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Analog Devices Inc. LT1497CS#TRPBF
- Part No.:
- LT1497CS#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LT1497CS#TRPBF.pdf
- Description:
- IC OPAMP CFA 2 CIRCUIT 16SO
- Quantity:
- Payment:
- Shipping:
Inventory:2,638
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Product details
Overview
LT1497CS#TRPBF 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 signal conditioning. It delivers ±125mA output current per channel, 50MHz bandwidth at ±15V supply, 900V/µs slew rate, and maintains 0.02% differential gain at AV = 2 into 150Ω - enabling HDSL2 single-pair line driver implementations with –70dBc 2nd/3rd harmonic distortion up to 1MHz.
For engineers reviewing the LT1497CS#TRPBF datasheet, LT1497CS#TRPBF pinout, LT1497CS#TRPBF application, or LT1497CS#TRPBF equivalent, key selection criteria include guaranteed ±125mA drive capability across ±2.5V to ±15V supplies, thermal shutdown protection, SO-16 package with enhanced θJA = 40°C/W, and verified performance in cable driver and video buffer roles requiring low distortion and fast settling (55ns to 0.1%).
Technical Context
The LT1497CS#TRPBF employs complementary bipolar current feedback architecture with separate high-current input and output stages. Its bandwidth remains stable across gains via external feedback resistor tuning (e.g., 560Ω for 50MHz at ±15V), unlike voltage-feedback op-amps. Input stage clamping enables enhanced slew rate in unity-gain noninverting configurations but introduces controlled overshoot.
Thermal shutdown activates at TJ ≥ 150°C, with junction temperature calculated as TJ = PD × θJA + TA. The SO-16 package achieves θJA = 40°C/W on a 2500mm² 2oz copper board - critical for sustaining ±100mA continuous output at ±15V without derating. Channel separation exceeds 100dB, supporting dual-channel integrity in differential signaling paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Bandwidth | 50MHz at ±15V supply, RF = RG = 560Ω, RL = 100Ω - supports baseband video and HDSL2 signaling without gain-dependent roll-off. |
| Slew Rate | 900V/µs at ±15V - enables clean 10V step response with 55ns settling to 0.1%, critical for pulse fidelity in test equipment amplifiers. |
| Output Current | ±125mA per amplifier into 1Ω load - drives 100Ω twisted pairs differentially with –70dBc distortion at ±40mA peak signals. |
| Differential Gain/Phase | 0.02% / 0.015° at AV = 2, RL = 150Ω, ±15V - meets NTSC composite video linearity requirements without external calibration. |
| Supply Range | ±2.5V to ±15V - operates from low-voltage portable systems (±2.5V) to industrial line drivers (±15V) with consistent 7–9mA per amp supply current. |
| Thermal Resistance | θJA = 40°C/W (SO-16, 2500mm² 2oz Cu) - allows sustained 1.24W dissipation at 85°C ambient without thermal cycling. |
| Settling Time | 55ns to 0.1% for 10V step - ensures accurate waveform reconstruction in high-speed data acquisition front-ends. |
Pinout & Package
The LT1497CS#TRPBF is housed in a 16-lead plastic SO (narrow 0.150") package with exposed V– pins for thermal enhancement. Pin 1 is OUT A; pins 2–4 are –IN A, +IN A, V–; pins 5–8 are NC, V–, NC, V–; pins 9–12 are V–, NC, V+, OUT B; pins 13–16 are –IN B, +IN B, NC, V–. All V– pins are internally connected and must be tied to the negative supply rail.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT A) | Inverting amplifier output A | Drives loads up to ±125mA; requires external feedback to –IN A for stability. |
| 2 (–IN A) | Inverting input A | Current-summing node; stray capacitance here causes peaking - minimize trace length and guard ring. |
| 3 (+IN A) | Noninverting input A | High-impedance bias point (1.5–10MΩ); offset drift ≤10µV/°C limits DC-coupled precision use. |
| 4, 6, 8, 9, 16 (V–) | Negative supply rail | Five dedicated V– pins reduce thermal resistance and power path inductance - essential for ±100mA transient delivery. |
| 11 (V+) | Positive supply rail | Single V+ pin handles combined quiescent + dynamic current; decouple locally with ≥1µF ceramic. |
| 12 (OUT B) | Inverting amplifier output B | Independent channel; channel separation >100dB prevents crosstalk in dual-line driver configurations. |
| 13 (–IN B) | Inverting input B | Electrically isolated from –IN A; enables true differential pair driving without shared feedback network. |
| 14 (+IN B) | Noninverting input B | Matches +IN A characteristics - supports matched gain/phase in stereo or I/Q signal paths. |
Key Features
| Feature | Design Value |
|---|---|
| Dual current feedback topology | Maintains 50MHz bandwidth across gains of –1 to 10 via feedback resistor selection (e.g., 560Ω to 270Ω), eliminating gain-bandwidth trade-off. |
| Enhanced thermal SO-16 package | θJA = 40°C/W enables ±100mA continuous output at 85°C ambient without heatsink - 2× improvement over standard SO-16. |
| Integrated thermal shutdown | Protects against sustained overload; cycles at ~10ms–seconds interval when TJ > 150°C - prevents latch-up without external circuitry. |
| Low-distortion video performance | 0.02% differential gain and 0.015° phase error at 150Ω load meet broadcast-grade NTSC requirements without post-compensation. |
| Wide supply compatibility | Operates from ±2.5V (portable) to ±15V (industrial) with <10% bandwidth reduction - simplifies multi-rail system integration. |
Applications
| HDSL2 Single-Pair Line Driver | NTSC Composite Video Amplifier |
|---|---|
Use Scenario: Transmitting full-duplex digital subscriber line signals over unshielded twisted pair in DSLAM and CPE equipment. IC Role / Device Role / Timing Role: Dual-channel current feedback amplifier configured as differential line driver with 560Ω feedback and 100Ω termination. Use Value: Achieves –70dBc 2nd/3rd harmonic distortion at 1MHz and ±40mA peak output - meets ITU-T G.991.2 spectral mask without filtering. | Use Scenario: Buffering and driving NTSC composite video signals from encoder ASICs to 75Ω coaxial cables in broadcast monitors and set-top boxes. IC Role / Device Role / Timing Role: Unity-gain video buffer with 150Ω load termination and 510Ω feedback resistors. Use Value: Delivers 0.02% differential gain and 0.015° phase error - preserves color fidelity and sync timing across 4.43MHz chroma subcarrier. |
| High-Speed Test Equipment Amplifier | Twisted-Pair Cable Driver |
Use Scenario: Output stage of automated test equipment (ATE) sourcing calibrated analog waveforms to DUTs with variable impedance. IC Role / Device Role / Timing Role: Precision gain-of-10 amplifier driving 50Ω loads with 1.8kΩ/200Ω feedback network. Use Value: 55ns 0.1% settling time on 10V steps ensures accurate pulse amplitude measurement at >10MS/s sampling rates. | Use Scenario: Driving long unshielded twisted-pair cables (e.g., RS-485, CAN FD physical layer) in industrial automation networks. IC Role / Device Role / Timing Role: Differential driver with split outputs (OUT A/OUT B) and common-mode bias control via +IN A/+IN B. Use Value: ±125mA drive capability sustains >2Vpp differential swing over 100m CAT5 cable with <1% amplitude droop at 10MHz. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current feedback amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT1207CN#PBF | Higher ±250mA output, 60MHz bandwidth, 40mA supply current vs. LT1497CS#TRPBF's ±125mA/50MHz/7mA - requires larger thermal solution. | Targeted at higher-power line drivers where LT1497CS#TRPBF hits thermal limits; not drop-in due to different pinout and no thermal shutdown. | Select LT1207CN#PBF only when >±200mA drive is required and board layout accommodates higher power dissipation. |
| LT1364CS8#TRPBF | Lower ±50mA output, 70MHz bandwidth, 4.5mA supply current, SO-8 package - lacks V– pin multiplicity and thermal robustness of LT1497CS#TRPBF. | Better suited for low-power, space-constrained video buffers where 50mA suffices; cannot replace LT1497CS#TRPBF in HDSL2 drivers. | Choose LT1364CS8#TRPBF for cost-sensitive, low-distortion video applications below 50mA load current. |
Compared with LT1207CN#PBF and LT1364CS8#TRPBF, the LT1497CS#TRPBF uniquely balances ±125mA drive, 50MHz bandwidth, and 7mA efficiency in a thermally optimized SO-16 package with integrated shutdown - making it the optimal choice for mid-power HDSL2 and broadcast video drivers where thermal margin and reliability are critical.
Availability
LT1497CS#TRPBF is available at Aetrix Electronics and suitable for HDSL2 line drivers, NTSC video amplifiers, high-speed test equipment, and twisted-pair cable drivers requiring stable component supply, long-term industrial lifecycle support, and guaranteed thermal performance.
Supply support for LT1497CS#TRPBF 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, inheriting its high-performance analog portfolio. Linear Technology specialized in precision, high-speed, and power-efficient ICs for demanding signal chain applications.
The LT1497CS#TRPBF belongs to Linear Technology's current feedback amplifier product line, designed specifically for high-output-drive, low-distortion applications in telecommunications infrastructure, broadcast video, and automated test equipment where traditional op-amps fail to meet speed/power trade-offs.
FAQ
What is the maximum continuous output current specification for the LT1497CS#TRPBF?
The LT1497CS#TRPBF is specified for ±125mA maximum output current per amplifier into a 1Ω load at ±15V supply, with thermal shutdown engaging if junction temperature exceeds 150°C. At ±5V operation, it delivers ±100mA continuously into 100Ω loads while maintaining <0.1% THD up to 1MHz - verified in the HDSL2 line driver reference design (TA01).
Does the LT1497CS#TRPBF support single-supply operation?
Yes, the LT1497CS#TRPBF operates from single supplies as low as +4V (±2V equivalent) up to +30V (±15V equivalent). For single-supply use, bias the +IN pins at mid-rail using precision resistors or reference, and ensure the input common-mode range (±0.5V to ±14V depending on supply) accommodates signal swing - confirmed in Electrical Characteristics Table under "Input Voltage Range".
How does the LT1497CS#TRPBF's thermal shutdown behave under sustained overload?
Under sustained overload causing TJ ≥ 150°C, the LT1497CS#TRPBF enters thermal cycling mode - alternating between normal operation and shutdown at intervals of 10ms to several seconds. This protects the die without damage and is observable as periodic output dropout; recovery occurs once TJ drops below ~140°C, as documented in the Thermal Considerations section.
What feedback resistor value achieves 50MHz bandwidth for the LT1497CS#TRPBF at ±15V supply?
A 560Ω feedback resistor (RF) with matched 560Ω gain-setting resistor (RG) achieves 50MHz small-signal bandwidth at ±15V supply into 100Ω load with ≤1dB peaking, as specified in the Small-Signal Bandwidth table and validated in Figure G05. Lower values (e.g., 270Ω) increase bandwidth but risk instability with capacitive loads.
Is the LT1497CS#TRPBF pin-compatible with other Linear Technology dual current feedback amplifiers?
No, the LT1497CS#TRPBF uses a unique 16-pin SO package with five dedicated V– pins and internal NC placements, differing from LT1207's 16-pin SO (different pin mapping) and LT1364's 8-pin SO. Direct replacement requires PCB redesign; however, functional equivalents exist with adjusted feedback networks and thermal layout.
LT1497CS#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- LT®
- Package/Case:
- 16-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:
- 16-SO
LT1497CS#TRPBF FAQ
1.How can I place an order for LT1497CS#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1497CS#TRPBF 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 LT1497CS#TRPBF reliable?
The price and inventory of LT1497CS#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1497CS#TRPBF is usually 5 days.
3.What payment methods are accepted for LT1497CS#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1497CS#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1497CS#TRPBF?
LT1497CS#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1497CS#TRPBF 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 LT1497CS#TRPBF?
For technical support, including LT1497CS#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1497CS#TRPBF requirements.
6.How does Aetrix verify that LT1497CS#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT1497CS#TRPBF 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 LT1497CS#TRPBF meets industry standards.
7.What is the process for return or replacement of LT1497CS#TRPBF?
All LT1497CS#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1497CS#TRPBF, 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 LT1497CS#TRPBF part is unused and in its original packaging.
Return procedure for LT1497CS#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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