THS4227D - Dual 120MHz Rail-to-Rail Op Amp | Texas Instruments
N.º de pieza: THS4227D ✓ ActivoTHS4227D Descripción general
An operational amplifier is an analog building block that amplifies the difference between two input voltages while providing high input impedance and low output impedance. The THS4227D belongs to the voltage-feedback operational-amplifier family within the broader linear-IC and signal-processing hierarchy. Its rail-to-rail output capability allows the output voltage to approach the supply rails more closely than a conventional fixed-output amplifier, which is useful in compact, low-voltage systems.
The main performance features are 120 MHz bandwidth, 990 V/us slew rate, approximately 900 nA input bias current, and a 1.35 V to 7.5 V operating supply range. These specifications make the amplifier suitable for applications requiring rapid transitions, wide-band signal amplification, or low-voltage ADC-driver support. The dual configuration provides two amplifiers in one package, reducing board area when two channels are required.
The THS4227D uses a voltage-feedback architecture and is specified for low-voltage analog-to-digital converter interfacing, among other precision signal paths. The combination of high bandwidth and rail-to-rail output can preserve signal swing in systems where the available supply headroom is limited. Designers should nevertheless verify output-current capability, settling behavior, output-voltage limits, input common-mode range, stability, and noise values against the manufacturer datasheet before finalizing a design.
Typical applications include low-voltage ADC input drivers, video and communications signal conditioning, instrumentation interfaces, and portable or industrial control systems. In each case, the amplifier can be used where a dual, high-speed voltage-feedback stage is needed without moving to a larger or more power-intensive package. The SOIC-16 package designation appears in one verified datasheet index, while distributor listings also identify the device as a 14-SOIC; the exact mechanical drawing should therefore be confirmed from the manufacturer documentation.
A key design consideration is to keep the feedback network short and use appropriate source and load impedances for the required closed-loop gain. High-speed voltage-feedback amplifiers can be sensitive to parasitic capacitance, excessive loop gain, and improperly placed compensation components. The supply rails should be decoupled close to the device, and the output must remain within the datasheet-defined operating limits.
This page consolidates verified distributor pricing, package information, operating limits, and drop-in alternative research for engineers comparing the THS4227D with other dual high-speed operational amplifiers. Because the supplied cross-reference results identify replacement manufacturers but do not name specific substitute MPNs, no unsupported part numbers are presented as drop-in alternatives.
Alternativas directas para THS4227D — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
No hay alternativas directas disponibles para este producto.
Solicitar alternativasTHS4227D Valores máximos y características eléctricas
| Supply Voltage Range | 1.35 V to 7.5 V |
| Rango de temperatura de funcionamiento | -40 C to +85 C |
| Number of Amplifiers | 2 circuits |
| Gain-Bandwidth Product | 120 MHz |
| Slew Rate | 990 V/us |
| Input Bias Current | 900 nA |
| Output Architecture | Rail-to-rail output |
| Feedback Architecture | Voltage feedback |
| Encapsulado | 14-pin SOIC |
| Tipo de montaje | Surface mount |
| Terminals | 16 terminals |
| Package Code | SOP |
| Temperature Grade | Industrial |
Guía de configuración de pines de THS4227D sop
Configuración de pines para THS4227D (encapsulado sop). Este componente analógico presenta pines de entrada, salida y alimentación. Consulte la hoja de datos del fabricante para conocer las configuraciones de los pines de ajuste de offset, compensación y habilitación. Ideal para circuitos de acondicionamiento de señal y amplificadores.
No hay datos detallados de patillaje disponibles para THS4227D.
Consulte la hoja de datos para ver la configuración completa de patillas.
Aplicaciones típicas
THS4227D es adecuado para 6 aplicacións: Low-Voltage ADC Input Driver, Communications Signal Conditioning, Video Buffering, Portable Instrumentation Front End, Industrial Control Signal Conditioning, Data Acquisition and Measurement.
Low-Voltage ADC Input Driver
The THS4227D fits a low-voltage ADC signal chain because the verified specifications identify low-voltage analog-to-digital converter interfacing and provide 120 MHz bandwidth with 990 V/us slew rate. Its dual voltage-feedback configuration can drive two ADC channels when the required gain and settling behavior are compatible. The rail-to-rail output helps preserve signal swing in a constrained 1.35 V to 7.5 V supply environment, although the selected ADC’s input range must be checked before sizing the feedback network. Decoupling capacitors should be placed close to the supply pins, and source impedance, feedback resistance, and ADC capacitive loading should be verified with stability and settling calculations.
Recomendado
Communications Signal Conditioning
The THS4227D is appropriate for communications signal conditioning when the channel needs 120 MHz bandwidth and fast large-signal response. Its 990 V/us slew rate can support higher-frequency edges, while the approximately 900 nA input-bias figure is useful when working with high-impedance sources. The dual amplifier configuration can support two matched channels or separate transmit and receive paths. Because the verified material does not provide noise, common-mode-range, output-current, or channel-to-channel matching values, those characteristics must be confirmed from the manufacturer datasheet. Short signal traces, a ground-return path close to the amplifier, and careful feedback-component placement are essential in a high-speed implementation.
Recomendado
Video Buffering
The THS4227D can serve as a high-speed buffer or gain stage for low-voltage video signals because its verified bandwidth reaches 120 MHz and its output is rail-to-rail. These characteristics provide the transition speed required to handle fast video edges more effectively than a slow general-purpose amplifier. In a dual implementation, one channel may carry the main signal while the other provides a related path or monitor output. The designer must confirm video gain, output swing, load capability, and stability into the required cable or downstream input because these details are not stated in the supplied data. A 1.35 V minimum supply also makes rail-to-rail behavior especially important, but real-world input and output limits should always be taken from the datasheet.
Recomendado
Portable Instrumentation Front End
The THS4227D is suitable for a portable instrumentation front end when the design combines low-voltage operation with rapid signal changes. The 1.35 V to 7.5 V supply range can support compact battery-powered circuitry, and the approximately 900 nA input-bias current helps limit source-loading effects in high-impedance measurement paths. Its 120 MHz bandwidth is valuable for sensors with sharp events, although a precision amplifier may be preferable when the dominant requirements are offset, drift, and low noise rather than speed. The industrial -40 C to +85 C operating range supports many environment categories, but enclosure heating, ESD, and system-noise conditions must be considered. Use short traces and solid ground-plane return paths to prevent the high-speed stage from amplifying unwanted interference.
Recomendado
Industrial Control Signal Conditioning
The THS4227D can condition rapidly changing control and sensor signals in industrial equipment operated across the verified -40 C to +85 C range. Its 990 V/us slew rate and 120 MHz bandwidth help preserve fast transitions, while the dual package provides two amplifiers without requiring two separate packages. Industrial suitability remains application-dependent because the verified information does not establish automotive qualification, reinforced isolation, ESD rating, or long-term availability commitments. Engineers should verify noise, offset, common-mode range, stable capacitive loading, and output-current capability for the selected gain and load. A low-noise supply and local bypass capacitors are recommended because fast transient behavior does not prevent supply ripple from modulating the signal path.
Recomendado
Data Acquisition and Measurement
The THS4227D fits a high-speed data-acquisition front end that must amplify a rapidly changing sensor signal before sampling. The dual voltage-feedback architecture allows two channels to be handled with consistent topology, and the 120 MHz bandwidth can accommodate signals considerably faster than a conventional precision op amp. The approximately 900 nA input-bias current reduces loading when source resistance rises, although input-capacitance stability and noise must be reviewed for each sensor. Rail-to-rail output supports use of nearly the available signal range in low-voltage systems. For a production design, confirm ADC input range, settling requirements, gain accuracy, output swing, and the exact SOIC footprint directly from the manufacturer datasheet before layout release.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para THS4227D — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto |
|---|---|
| Brand | Texas Instruments |
| Package | 14-SOIC according to DigiKey listing |
| Number of Amplifiers | 2 circuits |
| Supply Voltage Range | 1.35 V to 7.5 V |
| Gain-Bandwidth Product | 120 MHz |
| Slew Rate | 990 V/us |
| Input Bias Current | 900 nA |
| Output Architecture | Rail-to-rail output |
| Operating Temperature Range | -40 C to +85 C |
| Verified Starting Price | $0.7608 at LCSC as of 2026-10-29 |
Diferenciadores clave
- High-speed dual-channel implementation (frente a Generic low-speed dual operational amplifier)
- Low-voltage operation with rail-to-rail output (frente a Fixed-output dual amplifier)
- Low input-bias-current class (frente a Standard dual precision amplifier)
Notas de diseño
Keep the THS4227D feedback components close to the amplifier pins and route the feedback trace as a short, continuous loop on the same PCB layer as the device. With 120 MHz bandwidth and 990 V/us slew rate, parasitic trace inductance and capacitance can alter gain or stability. Use a solid ground plane, avoid long routes around the package, and place supply-bypass capacitors immediately between the supply and ground pins.
Verify the complete signal path against the required closed-loop gain, source impedance, load capacitance, and output-current demand. The verified data establishes 120 MHz bandwidth and 990 V/us slew rate but does not provide the stability, output-current, or output-swing limits. Therefore, do not assume that a low-capacitance ADC input, cable, or isolation barrier can be driven safely without consulting the manufacturer datasheet and checking the intended gain.
Do not treat the rail-to-rail-output description as proof of rail-to-rail input operation. The supplied information does not identify the input common-mode range, offset, noise, settling, or channel-matching parameters. Confirm those values, the exact 14-SOIC outline, and the pin functions before layout. Conflicting package descriptions in the search results make the manufacturer mechanical drawing essential.
Use a supply within the verified 1.35 V to 7.5 V range and place local bypass capacitance at the THS4227D supply pins. Because no verified quiescent-current value is available, estimate system supply demand only after obtaining that specification. Check the output stage for continuous-load capability and thermal stress under the intended signal pattern; the provided listings do not supply enough electrical data for a defensible power-dissipation calculation.
Información de cumplimiento
The supplied verified data does not state RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status for THS4227D. The part is an industrial-temperature operational amplifier, but that designation alone does not establish automotive qualification.