode range (–1.3 V to +3.7 V at ±5 V supplies, IQ = 10 µA) supports direct connection to sensors referenced to V− or ground in single-supply systems.

Quiescent current is set via external voltage on the IOSET pin: V+ selects 10 µA, mid-supply selects 100 µA, and V− selects 1 mA - directly scaling unity-gain bandwidth (0.044 MHz → 1.4 MHz), slew rate (0.016 V/µs → 1.6 V/µs), and output drive capability while preserving rail-to-rail output swing and low offset drift (10 µV/°C typical).

Key Specifications

Pinout & Package

ICL7616DCPA is housed in an 8-pin plastic DIP (PDIP) package with industry-standard pinout and case-isolated construction (pin 7 connected to metal can). The package supports through-hole mounting and meets JEDEC MS-001 standards.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar ultra-low-bias-current op amp applications.

Compared with LTC1050CN8#PBF and TLC27L1CP, the ICL7616DCPA uniquely combines programmable ultra-low IQ (10–1000 µA), extended CMVR including V−, and 8-pin PDIP packaging - making it the only option for battery-powered, grounded-sensor, and power-scalable precision analog front-ends.

Availability

ICL7616DCPA is available at Aetrix Electronics and suitable for pH meter manufacturing, photodiode-based environmental sensing, and low-power portable instrumentation requiring stable component supply across extended temperature and long production lifecycles.

Supply support for ICL7616DCPA 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 communications applications.

The ICL761X family was designed specifically for ultra-low-leakage, wide-supply, battery-operated precision signal conditioning - targeting applications where input bias current, supply flexibility, and long-term stability outweigh raw speed or zero-drift performance.

FAQ

What is the maximum allowable supply voltage for ICL7616DCPA?

The absolute maximum total supply voltage (V+ to V−) for ICL7616DCPA is +18 V. Operation is specified from ±1 V to ±8 V dual supply or 2 V to 16 V single supply. Exceeding +18 V risks permanent damage, and operation near absolute maximum ratings may reduce reliability over time. Always observe derating curves for continuous power dissipation in the 8-pin PDIP package.

Does ICL7616DCPA support true single-supply operation with input signals at ground?

Yes, ICL7616DCPA supports true single-supply operation with inputs at ground due to its extended common-mode voltage range. At ±5 V supplies and IQ = 10 µA, the input common-mode range extends to –1.3 V - meaning it accepts signals at 0 V (ground) when V− = 0 V. This enables direct interfacing with grounded-referenced sensors like pH electrodes and thermistors without level-shifting circuitry.

How is quiescent current programmed on ICL7616DCPA?

Quiescent current on ICL7616DCPA is programmed via the IOSET pin (pin 5): connect to V+ for 10 µA, apply a voltage between V− + 0.8 V and V+ – 0.8 V for 100 µA, or connect to V− for 1000 µA. This selection scales unity-gain bandwidth, slew rate, and output drive while preserving rail-to-rail output swing and low-offset performance - enabling one hardware design to serve multiple power/performance tiers.

Can ICL7616DCPA drive capacitive loads?

ICL7616DCPA is not optimized for direct capacitive loading. Avoid capacitive loads >100 pF without isolation resistance, as they risk instability and peaking. For larger loads (e.g., ADC input capacitors), use a series resistor (≥100 Ω) between output and capacitor. Very large capacitive loads (>10 µF) may stabilize the output due to dominant-pole formation, but this degrades transient response and is not recommended for precision timing applications.

Is external offset nulling supported on ICL7616DCPA?

Yes, ICL7616DCPA provides dedicated OFFSET pins (pins 1 and 8) for external nulling. Connect a 25 kΩ potentiometer between these pins with the wiper tied to V+. Nulling range is sufficient for all V_OS grades at IQ = 100 µA or 1 mA; at IQ = 10 µA, nulling may not correct the full 15 mV max V_OS (D-grade), so verify residual offset in final circuit conditions.