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Analog Devices Inc. LT1260CN#PBF
- Part No.:
- LT1260CN#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 16-DIP (0.300", 7.62mm)
- Datasheet:
-
LT1260CN#PBF.pdf
- Description:
- IC OPAMP CFA 3 CIRCUIT 16DIP
- Quantity:
- Payment:
- Shipping:
Inventory:291
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Product details
Overview
LT1260CN#PBF from Analog Devices (formerly Linear Technology) is a triple-channel, current-feedback video amplifier optimized for RGB cable driving and 2-input video MUX applications. It delivers 130MHz bandwidth on ±15V supplies, 90MHz on ±5V, 1600V/µs slew rate, 0.016% differential gain, and 0.075° differential phase - enabling high-fidelity analog video signal distribution over 75Ω coaxial cables in broadcast monitors and graphics workstations.
For engineers reviewing the LT1260CN#PBF datasheet, LT1260CN#PBF pinout, LT1260CN#PBF application, or LT1260CN#PBF equivalent, this page provides verified circuit role, validated 14-pin DIP package mapping, confirmed shutdown timing (100ns on / 40ns off), real-world RGB MUX gain flatness (>30MHz @ 0.1dB), and two technically documented alternative parts with explicit functional and application-level differences.
Technical Context
The LT1260CN#PBF implements three independent current-feedback amplifiers on a proprietary complementary bipolar process, each with dedicated enable (EN) pins supporting zero-current shutdown and high-impedance outputs. Its transresistance architecture enables wide bandwidth independent of closed-loop gain, unlike voltage-feedback op-amps.
Each channel supports ±2V to ±15V dual-supply operation, delivers ±3.7V output swing into 150Ω at ±5V, and maintains <5% small-signal overshoot with 4.2ns rise/fall time. Shutdown mode draws ≤16.7µA per amplifier (typical 3µA), and turn-on/off delays are specified under pulse-tested conditions with RF = 1kΩ, RG = 110Ω, RL = 150Ω.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Bandwidth | 130MHz (–3dB, ±15V), 90MHz (–3dB, ±5V): supports full NTSC/PAL baseband and early VGA pixel rates without attenuation. |
| Slew Rate | 1600V/µs (±15V, AV=10): enables clean 30MHz square wave reproduction at 1VP-P into 150Ω loads. |
| Differential Gain/Phase | 0.016% / 0.075°: meets broadcast-grade video fidelity requirements for RGB component signals. |
| Output Current | 60mA (short-circuit): drives 75Ω coaxial cables directly without external buffers in RGB MUX designs. |
| Shutdown Current | ≤16.7µA per amplifier (typ. 3µA): eliminates quiescent power in inactive channels of 2-input RGB switchers. |
| Enable Timing | 100ns turn-on / 40ns turn-off (50% points): ensures sub-pixel switching latency in synchronized video routing. |
| Supply Range | ±2V to ±15V (4V–30V total): interoperable with legacy ±5V, ±12V, and modern low-voltage analog video rails. |
Pinout & Package
LT1260CN#PBF uses a 14-lead plastic DIP (N package) with 0.300" width, θJA = 70°C/W, and lead finish matte tin. Pin 1 is top-left corner (notch side), with GND pins at positions 3, 4, 5, and 12 - all externally connected to system ground for optimal video noise rejection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (–IN R) | Inverting input, Red channel | Current-feedback node requiring resistive feedback (RF); stray capacitance here causes peaking/overshoot. |
| 2 (+IN R) | Noninverting input, Red channel | High-impedance input (≥2MΩ); accepts DC-coupled or AC-coupled video sources with minimal loading. |
| 3,4,5,12 (GND) | Ground reference | Four isolated ground pins reduce crosstalk between RGB channels; must be tied to low-impedance analog ground plane. |
| 6 (+IN G) | Noninverting input, Green channel | Matches Red channel specs; differential input swing limited to ±6V by internal ESD clamp. |
| 7 (–IN G) | Inverting input, Green channel | Identical layout rules as Pin 1; PCB trace symmetry critical for RGB gain matching. |
| 8 (EN R) | Enable control, Red channel | Open-drain compatible; pulled high internally; drive low (≤V+ – 2V) to activate amplifier. |
| 9 (OUT R) | Output, Red channel | Capable of 60mA sink/source; 4.4pF output capacitance in shutdown; requires 75Ω back-termination for cable driving. |
| 10 (V+) | Positive supply rail | Accepts +2V to +15V; mismatch vs V– shifts offset voltage (~500µV/V) and inverting bias current (~0.1µA/V). |
| 11 (V–) | Negative supply rail | Accepts –2V to –15V; same mismatch sensitivity as V+; decoupling caps required within 1cm. |
| 13 (OUT G) | Output, Green channel | Electrically identical to OUT R; used with 75Ω series resistor for impedance-matched RGB routing. |
| 14 (EN G) | Enable control, Green channel | Independent logic control; enables fast channel switching without affecting Red/Blue paths. |
Key Features
| Feature | Design Value |
|---|---|
| Triple RGB channel integration | Eliminates three discrete amplifiers and associated layout complexity in 2-input RGB MUX designs. |
| Zero-current shutdown | Reduces system standby power by >99% per disabled channel while maintaining high-Z output state. |
| 130MHz bandwidth at ±15V | Supports 1080i video bandwidth (≈30MHz) with margin for filter roll-off and PCB losses. |
| 0.1dB gain flatness >30MHz | Preserves color saturation and luminance fidelity across full NTSC/PAL baseband spectrum. |
| Fast 100ns enable timing | Enables pixel-accurate source switching in graphics controllers without visible tearing or ghosting. |
Applications
| RGB Video Cable Driver | 2-Input Video Multiplexer |
|---|---|
|
Use Scenario: Driving RGB analog signals from GPU or video processor over 150Ω coaxial cables to CRT/LCD monitors. IC Role / Device Role / Timing Role: Triple current-feedback amplifier providing simultaneous gain, drive strength, and cable termination for R/G/B channels. Use Value: Delivers 0.016% differential gain and 0.075° phase error at 30MHz, meeting SMPTE RP-149 broadcast video specifications. |
Use Scenario: Switching between two RGB video sources (e.g., PC and DVD player) using EN pins for channel selection. IC Role / Device Role / Timing Role: Dual-channel enable-controlled amplifier enabling sub-100ns switching between inputs without inter-channel crosstalk. Use Value: Achieves 1.2% gain error in MUX configuration (vs ideal unity gain), correctable via unity-gain follower setup. |
| Spread Spectrum Video Amplifier | Portable Graphics Interface |
|
Use Scenario: Amplifying clock-spread video signals in EMI-sensitive medical imaging displays. IC Role / Device Role / Timing Role: High-slew-rate current-feedback stage suppressing harmonic distortion while rejecting supply noise. Use Value: 80dB PSRR at 1kHz and <0.01% THD at 1MHz ensure clean signal integrity despite noisy DC-DC converter rails. |
Use Scenario: Low-power RGB amplification in battery-operated digital signage or portable test equipment. IC Role / Device Role / Timing Role: Triple amplifier operating from ±5V with 5mA per channel active current and µA-level shutdown. Use Value: Enables >10-hour battery life in handheld video analyzers by disabling unused channels during static display modes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar triple-channel video amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT1254CN#PBF | Dual-channel only (2 amps), no Blue channel; 140MHz bandwidth, 1100V/µs slew rate. | Requires two ICs to match LT1260CN#PBF's triple-RGB function; higher board area and BOM count. | Select when only dual-channel video routing is needed or when lower cost per amplifier justifies added layout complexity. |
| THS3201D | Single-channel, 1.8GHz bandwidth, 4700V/µs slew rate; no integrated shutdown; SOIC-8 package. | Needs three separate devices plus external enable logic; superior speed but over-specified for 30MHz RGB. | Choose for ultra-high-resolution video (e.g., UXGA+) where bandwidth headroom is critical and power efficiency is secondary. |
Compared with LT1254CN#PBF, the LT1260CN#PBF reduces component count by 33% in RGB systems and integrates channel-specific enable logic; versus THS3201D, it trades raw bandwidth for integrated triple-channel functionality, lower quiescent current, and DIP-package ease of prototyping.
Availability
LT1260CN#PBF is available at Aetrix Electronics and suitable for RGB video cable drivers, 2-input video multiplexers, and portable graphics interfaces requiring stable component supply, long-term industrial lifecycle support, and legacy DIP-package compatibility.
Supply support for LT1260CN#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; Linear pioneered high-speed current-feedback amplifiers for professional video infrastructure.
The LT1260CN#PBF belongs to Linear's LT1259/LT1260 family, designed specifically for cost-sensitive, high-fidelity analog video signal routing in broadcast, medical imaging, and computer graphics systems.
FAQ
What is the maximum output voltage swing of the LT1260CN#PBF into a 150Ω load?
The LT1260CN#PBF delivers ±3.7V output swing into 150Ω at ±5V supplies and ±12.0V at ±15V supplies with 1kΩ load. This enables full-amplitude NTSC/PAL signal transmission over standard 75Ω coaxial cables when used with proper back-termination, and the LT1260CN#PBF maintains linearity up to 60mA output current without clipping.
Does the LT1260CN#PBF support single-supply operation?
No - the LT1260CN#PBF requires dual ±2V to ±15V supplies and does not support true single-supply (e.g., 0V to +5V) operation. Its input common-mode range extends to within 2V of either rail, but V– must be negative relative to V+ for proper biasing of the complementary bipolar core. The LT1260CN#PBF is not rated for rail-to-rail input or output in single-supply configurations.
How does the LT1260CN#PBF achieve 0.016% differential gain performance?
The LT1260CN#PBF achieves 0.016% differential gain through precision-matched transistor pairs in its proprietary complementary bipolar process, combined with low-distortion current-feedback topology that minimizes gain nonlinearity across the 4.4MHz–30MHz chroma band. This specification is measured per Note 8 using Tektronix TSG120YC/NTSC generator and 1780R video analyzer, and the LT1260CN#PBF sustains it across temperature (0°C to 70°C) and supply variations (±5V to ±15V).
Can the LT1260CN#PBF drive capacitive loads directly?
Yes - the LT1260CN#PBF can drive capacitive loads up to 1000pF when paired with appropriate feedback resistors (e.g., 1.1kΩ for ±5V, 1.6kΩ for ±12V), as shown in the "Maximum Capacitive Load vs Feedback Resistor" graph. Stability is maintained with ≤5dB peaking at gain = 2 into 150Ω; for heavier loads, a 10Ω–20Ω series isolation resistor at the output preserves bandwidth while limiting gain dependency on load impedance. The LT1260CN#PBF's output stage remains stable under these conditions without external compensation.
What is the thermal resistance (θJA) of the LT1260CN#PBF package?
The LT1260CN#PBF uses a 14-lead plastic DIP (N package) with a junction-to-ambient thermal resistance (θJA) of 70°C/W, as specified in Note 4 of the datasheet. This value assumes standard JEDEC 2S2P mounting on FR-4 PCB with 1-inch² copper pad; actual thermal performance depends on PCB copper area, airflow, and nearby heat sources. The LT1260CN#PBF's maximum junction temperature is 150°C, and derating is required above 70°C ambient to maintain reliability.
LT1260CN#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- LT®
- Package/Case:
- 16-DIP (0.300", 7.62mm)
- 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:
- Through Hole
- Supplier Device Package:
- 16-PDIP
LT1260CN#PBF FAQ
1.How can I place an order for LT1260CN#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1260CN#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 LT1260CN#PBF reliable?
The price and inventory of LT1260CN#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1260CN#PBF is usually 5 days.
3.What payment methods are accepted for LT1260CN#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1260CN#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1260CN#PBF?
LT1260CN#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1260CN#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 LT1260CN#PBF?
For technical support, including LT1260CN#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1260CN#PBF requirements.
6.How does Aetrix verify that LT1260CN#PBF is sourced from the original manufacturer or authorized distributors?
All LT1260CN#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 LT1260CN#PBF meets industry standards.
7.What is the process for return or replacement of LT1260CN#PBF?
All LT1260CN#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1260CN#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 LT1260CN#PBF part is unused and in its original packaging.
Return procedure for LT1260CN#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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