LT1260IS - Triple 130MHz Current Feedback Amp | Analog Devices
MPN: LT1260IS ✓ ActiveLT1260IS Overview
A current-feedback operational amplifier is a high-speed voltage-amplifier topology whose closed-loop bandwidth depends primarily on the feedback resistor rather than the closed-loop gain. Current-feedback amplifiers are commonly used for video, communications, instrumentation, and other signal chains requiring large slew rate, low distortion, and reliable drive into low-impedance loads. The LT1260 family combines these characteristics with a triple amplifier configuration, allowing one device to support several independent channels.
The LT1260IS provides 90 MHz small-signal bandwidth, more than 30 MHz of 0.1 dB gain-flatness bandwidth, and a 1600 V/µs high slew rate. These figures distinguish it from general-purpose operational amplifiers whose bandwidth and transition performance are usually much lower. The combination is particularly useful when processing composite video, driving short cable runs, amplifying high-speed control signals, or operating several phase-related channels in compact equipment.
Each amplifier combines a current-feedback core with shutdown capability. When shutdown is asserted, the corresponding amplifier draws approximately 0 µA from the supply, reducing the overall power requirement of systems that do not need all three channels active. The architecture is intended to maintain linearity while driving cables and other low-impedance loads, making channel-to-channel implementation straightforward when identical gain-setting networks and routing practices are used.
Typical uses include RGB video amplification, low-impedance cable drivers, communications-interface signal conditioning, industrial control interfaces, and instrumentation. In a three-channel RGB application, the three amplifiers can process red, green, and blue signals in parallel while preserving consistent bandwidth and slew capability across the channels. The same arrangement can support three-coordinate control, test, or monitoring channels where independent outputs are required.
PCB implementation should prioritize short feedback loops, symmetrical routing, solid ground-plane continuity, and careful decoupling. Place the amplifier supply bypass capacitors close to the supply pins and keep feedback resistors close to the relevant output and inverting-input pins. Because a current-feedback amplifier relies on a low-impedance feedback network, route both sides of each feedback connection over continuous ground and avoid shared narrow copper paths between channels.
This page organizes the LT1260IS specifications, package information, practical application guidance, and verified same-footprint alternatives for faster engineering selection. It also highlights shutdown, bandwidth, gain-flatness, slew-rate, and power-consumption considerations that help engineers distinguish this triple current-feedback amplifier from lower-speed general-purpose devices.
Drop-in alternatives for LT1260IS — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
LT1260IS#PBF
✅ Drop-In📋 Reference alternative (not in catalog)
LT1260IS#TR
✅ Drop-In📋 Reference alternative (not in catalog)
LT1260CS#PBF
✅ Drop-In📋 Reference alternative (not in catalog)
LT1260CS#TRPBF
✅ Drop-In📋 Reference alternative (not in catalog)
LT1260IS Maximum Ratings & Electrical Characteristics
| Amplifier Type | Triple current-feedback operational amplifier |
| Number of Channels | 3 circuits |
| Nominal Characteristic Frequency | 130 MHz |
| Small-Signal Bandwidth | 90 MHz |
| Gain Flatness | 0.1 dB at greater than 30 MHz |
| Slew Rate | 1600 V/µs |
| Minimum Single-Supply Operation | 5 V |
| Maximum Total Supply Voltage | 30 V (±15 V) |
| Active Supply Current | 5 mA per amplifier |
| Shutdown Supply Current | 0 µA per amplifier |
| Shutdown Support | Yes, one shutdown control per amplifier |
| Package | 16-lead SOIC |
| Pin Count | 16 pins |
| Mounting Type | Surface mount |
| RoHS Status | unknown |
| REACH Status | unknown |
| AEC-Q100 Qualification | unknown |
LT1260IS 16-lead soic Pin Configuration Guide
Pin configuration for LT1260IS (16-lead soic package). This analog component features input, output, and power supply pins. Refer to the manufacturer datasheet for offset null, compensation, and enable pin configurations. Ideal for signal conditioning and amplifier circuits.
No detailed pinout data available for LT1260IS.
Refer to the datasheet for full pin configuration.
Typical Applications
LT1260IS is suitable for 6 applications: RGB Video Amplification, Low-Impedance Cable Drivers, Industrial Signal Conditioning, Communications Interface Conditioning, Precision Test and Measurement, Low-Power Multi-Channel Imaging.
RGB Video Amplification
The LT1260IS fits RGB video because it provides three independent 130 MHz current-feedback amplifiers in one 16-lead SOIC package. Its 90 MHz small-signal bandwidth, 0.1 dB gain flatness above 30 MHz, and 1600 V/µs slew rate preserve signal amplitude and transition rate across red, green, and blue channels. Each amplifier can use the same gain-setting network to reduce channel-to-channel variation. Keep the three feedback paths compact and route each channel to a separate connector or termination network.
Low-Impedance Cable Drivers
The LT1260IS is appropriate for short cable and low-impedance drive requirements because the current-feedback topology combines 90 MHz bandwidth with a 1600 V/µs slew rate. Its wide operating range from single 5 V to ±15 V supports both compact single-supply equipment and higher-voltage split-supply interfaces. Place the active output close to the cable connector, maintain a continuous ground return, and follow the datasheet termination guidance for the selected cable impedance.
Industrial Signal Conditioning
The LT1260IS can condition fast industrial control signals while reducing component count through three independent amplifier channels. The 130 MHz device class and 1600 V/µs slew rate provide ample dynamic range for edge-rich sensor, test, and actuator interfaces, while 5 mA active current per amplifier supports power-constrained equipment. A common analog ground plane and local supply bypass capacitors help preserve low-impedance feedback operation under switching loads.
Communications Interface Conditioning
The LT1260IS suits communications signal paths that need high slew rate and broad bandwidth without a single amplifier per channel. Its three channels can condition related transmit, receive, or clock signals, and the common SOIC-16 package simplifies routing between circuits. The 0.1 dB gain-flatness range above 30 MHz helps maintain amplitude consistency, while the 5 mA-per-amplifier active current supports portable or space-constrained equipment. Verify output swing and load limits at the selected supply voltage.
Precision Test and Measurement
The LT1260IS is useful in high-speed test and measurement front ends where probe, cable, or sensor loading requires higher bandwidth and slew rate than general-purpose amplifiers provide. Three channels can support signal conditioning, trigger shaping, or differential monitoring functions within one package. Its 130 MHz current-feedback architecture and 1600 V/µs slew rate help retain waveform fidelity, but the feedback resistor value and output loading must follow the manufacturer guidance to achieve the intended response.
Low-Power Multi-Channel Imaging
The LT1260IS suits imaging and monitoring systems that require three fast channels but do not always operate all channels continuously. Each active amplifier draws 5 mA, while a shutdown amplifier draws approximately 0 µA, allowing unused channels to be disabled. The 16-lead SOIC package keeps three channels compact, and the 130 MHz architecture supports video or high-speed sensor signals. Control shutdown sequencing so disabled outputs do not create unexpected loading or signal transients.
Engineering reference data for LT1260IS — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | LT1260IS#PBF | LT1260IS#TR | LT1260CS#PBF | LT1260CS#TRPBF |
|---|---|---|---|---|---|
| Brand | Analog Devices | Analog Devices | Analog Devices | Analog Devices | Analog Devices |
| Package | SOIC-16 | SOIC-16 | SOIC-16 | SOIC-16 | SOIC-16 |
| Number of Amplifiers | 3 | 3 | 3 | 3 | 3 |
| Characteristic Frequency | 130 MHz | 130 MHz | 130 MHz | 130 MHz | 130 MHz |
| Small-Signal Bandwidth | 90 MHz | 90 MHz | 90 MHz | 90 MHz | 90 MHz |
| Slew Rate | 1600 V/µs | 1600 V/µs | 1600 V/µs | 1600 V/µs | 1600 V/µs |
| Supply Range | 5 V to ±15 V | 5 V to ±15 V | 5 V to ±15 V | 5 V to ±15 V | 5 V to ±15 V |
| Active Supply Current | 5 mA per amplifier | 5 mA per amplifier | 5 mA per amplifier | 5 mA per amplifier | 5 mA per amplifier |
| Shutdown Supply Current | 0 µA per amplifier | 0 µA per amplifier | 0 µA per amplifier | 0 µA per amplifier | 0 µA per amplifier |
Key Differentiators
- Three independent high-speed amplifiers in one package (vs LT1260IS#PBF)
- Wide supply compatibility (vs LT1260CS#PBF)
- High slew rate for low-impedance drive (vs LT1260IS#TR)
Design Notes
Place each feedback resistor close to the associated inverting input and output pins, and keep the feedback loop physically short. Current-feedback amplifiers depend on a low-impedance feedback network, so long traces and shared resistive paths can alter bandwidth, stability, and channel balance. Route the three channels symmetrically, maintain continuous ground beneath the device, and avoid switching-current paths in the signal-ground return.
Bypass the supply pins locally with low-inductance ceramic capacitors and provide adequate energy storage for fast output transitions. The three amplifiers can each draw 5 mA while active, and each can be placed into shutdown at approximately 0 µA. Disable unused channels only after confirming the shutdown logic and ensuring that the associated signal-node state will not disturb neighboring circuitry. Maintain decoupling paths directly between the capacitor and supply pins.
Use the manufacturer feedback-resistor and output-loading guidance when setting gain and driving cables or low-impedance loads. The 1600 V/µs slew rate can produce fast edges, so account for connector, cable, and termination behavior rather than judging performance only from the 90 MHz bandwidth. Keep input and output paths short, provide a nearby ground reference, and test both rise and fall transitions with the intended loading arrangement.
Do not assume that equal schematic channels will have identical behavior unless their feedback networks, loading, and routing are matched. The three amplifiers share a package and power supply, and one channel can draw 5 mA while active, so supply distribution and thermal conditions should be checked across all operating modes. Also verify the exact LT1260IS orderable suffix before layout approval because lead finish, temperature grade, and production packing differ among the compatible variants.
Compliance Information
The LT1260IS is an Analog Devices linear amplifier rather than an automotive-qualified device. Exact RoHS, REACH, lead-free, halogen-free, and conflict-minerals status must be confirmed for the exact orderable suffix through the manufacturer's compliance documentation.
