Operational Amplifier Circuit

Product Specifications

Technical details and manufacturing context for Operational Amplifier Circuit

Definition

An operational amplifier circuit is a specialized electronic circuit that employs operational amplifiers (op-amps) to perform signal conditioning functions such as amplification, filtering, integration, differentiation, or buffering. It is typically implemented on a printed circuit board (PCB) as part of a larger signal conditioning system, preparing analog signals for further processing or measurement. The circuit configuration, including external resistors and capacitors, determines the gain, bandwidth, and frequency response. Op-amps are high-gain voltage amplifiers with differential inputs; they amplify the voltage difference between their input terminals. Common configurations include inverting, non-inverting, and differential amplifiers. The circuit may be built using discrete op-amp integrated circuits (ICs) or integrated into a larger IC. Materials typically include silicon (for the op-amp IC), FR-4 (PCB substrate), copper (traces), and solder. Key parameters to consider when selecting or verifying an operational amplifier circuit include supply voltage (typically ±2.5 to ±18 V DC, with single supply up to 36 V), input offset voltage (0.1–5 mV), input bias current (1–500 nA), gain bandwidth product (1–100 MHz), slew rate (0.5–20 V/µs), operating temperature range (-40 to 85°C, industrial grade), input voltage range (0 to Vcc-1.5 V), output voltage swing (0.1 to Vcc-0.1 V), common mode rejection ratio (70–120 dB), power supply rejection ratio (80–120 dB), package type (e.g., SOT-23-5, SOIC-8, DIP-8, QFN), and weight (0.01–0.5 g). These values are typical ranges; actual specifications depend on the specific op-amp model and circuit design. Always verify model-specific values and standards with the legal manufacturer or supplier before procurement or use.

Working Principle

Operational amplifiers (op-amps) are high-gain voltage amplifiers with differential inputs. In a circuit configuration (e.g., inverting, non-inverting, differential), external resistors and capacitors set the gain, bandwidth, and frequency response. The op-amp amplifies the voltage difference between its input terminals, producing an output signal conditioned according to the circuit design. The feedback network determines the closed-loop gain and stability. For example, in an inverting amplifier, the gain is set by the ratio of feedback resistance to input resistance. The op-amp's high open-loop gain and feedback ensure predictable performance. The circuit operates within specified supply voltage and temperature ranges, and its performance is characterized by parameters such as input offset voltage, bias current, slew rate, and bandwidth.

Common Materials

Silicon (for integrated circuit op-amp), FR-4 (PCB substrate), Copper (traces), Solder

Technical Parameters

Parameter	Typical range	Notes & selection driver
Supply Voltage	±2.5–±18 V DC	Dual supply typical; single supply up to 36 V
Input Offset Voltage	0.1–5 mV	Lower for precision op-amps
Input Bias Current	1–500 nA	Bipolar inputs higher; CMOS lower
Gain Bandwidth Product	1–100 MHz	Determines max frequency for given gain
Slew Rate	0.5–20 V/µs	Limits large-signal bandwidth
Operating Temperature Range	-40–85 °C	Industrial grade; military up to 125°C
Input Voltage Range	0–Vcc-1.5 V	Rail-to-rail inputs available
Output Voltage Swing	0.1–Vcc-0.1 V	Rail-to-rail outputs for low voltage
Common Mode Rejection Ratio	70–120 dB	Higher rejects common-mode noise
Power Supply Rejection Ratio	80–120 dB	Higher reduces supply noise effect
Package Type	SOT-23-5	Other: SOIC-8, DIP-8, QFNJEDEC MO-178
Weight	0.01–0.5 g	Depends on package

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM

Operational Amplifier IC
The core active component that provides high gain and performs the signal amplification/conditioning.

Material: Silicon (semiconductor)
Feedback Resistor Part
Sets the gain of the amplifier circuit in conjunction with the input resistor.

Material: Metal film or carbon composition
Input Resistor Part
Determines the input impedance and, with the feedback resistor, sets the circuit gain.

Material: Metal film or carbon composition
Decoupling Capacitor Part
Filters noise from the power supply lines to ensure stable operation of the op-amp.

Material: Ceramic or electrolytic

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Signal Conditioning PCB

View system integration details

Output Summer

View system integration details

Manufacturers of Operational Amplifier Circuit

Manufacturer profiles associated with Operational Amplifier Circuit.

Sourcing Operational Amplifier Circuit from China?

Tell us your specification and target quantity — we will match it against manufacturer records and come back with the factories that fit.

Request manufacturers We manufacture this

Manufacturer listings support early research and capability understanding. They are not certification, ranking, or transaction guarantees.

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

Verify equipment lists, process limits, capacity, and representative production evidence.

Inspection readiness

Confirm test methods, calibrated equipment, sampling plans, and traceable reports.

Supplier transparency

Check the legal entity, factory address, ownership, certifications, and direct contacts.

CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Frequently Asked Questions

What is an operational amplifier circuit used for?

It is used to condition analog signals by amplifying, filtering, integrating, differentiating, or buffering them, preparing them for further processing or measurement.

What are typical supply voltage requirements?

Typical dual supply is ±2.5 to ±18 V DC, with single supply up to 36 V. Always check the specific op-amp datasheet.

How is gain determined in an op-amp circuit?

Gain is set by external resistors and capacitors in the feedback network. For example, in an inverting amplifier, gain is the ratio of feedback resistance to input resistance.

What parameters should be verified before use?

Verify supply voltage, input offset voltage, input bias current, gain bandwidth product, slew rate, operating temperature range, input/output voltage ranges, CMRR, PSRR, package type, and weight against the manufacturer's datasheet.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

Preliminary Technical Classification

This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

Buyer enquiry

Request manufacturing insight for Operational Amplifier Circuit

Ask for use case, specification boundaries, supplier type, and RFQ preparation information for this product.

Where it goes: Straight to the CNFX editorial desk, and to the manufacturer if this product is linked to a claimed profile. Nothing is broadcast to a supplier list.
Your details stay here: We do not sell or rent enquiry data, and we do not add you to a mailing list. Used only to answer this request.
No commission, no middleman: CNFX is a directory. We take no cut of any order and never negotiate on a supplier's behalf.
What we don't claim: A listing is not an endorsement. Qualify every supplier and verify every figure yourself before ordering.

voltage:	±5V to ±18V supply range
bandwidth:	1 MHz to 100 MHz (depending on model)
slew rate:	0.5 V/µs to 100 V/µs
temperature:	-40°C to +125°C (typical industrial range)
input offset voltage:	±0.5 mV to ±5 mV

Product Specifications

Applied To / Applications

Industrial Ecosystem & Supply Chain Structure

Application Fit & Sizing Matrix

Reliability & Engineering Risk Analysis

Compliance & Manufacturing Standards