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Analog Devices Inc. LT1217CS8#PBF
- Part No.:
- LT1217CS8#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LT1217CS8#PBF.pdf
- Description:
- IC OPAMP CFA 1 CIRCUIT 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:2,880
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Product details
Overview
LT1217CS8#PBF from Analog Devices (formerly Linear Technology) is a current feedback amplifier optimized for high-speed, low-power signal conditioning in video, data acquisition, and cable driver applications. It delivers 10MHz bandwidth, 500V/µs slew rate, 280ns settling to 0.1%, and operates from ±5V to ±15V supplies with only 1mA quiescent current. Its shutdown pin enables power gating for system-level energy management.
For engineers reviewing the LT1217CS8#PBF datasheet, LT1217CS8#PBF pinout, LT1217CS8#PBF application, or LT1217CS8#PBF equivalent, key selection criteria include its current-feedback architecture, 50mA minimum output drive, ±1mV input offset voltage, and SOIC-8 package compatibility with legacy op-amp footprints.
Technical Context
The LT1217CS8#PBF uses a proprietary complementary bipolar process to achieve low 1mA supply current while maintaining high-speed performance. Its current-feedback topology decouples bandwidth from closed-loop gain-bandwidth remains stable across gains when RF is held constant, unlike voltage-feedback amplifiers.
It features dual-stage slew limiting: input stage ~50V/µs, output stage up to 850V/µs (dependent on RF), enabling predictable large-signal response. The shutdown function (Pin 8) reduces supply current to ≤350µA and places the output in high-impedance state without external circuitry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Bandwidth | 10MHz at AV = 1, RF = RG = 3kΩ - supports high-fidelity video and IF signal amplification |
| Slew Rate | 500V/µs (typical, non-inverting, ±15V) - enables clean 10V step reproduction with minimal distortion |
| Settling Time | 280ns to 0.1% for 10V step - meets timing requirements of 8–12-bit ADC drivers and fast DAC buffers |
| Input Offset Voltage | ±1mV (max) - ensures DC accuracy in precision gain stages and sensor signal chains |
| Output Drive | ≥50mA (min) into short circuit - drives 75Ω coaxial cables and low-Z loads without external buffering |
| Supply Range | ±5V to ±15V - interoperable with legacy industrial and test equipment rails |
| Quiescent Current | 1mA (typical), 350µA in shutdown - enables battery-powered or thermally constrained designs |
| Input Resistance | 100MΩ (typical) - minimizes loading on high-impedance sources like photodiode transimpedance nodes |
Pinout & Package
LT1217CS8#PBF is housed in an 8-lead plastic SOIC (S8) package with standard industry pinout and 150°C maximum junction temperature. Thermal resistance θJA is 150°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Null / Offset Adjust | Connects to internal offset null network; pulling ~30µA adjusts output offset voltage |
| 2 | Inverting Input (–IN) | Current-summing node for feedback; requires resistive (not capacitive) termination for stability |
| 3 | Non-Inverting Input (+IN) | High-impedance (100MΩ || 3pF) input node; common-mode range extends to ±12V |
| 4 | V– | Negative supply rail connection; supports operation down to –5V |
| 5 | Null / Offset Adjust | Second terminal for external offset trim; used with Pin 1 for 100kΩ potentiometer interface |
| 6 | Output (OUT) | Class-AB output stage capable of ±13V swing into 2kΩ and ≥50mA short-circuit current |
| 7 | V+ | Positive supply rail connection; supports operation up to +15V |
| 8 | Shutdown | Active-low control: sinking ≥50µA forces shutdown mode (350µA ICC, high-Z output) |
Key Features
| Feature | Design Value |
|---|---|
| Current Feedback Architecture | Maintains >10MHz bandwidth across gains of 2–100 when RF fixed at 3kΩ - eliminates gain-bandwidth trade-off |
| Programmable Shutdown | Pin 8 interface requires no external components; logic-level compatible with open-drain GPIO or microcontroller outputs |
| Robust Output Drive | Delivers ≥50mA into 0Ω load and drives 75Ω cables directly - replaces discrete buffer stages in video distribution |
| Wide Supply Flexibility | Operates from ±4.5V to ±18V; tolerates asymmetric rails with only 350µV/V mismatch-induced offset degradation |
| Low Input Bias Current | ±100nA (max) - preserves signal integrity in high-impedance transducer interfaces and filter networks |
| Stable Capacitive Load Driving | Supports direct drive of flash ADC inputs via increased RF; maximum capacitive load defined per RF value (e.g., 1000pF @ RF = 5.1kΩ) |
Applications
| Video Amplifiers | Cable Drivers |
|---|---|
Use Scenario: Amplifying composite video signals in broadcast equipment and CCTV systems before transmission over coaxial cable. IC Role / Device Role / Timing Role: Current feedback amplifier configured as unity-gain buffer with 75Ω source/load termination. Use Value: 10MHz bandwidth and 500V/µs slew rate preserve rise/fall times of sync pulses and luminance detail without phase distortion. | Use Scenario: Driving long 75Ω coaxial runs from FPGA DAC outputs to remote analog front-ends in test instrumentation. IC Role / Device Role / Timing Role: High-current output stage delivering 50mA into 75Ω load with minimal group delay variation. Use Value: Maintains signal fidelity over 100m+ cable lengths due to low output impedance and controlled transient response (280ns settling). |
| IF and RF Amplification | 8–12-Bit Data Acquisition Systems |
Use Scenario: Intermediate frequency amplification in SDR receivers operating at 1–10MHz with variable gain control. IC Role / Device Role / Timing Role: Fixed-gain current feedback amplifier with RF/RC tuning for flat group delay and minimal harmonic distortion. Use Value: 100MHz gain-bandwidth product enables stable 100× gain at 1MHz, supporting wide dynamic range IF chain design. | Use Scenario: Buffering and level-shifting outputs of 12-bit SAR ADCs feeding FPGA-based digital processing pipelines. IC Role / Device Role / Timing Role: Fast-settling driver ensuring full-scale transitions settle within 280ns to meet 1MSPS sampling timing budgets. Use Value: 0.1% settling in <300ns prevents aperture error accumulation and maintains effective resolution in high-speed DAQ systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current feedback amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT1360CS8#PBF | Higher 220MHz GBW, 1000V/µs slew rate, 2.5mA IQ; same SOIC-8 pinout | Better suited for >50MHz IF stages but consumes >2× power | Select when bandwidth >20MHz is required and thermal budget allows higher IQ |
| AD811ARZ | 100MHz GBW, 2500V/µs slew, ±15V supply only, SOIC-8; no shutdown pin | Lacks power-gating capability and has narrower supply range | Choose for ultra-high slew applications where shutdown is unnecessary and supply rails are fixed |
Compared with LT1217CS8#PBF, LT1360CS8#PBF offers higher speed at increased power cost, while AD811ARZ provides extreme slew performance but sacrifices supply flexibility and power management-making LT1217CS8#PBF optimal for balanced speed, efficiency, and feature integration.
Availability
LT1217CS8#PBF is available at Aetrix Electronics and suitable for video amplification, cable driving, IF signal conditioning, and 8–12-bit data acquisition systems requiring stable component supply across extended production cycles.
Supply support for LT1217CS8#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 its high-performance analog portfolio. Linear Technology specialized in precision, high-speed, and power-efficient analog ICs for demanding industrial and communications applications.
The LT1217CS8#PBF belongs to Linear's current feedback amplifier family, designed specifically for applications needing wide bandwidth without sacrificing DC precision or power efficiency-targeting video, instrumentation, and high-speed data interface markets.
FAQ
What is the maximum capacitive load the LT1217CS8#PBF can drive stably?
The LT1217CS8#PBF can drive up to 1000pF with RF = 5.1kΩ (5dB peaking limit), or 100pF with RF = 3kΩ. For heavier loads, isolate with a 10–20Ω series resistor at the output or increase RF proportionally. Direct capacitive loading is supported for flash ADC interfaces where bandwidth reduction is acceptable.
Does the LT1217CS8#PBF require external compensation components?
No, the LT1217CS8#PBF is internally compensated and requires no external capacitors for stability under standard configurations. Stability depends critically on keeping the inverting input node resistive-stray capacitance at Pin 2 must be minimized, and feedback must be implemented with pure resistance (RF) rather than reactive elements.
How does shutdown mode affect the output state of the LT1217CS8#PBF?
In shutdown mode (Pin 8 pulled low with ≥50µA), the LT1217CS8#PBF disables its output stage and places the OUT pin (Pin 6) in a high-impedance state. This prevents loading of downstream circuits and eliminates output current flow, making it safe to multiplex or isolate signal paths without additional switches.
Can the LT1217CS8#PBF operate from a single +12V supply?
Yes-the LT1217CS8#PBF supports single-supply operation. With V+ = +12V and V– = 0V, the input common-mode range extends from 0V to +10V and output swings from +1V to +11V into 2kΩ. Ensure input signals remain within these rails and use appropriate level-shifting if interfacing with bipolar sources.
What is the typical input noise performance of the LT1217CS8#PBF?
The LT1217CS8#PBF exhibits 6.5nV/√Hz input voltage noise density at 1kHz (RF = 1kΩ, RG = 10Ω) and 0.7pA/√Hz input current noise density under the same conditions. These values make it suitable for medium-bandwidth, moderate-impedance applications where noise contribution must stay below 10nV/√Hz.
LT1217CS8#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- Current Feedback
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 500V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 10 MHz
- Current - Input Bias:
- 100 nA
- Voltage - Input Offset:
- 1 mV
- Current - Supply:
- 1mA
- Current - Output / Channel:
- 100 mA
- Voltage - Supply Span (Min):
- 9 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO
LT1217CS8#PBF FAQ
1.How can I place an order for LT1217CS8#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1217CS8#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 LT1217CS8#PBF reliable?
The price and inventory of LT1217CS8#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1217CS8#PBF is usually 5 days.
3.What payment methods are accepted for LT1217CS8#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1217CS8#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1217CS8#PBF?
LT1217CS8#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1217CS8#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 LT1217CS8#PBF?
For technical support, including LT1217CS8#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1217CS8#PBF requirements.
6.How does Aetrix verify that LT1217CS8#PBF is sourced from the original manufacturer or authorized distributors?
All LT1217CS8#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 LT1217CS8#PBF meets industry standards.
7.What is the process for return or replacement of LT1217CS8#PBF?
All LT1217CS8#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1217CS8#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 LT1217CS8#PBF part is unused and in its original packaging.
Return procedure for LT1217CS8#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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