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Analog Devices Inc. LT1253CS8#TRPBF
- Part No.:
- LT1253CS8#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Video Amps and Modules
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LT1253CS8#TRPBF.pdf
- Description:
- IC AMP CURRENT FEEDBACK 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,311
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Product details
Overview
LT1253CS8#TRPBF from Analog Devices (formerly Linear Technology) is a dual 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 cable drivers and broadcast-grade video routing systems.
For engineers reviewing the LT1253CS8#TRPBF datasheet, LT1253CS8#TRPBF pinout, LT1253CS8#TRPBF application, or LT1253CS8#TRPBF equivalent, this page provides verified pin mapping, real-world video performance metrics, thermal derating guidance for SOIC-8 packaging, and validated alternatives for dual-channel video amplification with <30ns propagation delay and >94dB channel separation.
Technical Context
The LT1253CS8#TRPBF implements a current feedback architecture with separate high-impedance noninverting (+IN) and low-impedance inverting (–IN) inputs, enabling stable gain configurations from unity to 10 without external compensation. Its output stage delivers ±3.7V swing into 150Ω at ±5V supplies while maintaining 250V/µs slew rate in AV = 2 configuration.
Channel isolation exceeds 94dB at 5MHz due to fully isolated amplifier cores sharing only V+ and V– rails; thermal resistance is 150°C/W (junction-to-ambient, still air), requiring ambient derating above 59.7°C when delivering 2V into 150Ω at ±12V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Bandwidth | 90MHz at ±5V supply - supports full NTSC/PAL baseband video spectrum with <0.1dB flatness up to 30MHz. |
| Differential Gain Error | 0.03% at RL = 150Ω, VS = ±5V - preserves color saturation fidelity in composite video distribution. |
| Differential Phase Error | 0.28° at RL = 150Ω, VS = ±5V - maintains hue accuracy across NTSC signal transitions. |
| Supply Range | ±2V to ±14V (4V to 28V single) - enables operation from low-voltage portable gear to industrial ±12V systems. |
| Output Current | 55mA max - drives double-terminated 75Ω coaxial cables (150Ω load) without gain droop. |
| Channel Separation | 88dB at 10MHz - prevents crosstalk between RGB channels in multi-channel video interfaces. |
| Propagation Delay | 3.5ns at AV = 2, ±5V - ensures sub-pixel timing alignment in synchronized RGB video paths. |
Pinout & Package
LT1253CS8#TRPBF uses an 8-pin SOIC (S8) surface-mount package measuring 4.90mm × 3.90mm × 1.75mm (JEDEC MS-012), with standard dual op-amp pinout compatible with industry layout practices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT A | Inverting amplifier output A - drives first video channel (e.g., Red or Luma) with 250V/µs slew rate. |
| 2 | –IN A | Inverting input A - accepts feedback network (RG/RF) for precise gain setting in current-feedback topology. |
| 3 | +IN A | Noninverting input A - high-impedance (10MΩ) node for signal source connection with minimal loading. |
| 4 | V– | Negative supply rail - shared by both amplifiers; requires local 0.1µF ceramic bypass to ground. |
| 5 | V+ | Positive supply rail - shared by both amplifiers; decoupling critical for >90MHz stability. |
| 6 | –IN B | Inverting input B - second amplifier's feedback node, electrically isolated from Channel A except via power rails. |
| 7 | +IN B | Noninverting input B - independent high-Z input for second video channel (e.g., Green or Chroma). |
| 8 | OUT B | Inverting amplifier output B - delivers matched performance to OUT A for synchronous dual-channel operation. |
Key Features
| Feature | Design Value |
|---|---|
| Current Feedback Architecture | Enables wide bandwidth independent of closed-loop gain - 90MHz maintained at AV = 1, 2, 5, and 10 without compensation. |
| Low Power per Channel | 60mW at ±5V (11mA supply current) - reduces thermal load in dense video interface PCBs. |
| High Output Drive | ±3.7V swing into 150Ω at ±5V - eliminates need for external buffer stages in 75Ω cable driving. |
| Ultra-Low Distortion | –70dBc 2nd harmonic at 10MHz - preserves luminance/chrominance separation in composite video. |
| Thermal Protection Ready | Junction temperature limit 150°C with θJA = 150°C/W - supports continuous operation under video burst conditions. |
Applications
| RGB Video Distribution | Composite Video Routing |
|---|---|
|
Use Scenario: Driving RGBHV signals from graphics cards to monitors over 10m coaxial cables. IC Role / Device Role / Timing Role: Dual-channel voltage buffer with matched propagation delay (3.5ns) ensuring pixel-aligned Red/Green channel timing. Use Value: 90MHz bandwidth and 0.28° differential phase preserve color fidelity across full VGA/SXGA resolution. |
Use Scenario: Amplifying NTSC composite video in broadcast switchers before distribution to multiple outputs. IC Role / Device Role / Timing Role: Composite video gain block with 0.03% differential gain error to prevent hue shifts during level changes. Use Value: 94dB channel isolation prevents cross-color interference between adjacent video processing paths. |
| Video Test Equipment | Medical Imaging Interfaces |
|
Use Scenario: Signal conditioning in oscilloscope video input modules requiring flat frequency response. IC Role / Device Role / Timing Role: Precision video amplifier with 0.1dB flatness to 30MHz for calibrated waveform measurement. Use Value: Low 3pF input capacitance minimizes probe loading effects on high-frequency video test points. |
Use Scenario: Transmitting real-time ultrasound video from FPGA-based beamformers to display processors. IC Role / Device Role / Timing Role: High-slew-rate (250V/µs) driver for analog video output with sub-10ns settling to 10mV. Use Value: 55mA output current sustains 2Vpp signal integrity into long traces and connector parasitics. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel video amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LMH6702MA/NOPB | Higher 1.8GHz GBW but higher 18mA supply current per channel; requires external compensation for AV < 5. | Better for wideband IF gain blocks; less optimal for cost-sensitive RGB cable drivers due to power and layout complexity. | Choose LMH6702MA/NOPB when >500MHz small-signal bandwidth is required; LT1253CS8#TRPBF preferred for 90MHz video with lower power and simpler layout. |
| THS3202D | Lower 0.01% differential gain but narrower 75MHz bandwidth; higher 120mW/channel power dissipation. | Superior color fidelity at expense of bandwidth; unsuitable for 1080p RGB where >80MHz is needed. | Choose THS3202D only for legacy NTSC/PAL systems prioritizing differential gain over bandwidth; LT1253CS8#TRPBF balances both for modern analog video. |
Compared with LMH6702MA/NOPB and THS3202D, the LT1253CS8#TRPBF delivers optimal trade-off between 90MHz bandwidth, 0.03% differential gain, 60mW/channel power, and SOIC-8 footprint - making it the most cost-effective dual video amplifier for RGB cable driving and composite video routing where thermal density and board space are constrained.
Availability
LT1253CS8#TRPBF is available at Aetrix Electronics and suitable for RGB video distribution, composite video routing, and medical imaging interfaces requiring stable component supply, long-term lifecycle support, and traceable sourcing for industrial and broadcast equipment manufacturing.
Supply support for LT1253CS8#TRPBF 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, inheriting its precision analog portfolio including high-speed amplifiers for video, instrumentation, and communications.
The LT1253CS8#TRPBF belongs to Linear's legacy video amplifier product line, designed specifically for cost-sensitive, high-fidelity analog video signal conditioning in PC graphics, broadcast infrastructure, and test equipment.
FAQ
What is the maximum operating temperature for LT1253CS8#TRPBF in the S8 package?
The LT1253CS8#TRPBF has an operating temperature range of 0°C to 70°C. Its junction temperature must not exceed 150°C, and with θJA = 150°C/W, ambient temperature must be limited to ≤59.7°C when delivering 2V into 150Ω at ±12V to stay within safe thermal limits. Derating curves in the LT1253/LT1254 datasheet confirm this constraint for continuous video signal operation.
Does LT1253CS8#TRPBF support single-supply operation?
Yes, the LT1253CS8#TRPBF supports single-supply operation from 4V to 24V. Its input common-mode range extends to within 1.5V of either rail, and output swing reaches ±3.7V into 150Ω at ±5V - enabling use in 5V or 12V single-rail systems with appropriate DC biasing of inputs and loads.
What is the recommended feedback resistor value for LT1253CS8#TRPBF in AV = 2 configuration?
For AV = 2 in current-feedback configuration, the LT1253CS8#TRPBF datasheet specifies RF = RG = 620Ω with ±5V supplies and 150Ω load. This value ensures optimal bandwidth (92MHz), minimal peaking (0.1dB), and stable transient response per Figure TPC13 in the official datasheet.
How does LT1253CS8#TRPBF achieve 94dB channel separation?
The LT1253CS8#TRPBF achieves >94dB channel separation at 5MHz by fully isolating amplifier cores - only V+ and V– supply pins are shared between channels. This physical separation prevents signal coupling through substrate or internal bias networks, unlike monolithic quad amplifiers with shared internal nodes.
Is LT1253CS8#TRPBF pin-compatible with other dual op-amps in SOIC-8 packages?
Yes, the LT1253CS8#TRPBF uses the industry-standard dual op-amp pinout (pin 1 = OUT A, pin 2 = –IN A, pin 3 = +IN A, pin 4 = V–, pin 5 = V+, pin 6 = –IN B, pin 7 = +IN B, pin 8 = OUT B), matching SOIC-8 dual amplifiers like LM358, TL082, and AD822 - enabling drop-in replacement in existing layouts where bandwidth and video specs align.
LT1253CS8#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Applications:
- Current Feedback
- Output Type:
- -
- Number of Circuits:
- 2
- -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:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 8-SO
LT1253CS8#TRPBF FAQ
1.How can I place an order for LT1253CS8#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1253CS8#TRPBF 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 LT1253CS8#TRPBF reliable?
The price and inventory of LT1253CS8#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1253CS8#TRPBF is usually 5 days.
3.What payment methods are accepted for LT1253CS8#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1253CS8#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1253CS8#TRPBF?
LT1253CS8#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1253CS8#TRPBF 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 LT1253CS8#TRPBF?
For technical support, including LT1253CS8#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1253CS8#TRPBF requirements.
6.How does Aetrix verify that LT1253CS8#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT1253CS8#TRPBF 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 LT1253CS8#TRPBF meets industry standards.
7.What is the process for return or replacement of LT1253CS8#TRPBF?
All LT1253CS8#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1253CS8#TRPBF, 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 LT1253CS8#TRPBF part is unused and in its original packaging.
Return procedure for LT1253CS8#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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