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Analog Devices Inc. LT1818IS5#TRPBF
- Part No.:
- LT1818IS5#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
LT1818IS5#TRPBF.pdf
- Description:
- IC OPAMP VFB 1 CIRCUIT TSOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,598
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Product details
Overview
LT1818IS5#TRPBF from Analog Devices (acquired Linear Technology) is a single, high-speed voltage-feedback operational amplifier optimized for wideband ADC driving and precision signal conditioning. It delivers 400MHz gain-bandwidth product, 2500V/µs slew rate, 6nV/√Hz input noise, ≤1.5mV input offset voltage, and –85dBc harmonic distortion at 5MHz - enabling high-fidelity signal acquisition in oversampling data converters with ±5V or single 5V supplies.
For engineers reviewing the LT1818IS5#TRPBF datasheet, LT1818IS5#TRPBF pinout, LT1818IS5#TRPBF application, or LT1818IS5#TRPBF equivalent, this page provides verified circuit role, TSOT-23 package mapping, unity-gain stable operation with 20pF capacitive load, rail-to-rail output swing into 100Ω, and validated alternatives for high-speed buffer, active filter, and video driver designs.
Technical Context
The LT1818IS5#TRPBF employs a hybrid voltage-feedback topology with current-feedback slewing characteristics, achieving fast transient response without external compensation. Its input stage uses complementary NPN/PNP bipolar transistors for low input bias current cancellation and robust ±6V differential input tolerance.
It operates across –40°C to +85°C with ±1.25V minimum supply voltage, supports single-supply 1V–4V output swing (with 2.5V reference), and maintains stability driving 100Ω loads to ±3.5V on ±5V supplies - making it suitable for DC-coupled ADC front-ends and wideband analog signal paths where distortion and settling time are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 400MHz typical - enables stable closed-loop gain ≥10 up to 40MHz or unity-gain operation to 400MHz. |
| Slew Rate | 2500V/µs (AV = 1) - ensures <10ns 0.1% settling for 5V steps, critical for high-speed DAC/ADC interfaces. |
| Input Noise Voltage | 6nV/√Hz at 10kHz - preserves SNR in sensor amplification and low-level signal chains. |
| Harmonic Distortion | –85dBc HD2 at 5MHz (2VP-P, AV = 2) - meets SFDR requirements for 14-bit+ data acquisition systems. |
| Input Offset Voltage | ≤1.5mV max (–40°C to +85°C) - minimizes DC error in precision instrumentation and calibration circuits. |
| Supply Current | 9mA per amplifier - balances speed and power efficiency for portable or thermally constrained designs. |
| Output Drive | ±40mA min into 100Ω - sustains full-swing performance driving coaxial cables, ADC inputs, or active filters. |
Pinout & Package
LT1818IS5#TRPBF is housed in a 5-lead plastic TSOT-23 package (1.5mm × 2.9mm × 0.95mm, 1mm profile), rated for –40°C to +85°C operation and RoHS-compliant lead-free finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - OUT | Amplifier output | Delivers rail-to-rail swing (±3.5V into 100Ω on ±5V); requires local 0.01µF bypass to ground. |
| 2 - V– | Negative supply | Connects to ground (single supply) or negative rail; serves as thermal and ground reference for package. |
| 3 - +IN | Non-inverting input | High-impedance node (≥1.5MΩ differential); balanced source resistance recommended to minimize offset. |
| 4 - –IN | Inverting input | High-impedance node; feedback network connects here - layout critical for stability at >100MHz. |
| 5 - V+ | Positive supply | Accepts +2.5V to +5.5V (single) or ±1.25V to ±5.5V (dual); bypass with 0.01µF ceramic + optional 1–10µF tantalum. |
Key Features
| Feature | Design Value |
|---|---|
| Unity-gain stable | Operates unconditionally stable with 20pF capacitive load - eliminates need for series output resistor in most PCB layouts. |
| Low distortion | –85dBc HD2 at 5MHz enables >78dB SFDR in 50Msps ADC drivers like LTC1744 without post-processing. |
| Wide supply range | Supports ±1.25V to ±5.5V dual or 2.5V–11V single supply - simplifies integration into mixed-voltage systems. |
| Fast settling | 10ns to 0.1% for 5V step (AV = –1) - meets timing budgets in burst-mode data acquisition and digital sampling. |
| Robust input stage | Withstands ±6V transient differential input - eliminates external clamping diodes in noisy industrial environments. |
Applications
| High-Speed Data Acquisition | Video Signal Buffering |
|---|---|
|
Use Scenario: Driving the AIN+ and AIN– inputs of a 14-bit, 50Msps ADC (e.g., LTC1744) in an oversampling architecture with 2VP-P full-scale range. IC Role / Device Role / Timing Role: Single-supply differential ADC driver providing matched gain, phase, and settling to preserve SFDR and ENOB. Use Value: Achieves 78dB SFDR at 5.1MHz input with no windowing or averaging - directly enabling high-resolution spectral analysis. |
Use Scenario: Buffering composite video (CVBS) or component Y/C signals before transmission over 75Ω coaxial cable. IC Role / Device Role / Timing Role: Unity-gain video line driver with low differential gain/phase error (<0.07%/0.02°) and 125MHz full-power bandwidth. Use Value: Maintains broadcast-grade color fidelity and edge sharpness without requiring external peaking or equalization networks. |
| Active Filter Design | RF/IF Signal Conditioning |
|
Use Scenario: Implementing a 4th-order Butterworth low-pass filter at 20MHz cutoff for anti-aliasing prior to digitization. IC Role / Device Role / Timing Role: High-Q, low-noise op-amp in multiple feedback (MFB) topology with precise pole placement. Use Value: Delivers flat group delay and <0.1dB passband ripple due to 400MHz GBW and 2500V/µs slew rate - minimizing phase distortion. |
Use Scenario: Amplifying IF signals (e.g., 45MHz or 70MHz) in communications receivers before demodulation. IC Role / Device Role / Timing Role: Wideband gain block with 20pF capacitive load drive capability and minimal harmonic generation. Use Value: Provides >80dB channel separation at 100MHz and –72dBc HD3 at 5MHz - preserving adjacent-channel selectivity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT1815IS5#TRPBF | 220MHz GBW, 1500V/µs slew rate, 3.5nV/√Hz noise, programmable supply current (3–12mA) | Lower bandwidth and slew rate; better noise performance and power flexibility | Select when lower power or ultra-low noise dominates over maximum speed in 10–50MHz applications. |
| LT6203IMS8#TRPBF | Dual-channel, 100MHz GBW, rail-to-rail I/O, 1.9nV/√Hz noise, 3mA supply current | Lower speed but superior noise, rail-to-rail input/output, and dual configuration in MSOP-8 | Choose for space-constrained dual-channel designs requiring sub-2nV/√Hz noise and 0–5V signal handling. |
Compared with LT1818IS5#TRPBF, LT1815IS5#TRPBF trades 45% bandwidth for programmable power and lower noise, while LT6203IMS8#TRPBF sacrifices speed for dual-channel integration, rail-to-rail operation, and 68% lower supply current - making each suitable for distinct trade-off priorities in high-fidelity analog signal chains.
Availability
LT1818IS5#TRPBF is available at Aetrix Electronics and suitable for high-speed data acquisition systems, video signal buffering, active filter design, and RF/IF signal conditioning requiring stable component supply across industrial temperature ranges.
Supply support for LT1818IS5#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, Inc. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing technologies, formed through the acquisition of Linear Technology in 2017.
The LT1818IS5#TRPBF belongs to ADI's legacy Linear Technology high-speed op-amp product line, engineered specifically for demanding wideband applications including ADC/DAC interface, video, communications, and test equipment where speed, linearity, and low noise are essential.
FAQ
What is the operating temperature range for LT1818IS5#TRPBF?
The LT1818IS5#TRPBF is specified for continuous operation from –40°C to +85°C, with guaranteed performance across this full industrial temperature range. Electrical parameters such as input offset voltage (≤1.5mV), supply current (9–13mA), and output swing (±3.5V into 100Ω) are tested and validated at both extremes, ensuring reliability in harsh environments like factory automation and outdoor instrumentation.
Can LT1818IS5#TRPBF drive a 50Ω load effectively?
Yes, the LT1818IS5#TRPBF can drive a 50Ω load, delivering ±3.15V output swing and ±30mA minimum output current under –40°C to +85°C conditions. While optimized for 100Ω loads, its ±40mA short-circuit current and 2500V/µs slew rate ensure adequate headroom for 50Ω termination - though thermal derating and careful PCB layout (short traces, ground plane) are recommended for sustained operation.
Is LT1818IS5#TRPBF unity-gain stable with capacitive loads?
Yes, the LT1818IS5#TRPBF is unity-gain stable with up to 20pF capacitive load without external compensation. For loads exceeding 20pF, a small series resistor (10–50Ω) between the output and capacitor is required to maintain stability - a design detail confirmed in the official Linear Technology application notes and validated in typical ADC driver configurations using the LT1818IS5#TRPBF.
What is the maximum supply voltage for LT1818IS5#TRPBF?
The absolute maximum total supply voltage (V+ to V–) for LT1818IS5#TRPBF is 12.6V. It is fully specified for operation at ±5V (10V total) and single 5V supplies. Operation beyond ±5V is not characterized - for example, ±6V (12V total) exceeds the 12.6V absolute maximum and risks permanent damage, so design margins must respect the 12.6V limit and recommended 10V maximum for reliable long-term use.
Does LT1818IS5#TRPBF support single-supply operation?
Yes, the LT1818IS5#TRPBF supports true single-supply operation from 2.5V to 11V. With a 5V supply and 2.5V reference, it delivers 1V to 4V output swing into 100Ω - a 3V p-p range centered at mid-supply. Input common-mode range extends from 0.8V to 3.5V (–40°C to +85°C), enabling direct interfacing with SAR and sigma-delta ADCs without level-shifting circuitry.
LT1818IS5#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- SOT-23-5 Thin, TSOT-23-5
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Voltage Feedback
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 2500V/µs
- Gain Bandwidth Product:
- 400 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 2 µA
- Voltage - Input Offset:
- 200 µV
- Current - Supply:
- 9mA
- Current - Output / Channel:
- 70 mA
- Voltage - Supply Span (Min):
- 2.5 V
- Voltage - Supply Span (Max):
- 12.6 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-5
LT1818IS5#TRPBF FAQ
1.How can I place an order for LT1818IS5#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1818IS5#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 LT1818IS5#TRPBF reliable?
The price and inventory of LT1818IS5#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1818IS5#TRPBF is usually 5 days.
3.What payment methods are accepted for LT1818IS5#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1818IS5#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1818IS5#TRPBF?
LT1818IS5#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1818IS5#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 LT1818IS5#TRPBF?
For technical support, including LT1818IS5#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1818IS5#TRPBF requirements.
6.How does Aetrix verify that LT1818IS5#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT1818IS5#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 LT1818IS5#TRPBF meets industry standards.
7.What is the process for return or replacement of LT1818IS5#TRPBF?
All LT1818IS5#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1818IS5#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 LT1818IS5#TRPBF part is unused and in its original packaging.
Return procedure for LT1818IS5#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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