MCP619-I/P - 190kHz Quad 2.3V Micropower Op Amp | Microchip
MPN: MCP619-I/P ✓ ActiveMCP619-I/P Overview
An operational amplifier, commonly called an op amp, is a high-gain analog building block that compares an input signal with a feedback reference and drives its output toward the difference between them. The MCP619 belongs to the hierarchy of operational amplifier, voltage-feedback amplifier, analog signal-conditioning IC, and power-management semiconductor. Its quad configuration integrates four amplifiers, reducing package count when a system needs multiple independent gain stages.
Key features include unity-gain stability, rail-to-rail output swing, low typical operating current of 19 µA, and a gain-bandwidth product of 190 kHz. The maximum input-offset voltage is 150 µV, while the stated input-offset current is 0.3 nA typical. According to the available manufacturer information, advanced CMOS technology provides low bias current, high open-loop gain, high-speed operation, and rail-to-rail output swing.
The 0.08 V/µs slew rate provides adequate signal-bandwidth performance for low-frequency instrumentation, sensor interfaces, and general-purpose analog conditioning. Noise is specified as 2.2 µV peak-to-peak to 10 Hz, and common-mode rejection reaches 100 dB in the supplied specification data. These characteristics suit precision-oriented designs where input offset, current draw, and usable output range are more important than high-speed operation.
Typical uses include battery-powered sensor acquisition, portable measurement equipment, low-voltage analog filtering, current sensing, and general-purpose buffering. Each of the four amplifier sections can perform voltage amplification, buffering, filtering, or comparison functions when supported by suitable feedback networks. The single-supply range also permits direct operation from 2.3 V, 3.3 V, or 5 V rails where appropriate system headroom is available.
Designers should verify input common-mode range, output swing under load, noise at the signal bandwidth of interest, and stability with the selected feedback network. Decoupling capacitors should be placed close to the supply pins, and unused amplifier inputs must not be left floating. Because the MCP619-I/P uses a through-hole PDIP-14 footprint, its replacement must match the same 14-pin package and pin arrangement.
This product page consolidates verified pricing, supply information, package details, operating characteristics, selection guidance, and engineering considerations. It also distinguishes verified same-family options from true drop-in alternatives, helping engineers avoid confusing a functional substitute with a PCB-compatible replacement.
Drop-in alternatives for MCP619-I/P — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
No drop-in alternatives available for this product.
Request AlternativesMCP619-I/P Maximum Ratings & Electrical Characteristics
| Amplifier Type | Quad operational amplifier |
| Number of Amplifiers | 4 units |
| Gain-Bandwidth Product | 190 kHz |
| Typical Operating Current | 19 µA |
| Supply Voltage Range | 2.3 V to 5.5 V |
| Maximum Input Offset Voltage | 150 µV |
| Slew Rate | 0.08 V/µs |
| Input Offset Current | 0.3 nA typical |
| Input Bias Current | -5 pA |
| Common-Mode Rejection Ratio | 100 dB |
| Noise Voltage | 2.2 µV peak-to-peak to 10 Hz typical |
| Output Swing | Rail-to-rail |
| Gain Stability | Unity-gain stable |
| Operating Temperature Range | -40 °C to +85 °C |
| Package | 14-pin PDIP |
| Mounting Type | Through-hole |
| Temperature Grade | Industrial |
| RoHS Status | Compliant |
| Lead-Free Status | Lead-free |
| Standard Lead Time | 8 weeks |
| Rail-to-Rail Output | Yes |
MCP619-I/P 14-pin pdip Pin Configuration Guide
Pin configuration for MCP619-I/P (14-pin pdip package). This analog component features input, output, and power supply pins. Refer to the manufacturer datasheet for offset null, compensation, and enable pin configurations. Ideal for signal conditioning and amplifier circuits.
No detailed pinout data available for MCP619-I/P.
Refer to the datasheet for full pin configuration.
Typical Applications
MCP619-I/P is suitable for 6 applications: Battery-Powered Sensor Acquisition, Portable Measurement Equipment, Low-Voltage Current Sensing, Industrial Process Monitoring, Precision Active Filtering, Low-Power Buffering and Level Conditioning.
Battery-Powered Sensor Acquisition
The MCP619-I/P fits low-voltage sensor front ends because its four amplifier channels operate from 2.3 V to 5.5 V while drawing 19 µA typical operating current. The 190 kHz gain-bandwidth product supports moderate-bandwidth conditioning rather than high-speed waveform capture, while the maximum 150 µV input-offset voltage helps preserve small sensor signals. A typical implementation places the amplifier between a resistive sensor network and an ADC, using the four sections for gain, buffering, filtering, and biasing. The tradeoff is limited bandwidth, so applications requiring rapid settling should select a faster amplifier.
Recommended
Portable Measurement Equipment
The MCP619-I/P is appropriate for compact, battery-operated instruments that need several low-power analog functions without relying on a higher-current general-purpose amplifier. Its 19 µA typical operating current and 2.3 V minimum supply support low-energy operation, and the four amplifiers can implement input conditioning, active filtering, and output buffering. The 0.08 V/µs slew rate favors low-frequency or precision-oriented signals rather than fast pulses. Engineers should still budget for sensor excitation, references, and conversion circuitry when estimating complete-system power consumption.
Recommended
Low-Voltage Current Sensing
The MCP619-I/P can amplify the small voltage produced by a low-side current shunt in a 2.3 V to 5.5 V system. Its low typical operating current of 19 µA minimizes interference with battery-powered monitoring, and rail-to-rail output operation increases usable signal range near the supply rails. The amplifier is unity-gain stable, permitting a straightforward non-inverting or inverting gain stage when the feedback network is selected correctly. Offset voltage and input-bias-current errors must be checked against shunt resistance and sensor sensitivity, while the 190 kHz bandwidth limits how quickly transients can be followed.
Recommended
Industrial Process Monitoring
The MCP619-I/P is suitable for industrial process-monitoring modules that condition low-level analog inputs while operating from a compact low-voltage supply. Its industrial temperature grade of -40 °C to +85 °C, 100 dB stated common-mode rejection, and 150 µV maximum offset voltage support precision-oriented measurement channels. The four integrated amplifiers can provide gain, active filtering, buffering, and level conditioning. Designers should verify the actual common-mode and output ranges in the manufacturer documentation, avoid relying on the rail-to-rail output statement as a guarantee of input swing, and provide local decoupling for reliable operation.
Recommended
Precision Active Filtering
The MCP619-I/P can implement active low-pass, high-pass, or other feedback-based analog filters where 190 kHz gain-bandwidth and 0.08 V/µs slew rate are sufficient. Its 19 µA typical operating current supports low-power filter nodes, and the 14-pin PDIP package simplifies through-hole prototyping and repair. Because closed-loop bandwidth, phase margin, noise, and output drive depend on the selected resistor and capacitor values, the same MCP619 stability and electrical characteristics should be checked against the intended topology. At high Q or high gain, verify phase margin and output-voltage limits in the manufacturer data.
Recommended
Low-Power Buffering and Level Conditioning
The MCP619-I/P provides four unity-gain-stable channels for buffering high-impedance sources and conditioning logic-level signals in low-voltage systems. Rail-to-rail output swing provides more usable output range than a fixed-rail implementation, and the 19 µA typical operating current helps limit power use in portable equipment. A practical design can use one channel to amplify a sensor output, one to provide gain, one as an active filter, and one to buffer a reference or ADC input. Input bias current must be considered for very high source impedances, and unused inputs should be tied to a defined potential rather than left floating.
Recommended
Recommended Products Summary
Engineering reference data for MCP619-I/P — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product |
|---|---|
| Brand | Microchip Technology |
| Package | 14-pin PDIP |
| Amplifier Configuration | Quad |
| Supply Voltage Range | 2.3 V to 5.5 V |
| Gain-Bandwidth Product | 190 kHz |
| Typical Operating Current | 19 µA |
| Maximum Input Offset Voltage | 150 µV |
| Slew Rate | 0.08 V/µs |
| Input Offset Current | 0.3 nA typical |
| Common-Mode Rejection Ratio | 100 dB |
| Output Swing | Rail-to-rail |
| Operating Temperature Range | -40 °C to +85 °C |
Key Differentiators
- Combines four amplifiers in one micropower package (vs LM324D)
- Supports low-voltage single-supply operation (vs LM324D)
- Precision-oriented offset and noise ratings (vs MCP616-I/SN)
Design Notes
The stated 19 µA operating current applies to the amplifier device under the manufacturer's specified conditions, not necessarily to the complete application. Estimate the total current by adding sensor excitation, reference, bias-network, ADC, and load currents. Place the bypass capacitor close to the supply pins and route ground returns directly to the device ground to reduce supply noise and prevent the amplifier from responding to shared-impedance disturbances.
Keep each amplifier's feedback resistors and compensation components close to the corresponding input and output pins to minimize parasitic capacitance and board noise. Do not leave unused amplifier inputs floating; terminate them at a valid common-mode potential. Because the MCP619-I/P is a 14-pin PDIP, verify the official numbered pin diagram before connecting signals, particularly if a related surface-mount family member is being considered for a redesign.
Rail-to-rail output does not mean the input common-mode range or output swing is guaranteed under every load condition. Check the manufacturer limits for input common-mode voltage, output current, capacitive loading, and operating temperature. Also avoid assuming that any similarly packaged amplifier is a drop-in replacement: package outlines, pin functions, offset behavior, bias current, slew rate, and stability must all be confirmed before substitution.
The 190 kHz gain-bandwidth product is suitable for low-frequency precision conditioning, not high-speed signal processing. At high closed-loop gain, verify gain-bandwidth distribution, output-noise contribution, and phase margin for the selected feedback network. Sensitive measurements should also account for 150 µV maximum offset, 0.3 nA typical input-offset current, and the 2.2 µV peak-to-peak noise figure quoted to 10 Hz.
Compliance Information
The verified FindIC listing identifies MCP619-I/P as RoHS compliant and lead-free. No verified REACH, halogen-free, AEC-Q100, or conflict-minerals declaration was supplied.