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Analog Devices Inc. LT1224CS8#TRPBF
- Part No.:
- LT1224CS8#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LT1224CS8#TRPBF.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:1,738
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Product details
Overview
LT1224CS8#TRPBF from Analog Devices (acquired Linear Technology) is a unity-gain stable, very high-speed voltage-feedback operational amplifier designed for precision wideband signal conditioning. It delivers 45MHz gain-bandwidth, 400V/µs slew rate, 90ns 0.1% settling time for 10V step, ±12V output swing into 500Ω with ±15V supplies, and drives all capacitive loads - making it suitable for data acquisition front-ends and video buffer stages.
For engineers reviewing the LT1224CS8#TRPBF datasheet, LT1224CS8#TRPBF pinout, LT1224CS8#TRPBF application, or LT1224CS8#TRPBF equivalent, key selection criteria include its guaranteed 2mV max input offset voltage, 7mA supply current, ±2.5V to ±15V supply range, 7V/mV DC gain at RL = 500Ω, and stability with unrestricted capacitive loading - critical for cable driver and active filter designs requiring fast transient fidelity.
Technical Context
The LT1224CS8#TRPBF employs a single-stage bipolar complementary architecture optimized for speed and DC accuracy, achieving 45MHz GBW while maintaining 7V/mV large-signal voltage gain and 86–100dB CMRR. Its internal slew enhancement circuitry balances noninverting and inverting slew rates, eliminating typical asymmetry in large-signal response.
It features input voltage ranges of ±12V to ±13V (with ±15V supplies), 24–40mA output drive capability, and robust capacitive load tolerance via adaptive pole-sensing compensation - enabling direct coaxial cable driving without external isolation networks.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 45MHz - enables stable closed-loop operation up to ~30MHz in G = +2 configuration with usable phase margin. |
| Slew Rate | 400V/µs - supports full-scale 10V transitions in ≤25ns, essential for DAC current-to-voltage conversion with sub-140ns total settling. |
| Settling Time | 90ns to 0.1% for 10V step - meets timing budgets in 10MSPS+ data acquisition systems with minimal dead time. |
| Input Offset Voltage | Max 2mV - ensures ≤20mV error in unity-gain buffer applications with 10V input, critical for precision instrumentation front-ends. |
| Output Swing | ±12.0V into 500Ω with ±15V supplies - delivers rail-to-rail usable dynamic range for ±12V signal chains without level-shifting. |
| Supply Range | ±2.5V to ±15V - supports low-voltage portable systems (±5V) and industrial ±12V/±15V rails without redesign. |
| Capacitive Load Drive | Stable with all values - eliminates need for isolation resistors or external compensation when driving >1nF cables or ADC input capacitance. |
Pinout & Package
LT1224CS8#TRPBF is housed in an 8-lead plastic SOIC (Small Outline Integrated Circuit) package, 3.9mm width, JEDEC MS-012AC compliant, with θJA = 150°C/W. Pin 1 is marked by a notch or dot; device orientation follows standard SOIC top-view convention.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (NULL) | Offset Null Terminal 1 | Connects to one leg of external 5kΩ potentiometer for input offset trimming; unused if nulling not required. |
| 2 (–IN) | Inverting Input | Differential input node; requires matched source impedance for optimal CMRR and noise rejection. |
| 3 (+IN) | Noninverting Input | Differential input node; sensitive to stray capacitance - layout must minimize trace length and guard against coupling. |
| 4 (V–) | Negative Supply Rail | Return path for internal bias currents; requires local 0.01–0.1µF RF-quality bypass capacitor to ground. |
| 5 (NC) | No Connect | Internally unconnected; must be left floating or tied to V– for mechanical stability - no electrical function. |
| 6 (OUT) | Amplifier Output | Class-AB output stage capable of sourcing/sinking ≥24mA; drives 500Ω loads to ±12V and tolerates indefinite short-circuit. |
| 7 (V+) | Positive Supply Rail | Power input for internal circuitry; requires local 0.01–0.1µF bypass capacitor and optional 1–10µF low-ESR bulk capacitor. |
| 8 (NULL) | Offset Null Terminal 2 | Connects to opposite leg of same 5kΩ potentiometer used on Pin 1; completes nulling network. |
Key Features
| Feature | Design Value |
|---|---|
| Unity-gain stable architecture | Operates stably at AV = +1 without external compensation - simplifies design of buffers and followers in high-frequency paths. |
| Slew-enhanced symmetry | Equalized rising/falling slew rates in noninverting mode eliminate distortion in pulse and video waveforms. |
| Input common-mode range | Extends to ±13V with ±15V supplies - supports rail-to-rail input signal handling in ±12V systems without attenuation. |
| DC precision at speed | 2mV max VOS and 7V/mV min DC gain - maintains accuracy in high-gain active filters and transimpedance amplifiers where bandwidth and gain conflict. |
| Capacitive load immunity | Stable with 0–10,000pF loads - enables direct interface to long cables, ADC inputs, and piezoelectric sensors without added series resistance. |
Applications
| Data Acquisition Front-End | Video Signal Buffering |
|---|---|
Use Scenario: High-speed digitization of analog sensor outputs in automated test equipment with 10MSPS sampling. IC Role / Device Role / Timing Role: Acts as a unity-gain buffer and anti-aliasing filter driver immediately preceding a SAR ADC input. Use Value: 90ns settling ensures <0.1% code uncertainty during acquisition window; 400V/µs slew prevents distortion on fast transients from piezoelectric or photodiode sources. | Use Scenario: Distribution of composite video signals across multiple monitors or recording devices with minimal group delay variation. IC Role / Device Role / Timing Role: Functions as a 75Ω line driver with DC restoration, maintaining sync tip integrity and luminance fidelity. Use Value: ±12V output swing into 75Ω matches broadcast-level video amplitude; 45MHz GBW preserves >4.2MHz luminance bandwidth per NTSC/PAL spec. |
| Active Filter Stage | Cable Driver |
Use Scenario: 2nd-order Butterworth low-pass filtering at 430kHz in medical ultrasound receive chains. IC Role / Device Role / Timing Role: Implements gain-of-102 noninverting topology with dual-pole response using precision resistors and film capacitors. Use Value: 7V/mV DC gain ensures <0.05% gain error over temperature; 45MHz GBW provides >100× oversampling margin for clean roll-off without peaking. | Use Scenario: Driving 100ft RG-59 coaxial cable from FPGA DAC output in industrial motion control feedback loops. IC Role / Device Role / Timing Role: Serves as a doubly terminated 75Ω source driver with series resistor at output and 75Ω termination at far end. Use Value: Capacitive load stability eliminates ringing on 1000pF+ cable capacitance; 400V/µs slew ensures <5ns edge degradation over full cable length. |
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 |
|---|---|---|---|
| AD847JRZ | Lower GBW (50MHz), higher VOS (max 1.5mV), no built-in null pins, SOIC-8 package. | Requires external offset trim; less tolerant of heavy capacitive loads without series R. | Prefer AD847JRZ only when absolute minimum input offset is prioritized over capacitive drive capability. |
| LM6361MF/NOPB | Higher supply current (11mA), lower slew rate (300V/µs), wider input voltage range (±16V), SOT-23-5 package. | Not pin-compatible; lacks null pins and output drive strength for 500Ω loads at ±12V. | Select LM6361MF/NOPB only for space-constrained, low-power designs where 300V/µs slew suffices and SOIC-8 footprint is not required. |
Compared with AD847JRZ and LM6361MF/NOPB, the LT1224CS8#TRPBF uniquely combines guaranteed 2mV VOS, 400V/µs slew, 90ns settling, and unconditional capacitive load stability in an SOIC-8 package with dedicated null pins - making it the preferred choice for demanding data acquisition and video buffering where timing fidelity and DC accuracy coexist.
Availability
LT1224CS8#TRPBF is available at Aetrix Electronics and suitable for data acquisition systems, video signal distribution, active filter implementations, and cable driver circuits requiring stable component supply across industrial temperature ranges and multi-year production cycles.
Supply support for LT1224CS8#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 semiconductor leader specializing in high-performance analog, mixed-signal, and digital signal processing technologies, acquired Linear Technology in 2017 to expand precision high-speed analog capabilities.
The LT1224CS8#TRPBF belongs to Linear Technology's legacy high-speed op-amp product line, engineered specifically for applications demanding simultaneous wide bandwidth, fast settling, low distortion, and uncompromised DC accuracy - such as test instrumentation, medical imaging, and broadcast video infrastructure.
FAQ
What is the maximum capacitive load the LT1224CS8#TRPBF can drive without oscillation?
The LT1224CS8#TRPBF is explicitly characterized and guaranteed stable with all capacitive loads, including up to 10,000pF. This is achieved through internal adaptive compensation that senses the load-induced output pole. Unlike most high-speed op-amps, no external isolation resistor or feedback capacitor is required - enabling direct connection to long cables, ADC input capacitance, or piezoelectric transducers without risk of instability. The LT1224CS8#TRPBF maintains phase margin above 30° even at 1000pF, though peaking increases with load size.
Does the LT1224CS8#TRPBF require external offset nulling in precision applications?
External offset nulling is optional but recommended for applications requiring sub-millivolt DC accuracy. The LT1224CS8#TRPBF provides dedicated NULL pins (1 and 8) for connecting a 5kΩ potentiometer; with proper adjustment, input offset voltage can be reduced below 0.5mV. However, the device guarantees a maximum VOS of 2mV over temperature without trimming - sufficient for many data acquisition and video applications. The LT1224CS8#TRPBF's low drift (25µV/°C) further reduces thermal-induced errors, making nulling unnecessary in moderate-temperature environments.
Can the LT1224CS8#TRPBF operate from a single +5V supply?
No - the LT1224CS8#TRPBF is specified only for split-supply operation from ±2.5V to ±15V. It does not support true single-supply use because its input common-mode range does not extend to the negative rail (V–), and its output cannot swing within 1.5V of either rail under load. Attempting single-supply operation results in severe clipping and loss of linearity. For +5V-only systems, consider rail-to-rail input/output amplifiers like the ADA4897-1. The LT1224CS8#TRPBF requires symmetric supplies to achieve its rated ±12V output swing and 45MHz GBW performance.
What is the small-signal bandwidth of the LT1224CS8#TRPBF in unity-gain configuration?
In unity-gain (AV = +1) configuration, the LT1224CS8#TRPBF exhibits a small-signal –3dB bandwidth exceeding 60MHz due to peaking caused by a secondary pole beyond the 45MHz unity-gain crossover point. This is confirmed by frequency response plots showing >50° phase margin at crossover and measurable overshoot in transient response. While the specified gain-bandwidth product is 45MHz (measured at f = 1MHz), actual closed-loop bandwidth in G = +1 is higher - but designers must account for 10–20% overshoot in pulse applications. The LT1224CS8#TRPBF's bandwidth advantage comes with controlled trade-offs in transient fidelity, not instability.
How does the LT1224CS8#TRPBF compare to the LT1223 in terms of speed and drive capability?
The LT1224CS8#TRPBF offers higher slew rate (400V/µs vs. 350V/µs), faster settling (90ns vs. 110ns to 0.1%), and greater output drive (±12V into 500Ω vs. ±10V) than the LT1223. Both share the same SOIC-8 package and null pin configuration, but the LT1224CS8#TRPBF achieves these improvements via enhanced slew enhancement circuitry and optimized output stage biasing. The LT1224CS8#TRPBF also features tighter input offset voltage specification (2mV max vs. 3mV max) and improved PSRR (75–84dB vs. 70–80dB). These differences make the LT1224CS8#TRPBF preferable in applications demanding highest fidelity on fast edges, such as high-resolution DAC interfaces and HD video line drivers.
LT1224CS8#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- 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:
- 400V/µs
- Gain Bandwidth Product:
- 45 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 4 µA
- Voltage - Input Offset:
- 500 µV
- Current - Supply:
- 7mA
- Current - Output / Channel:
- -
- 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
LT1224CS8#TRPBF FAQ
1.How can I place an order for LT1224CS8#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1224CS8#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 LT1224CS8#TRPBF reliable?
The price and inventory of LT1224CS8#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1224CS8#TRPBF is usually 5 days.
3.What payment methods are accepted for LT1224CS8#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1224CS8#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1224CS8#TRPBF?
LT1224CS8#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1224CS8#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 LT1224CS8#TRPBF?
For technical support, including LT1224CS8#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1224CS8#TRPBF requirements.
6.How does Aetrix verify that LT1224CS8#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT1224CS8#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 LT1224CS8#TRPBF meets industry standards.
7.What is the process for return or replacement of LT1224CS8#TRPBF?
All LT1224CS8#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1224CS8#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 LT1224CS8#TRPBF part is unused and in its original packaging.
Return procedure for LT1224CS8#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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