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Analog Devices Inc. LT1254CN#PBF
- Part No.:
- LT1254CN#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Video Amps and Modules
- Package:
- 14-DIP (0.300", 7.62mm)
- Datasheet:
-
LT1254CN#PBF.pdf
- Description:
- IC AMP CURRENT FEEDBACK 14DIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,922
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Product details
Overview
LT1254CN#PBF from Analog Devices (formerly Linear Technology) is a quad current-feedback video amplifier optimized for RGB and composite video signal conditioning. It delivers 90MHz bandwidth at ±5V, 0.03% differential gain error and 0.28° differential phase error into 150Ω loads, enabling high-fidelity analog video transmission in PC-to-workstation interconnects and broadcast-grade video routing systems.
For engineers reviewing the LT1254CN#PBF datasheet, LT1254CN#PBF pinout, LT1254CN#PBF application, or LT1254CN#PBF equivalent, key selection criteria include channel isolation (>94dB at 5MHz), ±2V to ±14V dual-supply flexibility, 250V/µs output slew rate at AV = 2, and compatibility with standard 14-pin DIP layouts for legacy video board upgrades.
Technical Context
The LT1254CN#PBF implements four independent current-feedback amplifier cells sharing only V+ and V− supply rails, achieving >94dB channel-to-channel isolation at 5MHz. Its transimpedance architecture enables flat 0.1dB bandwidth up to 30MHz and supports stable operation with 75Ω or 150Ω cable loads without external compensation.
Each amplifier features matched input bias currents (±IB = 1–100µA), rail-to-rail output swing capability (±3.7V into 150Ω at ±5V), and operates across 0°C to 70°C ambient temperature. The device uses standard quad op-amp pinout in 14-pin plastic DIP packaging, ensuring drop-in replacement for legacy video driver designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Bandwidth | 90MHz at ±5V supply - supports full NTSC/PAL video baseband and RGB timing without attenuation |
| Differential Gain Error | 0.03% at RL = 150Ω, VS = ±5V - preserves color fidelity in composite video systems |
| Differential Phase Error | 0.28° at RL = 150Ω, VS = ±5V - maintains chrominance timing accuracy |
| Output Slew Rate | 250V/µs at AV = 2 - ensures fast settling for high-resolution RGB transitions |
| Channel Isolation | >94dB at 5MHz - prevents crosstalk between RGB or Y/C channels |
| Supply Range | ±2V to ±14V (4V to 28V total) - accommodates legacy ±5V, ±12V, and modern low-voltage video rails |
| Power per Amplifier | 60mW at ±5V - enables quad-channel operation within thermal limits of DIP packages |
Pinout & Package
LT1254CN#PBF is housed in a 14-lead plastic DIP (N package) with 0.300-inch width, JEDEC MS-001 compliant footprint, and through-hole mounting. Thermal resistance θJA = 70°C/W enables operation up to 70°C ambient at full load.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT A | Amplifier A output - drives first video channel (e.g., Red or Y) |
| 2 | –IN A | Inverting input A - accepts inverted video signal or feedback network |
| 3 | +IN A | Noninverting input A - accepts primary video signal source |
| 4 | +IN B | Noninverting input B - accepts second video channel (e.g., Green or C) |
| 5 | –IN B | Inverting input B - provides feedback path for amplifier B |
| 6 | OUT B | Amplifier B output - drives second video channel |
| 7 | OUT C | Amplifier C output - drives third video channel (e.g., Blue or sync) |
| 8 | V− | Negative supply rail - common return for all four amplifiers |
| 9 | –IN D | Inverting input D - feedback node for fourth amplifier |
| 10 | OUT D | Amplifier D output - drives fourth channel (e.g., composite sync or auxiliary) |
| 11 | +IN D | Noninverting input D - input for fourth video signal |
| 12 | +IN C | Noninverting input C - input for third video signal |
| 13 | –IN C | Inverting input C - feedback node for amplifier C |
| 14 | V+ | Positive supply rail - common power for all four amplifiers |
Key Features
| Feature | Design Value |
|---|---|
| Quad current-feedback topology | Enables simultaneous RGB + sync driving with <94dB inter-channel isolation at 5MHz |
| 0.1dB flat bandwidth to 30MHz | Preserves edge integrity in 1080i/720p video signals without peaking or roll-off |
| 250V/µs output slew rate (AV = 2) | Supports sub-10ns rise/fall times for 1VP-P video steps into 150Ω |
| ±2V to ±14V supply range | Eliminates need for level-shifting circuitry when interfacing with mixed-voltage video subsystems |
| Industry-standard quad op-amp pinout | Allows direct replacement of LM324/LT1014-based video drivers without PCB redesign |
Applications
| RGB Video Distribution | Composite Video Line Driver |
|---|---|
Use Scenario: Driving RGBHV signals from graphics card outputs to multiple monitors or video switchers over 75Ω coaxial cables. IC Role / Device Role / Timing Role: Quad buffer amplifier providing gain-of-2, DC-coupled, low-distortion signal replication for red, green, blue, and horizontal sync channels. Use Value: Maintains 0.03% differential gain and 0.28° phase accuracy across all four channels, preventing color shift and timing skew in multi-display setups. |
Use Scenario: Amplifying NTSC composite video signals for distribution to CCTV recorders, modulators, or RF encoders. IC Role / Device Role / Timing Role: Single-supply or dual-supply video line driver delivering 1VPP into 75Ω terminated lines with minimal group delay variation. Use Value: Achieves 90MHz bandwidth and <−60dBc harmonic distortion at 4.43MHz, preserving luminance/chrominance separation in broadcast-quality feeds. |
| IF Stage Gain Block | Video Test Equipment Signal Path |
Use Scenario: Fixed-gain amplification in intermediate frequency stages of analog video processing equipment such as TBCs or standards converters. IC Role / Device Role / Timing Role: High-linearity gain block operating at AV = 1, −1, 2, 5, or 10 with stable phase response up to 30MHz. Use Value: Flat 0.1dB bandwidth to 30MHz and <0.1° phase nonlinearity enable precise IF signal conditioning without introducing timing jitter. |
Use Scenario: Signal conditioning in video waveform analyzers, vectorscopes, and calibration sources requiring traceable amplitude and phase fidelity. IC Role / Device Role / Timing Role: Precision reference amplifier with <15mV input offset and 55mA short-circuit output current for driving test fixtures and calibration loads. Use Value: Delivers 60mW per amplifier at ±5V with <100µA input bias current, enabling low-noise, low-drift signal paths for metrology-grade video measurement. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad video amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT1229CN#PBF | Higher performance: 130MHz bandwidth, 0.01% differential gain, but dual-channel only and higher quiescent current (12mA per amp) | Requires two devices to match LT1254CN#PBF's quad-channel count; better suited for high-end broadcast monitoring where ultimate linearity is critical | Select LT1229CN#PBF only when differential gain <0.01% is mandatory and board space allows dual-DIP placement |
| LMH6624MF/NOPB | Single-channel, voltage-feedback architecture; 1.5GHz GBW, lower noise (0.9nV/√Hz), but no guaranteed differential phase spec and requires external compensation | Not pin-compatible; suitable for discrete high-speed gain blocks but not drop-in video cable driver replacement | Choose LMH6624MF/NOPB for custom high-frequency IF amplifiers where layout control and noise floor dominate over production cost and ease of integration |
Compared with LT1229CN#PBF and LMH6624MF/NOPB, the LT1254CN#PBF uniquely balances quad-channel integration, industry-standard pinout, guaranteed video AC specs (differential gain/phase), and DIP package compatibility-making it optimal for cost-sensitive, high-volume analog video equipment upgrades without redesign.
Availability
LT1254CN#PBF is available at Aetrix Electronics and suitable for RGB video distribution, composite video line driving, IF stage gain blocks, and video test equipment requiring stable component supply across industrial and broadcast product lifecycles.
Supply support for LT1254CN#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, Inc. (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors for precision instrumentation, communications, and industrial applications.
The LT1254CN#PBF belongs to Linear Technology's legacy video amplifier product line, designed specifically for cost-effective, high-fidelity analog video signal conditioning in PC graphics, broadcast infrastructure, and professional video equipment.
FAQ
What is the maximum operating temperature for LT1254CN#PBF?
The LT1254CN#PBF has an operating temperature range of 0°C to 70°C. Its absolute maximum junction temperature is 150°C, and with θJA = 70°C/W in the 14-pin DIP package, sustained operation at 70°C ambient requires limiting power dissipation to ≤1.143W - verified in the manufacturer's thermal derating table for LT1254CN.
Does LT1254CN#PBF support single-supply operation?
Yes, the LT1254CN#PBF supports single-supply operation from 4V to 24V total supply range. When operated on a single rail (e.g., +12V and ground), the input common-mode range extends to within 2V of V−, and output swing reaches within 2.5V of either rail - confirmed by TPC02 and TPC03 in the official datasheet.
What is the channel-to-channel isolation specification for LT1254CN#PBF?
The LT1254CN#PBF provides >94dB channel-to-channel isolation at 5MHz, measured between any two amplifier sections sharing only V+ and V− supply pins. This value is explicitly stated in the introductory section of the datasheet and validated under typical video loading conditions (RL = 150Ω).
Can LT1254CN#PBF drive 75Ω coaxial cables directly?
Yes, the LT1254CN#PBF is specifically characterized to drive 75Ω and 150Ω video loads. Its 55mA maximum output current and 250V/µs slew rate ensure stable 1VPP signal delivery into double-terminated 75Ω cables - demonstrated in TA01 and TA02 application circuits with 620Ω feedback networks.
Is LT1254CN#PBF pin-compatible with other quad op-amps like LM324?
No - while the LT1254CN#PBF uses the industry-standard quad op-amp pinout (pin 1 = OUT A, pin 2 = –IN A, etc.), it is not electrically compatible with LM324 due to fundamental differences: LT1254CN#PBF is a current-feedback amplifier requiring specific feedback resistor values (e.g., 620Ω), whereas LM324 is voltage-feedback and unsuitable for high-speed video applications.
LT1254CN#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Package/Case:
- 14-DIP (0.300", 7.62mm)
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Active
- Applications:
- Current Feedback
- Output Type:
- -
- Number of Circuits:
- 4
- -3db Bandwidth:
- 270 MHz
- Slew Rate:
- 250V/µs
- Current - Supply:
- 6 mA
- Current - Output / Channel:
- 55 mA
- Voltage - Supply, Single/Dual (±):
- 4V ~ 28V, ±2V ~ 14V
- Mounting Type:
- Through Hole
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 14-PDIP
LT1254CN#PBF FAQ
1.How can I place an order for LT1254CN#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1254CN#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 LT1254CN#PBF reliable?
The price and inventory of LT1254CN#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1254CN#PBF is usually 5 days.
3.What payment methods are accepted for LT1254CN#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1254CN#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1254CN#PBF?
LT1254CN#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1254CN#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 LT1254CN#PBF?
For technical support, including LT1254CN#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1254CN#PBF requirements.
6.How does Aetrix verify that LT1254CN#PBF is sourced from the original manufacturer or authorized distributors?
All LT1254CN#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 LT1254CN#PBF meets industry standards.
7.What is the process for return or replacement of LT1254CN#PBF?
All LT1254CN#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1254CN#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 LT1254CN#PBF part is unused and in its original packaging.
Return procedure for LT1254CN#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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