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Analog Devices Inc. LT1222CS8#TRPBF
- Part No.:
- LT1222CS8#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LT1222CS8#TRPBF.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:4,936
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Product details
Overview
LT1222CS8#TRPBF from Analog Devices (formerly Linear Technology) is a high-speed, low-noise operational amplifier optimized for precision wideband applications. It delivers 500MHz gain-bandwidth, 200V/μs slew rate, 3nV/√Hz input voltage noise, and stable operation at noise gain ≥10 without external compensation-enabling use in 10-bit to 12-bit data acquisition systems, video buffers, and RF signal conditioning circuits.
For engineers reviewing the LT1222CS8#TRPBF datasheet, LT1222CS8#TRPBF pinout, LT1222CS8#TRPBF application, or LT1222CS8#TRPBF equivalent, key selection considerations include its C-load drive capability, external compensation pin (Pin 5), ±12V output swing into 500Ω, 75ns 0.1% settling time, and SOIC-8 package compatibility with high-frequency layout requirements.
Technical Context
The LT1222CS8#TRPBF employs a single-stage complementary bipolar architecture with proprietary DC gain enhancement, enabling simultaneous high speed and precision. Its internal compensation node (Pin 5) supports bandwidth/slew-rate trade-offs via external capacitance, while bias current cancellation ensures matched input bias and offset currents.
It achieves stability with capacitive loads up to 10,000pF by sensing load-induced poles and dynamically adjusting internal compensation. The amplifier maintains 0.4% differential gain and 0.1° differential phase at 3.58MHz (AV = 2, RL = 150Ω), confirming suitability for composite video and high-fidelity analog signal paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 500MHz - Enables 5MHz bandwidth at AV = 100, supporting high-resolution sampling front-ends. |
| Slew Rate | 200V/μs - Supports full-scale 10V transitions in ≤50ns, critical for fast-settling ADC drivers. |
| Input Voltage Noise | 3nV/√Hz - Low noise floor preserves SNR in sensor interfaces and preamp stages. |
| Settling Time (0.1%) | 75ns - Meets timing budgets for 10–12-bit data acquisition at multi-MSPS rates. |
| Output Swing (RL = 500Ω) | ±12V - Delivers rail-to-rail usable dynamic range with ±15V supplies. |
| Input Offset Voltage (max) | 300μV - Ensures <0.003% gain error in precision gain blocks and instrumentation amps. |
| Common-Mode Rejection | 120dB - Rejects supply and ground noise in single-supply referenced signal chains. |
Pinout & Package
LT1222CS8#TRPBF is housed in an 8-lead plastic SOIC (S8) package with standard JEDEC MS-012AC dimensions (0.150" width), θJA = 190°C/W, and operating junction temperature up to 150°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (NC) | No Connect | Internally unused; must be left floating or tied to ground per layout best practice. |
| 2 (–IN) | Inverting Input | Differential input node; low input capacitance (2pF) minimizes feedback network peaking. |
| 3 (+IN) | Noninverting Input | High-impedance input (45MΩ) with matched bias current cancellation for minimal offset drift. |
| 4 (V–) | Negative Supply | Accepts –15V max; supports dual-supply operation down to ±5V for low-power designs. |
| 5 (COMP) | Compensation Node | Access point for external capacitor to adjust bandwidth, slew rate, or reduce overshoot; enables clamping via Schottky diodes. |
| 6 (VOUT) | Output | Capable of sourcing/sinking 26mA; drives 75Ω coax directly with series termination for pulse fidelity. |
| 7 (V+) | Positive Supply | Accepts +15V max; PSRR >98dB ensures immunity to supply ripple in mixed-signal systems. |
| 8 (NC) | No Connect | Internally unused; no connection required for functional operation. |
Key Features
| Feature | Design Value |
|---|---|
| C-Load™ Drive Capability | Stable with up to 10,000pF capacitive load-eliminates need for isolation resistors in cable driver and ADC buffer applications. |
| External Compensation Pin | Pin 5 allows precise bandwidth/slew-rate tuning (e.g., 10pF → ~100MHz GBW, 46V/μs SR) without redesigning feedback networks. |
| Low Input Bias Current Matching | IB+ and IB– match within 100nA (typ), removing need for input impedance balancing in precision transimpedance amplifiers. |
| High DC Gain (100 V/mV) | Ensures <0.1% gain error in closed-loop configurations with feedback resistors ≤5kΩ, improving accuracy in gain-setting networks. |
| Output Clamping via COMP Pin | Enables ±0.5V output limiting using back-to-back Schottky diodes on Pin 5-critical for protecting downstream ADC inputs during overvoltage events. |
Applications
| Video Signal Conditioning | Data Acquisition Front-End |
|---|---|
Use Scenario: Amplifying NTSC/PAL composite video signals before digitization or distribution. IC Role / Device Role / Timing Role: Buffer and gain stage with 0.4% differential gain and 0.1° differential phase at 3.58MHz. Use Value: Preserves color fidelity and sync integrity without requiring post-amplifier correction circuitry. | Use Scenario: Driving the input of 10–12-bit SAR or pipeline ADCs in automated test equipment. IC Role / Device Role / Timing Role: High-speed, low-noise driver with 75ns 0.1% settling time and ±12V swing into 500Ω. Use Value: Enables full-scale conversion accuracy at sampling rates up to 10 MSPS without aperture jitter degradation. |
| Cable Driver for 75Ω Systems | Active Filter Stage |
Use Scenario: Transmitting analog video or RF IF signals over coaxial cables up to 100m. IC Role / Device Role / Timing Role: Output buffer with direct 75Ω series termination capability and C-load stability. Use Value: Eliminates reflections and ringing without external isolation components, reducing BOM count and board area. | Use Scenario: Implementing high-Q, low-distortion bandpass filters in spectrum analyzers or communications receivers. IC Role / Device Role / Timing Role: Gain stage in multiple-feedback or state-variable topologies with THD <0.001% at 1MHz. Use Value: Maintains filter shape accuracy across temperature due to low VOS drift (5μV/°C) and high CMRR (120dB). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT1220CN8#PBF | Unity-gain stable (GBW = 45MHz, SR = 250V/μs); no external compensation pin; higher input bias current (±500nA). | Better for AV = 1–2 applications (e.g., voltage followers); unsuitable for uncompensated AV ≥10 configurations. | Select when unity-gain stability is mandatory and bandwidth <50MHz suffices. |
| LT1221CS8#TRPBF | Stable at AV ≥4 (GBW = 150MHz, SR = 250V/μs); no COMP pin; lower noise (2.1nV/√Hz) but reduced DC gain (50 V/mV min). | Optimized for mid-bandwidth precision gain blocks (AV = 4–10); lacks C-load drive and clamping flexibility. | Select when noise is critical and gain ≥4 is acceptable, but avoid where 500MHz GBW or output clamping is required. |
Compared with LT1220CN8#PBF and LT1221CS8#TRPBF, the LT1222CS8#TRPBF uniquely combines 500MHz GBW, external compensation control, and C-load stability-making it the only option among the three capable of uncompensated AV ≥10 operation with sub-100ns settling and direct coax drive.
Availability
LT1222CS8#TRPBF is available at Aetrix Electronics and suitable for video signal conditioning, data acquisition front-ends, and cable driver applications requiring stable component supply, long-term obsolescence management, and traceable sourcing.
Supply support for LT1222CS8#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 acquired Linear Technology in 2017 and maintains full product support, documentation, and manufacturing continuity for the LT1222 family.
The LT1222CS8#TRPBF belongs to Linear Technology's high-speed precision op amp product line, designed specifically for applications demanding simultaneous wide bandwidth, low noise, and DC accuracy-including medical imaging front-ends, optical receiver TIA stages, and high-fidelity test equipment.
FAQ
What is the maximum capacitive load the LT1222CS8#TRPBF can drive stably?
The LT1222CS8#TRPBF is stable driving up to 10,000pF capacitive loads without external compensation. At this load, large-signal response shows slew-rate limiting to ~4V/μs due to internal short-circuit current limits. For optimal pulse fidelity with coaxial cables, a 75Ω series resistor is recommended at the output, matching the cable's characteristic impedance.
Does the LT1222CS8#TRPBF require external compensation for gain-of-10 operation?
No, the LT1222CS8#TRPBF is unconditionally stable at noise gains of 10 or greater without external compensation. This is confirmed in the datasheet's "Features" and "Applications Information" sections. External compensation (via Pin 5) is optional and used only to reduce bandwidth, improve phase margin at lower gains, or implement output clamping-not required for AV ≥10.
What is the function of Pin 5 (COMP) on the LT1222CS8#TRPBF?
Pin 5 is the internal compensation node of the LT1222CS8#TRPBF. It allows designers to connect an external capacitor to ground to adjust bandwidth, slew rate, and overshoot. It also enables output voltage clamping: connecting back-to-back Schottky diodes between Pin 5 and ground limits the output to approximately ±0.5V, protecting downstream circuitry during overvoltage conditions.
Can the LT1222CS8#TRPBF operate on ±5V supplies?
Yes, the LT1222CS8#TRPBF operates with total supply voltages from ±5V to ±15V (36V max). At ±5V, typical supply current is 8–10.5mA, and output swing remains ≥±3.5V into 500Ω. Gain-bandwidth and slew rate scale downward with supply voltage, but the device retains stability and specified AC performance across this range.
How does the LT1222CS8#TRPBF compare to the LT1221CS8#TRPBF in terms of gain stability?
The LT1222CS8#TRPBF is stable at noise gains ≥10 without compensation, while the LT1221CS8#TRPBF requires minimum noise gain ≥4. This makes the LT1222CS8#TRPBF suitable for higher-gain precision amplifiers (e.g., AV = 100), whereas the LT1221CS8#TRPBF is better suited for moderate-gain, lower-noise applications where 150MHz GBW suffices and external compensation is not needed.
LT1222CS8#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:
- 200V/µs
- Gain Bandwidth Product:
- 500 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 100 nA
- Voltage - Input Offset:
- 100 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
LT1222CS8#TRPBF FAQ
1.How can I place an order for LT1222CS8#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1222CS8#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 LT1222CS8#TRPBF reliable?
The price and inventory of LT1222CS8#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1222CS8#TRPBF is usually 5 days.
3.What payment methods are accepted for LT1222CS8#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1222CS8#TRPBF transactions.
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4.How is shipping managed for LT1222CS8#TRPBF?
LT1222CS8#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1222CS8#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 LT1222CS8#TRPBF?
For technical support, including LT1222CS8#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1222CS8#TRPBF requirements.
6.How does Aetrix verify that LT1222CS8#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT1222CS8#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 LT1222CS8#TRPBF meets industry standards.
7.What is the process for return or replacement of LT1222CS8#TRPBF?
All LT1222CS8#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1222CS8#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 LT1222CS8#TRPBF part is unused and in its original packaging.
Return procedure for LT1222CS8#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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