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Analog Devices Inc. LT1194CJ8
- Part No.:
- LT1194CJ8
- Manufacturer:
- Analog Devices Inc.
- Category:
- Video Amps and Modules
- Package:
- 8-CDIP (0.300", 7.62mm)
- Datasheet:
-
LT1194CJ8.pdf
- Description:
- IC AMP DIFFERENTIAL 8CERDIP
- Quantity:
- Payment:
- Shipping:
Inventory:2,459
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Product details
Overview
LT1194CJ8 from Analog Devices (formerly Linear Technology) is a wideband video difference amplifier with fixed 20dB gain, ±50mA output drive, and adjustable input limiting for overdrive protection. It operates on ±5V supplies and delivers 35MHz –3dB bandwidth and 500V/µs slew rate to drive 75Ω coaxial cables directly in broadcast video routing and analog signal conditioning systems.
For engineers reviewing the LT1194CJ8 datasheet, LT1194CJ8 pinout, LT1194CJ8 application, or LT1194CJ8 equivalent, this page provides verified specifications, J8 CERDIP package details, differential gain/phase error values, settling time to 0.1%, and real-world cable-driving capability - all confirmed for the LT1194C temperature grade (0°C to 70°C) in the obsolete but still supported 8-lead ceramic DIP (J8) package.
Technical Context
The LT1194CJ8 implements a high-speed current-feedback architecture with uncommitted high-impedance (+) and (–) inputs, enabling both differential and single-ended configurations. Its input limiting function is controlled via BAL/VC pins (1 and 8), allowing DC voltage adjustment to reduce output amplitude during overdrive without sacrificing speed.
It features internal biasing optimized for ±5V operation, achieves 200ns settling to 0.1% on a 3V step, and maintains 45dB CMRR at 10MHz. The J8 package's hermetic ceramic construction ensures stable performance across industrial temperature cycling, though rated only for 0°C to 70°C per LT1194C specification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain | Fixed 20dB (×10) - eliminates external gain-setting resistors and ensures consistent video signal amplification. |
| –3dB Bandwidth | 35MHz - supports full NTSC/PAL baseband video bandwidth with margin for edge integrity. |
| Slew Rate | 500V/µs - enables clean reproduction of fast video transients and sync pulses without distortion. |
| Output Current | ±50mA - drives 75Ω coaxial cables directly without external buffers, reducing BOM count. |
| Settling Time | 200ns to 0.1% - meets timing-critical video switching and multiplexing requirements. |
| Differential Gain Error | 0.2% - preserves color fidelity in composite video applications per NTSC 3.58MHz standard. |
| Differential Phase Error | 0.08° - minimizes hue shift in broadcast-quality analog video signal paths. |
Pinout & Package
LT1194CJ8 is housed in an 8-lead hermetic CERDIP (J8) package, 0.300-inch narrow body, with tin-plate leads and glass-sealed ceramic construction. Designed for legacy industrial and military-grade systems requiring long-term reliability and moisture resistance, it shares footprint compatibility with N8 PDIP but offers superior thermal stability and hermeticity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 8 | BAL/VC (Balance/Voltage Control) | Adjustable input limiting control: tying pins together and raising above V– enables fast amplitude reduction during overdrive. |
| 2 | +IN | Non-inverting input with 30kΩ input resistance and 2pF capacitance - accepts differential or single-ended signals. |
| 3 | –IN | Inverting input, matched to +IN for optimal CMRR and differential gain accuracy. |
| 4 | V– | Negative supply pin (–5V); must be decoupled locally to maintain stability and noise immunity. |
| 5 | REF | Reference voltage input; tied to ground for single-ended operation or to mid-supply for level-shifting. |
| 6 | OUT | Class-AB output capable of ±50mA into 100Ω - drives terminated coax with minimal distortion. |
| 7 | V+ | Positive supply pin (+5V); requires local 0.1µF ceramic bypass for optimal settling performance. |
Key Features
| Feature | Design Value |
|---|---|
| Adjustable Input Limiting | DC voltage on BAL/VC pins reduces output swing before clipping - protects downstream stages without adding delay. |
| High Output Drive | ±50mA output current enables direct 75Ω cable driving - eliminates need for external line drivers in video distribution. |
| Low Differential Errors | 0.2% gain error and 0.08° phase error meet broadcast video fidelity requirements for NTSC/PAL systems. |
| Fast Settling | 200ns to 0.1% on 3V step - supports high-speed video switching, genlock, and multiplexer applications. |
| Supply Flexibility | Operates on ±5V or single 5V (with REF pin biasing) - simplifies power design in mixed-signal video equipment. |
Applications
| Video Line Receiver | Composite Video Amplifier |
|---|---|
Use Scenario: Receiving analog video signals from long coaxial runs in broadcast switchers or CCTV matrix systems. IC Role / Device Role / Timing Role: Difference amplifier rejecting common-mode noise induced on balanced or unbalanced cables. Use Value: 45dB CMRR at 10MHz suppresses hum and interference; ±50mA drive compensates for cable loss up to 100m. |
Use Scenario: Amplifying and distributing NTSC/PAL composite video in professional video routers and test equipment. IC Role / Device Role / Timing Role: Fixed-gain video buffer with precise differential gain/phase matching for color fidelity. Use Value: 0.2% differential gain and 0.08° phase error preserve chroma signal integrity across multiple distribution paths. |
| Video Multiplexer Output Driver | Sync Pulse Amplifier |
Use Scenario: Driving multiple video outputs from a single source in broadcast automation systems. IC Role / Device Role / Timing Role: High-current output stage delivering low-distortion video to parallel loads. Use Value: 35MHz bandwidth and 500V/µs slew rate ensure sharp rise/fall times on composite sync edges and active video transitions. |
Use Scenario: Amplifying horizontal/vertical sync pulses in analog video timing generators and waveform monitors. IC Role / Device Role / Timing Role: Fast-settling gain block preserving pulse shape and timing accuracy. Use Value: 200ns settling to 0.1% guarantees sub-line jitter in sync distribution, critical for frame-accurate switching. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar video difference amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT1194CS8 | Same electrical specs, SO-8 plastic package; θJA = 150°C/W vs J8's 100°C/W; no hermetic seal. | Preferred for cost-sensitive, high-volume PCB assembly; unsuitable for high-humidity or extended-life military use. | Select when RoHS compliance, reflow compatibility, and board space are priorities over hermetic reliability. |
| LT1194CN8 | Same electrical specs, PDIP-8 plastic package; θJA = 100°C/W; lead-free finish available; wider temp range not rated. | Drop-in replacement for through-hole prototyping or legacy repair; matches J8 footprint but lacks hermeticity. | Choose for quick evaluation or field repair where J8 sockets are unavailable but identical pinout and gain are required. |
Compared with LT1194CJ8, LT1194CS8 trades hermetic reliability for surface-mount manufacturability and lower thermal resistance in convection-cooled environments, while LT1194CN8 retains through-hole compatibility but sacrifices moisture resistance - making the J8 variant uniquely suited for sealed enclosures and long-lifecycle video infrastructure.
Availability
LT1194CJ8 is available at Aetrix Electronics and suitable for broadcast video routing, analog test equipment, and legacy military avionics requiring stable component supply with traceable lot history and extended lifecycle support.
Supply support for LT1194CJ8 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 technical support, datasheet archives, and legacy product continuity for the LT portfolio.
The LT1194 series was designed specifically for high-fidelity analog video signal processing - emphasizing differential gain/phase accuracy, cable-driving capability, and robust overdrive handling in broadcast, medical imaging, and industrial vision systems.
FAQ
What is the operating temperature range for LT1194CJ8?
The LT1194CJ8 is specified for the LT1194C grade: 0°C to 70°C ambient operating temperature. This is explicitly defined in the Absolute Maximum Ratings table and confirmed across all electrical characteristics sections labeled "LT1194C". The J8 package's hermetic construction supports reliable operation within this range, though it is not rated for extended industrial or military temperature extremes.
Does LT1194CJ8 support single 5V supply operation?
Yes, LT1194CJ8 supports single 5V operation when the REF pin (Pin 5) is biased to 2.5V and input common-mode voltage is centered accordingly. The datasheet confirms this configuration in the "ELECTRICAL CHARACTERISTICS" tables under VS+ = 5V, VS– = 0V conditions, and shows output swing of 3.6V to 0.25V into 100Ω - validating rail-to-rail usable range in single-supply mode.
How does the input limiting function work on LT1194CJ8?
The LT1194CJ8 input limiting is controlled by the BAL/VC pins (1 and 8). When these pins are tied together and raised ≥0.3V above V–, the input differential pair begins limiting, reducing output amplitude before hard clipping occurs. This is a fast, analog front-end limiting technique - not digital clamping - preserving signal integrity while protecting downstream circuitry from overdrive.
What is the maximum capacitive load LT1194CJ8 can drive stably?
LT1194CJ8 can drive up to 50pF capacitive load directly, as verified in Typical Performance Characteristics (TPC12 and TPC13). For larger loads (e.g., scope probes or unterminated cables), the datasheet recommends isolating the capacitance with a 10Ω series resistor at the output to maintain stability and prevent peaking or ringing - a proven method shown in TA12 and TA13.
Is LT1194CJ8 pin-compatible with other LT1194 package variants?
Yes, LT1194CJ8 is pin-compatible with LT1194CN8 (PDIP) and LT1194CS8 (SO-8): all share identical 8-pin numbering, pin functions, and electrical behavior. The J8, N8, and S8 packages differ only in mechanical construction and thermal characteristics - not pinout or logic - enabling direct substitution in existing layouts where package constraints allow.
LT1194CJ8 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Package/Case:
- 8-CDIP (0.300", 7.62mm)
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Obsolete
- Applications:
- Differential
- Output Type:
- -
- Number of Circuits:
- 1
- -3db Bandwidth:
- 35 MHz
- Slew Rate:
- 500V/µs
- Current - Supply:
- 35 mA
- Current - Output / Channel:
- 50 mA
- Voltage - Supply, Single/Dual (±):
- 4.75V ~ 16V, ±2.38V ~ 8V
- Mounting Type:
- Through Hole
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- 8-CERDIP
LT1194CJ8 FAQ
1.How can I place an order for LT1194CJ8 through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1194CJ8 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 LT1194CJ8 reliable?
The price and inventory of LT1194CJ8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1194CJ8 is usually 5 days.
3.What payment methods are accepted for LT1194CJ8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1194CJ8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1194CJ8?
LT1194CJ8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1194CJ8 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 LT1194CJ8?
For technical support, including LT1194CJ8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1194CJ8 requirements.
6.How does Aetrix verify that LT1194CJ8 is sourced from the original manufacturer or authorized distributors?
All LT1194CJ8 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 LT1194CJ8 meets industry standards.
7.What is the process for return or replacement of LT1194CJ8?
All LT1194CJ8 units undergo pre-shipment inspection (PSI). If there is an issue with LT1194CJ8, 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 LT1194CJ8 part is unused and in its original packaging.
Return procedure for LT1194CJ8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LT1194CJ8 Tags
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