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Analog Devices Inc. LT1399CS#PBF
- Part No.:
- LT1399CS#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LT1399CS#PBF.pdf
- Description:
- IC OPAMP CFA 3 CIRCUIT 16SO
- Quantity:
- Payment:
- Shipping:
Inventory:139
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Product details
Overview
LT1399CS#PBF from Analog Devices (formerly Linear Technology) is a triple 300MHz current feedback amplifier with independent shutdown pins per channel, designed for high-speed RGB video cable driving, LCD display interfaces, and spread-spectrum portable equipment. It delivers 800V/µs slew rate, 30ns turn-on time, ±5V input differential limit, and operates from ±2V to ±6V supplies in a 16-pin SO package.
For engineers reviewing the LT1399CS#PBF datasheet, LT1399CS#PBF pinout, LT1399CS#PBF application, or LT1399CS#PBF equivalent, key selection criteria include its 300MHz bandwidth at AV = 1/2/–1, 0.1dB gain flatness to 150MHz, zero supply current in shutdown, high output drive (±80mA), and fast enable/disable timing critical for video multiplexing and dynamic power management.
Technical Context
The LT1399CS#PBF implements a current feedback architecture with three independent amplifiers sharing a common ±2V to ±6V supply range. Each channel features a dedicated EN pin controlling high-impedance output and true zero-current disable state, with 30ns turn-on and 40ns turn-off delay under ±5V operation.
Its transimpedance gain stage enables stable operation with external RF/RG resistors (e.g., 324Ω for AV = 2), delivering 300MHz –3dB bandwidth and 1.3ns small-signal rise time while maintaining 10% overshoot and 25ns 0.1% settling time at AV = –1 into 150Ω.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Bandwidth | 300MHz at AV = 1, 2, –1 (±5V); ensures full NTSC/PAL video signal fidelity up to 150MHz with 0.1dB flatness. |
| Slew Rate | 800V/µs at AV = 10, RL = 150Ω; supports clean 10MHz square waves with minimal distortion on 75Ω cables. |
| Supply Range | ±2V to ±6V (4V–12V total); compatible with standard ±5V systems and single 5V/0V rails with level-shifted enable logic. |
| Output Current | ±80mA per amplifier; drives 75Ω video loads, 150Ω back-terminated lines, or capacitive LCD panels directly. |
| Shutdown Current | 0µA per channel when EN = high; eliminates quiescent draw in inactive video channels or MUX states. |
| Enable Timing | 30ns turn-on / 40ns turn-off (50% points); enables sub-32ns channel switching in 3-input video MUX applications. |
| Input Voltage Range | ±3.5V (±5V supply); accommodates standard video signal swings without clipping or breakdown. |
Pinout & Package
LT1399CS#PBF is housed in a 16-lead narrow plastic SO (Small Outline) package with θJA = 100°C/W. Ground pins (3, 6, 12, 13) are not internally connected; best practice requires external grounding for optimal channel isolation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| –IN R (1) | Inverting input of red-channel amplifier | Requires resistive feedback (e.g., 324Ω) to OUT R for stable current-feedback operation. |
| +IN R (2) | Noninverting input of red-channel amplifier | Accepts RGB video signal; 75Ω coax termination recommended for impedance matching. |
| GND (3) | Ground reference (not internally connected) | Must be externally tied to system ground to minimize crosstalk between R/G/B channels. |
| –IN G (4) | Inverting input of green-channel amplifier | Shared feedback network design enables simultaneous RGB gain matching in matrix applications. |
| +IN G (5) | Noninverting input of green-channel amplifier | Direct interface to green video source; same termination and layout rules as +IN R. |
| GND (6) | Ground reference (not internally connected) | Independent grounding path improves isolation between R and G signal paths. |
| +IN B (7) | Noninverting input of blue-channel amplifier | Accepts blue video component; used with 75Ω termination and matched trace lengths. |
| –IN B (8) | Inverting input of blue-channel amplifier | Feedback node for blue channel; layout must minimize stray capacitance to avoid peaking. |
| EN B (9) | Enable control for blue-channel amplifier | Logic-low active; must be ≥3V below V+ for full shutdown; CMOS-compatible with 30µA input current. |
| OUT B (10) | Blue-channel output | Drives 75Ω cable or LCD panel; series resistor (e.g., 16.9Ω) isolates capacitive loads. |
| V– (11) | Negative supply rail | Typically –5V; supports split-supply operation; mismatch >1V increases offset voltage by ~600µV/V. |
| OUT G (12) | Green-channel output | High-speed output with 800V/µs slew rate; optimized for composite video or Y signal routing. |
| EN G (13) | Enable control for green-channel amplifier | Independent channel gating allows dynamic power reduction in multi-channel video systems. |
| V+ (14) | Positive supply rail | Typically +5V; supplies all three amplifiers; thermal design based on 100°C/W junction-to-ambient. |
| OUT R (15) | Red-channel output | Back-terminated 75Ω output; used in RGB-to-YUV matrix circuits with precise resistor matching. |
| EN R (16) | Enable control for red-channel amplifier | Enables/disables red channel independently; critical for RGB MUX switching with <32ns transition time. |
Key Features
| Feature | Design Value |
|---|---|
| Triple independent current feedback amplifiers | Enables simultaneous RGB signal processing in a single 16-pin SO package, reducing board space vs. discrete op-amp solutions. |
| 300MHz bandwidth with 0.1dB gain flatness to 150MHz | Preserves color fidelity and edge integrity in HD video signals without post-processing equalization. |
| 30ns turn-on / 40ns turn-off per channel | Supports real-time video source switching in broadcast equipment and KVM extenders with minimal glitching. |
| Zero supply current in shutdown mode | Eliminates standby power in unused video paths-critical for battery-powered portable displays and laptops. |
| ±80mA output drive into 150Ω | Directly drives long 75Ω coaxial cables or high-capacitance LCD column drivers without external buffers. |
| Low 4.6mA supply current per amplifier (active) | Reduces thermal load in dense video interface modules while maintaining high-speed performance. |
Applications
| RGB Video Cable Driver | 3-Input Video Multiplexer |
|---|---|
Use Scenario: Driving RGB analog signals over 150Ω back-terminated coaxial cables in desktop monitors and projectors. IC Role / Device Role / Timing Role: Triple current feedback amplifier providing gain, impedance matching, and cable drive capability per color channel. Use Value: Maintains 0.13% differential gain and 0.10° differential phase error at 3.58MHz, preserving color accuracy across 10m cable runs. | Use Scenario: Switching between three independent video sources (e.g., PC, game console, media player) in AV receivers. IC Role / Device Role / Timing Role: Integrated 3-input MUX with independent enable pins enabling sub-32ns channel transitions. Use Value: Eliminates need for external analog switches and buffer stages, reducing BOM count and signal path latency. |
| LCD Panel Driver Interface | Buffered RGB ↔ YUV Matrix Converter |
Use Scenario: Driving high-capacitance (≥300pF) XGA/UXGA LCD column electrodes requiring ±6V swing and fast settling. IC Role / Device Role / Timing Role: High-slew-rate buffer with output series resistor (16.9Ω) for capacitive load isolation. Use Value: Achieves 0.1% settling in 30ns for 6V step and 70ns for 12V step-enabling high-refresh-rate displays. | Use Scenario: Converting between RGB and YUV color spaces in video scalers, capture cards, and broadcast encoders. IC Role / Device Role / Timing Role: Precision gain-matched amplifier array implementing weighted summing and inversion functions. Use Value: Delivers accurate 0.3R + 0.59G + 0.11B luminance (Y) and color-difference (R-Y, B-Y) generation with <0.5% gain error. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed current feedback amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT1399HVCS#PBF | Wider supply range (±2V to ±7.5V), higher output swing (±6.7V), same pinout and bandwidth. | Required for ±7.5V systems or LCD panels needing >±5V drive; not drop-in for ±5V-only designs due to enable voltage threshold shift. | Select LT1399HVCS#PBF only when operating above ±6V or requiring >±5V output swing; otherwise LT1399CS#PBF is optimal for ±5V video interfaces. |
| LT1398CS#PBF | Dual-channel version (2 amps), identical specs per channel, same 16-pin SO package, no B-channel pins. | Suitable for dual-output applications (e.g., Y/C or stereo audio) but lacks third channel for full RGB support. | Choose LT1398CS#PBF for cost-sensitive dual-amplifier needs; use LT1399CS#PBF when all three RGB channels must be integrated in one device. |
Compared with LT1399HVCS#PBF and LT1398CS#PBF, the LT1399CS#PBF provides the optimal balance of triple-channel integration, ±5V compatibility, and video-optimized AC performance-making it the preferred choice for mainstream RGB video routing and LCD interface designs where supply headroom is constrained to ±6V max.
Availability
LT1399CS#PBF is available at Aetrix Electronics and suitable for RGB video cable driving, 3-input video multiplexing, and LCD panel interface applications requiring stable component supply, consistent parametric performance, and long-term industrial availability.
Supply support for LT1399CS#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. (ADI) is a global semiconductor leader specializing in high-performance analog, mixed-signal, and digital signal processing technologies.
The LT1399CS#PBF belongs to ADI's legacy Linear Technology high-speed amplifier product line, engineered specifically for demanding video signal conditioning, RGB interface, and high-fidelity analog multiplexing applications.
FAQ
What is the maximum supply voltage rating for the LT1399CS#PBF?
The LT1399CS#PBF has an absolute maximum total supply voltage (V+ to V–) of 12.6V, supporting operation from ±2V (4V) up to ±6V (12V) supplies. Exceeding ±6V risks permanent damage; for ±7.5V systems, the pin-compatible LT1399HVCS#PBF must be used instead. The LT1399CS#PBF datasheet specifies guaranteed operation only within this ±6V range.
Does the LT1399CS#PBF support single-supply operation?
Yes, the LT1399CS#PBF supports single-supply operation (e.g., 5V and 0V), with input common-mode range extending to 4.0V (high) and 1.0V (low) under those conditions. However, enable pin logic must be referenced appropriately: EN pins require ≥3V below V+, so for 5V/0V operation, EN should be pulled to 0V (not left floating) to ensure full shutdown and avoid partial conduction.
How does the LT1399CS#PBF achieve 0µA shutdown current per channel?
The LT1399CS#PBF uses a dedicated CMOS-compatible enable pin (EN) per amplifier that disconnects internal bias currents and forces the output into high-impedance state when driven high. When EN = V+, supply current drops to ≤100µA per channel (typical 0.1µA), effectively eliminating static power draw-verified across temperature and supply conditions in the official datasheet.
Can the LT1399CS#PBF drive 75Ω coaxial cable directly?
Yes, the LT1399CS#PBF is explicitly characterized for 75Ω cable driving: typical application circuits use 324Ω feedback and gain resistors to achieve AV = 2 with 75Ω back-termination, delivering 0.13% differential gain and 0.10° differential phase error at 3.58MHz. Layout best practices (short traces, ground plane clearance near RF/RG) are required to maintain this performance.
What is the purpose of the unconnected GND pins on the LT1399CS#PBF?
The four GND pins (3, 6, 12, 13) on the LT1399CS#PBF are not internally bonded; they exist solely for external grounding to improve channel-to-channel isolation and reduce crosstalk. Linear Technology's datasheet explicitly recommends connecting each to a low-impedance ground plane-especially under the IC body-to suppress noise coupling between R, G, and B signal paths in high-frequency video applications.
LT1399CS#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:
- 800V/µs
- Gain Bandwidth Product:
- 300 MHz
- -3db Bandwidth:
- 300 MHz
- Current - Input Bias:
- 10 µA
- Voltage - Input Offset:
- 1.5 mV
- Current - Supply:
- 4.6mA (x3 Channels)
- Current - Output / Channel:
- 80 mA
- Voltage - Supply Span (Min):
- 4 V
- Voltage - Supply Span (Max):
- 12 V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SO
LT1399CS#PBF FAQ
1.How can I place an order for LT1399CS#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1399CS#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 LT1399CS#PBF reliable?
The price and inventory of LT1399CS#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1399CS#PBF is usually 5 days.
3.What payment methods are accepted for LT1399CS#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1399CS#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1399CS#PBF?
LT1399CS#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1399CS#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 LT1399CS#PBF?
For technical support, including LT1399CS#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1399CS#PBF requirements.
6.How does Aetrix verify that LT1399CS#PBF is sourced from the original manufacturer or authorized distributors?
All LT1399CS#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 LT1399CS#PBF meets industry standards.
7.What is the process for return or replacement of LT1399CS#PBF?
All LT1399CS#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1399CS#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 LT1399CS#PBF part is unused and in its original packaging.
Return procedure for LT1399CS#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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