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Analog Devices Inc. LT1497CS#PBF
- Part No.:
- LT1497CS#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LT1497CS#PBF.pdf
- Description:
- IC OPAMP CFA 2 CIRCUIT 16SO
- Quantity:
- Payment:
- Shipping:
Inventory:448
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Product details
Overview
LT1497CS#PBF from Analog Devices (formerly Linear Technology) is a dual current feedback amplifier optimized for high-speed, high-output-drive video and line-driver applications. It delivers ±125mA output current per channel, 50MHz bandwidth at ±15V supplies, 900V/µs slew rate, and ±13V output swing into 100mA loads - enabling robust twisted-pair and coaxial cable driving in HDSL2 and broadcast video systems.
For engineers reviewing the LT1497CS#PBF datasheet, LT1497CS#PBF pinout, LT1497CS#PBF application, or LT1497CS#PBF equivalent, key selection criteria include its SO-16 package thermal resistance (θJA = 40°C/W), ±2.5V to ±15V supply flexibility, differential gain (0.02%) and phase (0.015°) performance at 150Ω, and guaranteed thermal shutdown protection under fault conditions.
Technical Context
The LT1497CS#PBF uses complementary bipolar current feedback architecture with separate input and output stages, enabling bandwidth stability across gain configurations via feedback resistor tuning (e.g., 560Ω for AV = –1). Its transresistance gain (ROL ≥ 100kΩ) and low input bias current mismatch (±1µA typ.) support precision closed-loop control in high-frequency signal paths.
Thermal design is integral: the SO-16 package features enhanced heat dissipation (θJA = 40°C/W on 2500mm² 2oz copper), and internal thermal shutdown activates at 150°C junction temperature - cycling operation without damage during sustained overload or poor PCB heatsinking.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Bandwidth | 50MHz at ±15V supply, RF = RG = 560Ω, RL = 100Ω - enables full HD video and 1–2MHz HDSL2 line driving without gain peaking. |
| Slew Rate | 900V/µs at ±15V - supports fast transient response for 10V step settling in 55ns (0.1%), critical for pulse-amplifier and test-equipment designs. |
| Output Current | ±125mA per amplifier, RL = 1Ω - drives 50Ω/75Ω cables directly and sustains ±12.65V swing into 100mA loads at ±15V. |
| Supply Range | ±2.5V to ±15V - allows operation from low-voltage portable systems (±2.5V) to industrial line drivers (±15V) without redesign. |
| Differential Gain/Phase | 0.02% / 0.015° at AV = 2, RL = 150Ω, ±15V - meets NTSC composite video fidelity requirements without external correction. |
| Input Offset Voltage | ±3mV max (25°C), ±10mV over full temp range - ensures DC accuracy in buffered sensor interfaces and precision gain blocks. |
| Channel Separation | 100dB min at ±15V - prevents crosstalk between dual channels in stereo audio, dual ADC buffering, or differential signaling paths. |
Pinout & Package
LT1497CS#PBF 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–. V– is connected to 4 pins (2, 6, 10, 16) to reduce thermal resistance and improve power dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT A) | Inverting amplifier output A | Drives load directly; capable of ±125mA sink/source; requires external feedback to –IN A. |
| 2 (–IN A) | Inverting input A | Current-summing node; must be connected to feedback resistor; sensitive to stray capacitance. |
| 3 (+IN A) | Noninverting input A | High-impedance voltage reference point; bias current ≤ ±3µA (25°C); used for unity-gain buffer configuration. |
| 4 (V–) | Negative supply rail A | Shared negative rail for both amplifiers; four dedicated pins (2, 6, 10, 16) lower thermal resistance to 40°C/W. |
| 9 (V–) | Negative supply rail B (shared) | Electrically tied to pin 4; provides low-inductance return path for both channels' quiescent and output currents. |
| 12 (OUT B) | Inverting amplifier output B | Independent output channel; identical specs to OUT A; enables dual-path signal conditioning or paralleled drive. |
| 13 (–IN B) | Inverting input B | Separate current-summing node; no electrical coupling to –IN A; supports independent gain/feedback networks. |
| 14 (+IN B) | Noninverting input B | Independent high-Z input; offset voltage matching ≤ ±1mV vs +IN A enables precise dual-channel tracking. |
| 15 (V+) | Positive supply rail | Single positive rail for both amplifiers; decoupling recommended within 1cm of pin using 0.1µF ceramic + 10µF tantalum. |
Key Features
| Feature | Design Value |
|---|---|
| Enhanced thermal SO-16 package | θJA = 40°C/W (vs. 80°C/W for SO-8 variant), enabling ±15V operation without derating in compact layouts. |
| Thermal shutdown protection | Automatic cycling at TJ ≥ 150°C prevents permanent damage during output short-circuit or excessive ambient conditions. |
| Low distortion at high frequency | –70dBc 2nd/3rd harmonic distortion at 1MHz for ±40mA signals - meets HDSL2 spectral mask requirements. |
| Wide supply compatibility | Operates from ±2.5V to ±15V with monotonic parameter shifts - eliminates need for multiple BOM variants across voltage domains. |
| Guaranteed output drive | ±125mA minimum per channel into 1Ω - supports direct driving of 50Ω/75Ω transmission lines without external boost transistors. |
Applications
| HDSL2 Single-Pair Line Driver | Broadcast Video Amplifier |
|---|---|
Use Scenario: Transmitting full-duplex digital subscriber line data over single twisted-pair telephone wiring at 1.5Mbps. IC Role / Device Role / Timing Role: Dual-channel current feedback amplifier configured as differential line driver with 560Ω feedback network. Use Value: Delivers –70dBc harmonic distortion up to 1MHz while sourcing ±40mA peak, ensuring compliance with ANSI T1.413 spectral masks. | Use Scenario: Buffering and distributing composite NTSC video signals in studio switchers and distribution amplifiers. IC Role / Device Role / Timing Role: Unity-gain video buffer with 150Ω back-terminated output driving 75Ω coaxial cable runs. Use Value: Achieves 0.02% differential gain and 0.015° differential phase error - preserves color fidelity and sync timing across multi-display setups. |
| Cable Test Equipment Driver | Dual-Channel ADC Input Buffer |
Use Scenario: Generating calibrated high-slew-rate stimulus waveforms for time-domain reflectometry (TDR) and impedance testing of coaxial cables. IC Role / Device Role / Timing Role: Fast-settling (55ns to 0.1%) voltage amplifier driving 50Ω measurement fixtures. Use Value: 900V/µs slew rate and 50MHz bandwidth enable clean 10V-step generation with <1% overshoot - critical for sub-nanosecond edge fidelity. | Use Scenario: Driving multiplexed inputs of dual 12-bit SAR ADCs in high-channel-count data acquisition systems. IC Role / Device Role / Timing Role: Low-offset, low-noise dual buffer isolating ADC inputs from multiplexer switching transients. Use Value: ±3mV max input offset and 3nV/√Hz input noise ensure <0.5LSB error contribution at 12-bit resolution with 150Ω source impedance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current feedback amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT1207CS#PBF | Higher output drive (±250mA), same 60MHz bandwidth, but 40mA supply current vs. LT1497CS#PBF's 7mA per amp. | Preferred for >±200mA load demands; less suitable for low-power portable or thermally constrained designs. | Select LT1207CS#PBF only when absolute maximum output current exceeds ±125mA and thermal budget allows higher quiescent dissipation. |
| LT1364CS#PBF | 70MHz bandwidth, 1000V/µs slew rate, but limited to ±50mA output and C-Load™ stability with capacitive loads. | Better for high-bandwidth, low-current precision buffering (e.g., photodiode transimpedance); not rated for cable driving. | Choose LT1364CS#PBF for applications prioritizing speed/noise over drive strength - e.g., front-end instrumentation amplifiers. |
Compared with LT1207CS#PBF and LT1364CS#PBF, the LT1497CS#PBF uniquely balances ±125mA drive, 50MHz bandwidth, and 7mA supply current - making it optimal for thermally sensitive, medium-power line-driving applications where efficiency and fidelity are co-constrained.
Availability
LT1497CS#PBF is available at Aetrix Electronics and suitable for HDSL2 line drivers, broadcast video amplifiers, cable test equipment, and dual-channel data acquisition systems requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for LT1497CS#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 continuity, documentation, and support for all Linear ICs including the LT1497 family.
The LT1497CS#PBF belongs to Linear Technology's high-speed current feedback amplifier product line, engineered specifically for applications demanding high output current, wide bandwidth, and excellent video-linearity - such as DSL line cards, professional video infrastructure, and automated test equipment.
FAQ
What is the maximum supply voltage rating for LT1497CS#PBF?
The LT1497CS#PBF has an absolute maximum total supply voltage (V+ to V–) rating of 36V, supporting operation from ±2.5V up to ±15V. This wide range allows use in both low-voltage portable systems and industrial ±15V signal chains without level-shifting circuitry. Exceeding ±15V violates the specified operating conditions and may degrade parametric performance or reliability.
Does LT1497CS#PBF support single-supply operation?
Yes, the LT1497CS#PBF supports single-supply operation down to +4V total supply (e.g., V+ = +5V, V– = GND), though input common-mode and output swing ranges are reduced versus split-supply use. For example, at +5V/GND, the input voltage range is 0.5V to 4.0V and maximum output swing is ±2.75V into 100mA - requiring careful biasing in AC-coupled configurations.
How does thermal shutdown behave in LT1497CS#PBF during overload?
When the LT1497CS#PBF junction temperature exceeds 150°C, its thermal shutdown circuit cycles the device between normal operation and high-impedance output state at intervals of ~10ms to several seconds. This protects against permanent damage during sustained output short-circuits or inadequate PCB heatsinking, and the cycling itself causes no reliability degradation.
Can LT1497CS#PBF drive 50Ω coaxial cables directly?
Yes, the LT1497CS#PBF can drive 50Ω coaxial cables directly: it delivers ±125mA per channel and ±12.65V output swing into 100mA loads at ±15V, exceeding the ±100mA required for 5V RMS into 50Ω. For optimal signal integrity, use 560Ω feedback resistors and maintain short, controlled-impedance traces to minimize reflections and parasitic inductance.
What is the small-signal bandwidth of LT1497CS#PBF at ±5V supply?
At ±5V supply, the LT1497CS#PBF achieves 35MHz small-signal bandwidth with RF = RG = 560Ω and RL = 100Ω. Bandwidth scales with supply voltage due to increased internal bias current; it drops to 30MHz at ±2.5V and rises to 50MHz at ±15V - a key consideration when designing for multi-voltage platforms or battery-powered operation.
LT1497CS#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- LT®
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- 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#PBF FAQ
1.How can I place an order for LT1497CS#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1497CS#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 LT1497CS#PBF reliable?
The price and inventory of LT1497CS#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1497CS#PBF is usually 5 days.
3.What payment methods are accepted for LT1497CS#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1497CS#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1497CS#PBF?
LT1497CS#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1497CS#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 LT1497CS#PBF?
For technical support, including LT1497CS#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1497CS#PBF requirements.
6.How does Aetrix verify that LT1497CS#PBF is sourced from the original manufacturer or authorized distributors?
All LT1497CS#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 LT1497CS#PBF meets industry standards.
7.What is the process for return or replacement of LT1497CS#PBF?
All LT1497CS#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1497CS#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 LT1497CS#PBF part is unused and in its original packaging.
Return procedure for LT1497CS#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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