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Analog Devices Inc. LT1220CS8#TRPBF
- Part No.:
- LT1220CS8#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LT1220CS8#TRPBF.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:753
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Product details
Overview
LT1220CS8#TRPBF from Analog Devices (formerly Linear Technology) is a high-speed, unity-gain stable operational amplifier optimized for precision data acquisition and video signal conditioning. It delivers 45MHz gain-bandwidth, 250V/µs slew rate, 75ns 0.1% settling time, and drives ≥10,000pF capacitive loads - enabling direct coaxial cable driving in broadcast video systems.
For engineers reviewing the LT1220CS8#TRPBF datasheet, LT1220CS8#TRPBF pinout, LT1220CS8#TRPBF application, or LT1220CS8#TRPBF equivalent, key selection criteria include its C-Load™ stability architecture, ±12V output swing into 500Ω, differential gain/phase performance (0.1%/0.2° at 3.58MHz), and guaranteed operation over –40°C to 85°C industrial temperature range.
Technical Context
The LT1220CS8#TRPBF employs a single-stage complementary bipolar architecture with proprietary DC gain enhancement, achieving precision-level input offset voltage (1mV max) and bias current (300nA max) without sacrificing speed. Its internal compensation enables unity-gain stability while maintaining 45MHz bandwidth and 250V/µs slew rate.
Capacitive load drive capability is implemented via output-pole sensing and adaptive gain-node compensation - not external components - allowing stable operation with 10,000pF loads and predictable peaking vs. capacitance curves. Input bias current cancellation eliminates need for impedance matching on inverting/non-inverting inputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 45MHz - supports closed-loop bandwidth up to 45MHz at unity gain; enables fast filter and buffer designs. |
| Slew Rate | 250V/µs - ensures <75ns 0.1% settling for 10V steps; critical for 12-bit DAC I/V conversion fidelity. |
| Input Offset Voltage | 1mV max - limits DC error in precision amplification; enables sub-LSB accuracy in 12-bit data acquisition. |
| Output Swing | ±12V into 500Ω - delivers full dynamic range with standard ±15V supplies; avoids clipping in video line drivers. |
| Differential Gain/Phase | 0.1% / 0.2° at 3.58MHz - meets NTSC/PAL broadcast video specifications for color fidelity. |
| Capacitive Load Drive | Stable with ≥10,000pF - allows direct connection to coaxial cables without external isolation resistors. |
| Supply Current | 10.5mA typical - balances speed and power efficiency for high-performance analog signal chains. |
Pinout & Package
LT1220CS8#TRPBF is housed in an 8-lead plastic SOIC (S8) package, 3.9mm × 4.9mm body, 1.27mm lead pitch, RoHS-compliant, tape-and-reel packaged.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (NULL) | Offset Null | Connects to internal nulling circuitry; unused in most applications but required for sub-mV offset trimming. |
| 2 (–IN) | Inverting Input | Differential input node; high-impedance (45MΩ), low-bias-current (300nA max) terminal for feedback networks. |
| 3 (+IN) | Non-Inverting Input | Differential input node; matched bias current cancellation eliminates need for input impedance balancing. |
| 4 (V–) | Negative Supply | Accepts –15V to –1.5V; supports rail-to-rail input common-mode range down to –13V. |
| 5 (NULL) | No Connect | Internally unconnected; must be left floating or tied to ground per layout best practices. |
| 6 (V+) | Positive Supply | Accepts +1.5V to +15V; supports rail-to-rail input common-mode range up to +14V. |
| 7 (VOUT) | Output | Class-AB output stage capable of ±26mA drive into 500Ω; stable with >10nF capacitive loads. |
| 8 (NC) | No Connect | Internally unconnected; must remain unconnected per datasheet guidance. |
Key Features
| Feature | Design Value |
|---|---|
| C-Load™ Stability Architecture | Internal compensation enables unity-gain stability with ≥10,000pF capacitive loads - no external components needed for cable driving. |
| DC Precision at High Speed | 1mV max VOS + 300nA max IB + 20V/mV min DC gain - achieves 12-bit accuracy in fast-settling DAC interfaces. |
| Video-Optimized AC Performance | 0.1% differential gain / 0.2° differential phase at 3.58MHz - satisfies broadcast-grade NTSC/PAL signal integrity requirements. |
| Fast Settling for Data Acquisition | 75ns to 0.1%, 95ns to 0.01% for 10V step - enables high-throughput sampling in 8-/10-/12-bit ADC front-ends. |
| Wide Supply Range & Output Swing | ±1.5V to ±15V supply; ±12V output into 500Ω - maximizes dynamic range in ±15V industrial and test equipment rails. |
Applications
| Video Line Driver | Cable Driver |
|---|---|
|
Use Scenario: Driving 75Ω coaxial video lines in broadcast switchers and distribution amplifiers. IC Role / Device Role / Timing Role: Unity-gain buffer with C-Load™ compensation, delivering flat frequency response to 45MHz and minimal group delay distortion. Use Value: Eliminates external series termination resistors while maintaining 0.1% differential gain and 0.2° phase error at 3.58MHz NTSC color subcarrier. |
Use Scenario: Transmitting high-fidelity analog signals over long coaxial runs in test instrumentation. IC Role / Device Role / Timing Role: High-current output driver with adaptive capacitive-load compensation, sustaining 250V/µs slew into 1000pF+ loads. Use Value: Enables direct connection to 50Ω/75Ω cables without added isolation components, preserving pulse fidelity and reducing BOM count. |
| DAC Current-to-Voltage Converter | High-Speed Active Filter |
|
Use Scenario: Converting 2mA full-scale current output from 12-bit DACs (e.g., AD565A) to ±10V voltage output. IC Role / Device Role / Timing Role: Precision transimpedance amplifier with low VOS, low IB, and 75ns 0.1% settling for sub-LSB accuracy. Use Value: Achieves <300ns 1/2-LSB settling (1.2mV) and worst-case 6mV error over –40°C to 85°C - meeting industrial DAC interface specs. |
Use Scenario: Implementing 4th-order Butterworth filters at 1MHz in medical imaging and spectrum analysis front-ends. IC Role / Device Role / Timing Role: High-GBW, low-distortion op-amp in multiple-feedback (MFB) and Sallen-Key topologies. Use Value: Maintains <0.01% THD+N at 1MHz with 3VRMS output into 500Ω - enabling clean anti-aliasing and reconstruction filtering. |
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 |
|---|---|---|---|
| LT1221CS8#TRPBF | 150MHz GBW, requires minimum gain ≥4; higher bandwidth but reduced DC precision (3.5mV VOS max). | Better suited for fixed-gain ≥4 video gain stages or RF IF amplification where speed dominates DC error. | Select when closed-loop gain ≥4 and bandwidth >45MHz is required; avoid for unity-gain buffers or precision I/V conversion. |
| AD817ARZ | 50MHz GBW, 350V/µs slew, 1.5mV VOS max; no C-Load™ architecture - unstable with >100pF loads without external compensation. | Preferred for general-purpose high-speed amplification where capacitive loading is minimal or controllable. | Choose for cost-sensitive, non-cable-driving applications requiring lower power (5.5mA IS) and adequate 50MHz bandwidth. |
Compared with LT1220CS8#TRPBF, LT1221CS8#TRPBF trades DC precision for higher bandwidth at gain ≥4, while AD817ARZ offers lower quiescent current but lacks intrinsic capacitive-load stability - making LT1220CS8#TRPBF uniquely suitable for unity-gain, high-fidelity cable and video applications.
Availability
LT1220CS8#TRPBF is available at Aetrix Electronics and suitable for video line drivers, DAC current-to-voltage converters, high-speed active filters, and industrial data acquisition systems requiring stable component supply across extended temperature ranges.
Supply support for LT1220CS8#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) acquired Linear Technology in 2017 and maintains full product support, manufacturing, and documentation for the LT1220 family.
The LT1220CS8#TRPBF belongs to Linear Technology's C-Load™ high-speed op-amp product line, engineered specifically for unity-gain-stable, capacitive-load-tolerant applications in broadcast video, test equipment, and precision data acquisition.
FAQ
What is the operating temperature range for LT1220CS8#TRPBF?
The LT1220CS8#TRPBF is specified and tested over the industrial temperature range of –40°C to +85°C. While commercial-grade testing occurs from 0°C to 70°C, the device is fully characterized and guaranteed for continuous operation across –40°C to 85°C - making it suitable for demanding industrial and automotive under-hood environments where thermal stability is critical. This range is confirmed in the Absolute Maximum Ratings and Electrical Characteristics tables of the official Analog Devices datasheet for LT1220CS8#TRPBF.
Does LT1220CS8#TRPBF require external compensation for capacitive loads?
No, LT1220CS8#TRPBF does not require external compensation for capacitive loads. Its proprietary C-Load™ architecture provides internal adaptive compensation that maintains stability with loads up to and exceeding 10,000pF. This eliminates the need for series isolation resistors or external RC networks typically required by conventional op-amps - simplifying PCB layout and improving signal integrity in coaxial cable driver and DAC I/V converter applications using LT1220CS8#TRPBF.
What is the maximum output current capability of LT1220CS8#TRPBF?
The LT1220CS8#TRPBF delivers a minimum output current of ±24mA into ±12V loads (per Electrical Characteristics table), with typical performance reaching ±26mA. This high output drive supports direct interfacing with 50Ω/75Ω transmission lines and heavy resistive loads without external buffering. The output stage remains stable under short-circuit conditions indefinitely, though thermal derating is recommended for sustained high-current operation - a key specification verified in the Absolute Maximum Ratings section for LT1220CS8#TRPBF.
Can LT1220CS8#TRPBF be used as a drop-in replacement for HA2542 or AD847?
Yes, LT1220CS8#TRPBF is documented as a functional replacement for HA2542, AD847, EL2020, and LM6361 in the Applications Information section of its datasheet - provided nulling circuitry is removed. However, it is not pin-compatible with all legacy footprints due to differing pin 1 (NULL) and pin 5 (NULL) assignments. Layout adaptation is required for HA2542/AD847 sockets; the LT1220CS8#TRPBF's S8 package has distinct pinout and thermal characteristics that must be validated in the target system before deployment.
What is the small-signal settling time specification for LT1220CS8#TRPBF?
The LT1220CS8#TRPBF achieves 75ns settling time to 0.1% and 95ns to 0.01% for a 10V step input under unity-gain conditions. These values are measured at TA = 25°C, VS = ±15V, and are guaranteed across the full –40°C to +85°C operating range per the Electrical Characteristics table. This performance enables high-throughput sampling in 12-bit data acquisition systems where sub-100ns settling is mandatory - a core design metric explicitly validated for LT1220CS8#TRPBF in its official characterization data.
LT1220CS8#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- C-Load™
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 250V/µs
- Gain Bandwidth Product:
- 45 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 100 nA
- Voltage - Input Offset:
- 500 µV
- Current - Supply:
- 8mA
- Current - Output / Channel:
- 26 mA
- Voltage - Supply Span (Min):
- 10 V
- Voltage - Supply Span (Max):
- 30 V
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO
LT1220CS8#TRPBF FAQ
1.How can I place an order for LT1220CS8#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1220CS8#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 LT1220CS8#TRPBF reliable?
The price and inventory of LT1220CS8#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1220CS8#TRPBF is usually 5 days.
3.What payment methods are accepted for LT1220CS8#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1220CS8#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1220CS8#TRPBF?
LT1220CS8#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1220CS8#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 LT1220CS8#TRPBF?
For technical support, including LT1220CS8#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1220CS8#TRPBF requirements.
6.How does Aetrix verify that LT1220CS8#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT1220CS8#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 LT1220CS8#TRPBF meets industry standards.
7.What is the process for return or replacement of LT1220CS8#TRPBF?
All LT1220CS8#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1220CS8#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 LT1220CS8#TRPBF part is unused and in its original packaging.
Return procedure for LT1220CS8#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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