MCP6234-E/P - 300 kHz Quad Rail-to-Rail Op Amp | Microchip
Teilenummer: MCP6234-E/P ✓ AktivMCP6234-E/P Übersicht
An operational amplifier, or op amp, is an analog building block that amplifies the voltage difference between its differential inputs. The MCP6234 combines four amplifiers in one package, placing it in the hierarchy of quad op amp, general-purpose amplifier, analog IC, and integrated circuit. Rail-to-rail inputs allow the input common-mode range to approach the supply rails, while rail-to-rail outputs support low-voltage sensor and signal-chain designs without requiring a separate output amplifier.
Key electrical characteristics include a 300 kHz gain-bandwidth product, 0.15 V/µs slew rate, and approximately 20 µA typical supply current per amplifier. The family operates from 1.8 V and features a typical phase margin of 65 degrees. The MCP6234-E/P is specified in a 14-pin PDIP package with a 0.300-inch, 7.62 mm body width and is supplied in a tube. A typical input offset voltage of 5 mV is listed for this variant.
The device is suited to portable measurement systems, low-voltage sensor interfaces, audio and communication signal conditioning, current monitoring, and general instrumentation. Its low supply voltage and low quiescent current are valuable in battery-powered equipment, while the 300 kHz bandwidth covers audio and low-frequency control applications rather than high-speed precision waveform work.
When designing around the MCP6234-E/P, verify the common-mode and output swing limits against the actual signal and load. Decouple each supply connection close to the device, use short feedback paths, and check the unity-gain stability and output drive requirements before selecting external compensation or filtering networks.
Drop-in-Alternativen für MCP6234-E/P – gleiches Gehäuse, Pin-kompatibel. Bauteile mit anderem Gehäuse, die eine PCB-Überarbeitung erfordern, sind ausgeschlossen.
MCP6234
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MCP6234-E/P Grenzwerte & elektrische Eigenschaften
| Number of Amplifier Circuits | 4 circuits |
| Amplifier Type | General Purpose |
| Gain-Bandwidth Product | 300 kHz |
| Slew Rate | 0.15 V/µs |
| Minimum Single Supply Voltage | 1.8 V |
| Typical Supply Current | 20 µA per amplifier |
| Input Common-Mode Range | Rail-to-rail input |
| Output Swing | Rail-to-rail output |
| Typical Phase Margin | 65 degrees |
| Input Offset Voltage | 5 mV typical |
| Gehäuse | 14-PDIP (0.300 in, 7.62 mm) |
| Montageart | Through-hole |
| Packaging | Tube |
| Temperature Grade | Extended temperature |
MCP6234-E/P Pin-Konfiguration
| Pin 1 | OUTA — Amplifier A output |
| Pin 2 | IN-A- — Amplifier A inverting input |
| Pin 3 | IN-A+ — Amplifier A non-inverting input |
| Pin 4 | V- — Negative supply connection |
| Pin 5 | IN-B+ — Amplifier B non-inverting input |
| Pin 6 | IN-B- — Amplifier B inverting input |
| Pin 7 | OUTB — Amplifier B output |
| Pin 8 | OUTC — Amplifier C output |
| Pin 9 | IN-C- — Amplifier C inverting input |
| Pin 10 | IN-C+ — Amplifier C non-inverting input |
| Pin 11 | V+ — Positive supply connection |
| Pin 12 | IN-D+ — Amplifier D non-inverting input |
| Pin 13 | IN-D- — Amplifier D inverting input |
| Pin 14 | OUTD — Amplifier D output |
Typische Anwendungen
MCP6234-E/P ist geeignet für 6 Anwendungs: Low-Voltage Sensor Signal Conditioning, Portable Instrumentation Signal Chain, Audio Preamplifier and Output Buffering, Current Monitoring and Control Loops, Interface Level Shifting and Buffering, Data Acquisition and Active Filtering.
Low-Voltage Sensor Signal Conditioning
The MCP6234-E/P fits sensor front ends that operate from a 1.8 V or 3.3 V rail because its four amplifiers provide rail-to-rail inputs and outputs at approximately 20 µA typical supply current per amplifier. Each channel can buffer a sensor before amplification or filtering, reducing loading on the sensor while keeping the signal within the supply-rail limits. The 300 kHz gain-bandwidth product supports low-frequency transducer and resistance-sensor networks, while the 0.15 V/µs slew rate handles moderate signal transitions. Use short traces and a local supply bypass capacitor on pin 11, and verify that the sensor output remains inside the amplifier's input common-mode range throughout the measurement cycle.
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Portable Instrumentation Signal Chain
The MCP6234-E/P supports portable measurement equipment where four analog channels are needed without adding a separate low-power amplifier per function. Its 1.8 V minimum single-supply operation and approximately 20 µA typical supply current help conserve battery energy, while rail-to-rail input and output swing improves usable signal range in compact designs. The 300 kHz gain-bandwidth product is appropriate for temperature, pressure, and level sensing rather than high-speed data acquisition. Place the four amplifiers in gain stages for channel multiplexing, or use two for differential conditioning and two for active filtering. Confirm the ADC input range, common-mode behavior, and settling requirements against the system clock and sampling rate.
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Audio Preamplifier and Output Buffering
The MCP6234-E/P can condition low-level audio signals in battery-powered audio equipment using its rail-to-rail inputs and 300 kHz gain-bandwidth product. The four amplifiers allow channels to be configured as gain stages, active filters, or output buffers while operating from a low single supply. Audio-band performance is supported by the 0.15 V/µs slew rate, but large-signal headroom must be checked against the available supply and load. Place a small resistor between the amplifier output and the driven input when the load is capacitive, and route the audio return current directly to the device ground pin. Verify output swing, distortion, and stability with the intended speaker or line input impedance before layout release.
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Current Monitoring and Control Loops
The MCP6234-E/P is suitable for current monitoring and slow feedback loops because four amplifiers can implement sensing, gain, filtering, and output drive functions in one package. The 1.8 V minimum supply supports low-energy systems, and the approximately 20 µA typical supply current per amplifier limits overhead when several loops are active. The 300 kHz gain-bandwidth product allows operation as a general-purpose error amplifier, while the 0.15 V/µs slew rate is sufficient for many control signals rather than fast compensation networks. Keep the high-impedance feedback nodes physically short, bias both amplifier inputs within the common-mode range, and confirm that the loop bandwidth remains well below the amplifier's unity-gain bandwidth.
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Interface Level Shifting and Buffering
The MCP6234-E/P can buffer logic-level signals between 1.8 V and higher-voltage domains when rail-to-rail input and output operation is required. Four independent amplifiers make the device convenient for isolating control signals, buffering MCU outputs, and conditioning inputs entering a mixed-signal system. The low supply current suits compact control boards, and the 300 kHz bandwidth easily covers digital control and low-frequency interface signals. Ensure the input never exceeds the device's absolute maximum ratings during power sequencing, and confirm that the downstream device's input thresholds match the buffered output swing. Use separate return paths for input and output currents to minimize ground offset and coupling into sensitive analog nodes.
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Data Acquisition and Active Filtering
The MCP6234-E/P can serve as the analog front end of a low-speed data-acquisition system by providing gain, active filtering, and impedance isolation ahead of an ADC. Four channels permit simultaneous scaling of sensor outputs or implementation of a fourth-order filter using two amplifiers per stage. Its 300 kHz gain-bandwidth product gives ample headroom for moderate-bandwidth signals, and the 0.15 V/µs slew rate supports accurate settling of longer acquisition intervals. Derive filter component values around the selected noise gain and verify phase margin using the manufacturer guidance. Keep the ADC reference and sensitive inputs away from digital return currents, and place the bypass capacitor adjacent to the supply pins.
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Zusammenfassung der empfohlenen Produkte
Technische Referenzdaten für MCP6234-E/P – Vergleich, Designhinweise und Compliance-Informationen.
Auswahlhilfe
Vergleich mit Alternativen
| Parameter | Dieses Produkt | MCP6234 |
|---|---|---|
| Brand | Microchip Technology | Microchip Technology |
| Package | 14-PDIP (0.300 in, 7.62 mm) | 14-PDIP configuration when ordered with the corresponding package code |
| Number of Amplifiers | 4 circuits | 4 circuits |
| Amplifier Type | General Purpose | General Purpose |
| Gain-Bandwidth Product | 300 kHz | 300 kHz |
| Slew Rate | 0.15 V/µs | 0.15 V/µs |
| Minimum Single Supply Voltage | 1.8 V | 1.8 V |
| Typical Supply Current | 20 µA per amplifier | 20 µA per amplifier |
| Input and Output Swing | Rail-to-rail input and output | Rail-to-rail input and output |
| Typical Phase Margin | 65 degrees | 65 degrees |
Wichtigste Unterscheidungsmerkmale
- Four rail-to-rail amplifiers in one through-hole package (vs. Single-amplifier alternatives such as TLV271IDR)
- Low-voltage operation with modest supply current (vs. Conventional 14-pin DIP quad op amps)
- Rail-to-rail input and output operation (vs. MCP6144-E/SL)
Designhinweise
Place the supply bypass capacitor immediately between pins 11 and 4, with a short and low-inductance return path. Keep the four amplifier sections physically separate when they drive sensitive or high-impedance nodes, and avoid routing output currents through the ground region used by input-side feedback networks. The PDIP footprint leaves generous routing space, but the input and output leads of each channel should still remain short to reduce parasitic coupling.
Rail-to-rail input and output does not permit the inputs to exceed the absolute maximum ratings during power-down or supply sequencing. Check both input pins for overvoltage before connecting external sources, and avoid driving an input below ground or above the positive rail. When using the amplifier as a comparator, account for the propagation delay implied by its 300 kHz gain-bandwidth product rather than expecting ideal comparator behavior.
Evaluate the gain-bandwidth product at the actual closed-loop noise gain and verify phase margin for capacitive loads or high-frequency feedback. For long feedback routes, add an isolated feedback node and keep the amplifier output away from sensitive input traces. Use a small series isolation resistor when driving capacitive loads, and confirm settling time against the sampling interval used by an ADC or control system.
Compliance-Informationen
RoHS, REACH, AEC-Q100, lead-free, halogen-free, and conflict-minerals declarations were not identified in the available manufacturer and distributor information. Verify current compliance documents with the manufacturer before regulated production use.
