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Analog Devices Inc. LT1259IN#PBF
- Part No.:
- LT1259IN#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-DIP (0.300", 7.62mm)
- Datasheet:
-
LT1259IN#PBF.pdf
- Description:
- IC OPAMP CFA 2 CIRCUIT 14DIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,095
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Product details
Overview
LT1259IN#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 maintains 0.1dB gain flatness beyond 30MHz - enabling precise RGB and composite video cable driving in broadcast and professional AV equipment.
For engineers reviewing the LT1259IN#PBF datasheet, LT1259IN#PBF pinout, LT1259IN#PBF application, or LT1259IN#PBF equivalent, key selection criteria include fast 100ns turn-on/40ns turn-off timing, ±2V to ±15V supply flexibility, differential gain of 0.016%, differential phase of 0.075°, and industrial-grade –40°C to +85°C operation confirmed for the IN package variant.
Technical Context
The LT1259IN#PBF implements a complementary bipolar current feedback architecture optimized for low-distortion, wideband video amplification. Its transresistance-based topology enables stable gain-setting with external RF/RG resistors and supports unity-gain and non-inverting configurations up to AV = 10 without peaking.
Each channel features independent enable (EN) logic that places the output in true high-impedance state with zero supply current draw during shutdown - critical for MUX applications requiring seamless channel switching and power gating in portable or spread-spectrum systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Bandwidth | 130MHz (–3dB, ±12V, RL = 150Ω, AV = 2) - supports full NTSC/PAL baseband video spectrum with margin. |
| Slew Rate | 1600V/µs (±15V supplies, RF = 1kΩ) - ensures minimal distortion on fast-rising video sync pulses and square waves. |
| Differential Gain / Phase | 0.016% / 0.075° - meets broadcast-grade color fidelity requirements for RGB and composite video routing. |
| Supply Range | ±2V to ±15V (4V–30V total) - compatible with legacy ±5V, ±12V, and modern low-voltage industrial rails. |
| Shutdown Current | 0µA per amplifier - eliminates quiescent drain in inactive channels, essential for battery-powered MUX designs. |
| Turn-On / Turn-Off Time | 100ns / 40ns - enables sub-microsecond channel switching in 2-input video multiplexers without visible artifacts. |
| Operating Temperature | –40°C to +85°C - specified and tested for industrial environments, distinct from commercial-grade CN/CS variants. |
Pinout & Package
LT1259IN#PBF is supplied in a 14-pin plastic DIP (N package) with 0.300″ wide body, rated for θJA = 70°C/W and junction temperature up to 150°C. Pin assignments are validated per LTC DWG #05-08-1510.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | –IN A | Inverting input of Amplifier A - requires resistive feedback to OUT A for stability; sensitive to stray capacitance. |
| 2 | +IN A | Noninverting input of Amplifier A - high-impedance node (≥2MΩ at ±5V); referenced to system ground. |
| 3 | GND | Analog ground reference for both amplifiers - must be connected directly to low-impedance ground plane. |
| 4 | GND | Second ground pin - isolated internally; improves PSRR and reduces crosstalk between channels. |
| 5 | GND | Third ground pin - dedicated to power return path; minimizes supply-induced noise coupling. |
| 6 | +IN B | Noninverting input of Amplifier B - electrically identical to +IN A; supports independent signal routing. |
| 7 | –IN B | Inverting input of Amplifier B - shares same layout rules as –IN A; avoid shared traces with other channels. |
| 8 | EN A | Enable control for Amplifier A - pulled high internally; drive ≤2V below V+ to activate; draws 60µA when enabled. |
| 9 | OUT A | Amplifier A output - capable of 60mA into short circuit; presents 4.4pF + 75kΩ load when disabled. |
| 10 | V+ | Positive supply rail - accepts ±2V to ±15V; mismatch >1V increases offset voltage by ~500µV/V. |
| 11 | GND | Fourth ground pin - provides additional return path for V– decoupling and output stage current. |
| 12 | V– | Negative supply rail - symmetrical to V+; allows single-supply operation with V– tied to ground. |
| 13 | OUT B | Amplifier B output - fully independent; supports simultaneous dual-channel video drive or MUX summing. |
| 14 | EN B | Enable control for Amplifier B - identical behavior to EN A; enables true 2-channel time-multiplexing. |
Key Features
| Feature | Design Value |
|---|---|
| Current Feedback Architecture | Enables stable wideband gain control using external resistors (RF/RG), eliminating capacitor-dependent compensation. |
| Independent Channel Shutdown | Zero supply current and high-Z output per channel allow dynamic MUX reconfiguration without loading active paths. |
| Broadcast-Grade Linearity | 0.016% differential gain and 0.075° differential phase preserve color accuracy in RGB and composite video systems. |
| Fast Enable/Disable Timing | 100ns turn-on and 40ns turn-off support glitch-free switching in spread-spectrum and portable video equipment. |
| Wide Supply Flexibility | Operates from ±2V to ±15V - accommodates legacy broadcast gear (±12V), industrial controllers (±5V), and low-power designs. |
Applications
| RGB Video MUX Driver | Composite Video Cable Driver |
|---|---|
|
Use Scenario: Switching between two RGB sources (e.g., PC and camera) before transmission over three 75Ω coaxial cables to a monitor. IC Role / Device Role / Timing Role: Dual-channel amplifier providing independent enable-controlled gain stages; each channel drives one color (R/G/B) with matched bandwidth and phase. Use Value: Enables sub-100ns channel switching with <1.2% gain error and no visible color shift - verified on Demo Board #039A. |
Use Scenario: Driving NTSC/PAL composite video signals over long coaxial runs (e.g., security camera to DVR). IC Role / Device Role / Timing Role: Single-channel current feedback amplifier configured for AV = 2, terminating into 75Ω load with back-termination. Use Value: Maintains 0.1dB gain flatness to 30MHz and preserves sync pulse integrity via 1600V/µs slew rate. |
| 2-Input Video Multiplexer | Portable Spread-Spectrum Amplifier |
|
Use Scenario: Selecting between two HDMI-derived analog video streams in a field-deployable AV switcher. IC Role / Device Role / Timing Role: Dual amplifier acting as active 2:1 MUX with EN A/EN B controlling source selection; outputs summed through 75Ω resistors. Use Value: Eliminates mechanical relay wear and contact bounce; supports hot-swapping with zero DC offset transient. |
Use Scenario: Low-power video amplification in battery-operated test equipment or handheld scopes. IC Role / Device Role / Timing Role: Amplifier operating on ±5V rails with shutdown between measurements to conserve energy. Use Value: Draws only 5mA per active channel and 0µA when idle - extends battery life without sacrificing 130MHz bandwidth. |
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 |
|---|---|---|---|
| LT1252CN8#PBF | Single-channel, no shutdown, 140MHz bandwidth, 1100V/µs slew rate, commercial temp range (0°C to 70°C). | Lacks independent enable and dual-channel integration; requires two units for MUX function. | Select when cost-sensitive single-channel video buffering is needed and industrial temperature range is not required. |
| LMH6720MA/NOPB | Dual-channel, no shutdown, 380MHz bandwidth, 1600V/µs slew rate, industrial temp range (–40°C to +85°C), different pinout. | Higher bandwidth but no enable logic; requires external MOSFET switches for MUX functionality. | Select when maximum small-signal bandwidth is prioritized over integrated power gating and cable-drive linearity. |
Compared with LT1259IN#PBF, LT1252CN8#PBF offers lower cost but sacrifices channel integration and industrial temperature rating, while LMH6720MA/NOPB delivers higher bandwidth at the expense of added external switching complexity and reduced differential phase accuracy (0.15° vs. 0.075°).
Availability
LT1259IN#PBF is available at Aetrix Electronics and suitable for RGB video MUX drivers, composite video cable drivers, and portable spread-spectrum amplifiers requiring stable component supply across industrial temperature ranges and long production lifecycles.
Supply support for LT1259IN#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, manufacturing, and documentation for legacy Linear parts including the LT1259 series.
The LT1259 product line was designed specifically for high-fidelity analog video signal conditioning - emphasizing low differential gain/phase error, fast switching, and robust cable-driving capability in broadcast, medical imaging, and industrial vision systems.
FAQ
What is the operating temperature range for LT1259IN#PBF?
The LT1259IN#PBF is an industrial-grade variant, specified and tested over –40°C to +85°C ambient temperature. This is confirmed in the Electrical Characteristics table under "Specified Temperature Range (Note 2)" and distinguishes it from commercial-grade LT1259CN/LT1259CS parts rated only from 0°C to 70°C. Thermal derating follows θJA = 70°C/W for the N-package DIP.
Does LT1259IN#PBF support single-supply operation?
Yes, LT1259IN#PBF supports true single-supply operation: V– can be tied to ground while V+ operates from +4V to +30V (i.e., ±2V to ±15V interpreted as 4V–30V total). Input common-mode range extends to within 2V of either rail, and output swing reaches ±3.7V into 150Ω on ±5V supplies - enabling use in +5V-only video line drivers with proper level-shifting.
How does the enable pin (EN) function on LT1259IN#PBF?
The EN pin on LT1259IN#PBF is internally pulled high; pulling it ≥2V below V+ disables the amplifier, reducing supply current to 0µA and placing the output in high-impedance state (4.4pF || 75kΩ). When enabled, EN draws ~60µA. The enable/disable transitions occur in 100ns and 40ns respectively - verified under ±5V supplies with 0.1V input step and 150Ω load.
Can LT1259IN#PBF drive 75Ω coaxial cable directly?
Yes, LT1259IN#PBF is explicitly characterized for 75Ω cable driving: typical application circuits show RF = RG = 1.6kΩ, RL = 150Ω (dual-terminated), delivering 30MHz square wave response with <5% overshoot. Output current capability of 60mA ensures stable 2VPP into 75Ω, and differential phase/gain specs (0.075°/0.016%) confirm broadcast compliance.
What is the difference between LT1259IN#PBF and LT1259IS#PBF?
LT1259IN#PBF uses a 14-pin PDIP (N) package with θJA = 70°C/W, while LT1259IS#PBF uses a 14-pin SOIC (S) package with θJA = 110°C/W. Both share identical electrical specifications and industrial –40°C to +85°C rating, but the SOIC version offers surface-mount compatibility and higher thermal resistance - requiring careful PCB copper area design for equivalent thermal performance.
LT1259IN#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- LT®
- Package/Case:
- 14-DIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- Current Feedback
- Number of Circuits:
- 2
- Output Type:
- -
- Slew Rate:
- 1600V/µs
- Gain Bandwidth Product:
- 130 MHz
- -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:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 14-PDIP
LT1259IN#PBF FAQ
1.How can I place an order for LT1259IN#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1259IN#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 LT1259IN#PBF reliable?
The price and inventory of LT1259IN#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1259IN#PBF is usually 5 days.
3.What payment methods are accepted for LT1259IN#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1259IN#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1259IN#PBF?
LT1259IN#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1259IN#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 LT1259IN#PBF?
For technical support, including LT1259IN#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1259IN#PBF requirements.
6.How does Aetrix verify that LT1259IN#PBF is sourced from the original manufacturer or authorized distributors?
All LT1259IN#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 LT1259IN#PBF meets industry standards.
7.What is the process for return or replacement of LT1259IN#PBF?
All LT1259IN#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1259IN#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 LT1259IN#PBF part is unused and in its original packaging.
Return procedure for LT1259IN#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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