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Analog Devices Inc. LT1259CS#PBF
- Part No.:
- LT1259CS#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LT1259CS#PBF.pdf
- Description:
- IC OPAMP CFA 2 CIRCUIT 14SO
- Quantity:
- Payment:
- Shipping:
Inventory:1,794
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Product details
Overview
LT1259CS#PBF from Analog Devices (formerly Linear Technology) is a dual-channel 130MHz current feedback amplifier with independent shutdown pins, designed for high-fidelity video signal distribution across 75Ω coaxial cables. It delivers 60mA output current, 1600V/µs slew rate, and 0.016% differential gain error at 30MHz - enabling clean RGB or composite video cable driving in broadcast and professional AV equipment.
For engineers reviewing the LT1259CS#PBF datasheet, LT1259CS#PBF pinout, LT1259CS#PBF application, or LT1259CS#PBF equivalent, key selection criteria include its ±5V to ±15V supply flexibility, 100ns turn-on time, high-impedance shutdown mode (0µA supply current), and SOIC-14 package compatibility with space-constrained video routing PCBs.
Technical Context
The LT1259CS#PBF implements a current feedback architecture with separate inverting and noninverting inputs per channel, enabling wide bandwidth independent of closed-loop gain. Its transresistance-based signal path supports stable operation with 1.1kΩ–1.6kΩ feedback resistors and 150Ω loads.
Each amplifier features an EN pin that places the output in high-impedance state and reduces supply current to ≤3µA when pulled high. Input stage ESD protection limits differential input swing to ±6V, while output saturation remains within ±2.5V on ±5V supplies into 150Ω.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Bandwidth | 130MHz (–3dB, ±12V, AV=2, RL=150Ω) - supports full NTSC/PAL baseband video spectrum without attenuation |
| Slew Rate | 1600V/µs (±15V, RF=1kΩ) - preserves fast edge integrity in square-wave video timing signals |
| Differential Gain/Phase | 0.016% / 0.075° (30MHz, RL=150Ω) - meets SMPTE RP-168 broadcast color fidelity requirements |
| Supply Range | ±2V to ±15V (4V–30V total) - operates from single 5V or split ±12V rails without level-shifting |
| Shutdown Current | ≤3µA per amplifier (VS=±15V, EN=high) - enables zero-power channel muting in MUX applications |
| Output Current | 60mA (short-circuit capable) - drives 75Ω video loads with ≥3.7Vpp swing on ±5V supplies |
| Turn-On/Off Time | 100ns / 40ns (AV=10, ±5V) - allows sub-microsecond RGB channel switching in 2-input MUX designs |
Pinout & Package
LT1259CS#PBF is housed in a 14-lead narrow SOIC (S package) with 1.27mm pitch, JEDEC MS-012AC compliant, θJA = 110°C/W. Pin 1 marked by notch or dot.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (–IN A) | Inverting input, Channel A | Current-summing node for feedback network; requires low-stray-capacitance layout |
| 2 (+IN A) | Noninverting input, Channel A | High-impedance voltage reference point; bias current ≤3µA at 25°C |
| 3 (GND) | Analog ground | Not internally connected; must be externally tied to system ground plane |
| 4 (GND) | Analog ground | Second dedicated ground pin for noise isolation between channels |
| 5 (GND) | Analog ground | Third ground pin; improves PSRR and reduces crosstalk in dual-channel operation |
| 6 (+IN B) | Noninverting input, Channel B | Independent video source input; identical specs to +IN A |
| 7 (–IN B) | Inverting input, Channel B | Separate feedback node; enables independent gain setting per channel |
| 8 (EN A) | Enable control, Channel A | Open-drain compatible; pulls low (≤2V below V+) to activate amplifier |
| 9 (OUT A) | Output, Channel A | Capable of 60mA sink/source; presents 4.4pF + 75kΩ impedance in shutdown |
| 10 (V+) | Positive supply rail | Accepts +2V to +15V; internal regulation ensures stable bias over range |
| 11 (GND) | Analog ground | Fourth ground connection; critical for maintaining CMRR >52dB |
| 12 (V–) | Negative supply rail | Accepts –2V to –15V; offset drift <30µV/°C over operating temperature |
| 13 (OUT B) | Output, Channel B | Electrically isolated from OUT A; crosstalk <–60dB at 10MHz |
| 14 (EN B) | Enable control, Channel B | Independent logic control; enables asynchronous channel gating |
Key Features
| Feature | Design Value |
|---|---|
| Current feedback topology | Enables constant 130MHz bandwidth across gains of 1–10 without compensation redesign |
| Independent shutdown per channel | Zero supply current and high-Z output allow true 2:1 video MUX with no DC blocking required |
| 75Ω cable drive optimization | Specified performance at RL=150Ω (dual-terminated) meets SMPTE 259M impedance matching |
| Low distortion at video frequencies | THD <0.01% at 10MHz, 2Vpp output ensures minimal color bleeding in RGB systems |
| Fast enable/disable timing | 100ns turn-on and 40ns turn-off support spread-spectrum clocking and portable equipment power gating |
Applications
| RGB Video MUX Driver | Composite Video Distribution |
|---|---|
Use Scenario: Switching between two RGB sources (e.g., PC and camera) feeding a single monitor via 75Ω coaxial cables. IC Role / Device Role / Timing Role: Dual-channel current feedback amplifier with independent EN pins acting as active 2:1 analog multiplexer and cable driver. Use Value: Eliminates need for external analog switches; maintains 0.016% differential gain for accurate color reproduction across both channels. |
Use Scenario: Broadcasting NTSC/PAL composite video from encoder to multiple downstream receivers over long coax runs. IC Role / Device Role / Timing Role: High-slew-rate buffer amplifying baseband CVBS signal while compensating for cable loss up to 30MHz. Use Value: Delivers 3.7Vpp output into 150Ω load on ±5V supplies, meeting SMPTE RP-168 amplitude and phase linearity standards. |
| Spread-Spectrum Clock Buffer | Portable AV Equipment Interface |
Use Scenario: Driving high-frequency clock signals (e.g., 27MHz pixel clock) across flexible PCB traces in LCD timing controllers. IC Role / Device Role / Timing Role: Low-jitter, high-bandwidth buffer with fast enable/disable for dynamic clock gating. Use Value: 100ns turn-on ensures precise synchronization; 1600V/µs slew rate preserves rise/fall times <4.2ns for clean edge delivery. |
Use Scenario: Signal conditioning in battery-powered HDMI-to-analog converters or USB-C AV dongles. IC Role / Device Role / Timing Role: Low-quiescent-current video amplifier supporting ±5V operation and rapid power cycling. Use Value: Draws only 4.5mA per channel on ±5V, and shuts down to ≤3µA - extending runtime in portable devices. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-channel current feedback amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT1252CS8#PBF | Single-channel, 100MHz bandwidth, no shutdown pin, SOIC-8 package | Lacks independent channel disable; requires two units for dual-channel MUX | Choose when board space permits discrete channel implementation and shutdown is unnecessary |
| ADA4860-1YRJZ-R7 | Single-channel, 520MHz bandwidth, 350V/µs slew rate, no shutdown, SOT-23-6 | Higher bandwidth but no enable control; unsuitable for MUX gating or power-sensitive designs | Prefer for ultra-high-speed single-ended video paths where low capacitance and small footprint are critical |
Compared with LT1252CS8#PBF and ADA4860-1YRJZ-R7, the LT1259CS#PBF uniquely integrates dual-channel operation, 130MHz bandwidth, and per-channel shutdown in a single SOIC-14 - reducing component count and PCB area in RGB MUX and portable video systems.
Availability
LT1259CS#PBF is available at Aetrix Electronics and suitable for RGB video MUX drivers, composite video distribution systems, and portable AV interface designs requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for LT1259CS#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 and maintains full product support, datasheets, and application notes for legacy Linear parts including the LT1259 series.
The LT1259CS#PBF belongs to Linear Technology's high-speed video amplifier product line, engineered specifically for broadcast-quality analog video signal routing, cable driving, and MUX applications with stringent differential gain/phase requirements.
FAQ
What is the maximum operating frequency of the LT1259CS#PBF for video signal amplification?
The LT1259CS#PBF achieves a –3dB bandwidth of 130MHz under ±12V supply conditions with AV=2 and RL=150Ω, and maintains 0.1dB gain flatness beyond 30MHz - making it suitable for full-spectrum NTSC, PAL, and standard-definition RGB video amplification without equalization.
Does the LT1259CS#PBF support single-supply operation?
Yes, the LT1259CS#PBF supports single-supply operation from +4V to +30V total (e.g., +5V and GND), though its specified performance - including input common-mode range and output swing - is optimized for split-supply configurations such as ±5V or ±12V used in professional video equipment.
How does the shutdown function work on the LT1259CS#PBF?
Each channel of the LT1259CS#PBF has a dedicated EN pin: pulling EN high (≥V+ − 2V) disables the amplifier, reducing supply current to ≤3µA and placing the output in high-impedance state. Pulling EN low (≤2V above V−) enables normal operation with 5mA typical supply current per channel.
Can the LT1259CS#PBF drive 75Ω coaxial cable directly?
Yes, the LT1259CS#PBF is explicitly characterized for 150Ω load (dual-terminated 75Ω cable) with guaranteed differential gain of 0.016% and phase error of 0.075° at 30MHz, meeting SMPTE RP-168 broadcast video specifications - no external termination or buffering is required.
What is the thermal resistance (θJA) of the LT1259CS#PBF in its SOIC-14 package?
The LT1259CS#PBF in the 14-lead narrow SOIC (S package) has a junction-to-ambient thermal resistance (θJA) of 110°C/W, as specified in the Absolute Maximum Ratings table - requiring appropriate copper pour and airflow for continuous 60mA output operation at elevated ambient temperatures.
LT1259CS#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- LT®
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- Current Feedback
- Number of Circuits:
- 2
- Output Type:
- -
- Slew Rate:
- 1600V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 130 MHz
- Current - Input Bias:
- 20 µA
- Voltage - Input Offset:
- 2 mV
- Current - Supply:
- 5mA (x2 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:
- Surface Mount
- Supplier Device Package:
- 14-SO
LT1259CS#PBF FAQ
1.How can I place an order for LT1259CS#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1259CS#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 LT1259CS#PBF reliable?
The price and inventory of LT1259CS#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1259CS#PBF is usually 5 days.
3.What payment methods are accepted for LT1259CS#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1259CS#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1259CS#PBF?
LT1259CS#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1259CS#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 LT1259CS#PBF?
For technical support, including LT1259CS#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1259CS#PBF requirements.
6.How does Aetrix verify that LT1259CS#PBF is sourced from the original manufacturer or authorized distributors?
All LT1259CS#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 LT1259CS#PBF meets industry standards.
7.What is the process for return or replacement of LT1259CS#PBF?
All LT1259CS#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1259CS#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 LT1259CS#PBF part is unused and in its original packaging.
Return procedure for LT1259CS#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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