MC33204P - Quad Rail-to-Rail 1.8V Op Amp | onsemi
N.º de pieza: MC33204P ✓ ActivoMC33204P Descripción general
An operational amplifier is an analog integrated circuit that uses high-gain differential feedback to amplify small voltage differences between its inputs. The MC33204P belongs to the MC33201/MC33202/MC33204 family of low-voltage rail-to-rail amplifiers. Its differential input stage supports input voltages that may extend beyond the supply rails, while the output stage can approach both rails. This makes it useful where signal levels occupy a significant portion of the supply range.
According to the onsemi product page, inputs can be driven as high as 200 mV beyond the supply rails without phase reversal on the outputs, and the output can swing within 50 mV of each rail. These figures are particularly useful when designing from a 1.8 V or 3.3 V rail. The four-amplifier arrangement supports independent gain stages, sensor interfaces, filters, comparators, and active feedback networks without requiring four separate packages.
The common-mode input range is a defining feature of this amplifier family. Rail-to-rail input behavior lets a sensor output remain in the usable input range even when it approaches a supply rail. Output swing close to the rails increases the available dynamic range and can reduce the need for an additional output-biasing stage. Designers must still verify signal levels, output-load conditions, stability, and gain bandwidth for the selected operating point.
Typical uses include portable sensor interfaces, industrial control and instrumentation, battery-powered monitoring, low-voltage data acquisition, active filters, and general analog signal conditioning. The quad package is particularly suitable when four similar amplifier functions are required. It can also support mixed functions, such as one buffer, two gain stages, and one comparator, although each channel's loading and stability requirements should be evaluated independently.
For layout, route input and feedback connections away from output and supply paths to reduce coupling. Place bypassing capacitors close to the supply pins and maintain the feedback network close to the amplifier. Confirm the gain-bandwidth product and stability requirements for the intended closed-loop gain, especially when driving capacitive loads or operating with long PCB traces.
This page combines the manufacturer specifications, package information, cross-reference findings, application guidance, and engineering trade-offs needed to evaluate the MC33204P for a new analog design. It also highlights where the quad pin-compatible LM348 may be considered and where its rail-to-rail performance must be checked before substitution.
Alternativas directas para MC33204P — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Variantes de esta serie
Modelos de la misma serie compatibles directamente con MC33204P (mismo factor de forma y huella) — difiere en Mounting Type, Package.
LM3481MMX/NOPB
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Ver hoja de datos →MC33204P Valores máximos y características eléctricas
| Amplifier Type | General-purpose operational amplifier |
| Number of Channels | 4 circuits |
| Supply Voltage Range | 1.8 V to 12 V |
| Rail-to-Rail Input | Yes |
| Rail-to-Rail Output | Yes |
| Maximum Input Exceeding Supply Rail | 200 mV without output phase reversal |
| Output Swing from Rail | Within 50 mV of each rail |
| Encapsulado | 14-pin plastic dual in-line package |
| Package Type | PDIP-14 |
| Tipo de montaje | Through-hole |
| Product Classification | Standard general-purpose amplifier |
| Manufacturer Family | MC33201/MC33202/MC33204 |
| Datasheet Length | 16 pages |
| Datasheet File Size | 204 kbytes |
Configuración de pines de MC33204P
| Pin 1 | OUT1 — Output of amplifier 1 |
| Pin 2 | IN1- — Inverting input of amplifier 1 |
| Pin 3 | IN1+ — Non-inverting input of amplifier 1 |
| Pin 4 | V- — Negative supply or ground connection |
| Pin 5 | IN2+ — Non-inverting input of amplifier 2 |
| Pin 6 | IN2- — Inverting input of amplifier 2 |
| Pin 7 | OUT2 — Output of amplifier 2 |
| Pin 8 | OUT3 — Output of amplifier 3 |
| Pin 9 | IN3- — Inverting input of amplifier 3 |
| Pin 10 | IN3+ — Non-inverting input of amplifier 3 |
| Pin 11 | V+ — Positive supply connection |
| Pin 12 | IN4+ — Non-inverting input of amplifier 4 |
| Pin 13 | IN4- — Inverting input of amplifier 4 |
| Pin 14 | OUT4 — Output of amplifier 4 |
Aplicaciones típicas
MC33204P es adecuado para 6 aplicacións: Low-Voltage Sensor Signal Conditioning, Portable Medical Monitoring, Industrial Process Measurement, Battery-Powered Data Acquisition, Active Audio and Control Filters, General-Purpose Analog Interface.
Low-Voltage Sensor Signal Conditioning
The MC33204P fits low-voltage sensor interfaces because its inputs can be driven as high as 200 mV beyond the supply rails without phase reversal, while its output can approach within 50 mV of either rail. This rail-to-rail behavior preserves usable signal span in 1.8 V and 3.3 V systems where a conventional amplifier may clip near the supply limits. Place the amplifier close to the sensor output, keep high-impedance input routes short, and add supply bypassing to prevent sensor and digital circuitry from injecting noise. Validate offset, bias current, noise, and common-mode behavior against the particular sensor before production.
Recomendado
Portable Medical Monitoring
The MC33204P is appropriate for compact monitoring modules that operate from low supply voltages and require several analog channels. Its 1.8 V to 12 V operating range supports both low-energy portable systems and higher-voltage instrumentation, while four circuits can implement buffering, gain, filtering, and threshold functions in one 14-pin package. Rail-to-rail inputs help retain sensor information when the signal approaches a rail. For medical equipment, isolate patient-connected circuitry as required, minimize input leakage paths, apply appropriate noise and stability analysis, and use the exact MC33204P electrical limits during risk assessment.
Recomendado
Industrial Process Measurement
The MC33204P can condition low-level signals in industrial measurement systems where the available interface voltage is limited. Rail-to-rail input capability allows a controller or transducer output to approach the supply rails, and the output can swing within 50 mV of each rail, increasing signal utilization at low voltage. The quad configuration supports multiple transducers, amplifiers, or active filters while limiting the number of packages. Maintain short sensor routes, isolate analog and digital grounds according to the system architecture, and verify input bias current against high-impedance sensor sources.
Recomendado
Battery-Powered Data Acquisition
The MC33204P fits battery-powered data-acquisition front ends because its 1.8 V minimum supply voltage supports low-energy operation and four amplifier circuits reduce package count. The rail-to-rail input range is useful when sensor signals span much of a low-voltage battery rail, while the output can approach within 50 mV of each rail to maximize usable ADC input range. Select the closed-loop gain against the required bandwidth, include supply bypass capacitors at the device, and check settling time for multiplexed acquisition systems. A low-power design should also evaluate the quiescent-current specification for the selected operating conditions.
Recomendado
Active Audio and Control Filters
The MC33204P can implement multiple active-filter and control stages where low supply voltage limits conventional amplifier headroom. Rail-to-rail output swing allows filter signals to use a greater portion of the available voltage range, and the four-channel package supports repeated second-order sections or mixed buffering and gain functions. The design must account for amplifier bandwidth at the selected closed-loop gain, component tolerances, output loading, and power-supply noise. Place each feedback network close to its channel, avoid shared high-impedance nodes, and use decoupling that meets the amplifier's stability requirements.
Recomendado
General-Purpose Analog Interface
The MC33204P provides four general-purpose amplifier channels for buffering, gain, active feedback, threshold detection, and cross-coupled analog functions. Its 1.8 V to 12 V supply range allows the same family to address portable and industrial control boards, while the 14-pin PDIP package simplifies through-hole assembly and inspection. Rail-to-rail inputs and outputs maximize usable signal range in low-voltage circuits. Assign each channel according to the datasheet pinout, keep feedback loops compact, and verify source impedance, capacitive loading, and output-current demand for every operating condition.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para MC33204P — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | LM348 |
|---|---|---|
| Brand | onsemi | Texas Instruments |
| Package | PDIP-14 | PDIP-14 |
| Number of Amplifiers | 4 circuits | 4 circuits |
Diferenciadores clave
- Specified low-voltage rail-to-rail input behavior (frente a LM348)
- Output swing uses nearly the complete low-voltage supply range (frente a LM348)
- Four amplifier circuits in one through-hole package (frente a LM348)
Notas de diseño
Route each amplifier's input and feedback components close to the associated pins, and keep output traces away from high-impedance input nodes. Place supply-bypass capacitance directly between the supply and ground pins. For the MC33204P, rail-to-rail input operation does not eliminate PCB coupling, so maintain separation between sensitive sensor inputs and output or switching-current paths. Check the final PCB against the manufacturer's package drawing and pin table.
Do not assume that any 14-pin quad amplifier is electrically interchangeable with the MC33204P. The MC33204P permits inputs to exceed the supply rails by as much as 200 mV without output phase reversal and can swing its output within 50 mV of each rail. Before substituting the LM348, verify its common-mode input range, output swing, input offset, bias current, bandwidth, slew rate, noise, and stability in the actual circuit.
Account for source impedance when using the rail-to-rail input stage. High sensor-output resistance combined with input bias current can create a voltage error that depends on temperature and supply condition. Add an appropriate bias network or buffer the sensor if its impedance is high. Also evaluate noise and offset in the smallest signal that the system must resolve rather than relying only on the rail-to-rail operating range.
Información de cumplimiento
No specific RoHS, REACH, halogen-free, or conflict-minerals status was stated in the manufacturer page or the listed technical pages.
