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Analog Devices Inc. LT1224CS8#PBF
- Part No.:
- LT1224CS8#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LT1224CS8#PBF.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:567
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Product details
Overview
LT1224CS8#PBF from Analog Devices (formerly Linear Technology) is a unity-gain stable, very high speed voltage-feedback operational amplifier optimized for precision data acquisition and wideband signal conditioning. It delivers 45MHz gain-bandwidth, 400V/µs slew rate, 90ns 0.1% settling time for 10V steps, ±12V output swing into 500Ω with ±15V supplies, and drives all capacitive loads without external compensation - making it suitable for DAC current-to-voltage conversion, video line driving, and active filter stages.
For engineers reviewing the LT1224CS8#PBF datasheet, LT1224CS8#PBF pinout, LT1224CS8#PBF application, or LT1224CS8#PBF equivalent, key selection criteria include its guaranteed 2mV max input offset voltage, 7mA supply current at ±15V, stability with unlimited capacitive loading, differential gain/phase performance at 3.58MHz, and SOIC-8 package compatibility with legacy HA2541/AD847 designs after nulling circuit removal.
Technical Context
The LT1224CS8#PBF employs a single-stage bipolar complementary architecture delivering fast settling via internal slew enhancement that balances rising/falling edges in noninverting configurations. Its input stage features 24–40MΩ input resistance and ±12V common-mode range at ±15V supplies, enabling robust operation in DC-coupled wideband systems.
It achieves 50° phase margin in unity-gain and maintains stability across load capacitances up to 10,000pF by sensing the load-induced output pole and applying adaptive compensation at the gain node - eliminating need for external isolation resistors in cable driver applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 45MHz at f = 1MHz - enables stable closed-loop operation up to ~30MHz in gain-of-2 configurations. |
| Slew Rate | 400V/µs (typ), 250V/µs (min) - supports full-scale 10V transitions in <25ns without slewing distortion. |
| Settling Time | 90ns to 0.1% for 10V step - meets timing requirements of 10-bit+ data acquisition systems sampling ≥10MSps. |
| Input Offset Voltage | 2mV max (C-grade, TA = 25°C) - ensures ≤20mV error in unity-gain buffer with 10V input. |
| Output Swing | ±12.0V min into 500Ω with ±15V supplies - delivers rail-to-rail usable dynamic range for ±12V signal chains. |
| Supply Current | 7–9mA at ±15V - enables high-speed performance without excessive thermal load in SOIC-8 packages. |
| Capacitive Load Drive | Stable with unlimited capacitive loads - eliminates series isolation resistor in coaxial cable drivers and ADC input buffers. |
Pinout & Package
LT1224CS8#PBF is housed in an 8-lead plastic SOIC (S8) package with standard JEDEC MS-012AC dimensions (0.150" width, 1.27mm pitch). Thermal resistance θJA = 150°C/W enables operation up to +70°C ambient without forced airflow.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | NULL | Offset null adjustment terminal - requires external 5kΩ potentiometer between Pins 1 and 5 for precision trimming. |
| 2 | –IN | Inverting input - high-impedance node (2pF capacitance); sensitive to stray coupling; requires matched source impedance for DC accuracy. |
| 3 | +IN | Noninverting input - same impedance and noise specs as Pin 2; common-mode range extends to ±12V with ±15V supplies. |
| 4 | V– | Negative supply rail - must be bypassed with 0.01–0.1µF ceramic capacitor close to pin for high-frequency stability. |
| 5 | NULL | Second offset null terminal - connected to wiper of 5kΩ potentiometer (other ends to Pins 1 and 4) for VOS correction. |
| 6 | OUT | Amplifier output - capable of sourcing/sinking ≥24mA; drives 150Ω loads to ±3V on ±5V supplies or 500Ω to ±12V on ±15V supplies. |
| 7 | V+ | Positive supply rail - requires low-ESR 1–10µF tantalum bypass for high-current transient response. |
| 8 | NC | No connect - internally unused; must remain unconnected per datasheet to avoid parametric shift. |
Key Features
| Feature | Design Value |
|---|---|
| Unity-gain stable architecture | Guaranteed stable at AV = +1 without external compensation - simplifies design of buffers and integrators. |
| Capacitive load immunity | Operates stably with any capacitive load (0–10,000pF) - removes need for series output resistors in cable drivers. |
| Balanced slew enhancement | Equalized rising/falling edge rates in noninverting mode - eliminates asymmetry in pulse response critical for video and instrumentation. |
| High DC gain at bandwidth | 7V/mV large-signal voltage gain into 500Ω - provides >130dB open-loop gain for precision closed-loop accuracy. |
| Wide supply range | Operates from ±2.5V to ±15V - supports both low-voltage portable systems (±5V) and industrial ±12V signal chains. |
Applications
| Video Line Driver | DAC Current-to-Voltage Converter |
|---|---|
Use Scenario: Driving 75Ω coaxial video cables in broadcast equipment with minimal group delay and differential gain/phase error. IC Role / Device Role / Timing Role: Final-stage buffer amplifier providing gain, drive strength, and impedance matching. Use Value: Delivers <1% differential gain error and <2.4° differential phase at 3.58MHz - meets NTSC/PAL broadcast fidelity requirements. |
Use Scenario: Converting 2mA full-scale current output from DAC-08 to 0–10V voltage with sub-140ns settling. IC Role / Device Role / Timing Role: High-speed transimpedance amplifier with pole-zero compensation for DAC output capacitance. Use Value: Achieves 140ns 1LSB settling for 0↔10V transitions - enables 10-bit accuracy in ≥7MSps data acquisition systems. |
| Active Low-Pass Filter | Wideband Instrumentation Amplifier Stage |
Use Scenario: Implementing 430kHz 2nd-order Butterworth filter in medical imaging front-ends requiring flat group delay. IC Role / Device Role / Timing Role: Gain stage in Sallen-Key topology with precise component ratio control. Use Value: Maintains 0.1dB passband ripple and linear phase response up to 300kHz due to 45MHz GBW and low distortion. |
Use Scenario: Building two-op-amp instrumentation amplifier for sensor signal conditioning with high CMRR and bandwidth. IC Role / Device Role / Timing Role: Output difference amplifier with gain-setting resistors and common-mode rejection tuning. Use Value: Enables ≥86dB CMRR at DC and >60dB at 100kHz while preserving 45MHz small-signal bandwidth for fast transients. |
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 (1.5mV typ), no built-in capacitive load immunity - requires external compensation for >100pF loads. | Preferred in cost-sensitive audio preamps where load capacitance is fixed and known; not recommended for variable-cable-length video drivers. | Select AD847JRZ only when layout allows strict control of output node capacitance and lower power (5.5mA) is prioritized over universal stability. |
| LM6361IM/NOPB | Higher supply current (12mA), lower slew rate (300V/µs), wider input voltage range (±16V), but unstable with >500pF loads without isolation resistor. | Suitable for high-voltage industrial signal conditioning where output drive >±13V is required, but unsuitable for direct coaxial cable driving. | Choose LM6361IM/NOPB when operating beyond ±15V supplies is mandatory and external compensation can be accommodated in PCB layout. |
Compared with LT1224CS8#PBF, AD847JRZ trades capacitive load flexibility for slightly higher bandwidth and lower quiescent current, while LM6361IM/NOPB extends supply voltage range at the cost of stability headroom and increased power - making LT1224CS8#PBF the optimal choice for unmodified drop-in replacement in HA2541/EL2020 designs requiring guaranteed stability with unknown or variable capacitive loads.
Availability
LT1224CS8#PBF is available at Aetrix Electronics and suitable for video line driving, DAC current-to-voltage conversion, active filtering, instrumentation amplifier stages, and wideband amplification requiring stable component supply across industrial, medical, and broadcast design cycles.
Supply support for LT1224CS8#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, Inc. (acquired Linear Technology in 2017) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors for precision instrumentation, communications, and industrial applications.
The LT1224CS8#PBF belongs to Linear Technology's high-speed precision op-amp family, designed specifically for data acquisition systems, video signal processing, and wideband instrumentation where speed, DC accuracy, and capacitive load drive coexist.
FAQ
What is the maximum capacitive load the LT1224CS8#PBF can drive without oscillation?
The LT1224CS8#PBF is explicitly characterized and guaranteed stable with all capacitive loads, including up to 10,000pF. This is achieved through internal compensation that senses the load-induced pole and adapts feedback - eliminating need for external isolation resistors in cable driver or ADC buffer applications. No external components are required for stability regardless of load capacitance.
Does the LT1224CS8#PBF require offset nulling in precision applications?
Yes - the LT1224CS8#PBF includes dedicated NULL pins (1 and 5) for external offset voltage trimming using a 5kΩ potentiometer. While its maximum input offset voltage is specified at 2mV (C-grade), nulling reduces residual error to <0.5mV, which is essential for 12-bit+ DC-coupled measurement systems where 0.01% gain accuracy is required.
Can the LT1224CS8#PBF operate from a single +5V supply?
No - the LT1224CS8#PBF is a dual-supply operational amplifier requiring symmetric positive and negative rails (±2.5V to ±15V). It does not support true single-supply operation because its input common-mode range does not extend to the negative rail, and output swing is specified relative to both V+ and V–. For single-supply designs, consider rail-to-rail input/output amplifiers like the LTC6228.
What is the thermal limitation of the LT1224CS8#PBF in SOIC-8 package?
The LT1224CS8#PBF in SOIC-8 has a junction-to-ambient thermal resistance (θJA) of 150°C/W. With 9mA max supply current at ±15V (270mW total dissipation), junction temperature rise is 40.5°C above ambient. At 70°C ambient, TJ reaches 110.5°C - well below the 150°C absolute maximum, confirming safe operation without heatsinking in typical industrial environments.
Is the LT1224CS8#PBF pin-compatible with the HA2541 or AD847?
The LT1224CS8#PBF shares identical SOIC-8 pinout with HA2541 and AD847, but requires removal of their external nulling networks due to integrated null terminals. The datasheet confirms direct insertion into existing HA2541/AD847 layouts provided nulling circuitry is omitted - making it a functional and mechanical drop-in replacement for those legacy high-speed op-amps.
LT1224CS8#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:
- 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#PBF FAQ
1.How can I place an order for LT1224CS8#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1224CS8#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 LT1224CS8#PBF reliable?
The price and inventory of LT1224CS8#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1224CS8#PBF is usually 5 days.
3.What payment methods are accepted for LT1224CS8#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1224CS8#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1224CS8#PBF?
LT1224CS8#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1224CS8#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 LT1224CS8#PBF?
For technical support, including LT1224CS8#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1224CS8#PBF requirements.
6.How does Aetrix verify that LT1224CS8#PBF is sourced from the original manufacturer or authorized distributors?
All LT1224CS8#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 LT1224CS8#PBF meets industry standards.
7.What is the process for return or replacement of LT1224CS8#PBF?
All LT1224CS8#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1224CS8#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 LT1224CS8#PBF part is unused and in its original packaging.
Return procedure for LT1224CS8#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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