LT1356CN - Quad 12MHz High-Speed Op Amp | Analog Devices
N.º de pieza: LT1356CN ✓ ActivoLT1356CN Descripción general
An operational amplifier is an active analog building block that amplifies the difference between its two input voltages. The LT1356 belongs to the voltage-feedback amplifier hierarchy, which also includes general-purpose precision op amps, instrumentation amplifiers, and buffer amplifiers. Its matched high-impedance inputs and bipolar complementary processing support accurate signal acquisition while preserving the slewing behavior associated with current-feedback amplifiers.
The principal features include 12 MHz gain-bandwidth product, 400 V/µs slew rate, 1.25 mA maximum supply current per amplifier, and operation from ±18 V according to the Arrow listing. The amplifier is unity-gain stable and supports capacitive loading through the C-Load operating approach. Input voltage noise is specified at 10 nV/√Hz, while maximum input offset voltage is 800 µV and maximum input bias current is 300 nA.
The LT1355/LT1356 family uses a voltage-feedback topology with matched high-impedance inputs and advanced bipolar complementary processing. Because the devices are unity-gain stable, they can be used directly as conventional voltage amplifiers without external compensation. Their combination of bandwidth, slew rate, and supply current is intended to provide a better performance balance than older devices with comparable bandwidth, although exact noise, offset, and bias-current values vary with the selected operating conditions.
Typical uses include low-power voltage-feedback stages, video and instrumentation signal chains, analog control loops, active filters, and general high-speed buffering. In instrumentation systems, the four amplifiers can implement multiple gain or filtering channels in one package. The 400 V/µs slew rate supports rapidly changing large-signal waveforms, while the 12 MHz bandwidth allows operation at substantially higher frequencies than low-bandwidth precision amplifiers.
When designing around the LT1356CN, verify the external circuit against the actual signal amplitude and frequency. Large outputs at high frequency can require more output-current capability than the small-signal parameters suggest, while capacitive loading can affect stability. The 14-pin PDIP package is not lead-free; compare this ordering option with the documented LT1356CN#PBF lead-free-finish variant when procurement rules require lead-free termination.
This page consolidates the verified manufacturer and distributor details, separates known LT1356CN data from missing parameters, and identifies a same-package ordering alternative. It also provides application guidance and design cautions that help engineers evaluate the amplifier without treating incomplete distributor metadata as an exact bill of materials.
Alternativas directas para LT1356CN — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
LT1356CN#PBF
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
LT1356CN Valores máximos y características eléctricas
| Amplifier Count | 4 amplifiers |
| Topología | Voltage feedback |
| Gain-Bandwidth Product | 12 MHz |
| Slew Rate | 400 V/µs |
| Maximum Supply Current per Amplifier | 1.25 mA |
| Supply Voltage Range | ±18 V |
| Unity-Gain Stability | Yes |
| Capacitive Load Drive | C-Load op amp drives all capacitive loads |
| Input Noise Voltage | 10 nV/√Hz |
| Maximum Input Offset Voltage | 800 µV |
| Maximum Input Bias Current | 300 nA |
| Encapsulado | 14-pin PDIP |
| Tipo de montaje | Through-hole |
Guía de configuración de pines de LT1356CN 14-pin pdip
Configuración de pines para LT1356CN (encapsulado 14-pin pdip). 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 LT1356CN.
Consulte la hoja de datos para ver la configuración completa de patillas.
Aplicaciones típicas
LT1356CN es adecuado para 6 aplicacións: Low-Power Instrumentation Signal Conditioning, Active Filters and Frequency Response Shaping, Video and Fast Analog Signal Paths, Sensor Buffering and Signal Acquisition, Precision Control and Feedback Loops, General-Purpose High-Speed Buffering.
Low-Power Instrumentation Signal Conditioning
The LT1356CN fits instrumentation signal conditioning because its four channels provide 12 MHz gain-bandwidth product, 400 V/µs slew rate, and unity-gain stability while limiting supply current to 1.25 mA per amplifier. Place the device between a sensor or low-level source and the following conversion stage when the channel must amplify signals above the bandwidth of a general-purpose precision amplifier. The verified 10 nV/√Hz input noise is also useful for low-level conditioning. Four amplifiers can form gain, inversion, buffering, and active-filter stages while reducing package count. Check source impedance, sensor loading, output swing, and settling requirements against the complete manufacturer electrical-characteristics table.
Recomendado
Active Filters and Frequency Response Shaping
The LT1356CN is appropriate for active filtering because its 12 MHz gain-bandwidth product supports higher-frequency closed-loop response than precision-only amplifiers, while unity-gain stability simplifies unity-gain buffer stages. Its 400 V/µs slew rate helps preserve large-signal amplitude when a filter processes fast transitions or square-wave-derived waveforms. The four channels allow repeated filter sections or combinations of gain, summation, and buffering on one device. Component tolerances and the op amp's actual gain-bandwidth and output-drive behavior should be used in the filter calculation. The manufacturer C-Load capability can also help when the filter drives a shielded input or long trace, subject to the specified operating conditions.
Recomendado
Video and Fast Analog Signal Paths
The LT1356CN can serve in video or fast analog signal paths where 12 MHz bandwidth and 400 V/µs slew rate are more useful than very low offset or drift. The amplifier's unity-gain stability supports noninverting and inverting video stages, while four channels can handle buffering, gain, synchronization, or active equalization. Video cable capacitance makes the verified C-Load capability relevant, but output-current requirements rise with frequency and amplitude. Confirm the required video bandwidth, output swing, settling time, channel-to-channel matching, and external gain/equalization network values in the manufacturer datasheet before finalizing the PCB.
Recomendado
Sensor Buffering and Signal Acquisition
The LT1356CN fits sensor buffering when the source requires greater bandwidth or faster settling than a conventional precision amplifier provides. Its matched high-impedance inputs reduce loading, while the verified 10 nV/√Hz input-noise specification supports low-level conditioning. The 12 MHz gain-bandwidth product can handle sensor signals well above audio-band frequencies, and the four channels permit parallel acquisition or auxiliary filtering. Input bias current is listed at up to 300 nA, so high-source-impedance sensors should be checked carefully for generated offset. The 1.25 mA-per-amplifier maximum supply current also makes the device suitable for compact, power-conscious measurement systems.
Recomendado
Precision Control and Feedback Loops
The LT1356CN can be used in control and feedback loops that need faster slew rate and bandwidth than a general-purpose op amp while remaining more economical than the highest-speed alternatives. Its 400 V/µs slew rate reduces large-signal delay, and unity-gain stability supports straightforward loop compensation. The maximum input offset voltage of 800 µV is the principal tradeoff: designs requiring very high DC accuracy should verify whether that value is acceptable for the control error budget. Likewise, the 1.25 mA maximum supply current per amplifier is useful for portable systems but may be insufficient for sustained high-output-current loads. Validate stability, output swing, and load requirements in the completed control topology.
Recomendado
General-Purpose High-Speed Buffering
The LT1356CN is useful as a general-purpose high-speed buffer when a source must drive a following stage through cabling, isolation, or filtering. Unity-gain stability avoids external compensation in the direct buffer configuration, while 12 MHz bandwidth and 400 V/µs slew rate provide headroom for rapidly changing signals. The family datasheet specifically identifies C-Load operation, making the amplifier relevant to capacitive cable and test-fixture loads. Four buffered channels can share one 14-pin PDIP package, although each output still needs independent stability and loading checks. Keep traces short, provide a suitable ground-return path, and confirm that the load capacitance and output waveform remain inside the manufacturer operating limits.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para LT1356CN — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | LT1356CN#PBF |
|---|---|---|
| Package | 14-pin PDIP | 14-pin PDIP - same |
| Brand | Analog Devices | Analog Devices |
| Amplifier Count | 4 amplifiers | 4 amplifiers |
| Topology | Voltage feedback | Voltage feedback |
| Gain-Bandwidth Product | 12 MHz | 12 MHz |
| Slew Rate | 400 V/µs | 400 V/µs |
| Maximum Supply Current per Amplifier | 1.25 mA | 1.25 mA |
| Supply Voltage | ±18 V | ±18 V |
| Input Noise Voltage | 10 nV/√Hz | 10 nV/√Hz |
| Maximum Input Offset Voltage | 800 µV | 800 µV |
| Unity-Gain Stable | Yes | Yes |
| Lead-Free Ordering Option | Not stated for nonsuffixed LT1356CN | Yes - PBF lead-free finish |
Diferenciadores clave
- Four high-speed amplifiers in one package (frente a LT1356CN#PBF)
- Low supply current for high-speed operation (frente a LT1356CN#PBF)
- Unity-gain-stable capacitive-load operation (frente a LT1356CN#PBF)
Notas de diseño
Do not infer that the 12 MHz gain-bandwidth product guarantees usable closed-loop bandwidth at every gain. The actual response also depends on noise gain, external compensation components, source impedance, and load. Likewise, the 800 µV maximum input offset voltage is significant in precision measurement paths. Use the LT1355/LT1356 electrical-characteristics tables and verify the completed circuit against the required DC error and settling-time budgets.
Route each amplifier's feedback components close to the corresponding pins to minimize parasitic capacitance and feedback-loop delay. Place input and output decoupling near the device and keep high-impedance input traces short and guarded against leakage. For a through-hole 14-pin PDIP layout, provide adequate ground-plane connection and consider bypassing each supply rail locally because the device combines four high-speed channels on one package.
Treat the verified C-Load capability as a design aid, not permission for arbitrary capacitive loading. Check the exact output current, frequency, cable capacitance, and stability behavior against the manufacturer's operating information. When driving a long line, terminate the line appropriately, isolate capacitive loading if necessary, and observe the output waveform with adequate bandwidth and probe loading. The 400 V/µs slew rate reduces transition time but does not eliminate ringing caused by an unsuitable load.
Budget the total supply demand using the verified maximum of 1.25 mA per amplifier, multiplied by four channels, plus output-current demand and regulator margin. The maximum supply-current specification is not the same as a guaranteed load-current rating at every output voltage and frequency. Use supply bypassing appropriate for high-speed amplification, verify startup behavior, and ensure the chosen source can support the amplifier's dynamic output demand without interacting with other sensitive analog rails.
Información de cumplimiento
The verified data identifies a related LT1356CN#PBF lead-free-finish ordering option, but it does not provide explicit RoHS, REACH, AEC-Q100, halogen-free, or conflict-minerals declarations for either exact ordering code.