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Analog Devices Inc. LT1497CS8#TR
- Part No.:
- LT1497CS8#TR
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LT1497CS8#TR.pdf
- Description:
- IC OPAMP CFA 2 CIRCUIT 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:2,226
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Product details
Overview
LT1497CS8#TR from Analog Devices (formerly Linear Technology) is a dual current feedback amplifier optimized for high-speed, high-output-drive applications including twisted-pair line drivers and video amplification. It delivers ±125mA output current per channel, 50MHz bandwidth at ±15V supply, 900V/µs slew rate, and ±3.1V output swing into 100mA load at ±5V - enabling robust HDSL2 single-pair driver implementations.
For engineers reviewing the LT1497CS8#TR datasheet, LT1497CS8#TR pinout, LT1497CS8#TR application, or LT1497CS8#TR equivalent, key selection criteria include its SO-8 package with enhanced thermal resistance (θJA = 80°C/W), ±5V operation capability, low 7mA per-amplifier supply current, and distortion performance of –70dBc at 1MHz for ±40mA peak signals in differential twisted-pair configurations.
Technical Context
The LT1497CS8#TR uses complementary bipolar current feedback architecture, where bandwidth remains stable across gain settings via external feedback resistor selection (e.g., 560Ω for AV = –1). Its input stage includes clamping diodes to enhance large-signal slew behavior, while output stage thermal shutdown protects against fault conditions.
It operates from ±2.5V to ±5V supplies (SO-8 variant), supports differential input/output configurations, and maintains 0.02% differential gain and 0.015° differential phase at AV = 2 with 150Ω load - meeting stringent NTSC video linearity requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Bandwidth | 50MHz at ±15V; 35MHz at ±5V - enables wideband signal conditioning up to VHF range in cable and video systems. |
| Slew Rate | 900V/µs at ±15V; 350V/µs at ±5V - supports fast transient response for pulse and composite video signals. |
| Output Current | ±125mA per amplifier - sufficient to drive 100Ω twisted pairs or 50Ω coaxial cables directly without external buffers. |
| Supply Range | ±2.5V to ±5V - compatible with low-voltage industrial and telecom power rails, reducing system power overhead. |
| Differential Gain / Phase | 0.02% / 0.015° at AV = 2, RL = 150Ω - preserves color fidelity in analog video distribution and broadcast equipment. |
| Settling Time | 50ns to 0.1% for 5V step at ±5V - meets timing-critical requirements in high-speed test instrumentation and data acquisition front-ends. |
| Input Offset Voltage | ±10mV max - ensures DC accuracy in precision gain stages and active filter topologies. |
Pinout & Package
LT1497CS8#TR is housed in an 8-lead plastic SO (narrow, 0.150") package with exposed pad thermal enhancement. Pinout follows standard dual CFA configuration with independent input and output terminals per channel and shared dual supplies.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT A) | Amplifier A output | High-current, low-impedance output node capable of ±125mA sourcing/sinking; requires minimal external compensation for stability. |
| 2 (–IN A) | Inverting input A | Current-summing node for feedback network; sensitive to stray capacitance - layout must minimize trace length and guard against coupling. |
| 3 (+IN A) | Noninverting input A | High-impedance voltage reference point; bias current ±3µA max - suitable for high-Z sensor interfaces or passive filters. |
| 4 (V–) | Negative supply rail | Common return for both amplifiers; connects to ground or negative rail; multiple V– pins improve PSRR and thermal dissipation. |
| 5 (V+) | Positive supply rail | Primary power input for both channels; decoupling capacitor (≥0.1µF) required within 5mm for high-frequency stability. |
| 6 (OUT B) | Amplifier B output | Independent high-drive output; usable in parallel with OUT A for 250mA total drive or as separate signal path in dual-channel systems. |
| 7 (–IN B) | Inverting input B | Second current-summing node; identical electrical behavior to Pin 2 - enables matched dual-path designs like differential line drivers. |
| 8 (+IN B) | Noninverting input B | Second high-Z input; supports independent gain setting or common-mode rejection in instrumentation topologies. |
Key Features
| Feature | Design Value |
|---|---|
| Enhanced θJA SO-8 package | 80°C/W thermal resistance at ±5V operation - enables reliable 7mA-per-amp continuous operation on standard 2oz copper PCBs without heatsinks. |
| Thermal shutdown protection | Activates above 150°C junction temperature - prevents latch-up or permanent damage during output short-circuit or overload events. |
| Low distortion at high frequency | –70dBc 2nd/3rd harmonic distortion at 1MHz for ±40mA signals - critical for HDSL2 compliance and clean RF signal generation. |
| Wide supply range compatibility | Operates from ±2.5V to ±5V - simplifies integration into mixed-voltage systems and reduces need for dedicated ±15V rails. |
| Channel separation | 115dB at ±5V, 50Ω load - minimizes crosstalk between dual channels in time-interleaved ADC drivers or stereo video paths. |
Applications
| HDSL2 Single-Pair Line Driver | NTSC Composite Video Amplifier |
|---|---|
Use Scenario: Driving twisted-pair telephone lines for high-speed digital subscriber line (HDSL2) transmission over distances up to 4km. IC Role / Device Role / Timing Role: Dual-channel current feedback amplifier configured differentially to deliver ±40mA peak signals with <–70dBc distortion up to 1MHz. Use Value: Eliminates need for discrete output transistors or transformer coupling, reducing BOM count and board area while maintaining EMI-compliant spectral purity. | Use Scenario: Buffering and driving 75Ω coaxial video distribution networks in broadcast monitoring and CCTV systems. IC Role / Device Role / Timing Role: Unity-gain video buffer with 0.02% differential gain and 0.015° differential phase error at 4.43MHz color subcarrier frequency. Use Value: Preserves chrominance/luminance timing alignment and color saturation across long cable runs without requiring post-amplifier correction circuitry. |
| Dual-Channel Test Equipment Amplifier | High-Speed Active Filter Driver |
Use Scenario: Output stage for automated test equipment generating calibrated 10Vpp, 10MHz square waves with <1% overshoot. IC Role / Device Role / Timing Role: Dual amplifier delivering 55ns 0.1% settling time for 10V steps at ±5V supply, supporting multi-channel waveform generation. Use Value: Enables simultaneous stimulus/response measurement in ATE systems without inter-channel skew or amplitude mismatch. | Use Scenario: Driving low-impedance loads (e.g., 50Ω) from high-Q active filter outputs in communications baseband processing. IC Role / Device Role / Timing Role: Low-noise (3nV/√Hz), high-output-current buffer isolating filter transfer function from load-induced peaking or phase shift. Use Value: Maintains designed filter roll-off and group delay characteristics even when connected to reactive or capacitive test fixtures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current feedback amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT1207CS8#TR | Higher output drive (±250mA), same SO-8 package, but 40mA supply current vs. 14mA for LT1497CS8#TR. | Preferred for >200mA load requirements; less suitable for low-power battery-operated or thermally constrained designs. | Select LT1207CS8#TR only when full 250mA per channel is required and thermal budget allows higher dissipation. |
| LT1364CS8#TR | 70MHz bandwidth, 1000V/µs slew rate, 50mA output current, C-Load™ stable with 10nF capacitive loads. | Better suited for unity-gain stable capacitive-load buffering; lacks LT1497CS8#TR's high-current drive and low-distortion video performance. | Choose LT1364CS8#TR for general-purpose high-speed buffering where load capacitance exceeds 100pF and output current ≤50mA suffices. |
Compared with LT1207CS8#TR and LT1364CS8#TR, the LT1497CS8#TR uniquely balances ±125mA drive, 35–50MHz bandwidth at ±5V, and <0.02% video distortion - making it optimal for space-constrained, low-voltage, high-fidelity line driver applications where thermal efficiency and signal integrity are jointly critical.
Availability
LT1497CS8#TR is available at Aetrix Electronics and suitable for HDSL2 line drivers, NTSC video distribution systems, dual-channel ATE output stages, and high-speed active filter interfaces requiring stable component supply and guaranteed long-term availability.
Supply support for LT1497CS8#TR 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 continues to manufacture and support its precision analog portfolio, including high-performance amplifiers and data converters.
The LT1497CS8#TR belongs to Linear Technology's current feedback amplifier product line, engineered specifically for high-output-drive, wideband signal conditioning in telecom infrastructure, video systems, and test equipment where speed, linearity, and thermal efficiency are co-primary design constraints.
FAQ
What is the maximum output current specification for LT1497CS8#TR?
The LT1497CS8#TR delivers ±125mA maximum output current per amplifier into a 1Ω load at ±5V supply, verified under pulse-tested conditions per the official datasheet. This rating holds across the full operating temperature range (–40°C to 85°C) and enables direct driving of 50Ω or 75Ω transmission lines without external boost stages.
Does LT1497CS8#TR support single-supply operation?
No - the LT1497CS8#TR is specified only for split-supply operation from ±2.5V to ±5V. Its input common-mode range extends to within 1.5V of either rail, and output swing reaches ±3.1V into 100mA load at ±5V. Single-supply use would violate absolute maximum ratings and invalidate all AC/DC specifications.
What is the small-signal bandwidth of LT1497CS8#TR at ±5V supply?
At ±5V supply with RF = RG = 560Ω and RL = 100Ω, the LT1497CS8#TR achieves 35MHz small-signal bandwidth (–3dB point, ≤1dB peaking). Bandwidth scales with supply voltage: it drops to 30MHz at ±2.5V and rises to 50MHz at ±15V in the CS variant.
How does thermal shutdown function in LT1497CS8#TR?
The LT1497CS8#TR incorporates internal thermal shutdown that activates when junction temperature exceeds 150°C. Upon triggering, the device cycles between operational and off states at ~10ms–several second intervals - protecting against permanent damage during sustained overload or inadequate PCB heat sinking while allowing automatic recovery once cooled.
Can LT1497CS8#TR drive capacitive loads directly?
Yes - the LT1497CS8#TR can drive capacitive loads up to ~10,000pF when using appropriate feedback resistors (e.g., ≥270Ω for AV = 10), as validated by the "Maximum Capacitive Load vs Feedback Resistor" curve in the datasheet. For loads exceeding this limit or requiring tighter phase margin, a 10–20Ω series isolation resistor at the output is recommended.
LT1497CS8#TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- LT®
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Current Feedback
- Number of Circuits:
- 2
- Output Type:
- -
- Slew Rate:
- 900V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 50 MHz
- Current - Input Bias:
- 7 µA
- Voltage - Input Offset:
- 3 mV
- Current - Supply:
- 7mA (x2 Channels)
- Current - Output / Channel:
- 220 mA
- Voltage - Supply Span (Min):
- 5 V
- Voltage - Supply Span (Max):
- 30 V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO
LT1497CS8#TR FAQ
1.How can I place an order for LT1497CS8#TR through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1497CS8#TR 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 LT1497CS8#TR reliable?
The price and inventory of LT1497CS8#TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1497CS8#TR is usually 5 days.
3.What payment methods are accepted for LT1497CS8#TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1497CS8#TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1497CS8#TR?
LT1497CS8#TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1497CS8#TR 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 LT1497CS8#TR?
For technical support, including LT1497CS8#TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1497CS8#TR requirements.
6.How does Aetrix verify that LT1497CS8#TR is sourced from the original manufacturer or authorized distributors?
All LT1497CS8#TR 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 LT1497CS8#TR meets industry standards.
7.What is the process for return or replacement of LT1497CS8#TR?
All LT1497CS8#TR units undergo pre-shipment inspection (PSI). If there is an issue with LT1497CS8#TR, 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 LT1497CS8#TR part is unused and in its original packaging.
Return procedure for LT1497CS8#TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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