LT1209CS - Quad 45MHz 400V/µs Op Amp | Analog Devices
N.º de pieza: LT1209CS ✓ ActivoLT1209CS Descripción general
An operational amplifier is a high-gain differential amplifier whose feedback network determines its behavior. The LT1209 belongs to the general-purpose operational-amplifier hierarchy, combining high speed with improved DC characteristics. It is a voltage-feedback amplifier designed to serve as a unity-gain buffer, a signal amplifier, or the active element in instrumentation and data-acquisition circuits. Compared with slower general-purpose devices, its principal advantage is rapid large-signal response rather than micropower operation.
Key features include a 45 MHz gain-bandwidth product, 400 V/µs slew rate, and a 90 ns settling time to 0.1% for a 10 V step. The listed DC gain is 7 V/mV, while the maximum input offset voltage is reported as 3 mV in the LT1208/LT1209 datasheet summary. Unity-gain stability allows direct operation without compensation or added closed-loop gain, and the single-gain-stage architecture gives the device outstanding settling characteristics.
The LT1209CS combines the speed of a high-speed voltage-feedback amplifier with DC performance suited to general instrumentation. Its wide supply range permits operation near ±15 V, while the minimum output swing of ±12 V into 500 ohms provides useful output range for bipolar signal chains. The 7 mA supply current per amplifier is a meaningful tradeoff: fast settling and slew performance are obtained at a higher supply current than typical low-power op amps.
Typical uses include high-speed data acquisition, active filtering, sample-and-hold buffers, waveform conditioning, video or communications signal paths, and instrumentation requiring rapid settling. In a data-conversion system, the amplifier can drive or buffer an ADC input while preserving pulse amplitude and timing. In active filters, its 45 MHz bandwidth and 400 V/µs slew rate support signal paths whose operating frequency is comfortably below those limits.
Designers should preserve adequate output-voltage headroom and verify capacitive-load stability with the actual output network. Input and feedback resistances also determine gain-bandwidth and noise behavior, so practical resistor values should be selected rather than relying on the nominal 7 V/mV open-loop gain. Stable reference grounding and short feedback paths are important because the device’s high speed can expose board-level parasitic capacitance.
This page consolidates the available manufacturer and distributor information for the LT1209CS, distinguishes verified device characteristics from unavailable data, and provides practical selection and design guidance. It also distinguishes genuine drop-in alternatives from related package or ordering variants that should not be treated as automatic replacements.
Alternativas directas para LT1209CS — 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 alternativasLT1209CS Valores máximos y características eléctricas
| Amplifier Type | Operational Amplifier |
| Number of Channels | 4 circuits |
| Topología | Single gain stage |
| Gain-Bandwidth Product | 45 MHz |
| Slew Rate | 400 V/µs |
| Unity-Gain Stability | Unity gain stable |
| DC Gain | 7 V/mV |
| Maximum Input Offset Voltage | 3 mV |
| Maximum Input Offset Voltage, Distributor Listing | 5000 µV |
| Settling Time | 90 ns to 0.1% for a 10 V step |
| Corriente de alimentación | 7 mA per amplifier |
| Minimum Rated Supply Configuration | ±15 V |
| Minimum Output Swing | ±12 V into 500 ohms |
| Encapsulado | 16-lead SOIC, PDSO16 |
| Tipo de montaje | Surface mount |
| Input Offset Voltage, Linear-Stock Listing | 1 mV |
| Supply Voltage Span | 5 V to 30 V |
Guía de configuración de pines de LT1209CS 16-lead soic, pdso16
Configuración de pines para LT1209CS (encapsulado 16-lead soic, pdso16). 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 LT1209CS.
Consulte la hoja de datos para ver la configuración completa de patillas.
Aplicaciones típicas
LT1209CS es adecuado para 6 aplicacións: High-Speed Data Acquisition, ADC Input Buffering, Active Filtering, Waveform Conditioning, Precision Instrumentation, Communications Signal Conditioning.
High-Speed Data Acquisition
The LT1209CS fits high-speed data-acquisition front ends because each channel combines a 45 MHz gain-bandwidth product with a 400 V/µs slew rate and 90 ns settling to 0.1% for a 10 V step. According to the Analog Devices LT1208/LT1209 product information, the single-gain-stage architecture provides outstanding settling characteristics, making the amplifier useful for conditioning and buffering rapidly changing sensor or converter outputs. Four channels are available in one 16-lead SOIC, reducing the number of separate amplifier packages. The principal design constraint is that 7 mA per amplifier must be included in the power budget, and the selected closed-loop bandwidth must remain sufficiently below 45 MHz while preserving stability with the ADC input capacitance.
Recomendado
ADC Input Buffering
The LT1209CS can buffer ADC inputs when acquisition systems require low distortion and rapid settling rather than micropower operation. Its 400 V/µs slew rate supports large, fast input transitions, while the 90 ns settling specification provides a defined response for a 10 V step. According to the LT1208/LT1209 datasheet summary, unity-gain stability permits direct buffer configuration, but engineers must verify the complete load network rather than assuming every ADC input is stable. Feedback routing should be short, source impedance should be controlled, and the amplifier’s ±12 V minimum output swing into 500 ohms should be checked against the ADC’s required common-mode range.
Recomendado
Active Filtering
The LT1209CS is suitable for active filters handling signals that require more bandwidth than a conventional general-purpose amplifier can deliver. Its 45 MHz gain-bandwidth product supports closed-loop filter sections at substantially lower practical frequencies, while the 400 V/µs slew rate improves large-signal behavior compared with slower amplifiers. The unity-stable single-gain-stage topology can also be configured using either conventional inverting or noninverting networks, depending on the required transfer function. Component tolerances still determine cutoff accuracy, and the high speed makes parasitic capacitance and probe loading important. Power design must also account for 7 mA supply current per channel across all four amplifiers.
Recomendado
Waveform Conditioning
The LT1209CS supports waveform-conditioning tasks where pulses must retain their intended amplitude and settle quickly before the next sampling event. Its 400 V/µs slew rate reduces the time required to traverse large output swings, and the 90 ns settling to 0.1% for a 10 V step is useful in pulse, edge, and timing measurement systems. According to the manufacturer summary, the device’s single-gain-stage construction is optimized for outstanding settling behavior. Layout remains critical: feedback components should be placed close to the relevant channel, grounding should minimize loop area, and source and load impedances should be checked because very fast amplifiers can excite unintended board or cable resonances.
Recomendado
Precision Instrumentation
The LT1209CS can serve as a fast instrumentation amplifier when the design needs a combination of high closed-loop bandwidth, slew rate, and useful DC gain characteristics. The listed DC gain is 7 V/mV, and the datasheet summary identifies reduced input offset voltage and higher DC gain than comparable bandwidth parts. It is therefore appropriate for bridge, sensor, and measurement interfaces that require faster response than a general-purpose device while remaining simpler than a dedicated monolithic instrumentation amplifier. Input bias current, offset behavior over temperature, common-mode range, and noise should be verified from the complete manufacturer datasheet for the exact design because those values were not reproduced in the supplied search excerpts.
Recomendado
Communications Signal Conditioning
The LT1209CS is applicable to communications and video-style signal-conditioning stages that benefit from a 45 MHz gain-bandwidth product and 400 V/µs slew rate. Its four channels allow several related small-signal paths to be handled in one 16-lead SOIC package, which can simplify board allocation compared with four separate single-amplifier packages. According to the Analog Devices LT1208/LT1209 product information, the device’s fast settling makes it appropriate for data-acquisition and related high-speed signal-chain work. For communications equipment, engineers must still examine output swing, load impedance, channel-to-channel behavior, and stability with realistic cables or connectors; speed alone does not guarantee acceptable distortion in every signal standard.
Recomendado
Datos de referencia de ingeniería para LT1209CS — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto |
|---|---|
| Package | 16-lead SOIC, PDSO16 |
| Brand | Analog Devices |
| Amplifier Type | Operational Amplifier |
| Number of Channels | 4 circuits |
| Gain-Bandwidth Product | 45 MHz |
| Slew Rate | 400 V/µs |
| DC Gain | 7 V/mV |
| Maximum Input Offset Voltage | 3 mV in the manufacturer-family datasheet summary; 5000 µV in the FindIC specification |
| Settling Time | 90 ns to 0.1% for a 10 V step |
| Supply Current | 7 mA per amplifier |
| Supply Voltage Span | 5 V to 30 V |
| Minimum Output Swing | ±12 V into 500 ohms |
| Unity-Gain Stability | Yes |
| Reference Price as of 2026-10-28 | $6.67 |
Diferenciadores clave
- Provides four high-speed amplifier channels in one package (frente a LT1208CS)
- Combines 45 MHz bandwidth with a 400 V/µs slew rate (frente a General-purpose operational amplifiers)
- Uses a unity-stable single-gain-stage architecture (frente a General-purpose multi-stage operational amplifiers)
Notas de diseño
Route each feedback loop as a compact, continuous path around the relevant amplifier channel, and place input, feedback, and compensation components close to the device. The LT1209CS has 45 MHz gain-bandwidth product and 400 V/µs slew rate, so PCB parasitic capacitance that would be negligible at lower frequencies can alter stability or settling behavior. Use a continuous ground plane, avoid routing sensitive inputs alongside high-speed outputs, and evaluate the final board with the intended source and load impedances rather than relying only on schematic simulations.
Budget the LT1209CS as a 7 mA-per-amplifier load, or up to 28 mA across four channels under the quoted operating condition, before adding input and output current effects. The 5 V to 30 V total supply span permits different rail arrangements, but the external circuitry must tolerate the selected operating voltage. Place supply-decoupling capacitors close to the pins and provide adequate source capability for fast output current. Because the device trades supply current for high slew rate and rapid settling, reducing the power budget may require changing the amplifier rather than merely lowering a supply rail.
Do not assume that the nominal 45 MHz gain-bandwidth product can be used as a 45 MHz closed-loop filter or amplifier bandwidth. Stable closed-loop bandwidth must remain below that limit after accounting for gain, feedback impedance, loading, and parasitic capacitance. Also verify output swing against the load: the available summary lists ±12 V minimum output swing into 500 ohms, which may not satisfy every load. Finally, do not substitute the dual LT1208CS or a suffix-only ordering listing for the quad LT1209CS without verifying channel count, pinout, package, and termination.
Información de cumplimiento
The supplied verified web data does not state RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status for LT1209CS. The analogous LT1209CS#PBF ordering suffix appears in a distributor result, but it is not treated as proof of the base part's compliance status without an authoritative ordering or declaration table.
