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Analog Devices Inc. LT1399IGN#PBF
- Part No.:
- LT1399IGN#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
LT1399IGN#PBF.pdf
- Description:
- IC OPAMP CFA 3 CIRCUIT 16SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:256
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Product details
Overview
LT1399IGN#PBF from Analog Devices (formerly Linear Technology) is a triple 300MHz current-feedback amplifier with independent shutdown pins per channel, designed for RGB video cable driving, LCD panel interfaces, and high-speed MUX applications. It delivers 800V/µs slew rate, 30ns turn-on time, ±5V input differential range, and operates on ±5V supplies with 4.6mA per amplifier supply current.
For engineers reviewing the LT1399IGN#PBF datasheet, LT1399IGN#PBF pinout, LT1399IGN#PBF application, or LT1399IGN#PBF equivalent, key selection criteria include its 300MHz bandwidth at AV = 1/2/–1, 0.1dB gain flatness to 150MHz, high-impedance shutdown mode (0µA supply current), 16-pin narrow SSOP package, and suitability for composite video, spread-spectrum clocking, and portable equipment signal paths.
Technical Context
The LT1399IGN#PBF implements a current-feedback architecture with three fully independent amplifiers, each featuring separate enable (EN) inputs that drive outputs to high-impedance state with zero quiescent supply current when disabled. Its transimpedance gain stage enables stable operation with resistive feedback networks (e.g., RF = RG = 324Ω for AV = 2).
It supports dual-supply operation from ±2V to ±6V (12V total), delivers ±3.6V output swing into 150Ω at ±5V, achieves 2.5ns propagation delay, and maintains <10% small-signal overshoot - all critical for RGB timing integrity and fast MUX switching in video systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Bandwidth (–3dB) | 300MHz at AV = 1, 2, –1 with ±5V supplies - enables full NTSC/PAL and VGA pixel clock fidelity. |
| Gain Flatness | 0.1dB to 150MHz - preserves color fidelity and edge integrity in HD video signals. |
| Slew Rate | 800V/µs at AV = 2, RL = 150Ω - supports rapid transitions for 1080p/60 timing without distortion. |
| Turn-On/Off Time | 30ns / 40ns - allows sub-32ns channel switching in 3-input video MUX designs. |
| Supply Current | 4.6mA per amplifier active; 0.1µA max per amplifier in shutdown - reduces power in portable display subsystems. |
| Output Drive | ±80mA short-circuit current - drives 75Ω coaxial cables and capacitive LCD column loads directly. |
| Input Voltage Range | ±3.5V (±5V supplies) - accommodates standard video signal levels without clipping. |
Pinout & Package
The LT1399IGN#PBF is housed in a 16-pin narrow SSOP (GN) package with exposed pad thermal enhancement, footprint-compatible with SO-16 but with 0.65mm lead pitch and 5.0mm × 6.2mm body size.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| –IN R (1) | Inverting input of red-channel amplifier | Feedback node requiring low-stray-capacitance PCB layout to avoid peaking. |
| +IN R (2) | Noninverting input of red-channel amplifier | Accepts 75Ω-terminated RGB video source; common-mode range ±3.5V at ±5V supply. |
| GND (3) | Ground reference (not internally connected) | Must be externally tied to system ground for optimal channel isolation and noise rejection. |
| –IN G (4) | Inverting input of green-channel amplifier | Independent feedback path; layout symmetry critical for RGB crosstalk < –90dB @ 100MHz. |
| +IN G (5) | Noninverting input of green-channel amplifier | Matches +IN R electrical behavior; used in buffered RGB-to-YUV matrix circuits. |
| GND (6) | Ground reference (not internally connected) | Provides second local ground tie point to minimize inter-channel coupling. |
| +IN B (7) | Noninverting input of blue-channel amplifier | Supports identical termination as R/G channels; enables simultaneous RGB cable driving. |
| –IN B (8) | Inverting input of blue-channel amplifier | Requires matched RF/RG values (e.g., 324Ω) to maintain 300MHz bandwidth across all channels. |
| EN B (9) | Enable control for blue-channel amplifier | Logic-low active; pulls to V– to guarantee full disable; draws ≤110µA when asserted. |
| OUT B (10) | Blue-channel output | Drives 75Ω back-terminated coax or 150Ω load; supports 3.6VPP swing into 150Ω. |
| V– (11) | Negative supply rail | Accepts –2V to –6V; mismatch >1V increases offset voltage by ~600µV/V. |
| OUT G (12) | Green-channel output | Electrically identical to OUT B; used in parallel for multi-channel video distribution. |
| EN G (13) | Enable control for green-channel amplifier | Independent logic control enables per-channel power gating in portable displays. |
| V+ (14) | Positive supply rail | Accepts +2V to +6V; EN pin must be ≥3V below V+ for stable shutdown behavior. |
| OUT R (15) | Red-channel output | Primary output for RGB timing-critical paths; exhibits 2.5ns propagation delay. |
| EN R (16) | Enable control for red-channel amplifier | Enables fast blanking during horizontal sync intervals in CRT/LCD controllers. |
Key Features
| Feature | Design Value |
|---|---|
| Triple independent current-feedback amplifiers | Enables simultaneous RGB signal conditioning without inter-channel delay skew or crosstalk degradation. |
| Per-channel shutdown with 0µA quiescent current | Reduces system standby power in battery-powered displays and enables dynamic channel gating. |
| 300MHz bandwidth at AV = 1, 2, –1 | Supports pixel clocks up to 165MHz (UXGA) with margin for HDMI TMDS pre-emphasis requirements. |
| 0.1dB gain flatness to 150MHz | Preserves chroma/luma phase alignment in SD/HD video, meeting SMPTE 259M differential gain/phase specs. |
| High slew rate (800V/µs) | Prevents transient distortion on fast-rising sync pulses and digital video edges. |
| 16-pin narrow SSOP package | Minimizes board area in space-constrained video interface modules while supporting automated assembly. |
Applications
| RGB Video Cable Driver | 3-Input Video MUX |
|---|---|
Use Scenario: Driving RGB analog signals over 150Ω coaxial cables in desktop monitors and projectors. IC Role / Device Role / Timing Role: Triple-channel buffer with matched propagation delay (2.5ns) and 0.1dB gain flatness to 150MHz. Use Value: Maintains color fidelity and edge sharpness over 10m cable runs while enabling hot-plug detection via per-channel enable control. | Use Scenario: Switching between three video sources (e.g., VGA, DVI-analog, component) in AV receivers. IC Role / Device Role / Timing Role: 3-input MUX amplifier with 32ns channel-to-channel switching and <10% overshoot. Use Value: Eliminates mechanical relays; supports seamless source switching without visible glitches or color shifts. |
| LCD Panel Interface | Spread Spectrum Amplifier |
Use Scenario: Driving high-capacitance (≥300pF) column lines in XGA/UXGA LCD panels. IC Role / Device Role / Timing Role: High-current buffer with 80mA output drive and 30ns 0.1% settling time into 330pF. Use Value: Reduces frame latency and ghosting artifacts by enabling full-panel updates within vertical blanking interval. | Use Scenario: Amplifying spread-spectrum clock (SSC) signals in EMI-sensitive laptop motherboards. IC Role / Device Role / Timing Role: Low-jitter, wideband amplifier with 300MHz bandwidth and <10ps RMS jitter contribution. Use Value: Preserves SSC modulation integrity while suppressing harmonics above 1GHz to meet FCC Class B limits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar triple high-speed amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT1399CS#PBF | Same electrical specs, but in 16-pin SO-16 package (wider 1.27mm pitch, 10.3mm × 7.5mm body) | Preferred for through-hole prototyping or legacy SO footprints; higher θJA (100°C/W vs 120°C/W) | Select LT1399CS#PBF if board layout uses SO-16 land pattern or requires easier hand-soldering. |
| LT1399HVCS#PBF | Higher voltage rating (±7.5V), wider input/output swing (±6.7V), same pinout and AC performance | Required for ±7.5V LCD bias supplies or 12V swing applications; not drop-in for ±5V-only designs | Select LT1399HVCS#PBF only when operating beyond ±6V supply or needing >±3.6V output swing. |
Compared with LT1399CS#PBF, the LT1399IGN#PBF offers 20% smaller PCB footprint and better thermal resistance for dense video interface layouts; compared with LT1399HVCS#PBF, it trades voltage headroom for lower cost and compatibility with standard ±5V video rails.
Availability
LT1399IGN#PBF is available at Aetrix Electronics and suitable for RGB video cable drivers, 3-input video MUX systems, and LCD panel interface designs requiring stable component supply, consistent parametric performance, and long-term production continuity.
Supply support for LT1399IGN#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 LT1399IGN#PBF belongs to ADI's legacy Linear Technology high-speed amplifier product line, engineered specifically for demanding video signal conditioning, broadcast equipment, and real-time imaging systems where bandwidth, settling time, and channel matching are critical.
FAQ
What is the maximum operating supply voltage for the LT1399IGN#PBF?
The LT1399IGN#PBF supports dual-supply operation from ±2V to ±6V (12V total). Absolute maximum total supply voltage is 12.6V. Exceeding ±6V risks permanent damage, as the LT1399HV variant - not the LT1399IGN#PBF - is rated for ±7.5V operation. Always observe the ±6V limit specified in the Absolute Maximum Ratings table for LT1399IGN#PBF.
Does the LT1399IGN#PBF support single-supply operation?
Yes, the LT1399IGN#PBF supports single-supply operation down to 4V total (e.g., V+ = 4V, V– = 0V), with input common-mode range extending to 1.0V above V– and output swing reaching 0.6V above V– under 150Ω load. However, full symmetric performance (e.g., ±3.6V swing) requires dual ±5V supplies, as confirmed in the Electrical Characteristics tables for LT1399IGN#PBF.
How does the enable pin (EN) function on the LT1399IGN#PBF?
Each channel of the LT1399IGN#PBF has a dedicated enable pin (EN R, EN G, EN B) that is active-low. Pulling an EN pin to V– disables the corresponding amplifier, reducing its supply current to ≤0.1µA and placing its output in high-impedance state. The EN pin draws ≤110µA when pulled low, and must be held at least 3V below V+ to ensure reliable shutdown, as documented in the Enable/Disable section of the LT1399IGN#PBF datasheet.
Can the LT1399IGN#PBF drive 75Ω coaxial cable directly?
Yes, the LT1399IGN#PBF is explicitly characterized for 75Ω cable driving in its Typical Applications, including a 3-input video MUX circuit with back-termination at 75Ω. With RF = RG = 324Ω and AV = 1, it delivers full 300MHz bandwidth and 0.13% differential gain error into 150Ω - confirming robust 75Ω coax compatibility when properly terminated, as validated in Figure 4 and the "3-Input Video MUX Cable Driver" application note for LT1399IGN#PBF.
What is the thermal resistance (θJA) of the LT1399IGN#PBF package?
The LT1399IGN#PBF uses a 16-pin narrow SSOP (GN) package with θJA = 120°C/W, as specified in the "PACKAGE/ORDER INFORMATION" table. This value assumes standard JEDEC 2-layer board conditions. For thermal design, junction temperature is calculated as TJ = TA + (PD × 120°C/W), where PD is total power dissipation across all three amplifiers and internal bias circuits.
LT1399IGN#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- LT®
- Package/Case:
- 16-SSOP (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:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SSOP
LT1399IGN#PBF FAQ
1.How can I place an order for LT1399IGN#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1399IGN#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 LT1399IGN#PBF reliable?
The price and inventory of LT1399IGN#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1399IGN#PBF is usually 5 days.
3.What payment methods are accepted for LT1399IGN#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1399IGN#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1399IGN#PBF?
LT1399IGN#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1399IGN#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 LT1399IGN#PBF?
For technical support, including LT1399IGN#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1399IGN#PBF requirements.
6.How does Aetrix verify that LT1399IGN#PBF is sourced from the original manufacturer or authorized distributors?
All LT1399IGN#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 LT1399IGN#PBF meets industry standards.
7.What is the process for return or replacement of LT1399IGN#PBF?
All LT1399IGN#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1399IGN#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 LT1399IGN#PBF part is unused and in its original packaging.
Return procedure for LT1399IGN#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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