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Analog Devices Inc. LT1497CS8#PBF
- Part No.:
- LT1497CS8#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LT1497CS8#PBF.pdf
- Description:
- IC OPAMP CFA 2 CIRCUIT 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:118
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Product details
Overview
LT1497CS8#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, 50MHz bandwidth at ±15V supply, 900V/µs slew rate, and ±3.1V output swing into 100mA load at ±5V - enabling robust twisted-pair and coaxial cable driving in HDSL2 and broadcast video systems.
For engineers reviewing the LT1497CS8#PBF datasheet, LT1497CS8#PBF pinout, LT1497CS8#PBF application, or LT1497CS8#PBF equivalent, key selection criteria include thermal performance in SO-8 package (θJA = 80°C/W), ±5V operation capability, differential gain (0.08% @ ±5V), settling time (50ns to 0.1%), and current-feedback architecture requiring precise feedback resistor selection (e.g., 560Ω for AV = –1).
Technical Context
The LT1497CS8#PBF implements a complementary bipolar current-feedback architecture with separate high-impedance noninverting inputs and low-impedance inverting inputs. Its transresistance gain (ROL ≥ 100kΩ) and wide supply range (±2.5V to ±5V) enable stable operation across low-voltage video and telecom interfaces without external level-shifting.
Thermal shutdown protection activates above 150°C junction temperature, and its SO-8 package features enhanced thermal resistance specifically rated for ±5V operation - distinct from the 16-pin SO variant (LT1497CS) intended for ±15V use. Channel separation exceeds 100dB at ±5V, supporting dual-channel integrity in differential drivers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Bandwidth | 35MHz at ±5V supply, RF = RG = 560Ω, RL = 100Ω - enables full HD video signal amplification up to 30MHz baseband. |
| Slew Rate | 350V/µs typical at ±5V - supports fast transient response for 5V-step signals with ≤50ns 0.1% settling. |
| Output Swing | ±3.1V into 100mA load at ±5V - drives 50Ω/75Ω cables directly without external boost stages. |
| Differential Gain | 0.08% at ±5V, RL = 150Ω - meets NTSC/PAL broadcast video fidelity requirements. |
| Supply Current | 7mA per amplifier at ±5V - enables dual-channel high-speed amplification within 14mA total system budget. |
| Input Offset Voltage | ±10mV max over temperature - ensures DC-coupled video chain accuracy without per-channel trimming. |
| Channel Separation | 115dB at ±5V - prevents crosstalk between dual channels in stereo audio or differential line drivers. |
Pinout & Package
LT1497CS8#PBF uses an 8-lead plastic SO (narrow, 0.150") package with exposed pad not electrically connected. Thermal resistance θJA = 80°C/W on standard 2oz copper PCB.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1: OUT A | Amplifier A output | Low-impedance current-feedback output capable of ±125mA drive into 50Ω loads. |
| 2: –IN A | Inverting input A | Low-impedance node (≈20Ω) requiring resistive feedback; sensitive to stray capacitance. |
| 3: +IN A | Noninverting input A | High-impedance FET-input node (≥1.5MΩ); sets common-mode reference point. |
| 4: V– | Negative supply rail | Shared negative rail for both amplifiers; must be decoupled with ≥0.1µF ceramic near pin. |
| 5: V+ | Positive supply rail | Shared positive rail for both amplifiers; supports ±2.5V to ±5V operation. |
| 6: OUT B | Amplifier B output | Independent output identical to OUT A; enables dual-channel or paralleled 250mA drive. |
| 7: –IN B | Inverting input B | Functionally identical to –IN A; requires matched feedback network for channel matching. |
| 8: +IN B | Noninverting input B | Functionally identical to +IN A; allows independent DC biasing for differential configurations. |
Key Features
| Feature | Design Value |
|---|---|
| Enhanced SO-8 thermal design | θJA = 80°C/W enables continuous ±5V operation without heatsink in compact layouts. |
| Thermal shutdown protection | Activates at TJ > 150°C and cycles safely - prevents latch-up during overload or poor PCB heat sinking. |
| Low distortion at 1MHz | –70dBc 2nd/3rd harmonic distortion at ±40mA peak output - suitable for HDSL2 line drivers. |
| Differential phase accuracy | 0.045° at ±5V, RL = 150Ω - preserves color timing in composite video distribution. |
| Current-feedback architecture | Bandwidth remains stable across gain settings via feedback resistor tuning (e.g., 270Ω–1kΩ). |
Applications
| HDSL2 Single-Pair Line Driver | Broadcast Video Distribution Amplifier |
|---|---|
Use Scenario: Driving twisted-pair telecom lines in HDSL2 transceivers with ±40mA peak differential signals up to 1MHz. IC Role / Device Role / Timing Role: Dual-channel current-feedback amplifier configured as differential line driver with 560Ω feedback. Use Value: –70dBc harmonic distortion at 1MHz and 50ns settling ensure compliance with ITU-T G.991.2 spectral mask and jitter limits. | Use Scenario: Distributing NTSC composite video signals to multiple monitors or recording devices with minimal degradation. IC Role / Device Role / Timing Role: Dual video buffer with AV = 2, driving 75Ω coaxial cables and maintaining sync pulse integrity. Use Value: 0.08% differential gain and 0.045° differential phase preserve color fidelity and horizontal timing across all outputs. |
| Test Equipment Signal Generator Output Stage | Industrial Analog Front-End Buffer |
Use Scenario: Providing programmable amplitude and offset control in automated test equipment output modules. IC Role / Device Role / Timing Role: High-slew-rate output driver for arbitrary waveform generators requiring ±3.1V swing into 50Ω. Use Value: 350V/µs slew rate and 50ns 0.1% settling support fast step response testing up to 10MHz bandwidth. | Use Scenario: Isolating and amplifying sensor signals (e.g., strain gauge bridges) in industrial PLC analog input modules. IC Role / Device Role / Timing Role: Precision dual buffer with rail-to-rail output swing and low 7mA supply current per channel. Use Value: ±3.1V output swing at ±5V supply enables full-scale utilization of 12-bit ADCs without external level-shifting. |
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#PBF | Higher output drive (±250mA), wider bandwidth (60MHz at ±15V), but higher supply current (40mA per amp at ±15V); not rated for ±5V operation. | Requires ±15V supply; unsuitable for low-voltage systems where LT1497CS8#PBF's ±5V compatibility is essential. | Select LT1207CS8#PBF only when ≥±12V supplies and >200mA drive are required; avoid for ±5V designs. |
| LT1364CS8#PBF | 70MHz bandwidth, 1000V/µs slew rate, C-Load™ stability with capacitive loads; lower output drive (±50mA), no thermal shutdown. | Lacks thermal protection and ±125mA drive; optimized for capacitive-load buffering rather than cable driving. | Choose LT1364CS8#PBF for high-fidelity op-amp-style buffering where load capacitance >100pF exists; not a drop-in replacement. |
Compared with LT1207CS8#PBF and LT1364CS8#PBF, LT1497CS8#PBF uniquely balances ±5V operation, ±125mA drive, integrated thermal protection, and video-grade linearity - making it the only option qualified for space-constrained HDSL2 and broadcast video designs operating strictly at ±5V.
Availability
LT1497CS8#PBF is available at Aetrix Electronics and suitable for HDSL2 line drivers, broadcast video distribution amplifiers, and test equipment output stages requiring stable component supply, consistent parametric performance, and long-term industrial availability.
Supply support for LT1497CS8#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 manufacturing for legacy Linear parts including the LT1497 family.
The LT1497 product line was designed specifically for high-speed, high-output-current analog signal conditioning in telecom line drivers and professional video infrastructure - bridging performance between the LT1229 and LT1207 families.
FAQ
What is the maximum safe supply voltage for LT1497CS8#PBF?
The absolute maximum total supply voltage (V+ to V–) for LT1497CS8#PBF is 14V, meaning it supports operation up to ±7V. However, the device is characterized and optimized for ±2.5V to ±5V operation. Exceeding ±5V risks exceeding the specified thermal resistance (θJA = 80°C/W) and may trigger thermal shutdown under load. Always refer to the Absolute Maximum Ratings table in the official datasheet for LT1497CS8#PBF before designing for higher voltages.
Can LT1497CS8#PBF drive a 50Ω coaxial cable directly?
Yes, LT1497CS8#PBF can drive a 50Ω coaxial cable directly: at ±5V supply, it delivers ±3.1V output swing into 100mA, which corresponds to 6.2Vpp into 50Ω (124mA peak). Its 35MHz bandwidth and low distortion (–70dBc at 1MHz) make it suitable for SDI-like baseband video or HDSL2 line driving. Ensure proper termination and layout - especially minimizing capacitance on the –IN pins - to maintain stability per the LT1497CS8#PBF Applications Information section.
Does LT1497CS8#PBF have built-in thermal protection?
Yes, LT1497CS8#PBF includes thermal shutdown protection that activates when junction temperature exceeds 150°C. When triggered, the device cycles between normal operation and an off state at a slow rate (10ms to seconds), preventing permanent damage. This feature is explicitly documented in the Features and Applications Information sections of the LT1497CS8#PBF datasheet and is implemented in silicon - not dependent on external circuitry.
What feedback resistor value should I use for gain = –1 with LT1497CS8#PBF at ±5V?
For gain = –1 configuration at ±5V supply, the recommended feedback resistor for LT1497CS8#PBF is 560Ω (with RG = 560Ω), delivering 32MHz bandwidth and <1dB peaking per the Small-Signal Bandwidth table. Using 430Ω increases bandwidth to ~35MHz but introduces ~2dB peaking; 750Ω reduces peaking but lowers bandwidth to ~28MHz. The LT1497CS8#PBF datasheet specifies 560Ω as the optimum trade-off for flat response and stability in ±5V applications.
Is LT1497CS8#PBF pin-compatible with LT1497CS?
No, LT1497CS8#PBF is not pin-compatible with LT1497CS. LT1497CS8#PBF uses an 8-pin SO package with dual amplifier routing (OUT A, –IN A, +IN A, V–, V+, OUT B, –IN B, +IN B), while LT1497CS uses a 16-pin SO package with additional NC pins and duplicated V– pins. Their pinouts differ fundamentally - attempting to substitute one for the other on the same PCB will result in incorrect connections and functional failure. Always verify package drawings (S8 vs S) in the LT1497CS8#PBF and LT1497CS datasheets before layout.
LT1497CS8#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- LT®
- Package/Case:
- 8-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:
- 8-SO
LT1497CS8#PBF FAQ
1.How can I place an order for LT1497CS8#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1497CS8#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 LT1497CS8#PBF reliable?
The price and inventory of LT1497CS8#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1497CS8#PBF is usually 5 days.
3.What payment methods are accepted for LT1497CS8#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1497CS8#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1497CS8#PBF?
LT1497CS8#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1497CS8#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 LT1497CS8#PBF?
For technical support, including LT1497CS8#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1497CS8#PBF requirements.
6.How does Aetrix verify that LT1497CS8#PBF is sourced from the original manufacturer or authorized distributors?
All LT1497CS8#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 LT1497CS8#PBF meets industry standards.
7.What is the process for return or replacement of LT1497CS8#PBF?
All LT1497CS8#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1497CS8#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 LT1497CS8#PBF part is unused and in its original packaging.
Return procedure for LT1497CS8#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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