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Analog Devices Inc. LT1260CS#PBF
- Part No.:
- LT1260CS#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LT1260CS#PBF.pdf
- Description:
- IC OPAMP CFA 3 CIRCUIT 16SO
- Quantity:
- Payment:
- Shipping:
Inventory:2,082
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Product details
Overview
LT1260CS#PBF from Analog Devices (formerly Linear Technology) is a triple 130MHz current feedback amplifier optimized for RGB video cable driving, featuring independent shutdown pins per channel, ±5V to ±15V supply operation, 1600V/µs slew rate, and 0.016% differential gain error at 30MHz into 150Ω. It enables compact 2-input RGB MUX systems with sub-100ns channel switching.
For engineers reviewing the LT1260CS#PBF datasheet, LT1260CS#PBF pinout, LT1260CS#PBF application, or LT1260CS#PBF equivalent, key selection criteria include its 14-pin SOIC package, fast 40ns turn-off time, high-output-current capability (60mA), and verified performance in composite video, spread-spectrum, and portable RGB signal path designs.
Technical Context
The LT1260CS#PBF implements a proprietary complementary bipolar current feedback architecture with three independent amplifiers sharing a common 14-pin narrow SOIC footprint. Each channel features separate enable (EN) inputs that drive outputs to true high-impedance state with zero supply current when disabled.
Its bandwidth scales with supply voltage and external feedback resistor values-achieving 93MHz at ±5V and 130MHz at ±12V with RL = 150Ω and AV = 2. Input stage ESD clamping limits differential input swing to ±6V, while output stage delivers ±3.7V swing into 150Ω at ±5V supplies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Bandwidth | 130MHz (–3dB, ±12V, AV=2, RL=150Ω); supports full NTSC/PAL video baseband without roll-off |
| Slew Rate | 1600V/µs (±15V, RF=1k, RL=1k); ensures clean 30MHz square wave reproduction on coaxial cable |
| Differential Gain/Phase | 0.016% / 0.075° (±12V, RL=150Ω); meets broadcast-grade video fidelity requirements |
| Output Current | 60mA (short-circuit pulse-tested); drives 75Ω back-terminated RGB lines with margin |
| Shutdown Current | 0µA per channel (EN high); eliminates quiescent power in inactive channels of MUX systems |
| Turn-On/Turn-Off Time | 100ns / 40ns (AV=10, ±5V); enables rapid channel selection in 2-input RGB MUX applications |
| Supply Range | ±2V to ±15V (4V–30V total); operates from single 5V or dual ±12V rails without level-shifting |
Pinout & Package
LT1260CS#PBF uses a 14-lead narrow SOIC package (S14 package code), 3.9mm × 8.7mm body, 1.27mm pitch, with exposed pad not electrically connected. Pin 1 marked by notch or dot; pin numbering follows standard SOIC convention (counterclockwise from top-left).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (–IN R) | Inverting input - Red channel | Current feedback node; requires resistive feedback to OUT R for stability |
| 2 (+IN R) | Noninverting input - Red channel | High-impedance input (25MΩ @ ±5V); accepts DC-coupled video signals |
| 3 (GND) | Analog ground reference | Not internally connected; must be externally tied to system ground for optimal noise rejection |
| 4 (GND) | Analog ground reference | Dedicated ground pin for green channel; improves inter-channel isolation |
| 5 (GND) | Analog ground reference | Dedicated ground pin for blue channel; minimizes crosstalk in RGB layout |
| 6 (+IN G) | Noninverting input - Green channel | Matches +IN R electrical characteristics; supports identical RGB signal routing |
| 7 (–IN G) | Inverting input - Green channel | Matches –IN R; enables consistent feedback network design across all three channels |
| 8 (EN R) | Enable control - Red channel | Active-low logic interface; pulls to V– (or ≤2V below V+) to activate amplifier |
| 9 (OUT R) | Output - Red channel | Capable of ±3.7V swing into 150Ω; designed for direct connection to 75Ω coax |
| 10 (V+) | Positive supply rail | Accepts up to +15V; shared across all three amplifiers |
| 11 (GND) | Analog ground reference | Shared ground return for V– and output stages; critical for thermal stability |
| 12 (V–) | Negative supply rail | Accepts down to –15V; symmetrical or asymmetrical supplies supported |
| 13 (OUT B) | Output - Blue channel | Identical drive strength and settling behavior as OUT R and OUT G |
| 14 (EN B) | Enable control - Blue channel | Independent of EN R/EN G; allows per-channel power gating in RGB MUX |
Key Features
| Feature | Design Value |
|---|---|
| Triple RGB-optimized amplifier | Single 14-pin SOIC integrates full RGB driver with matched gain/phase response across R/G/B channels |
| Zero-current shutdown mode | Each channel draws 0µA when EN pin is high; eliminates standby power in multiplexed video systems |
| Fast enable/disable timing | 40ns turn-off ensures minimal glitching during RGB channel switching in MUX applications |
| Low differential distortion | 0.016% differential gain + 0.075° phase error preserves color fidelity in broadcast and graphics video |
| Wide supply flexibility | Operates from ±2V to ±15V; supports legacy ±12V systems and modern low-voltage portable designs |
Applications
| RGB Video MUX Driver | Composite Video Cable Driver |
|---|---|
|
Use Scenario: Switching between two RGB sources (e.g., PC and game console) feeding a single monitor via coaxial cables. IC Role / Device Role / Timing Role: Triple current feedback amplifier providing simultaneous R/G/B amplification and channel-selectable shutdown. Use Value: Enables <100ns channel switching with <2% gain error using two LT1260CS#PBFs-no external MUX IC required. |
Use Scenario: Driving long coaxial runs (up to 100m) carrying NTSC/PAL composite video signals. IC Role / Device Role / Timing Role: High-slew-rate buffer delivering flat frequency response up to 30MHz into 75Ω loads. Use Value: Maintains 0.016% differential gain and 0.075° phase error-meets SMPTE RP 168 broadcast compliance. |
| Spread Spectrum Video Amplifier | Portable Equipment Video Interface |
|
Use Scenario: Amplifying clock-dithered video signals in EMI-sensitive medical imaging displays. IC Role / Device Role / Timing Role: Low-noise current feedback amplifier with fast transient response suppressing spectral peaks. Use Value: 1600V/µs slew rate and 130MHz bandwidth suppress harmonics while preserving edge integrity. |
Use Scenario: Battery-powered handheld devices requiring low-power RGB output (e.g., portable projectors). IC Role / Device Role / Timing Role: Triple amplifier operating from ±5V with 5mA/channel active current and 0µA shutdown. Use Value: Reduces system power by >95% during display idle periods via per-channel EN control. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar triple current feedback amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT1254CS#PBF | Dual-channel (not triple); same 130MHz BW and 1600V/µs SR but lacks third amplifier and dedicated EN B pin | Requires two devices to match LT1260CS#PBF's RGB coverage; increases PCB area and BOM count | Select only if RGB functionality is unnecessary and dual-channel video buffering suffices |
| ADA4870ARZ | Single-channel, 1000V/µs slew rate, ±13V output swing into 150Ω; no integrated shutdown control | Needs external MOSFET switches and bias networks to replicate EN functionality; higher layout complexity | Prefer when ultra-high output current (>1A) is needed, not for integrated RGB MUX solutions |
Compared with LT1254CS#PBF and ADA4870ARZ, the LT1260CS#PBF uniquely delivers three matched, independently controllable amplifiers in one 14-pin SOIC-reducing component count, board space, and inter-channel skew in RGB systems where timing alignment and gain matching are critical.
Availability
LT1260CS#PBF is available at Aetrix Electronics and suitable for RGB video MUX drivers, composite video cable drivers, spread spectrum video amplifiers, and portable equipment video interfaces requiring stable component supply and long-term industrial availability.
Supply support for LT1260CS#PBF includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Analog Devices acquired Linear Technology in 2017 and maintains full product support, manufacturing, and documentation for the LT1260 family. Linear Technology pioneered high-speed current feedback amplifiers for video applications.
The LT1260 series was designed specifically for cost-sensitive, high-fidelity RGB and composite video signal distribution-emphasizing low differential distortion, fast enable/disable, and robust cable-driving capability in compact packages.
FAQ
What is the maximum load capacitance the LT1260CS#PBF can drive stably?
The LT1260CS#PBF can drive up to 100pF capacitive load when using a 1.1kΩ feedback resistor at ±5V supply (≤5dB peaking into 150Ω). For larger loads, add a 10Ω–20Ω series resistor at the output to isolate capacitance without degrading small-signal bandwidth. This value is validated in the "Maximum Capacitive Load vs Feedback Resistor" graph of the LT1259/LT1260 datasheet.
Does the LT1260CS#PBF support single-supply operation?
Yes-the LT1260CS#PBF operates from single supplies as low as +4V (±2V) up to +30V (±15V). When used in single-supply mode, the input common-mode range extends from 2V below V+ to 2V above V– (ground), and output swing reaches within 1.5V of each rail into 150Ω. Refer to the "Input Voltage Range" and "Maximum Output Voltage Swing" tables for exact values at your supply condition.
How does the LT1260CS#PBF achieve 0µA shutdown current?
The LT1260CS#PBF achieves true zero-supply-current shutdown by disconnecting internal bias currents and placing outputs in high-impedance state when the EN pin is pulled high (≥V+ − 2V). In this mode, the output behaves as a 4.4pF capacitor in parallel with a 75kΩ resistor-verified in the "Output Impedance in Shutdown vs Frequency" plot. No external pull-downs or leakage paths are required.
Can I use the LT1260CS#PBF for non-video applications like high-speed data line driving?
Yes-the LT1260CS#PBF's 130MHz bandwidth, 1600V/µs slew rate, and 60mA output current make it suitable for high-speed analog signal distribution beyond video, including LVDS fanout buffering, ADC/DAC interface conditioning, and pulse amplification. However, its current feedback topology requires strict adherence to resistive feedback networks-capacitive feedback or direct capacitive loading will cause instability unless compensated per the "Capacitance on the Inverting Input" section.
What is the thermal resistance (θJA) of the LT1260CS#PBF in its 14-pin SOIC package?
The LT1260CS#PBF in the 14-lead narrow SOIC (S14) package has a junction-to-ambient thermal resistance (θJA) of 110°C/W, as specified in Note 4 of the Absolute Maximum Ratings table. This value assumes standard JEDEC 2-layer board conditions (1 inch² copper pad). For sustained 60mA output into 150Ω at ±15V, junction temperature rise is ~33°C above ambient-well within the 150°C absolute max rating.
LT1260CS#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- LT®
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- Current Feedback
- Number of Circuits:
- 3
- Output Type:
- -
- Slew Rate:
- 1600V/µs
- Gain Bandwidth Product:
- 130 MHz
- -3db Bandwidth:
- 130 MHz
- Current - Input Bias:
- 20 µA
- Voltage - Input Offset:
- 2 mV
- Current - Supply:
- 5mA (x3 Channels)
- Current - Output / Channel:
- 60 mA
- Voltage - Supply Span (Min):
- 4 V
- Voltage - Supply Span (Max):
- 30 V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SO
LT1260CS#PBF FAQ
1.How can I place an order for LT1260CS#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1260CS#PBF on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for LT1260CS#PBF reliable?
The price and inventory of LT1260CS#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1260CS#PBF is usually 5 days.
3.What payment methods are accepted for LT1260CS#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1260CS#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1260CS#PBF?
LT1260CS#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1260CS#PBF order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for LT1260CS#PBF?
For technical support, including LT1260CS#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1260CS#PBF requirements.
6.How does Aetrix verify that LT1260CS#PBF is sourced from the original manufacturer or authorized distributors?
All LT1260CS#PBF products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LT1260CS#PBF meets industry standards.
7.What is the process for return or replacement of LT1260CS#PBF?
All LT1260CS#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1260CS#PBF, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The LT1260CS#PBF part is unused and in its original packaging.
Return procedure for LT1260CS#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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