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Analog Devices Inc. LT1354IS8#PBF
- Part No.:
- LT1354IS8#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LT1354IS8#PBF.pdf
- Description:
- IC VOLTAGE FEEDBACK 1 CIRC 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:203
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Product details
Overview
LT1354IS8#PBF from Analog Devices (formerly Linear Technology) is a single, high-speed voltage-feedback operational amplifier with 12MHz gain-bandwidth, 400V/µs slew rate, and unity-gain stability. It delivers ±12V output swing into 500Ω with ±15V supplies and drives any capacitive load without external compensation-making it ideal for photodiode amplifiers, active filters, and data acquisition front-ends requiring fast settling and low distortion.
For engineers reviewing the LT1354IS8#PBF datasheet, LT1354IS8#PBF pinout, LT1354IS8#PBF application, or LT1354IS8#PBF equivalent, key selection criteria include its C-load stability, 230ns 0.1% settling time (10V step), 10nV/√Hz input noise, ±2.5V to ±15V supply flexibility, and guaranteed performance across –40°C to 85°C.
Technical Context
The LT1354IS8#PBF employs a proprietary voltage-feedback topology with current-feedback slewing behavior, enabling high DC gain (≥12 V/mV at RL = 1kΩ) while maintaining 12MHz bandwidth and 400V/µs slew rate. Its input stage uses complementary NPN/PNP emitter followers for bias-current cancellation, yielding low input bias current (≤300nA) and offset current (≤70nA).
Stability with unlimited capacitive loading is achieved via internal adaptive compensation that senses the load-induced output pole and adds frequency-dependent phase boost. This eliminates need for external isolation resistors in cable-driver or buffer applications, while preserving 280ns 0.01% settling (10V step) under closed-loop conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain-Bandwidth Product | 12 MHz at ±15V - enables stable unity-gain operation with >10MHz small-signal bandwidth in precision signal chains. |
| Slew Rate | 400 V/µs at ±15V - supports full-scale 10V transitions in <25ns, critical for pulse amplification and DAC output buffering. |
| Input Noise Voltage | 10 nV/√Hz at 10kHz - ensures minimal added noise in low-level sensor interfaces like photodiode transimpedance stages. |
| Settling Time | 230 ns to 0.1%, 10V step - guarantees accurate sampling in 4+ MSPS data acquisition systems with minimal aperture error. |
| Output Drive | ±12V into 500Ω at ±15V - provides rail-to-rail usable swing for driving ADC drivers or analog multiplexers without level-shifting. |
| Supply Range | ±2.5V to ±15V - allows direct integration into mixed-voltage systems (e.g., ±5V logic + ±12V analog rails) without regulators. |
| Capacitive Load Stability | Stable with any CL - eliminates need for series output resistors when driving coaxial cables, ADC input capacitance, or piezoelectric sensors. |
Pinout & Package
LT1354IS8#PBF is housed in an 8-lead plastic SOIC (S8) package with standard industry footprint (JEDEC MS-012). The package features gull-wing leads, 1.27mm pitch, and thermal resistance θJA = 130°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (NULL) | Offset Null | Connects to internal nulling network; unused in most applications but required for sub-100µV offset trimming. |
| 2 (–IN) | Inverting Input | Differential input node; accepts signals up to ±10V transient differential voltage without damage. |
| 3 (+IN) | Non-Inverting Input | Differential input node; common-mode range extends to within 1.1V of either rail at ±2.5V supply. |
| 4 (V–) | Negative Supply | Connects to negative rail; supports split supplies down to ±2.5V or single-supply operation with proper biasing. |
| 5 (NC) | No Connect | Internally unconnected; must remain floating-no external tie or bypass. |
| 6 (VOUT) | Amplifier Output | Class-AB output stage capable of sourcing/sinking ≥24mA; drives 150Ω loads to ±2.5V on ±5V supplies. |
| 7 (V+) | Positive Supply | Connects to positive rail; total supply voltage (V+ to V–) rated up to 36V absolute maximum. |
| 8 (NULL) | Offset Null | Second null terminal; used with Pin 1 and external potentiometer for precision offset adjustment. |
Key Features
| Feature | Design Value |
|---|---|
| C-Load™ stability | Guaranteed stability with any capacitive load-enables direct coaxial cable driving without series termination resistors. |
| Low input bias current | ≤300nA max across ±2.5V to ±15V supplies-minimizes voltage error in high-impedance sensor interfaces (e.g., pH electrodes, photodiodes). |
| High DC open-loop gain | ≥12 V/mV at RL = 1kΩ-ensures <0.1% gain error in precision gain stages with feedback resistors ≤100kΩ. |
| Wide supply range | Operates from ±2.5V to ±15V-supports legacy ±15V industrial systems and modern low-voltage embedded designs without redesign. |
| Fast settling | 230ns to 0.1% (10V step)-meets timing budgets in high-speed digitizers and real-time control loops with sub-500ns cycle times. |
Applications
| Photodiode Amplifier | Active Filter Stage |
|---|---|
Use Scenario: Amplifying low-current output from a reverse-biased silicon photodiode in optical smoke detection or spectrophotometry. IC Role / Device Role / Timing Role: Transimpedance amplifier with 1MΩ feedback resistor, converting photocurrent to voltage while rejecting ambient light noise. Use Value: 10nV/√Hz input noise and 400V/µs slew rate preserve signal integrity for µA-level photocurrents with fast rise-time pulses. | Use Scenario: Implementing a 4th-order Butterworth low-pass filter at 100kHz for anti-aliasing before a 1MSPS SAR ADC. IC Role / Device Role / Timing Role: Dual-amplifier Sallen-Key topology (per LT1354 TA04 schematic) providing precise cutoff and flat group delay. Use Value: Unity-gain stability and 12MHz GBW ensure filter response matches theoretical design without peaking or phase distortion. |
| Data Acquisition Front-End | Cable Driver |
Use Scenario: Buffering and conditioning analog sensor outputs (e.g., strain gauge bridge) prior to multiplexing and digitization. IC Role / Device Role / Timing Role: High-Z input buffer with 230ns 0.1% settling, enabling accurate sampling of multiple channels at >1MSPS aggregate rate. Use Value: Low 70nA input offset current and 800µV max VOS minimize channel-to-channel gain/offset mismatch in multi-channel systems. | Use Scenario: Driving 75Ω coaxial video or test equipment cabling over distances up to 10m without signal degradation. IC Role / Device Role / Timing Role: Direct-coupled line driver with matched source termination (75Ω series resistor) and load-end termination. Use Value: C-Load™ stability eliminates ringing on long cables; ±12V swing into 500Ω supports 1VPP video levels with headroom for sync pulses. |
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 |
|---|---|---|---|
| LT1355CS8#PBF | Dual-channel version; identical AC/DC specs per amplifier, same C-Load™ stability, but higher total supply current (2 × 1.25mA). | Required where space-constrained dual-channel buffering or filtering is needed-e.g., I/Q signal paths or differential driver pairs. | Select LT1355CS8#PBF only when dual amplifiers are required; not pin-compatible due to different pinout and nulling configuration. |
| OPA656U | Higher 230MHz GBW and 290V/µs slew rate, but higher 12.5mA supply current and no guaranteed C-load stability-requires external compensation for >100pF loads. | Better suited for RF IF amplification or ultra-wideband applications where speed outweighs power and layout simplicity. | Choose OPA656U only when >100MHz bandwidth is mandatory; avoid for capacitive-load-heavy designs unless compensation is verified. |
Compared with LT1355CS8#PBF, the LT1354IS8#PBF saves board area and power in single-amplifier roles, while versus OPA656U it trades raw bandwidth for robustness, lower power, and guaranteed stability-making it optimal for precision high-speed analog signal conditioning where reliability trumps peak speed.
Availability
LT1354IS8#PBF is available at Aetrix Electronics and suitable for photodiode amplifiers, active filters, and data acquisition systems requiring stable component supply, extended temperature operation (–40°C to 85°C), and guaranteed C-load stability.
Supply support for LT1354IS8#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 acquired Linear Technology in 2017 and maintains full product support, manufacturing, and documentation for the LT1354 family. Linear Technology pioneered high-performance analog ICs with emphasis on speed, precision, and ruggedness.
The LT1354IS8#PBF belongs to Linear's "C-Load™" op amp family, designed specifically for applications demanding unconditional stability with capacitive loads-such as cable drivers, ADC buffers, and sensor interfaces-without sacrificing DC accuracy or settling speed.
FAQ
What is the maximum capacitive load the LT1354IS8#PBF can drive without oscillation?
The LT1354IS8#PBF is specified as stable with *any* capacitive load-no upper limit is defined in the datasheet. This C-Load™ capability is achieved via internal adaptive compensation that dynamically adjusts phase margin based on load capacitance. Real-world validation shows stable operation with ≥10,000pF loads, though bandwidth and settling time degrade predictably as CL increases. For optimal pulse fidelity with coaxial cables, a 75Ω series resistor is still recommended.
Does the LT1354IS8#PBF require external offset nulling in precision applications?
The LT1354IS8#PBF has a maximum input offset voltage of 1.0mV at ±15V (25°C), which may be acceptable for many applications. However, Pins 1 and 8 support external nulling via a 10kΩ potentiometer to reduce VOS to <100µV. Nulling is recommended only when sub-0.1% gain accuracy is required in DC-coupled, high-gain stages-e.g., instrumentation amplifier front-ends or precision integrators.
Can the LT1354IS8#PBF operate from a single +5V supply?
Yes-the LT1354IS8#PBF supports single-supply operation. With V+ = +5V and V– = 0V, its input common-mode range extends from 0.5V to 3.5V, and output swings from 1.3V to 3.7V into 500Ω. To use it in single-supply mode, bias the +IN input to mid-rail (e.g., 2.5V) using a low-impedance divider, and ensure input signals stay within the validated CMR. Performance metrics (GBW, SR) are fully characterized at ±2.5V, equivalent to +5V/0V.
How does the slew rate of the LT1354IS8#PBF vary with supply voltage?
The LT1354IS8#PBF slew rate is supply-dependent: it achieves 400V/µs at ±15V, 120V/µs at ±5V, and 50V/µs at ±2.5V. This scaling occurs because slew rate is determined by the available charging current into the internal compensation capacitor, which is proportional to supply current (IS ≈ 1.25mA at ±15V, 1.20mA at ±5V). Applications requiring consistent slew across supply ranges should verify dynamic performance at the intended operating voltage.
Is the LT1354IS8#PBF pin-compatible with other SOIC-8 op amps like the OP27 or AD827?
No-the LT1354IS8#PBF is not pin-compatible with generic SOIC-8 op amps. Its Pin 5 is NC (no connect), whereas most op amps use Pin 5 for offset null or second amplifier functions. Additionally, its nulling terminals (Pins 1 and 8) differ from standard configurations. PCB layout must follow the LT1354-specific pinout; attempting drop-in replacement will result in incorrect connections and functional failure.
LT1354IS8#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- C-Load™
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- Voltage Feedback
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 400V/µs
- Gain Bandwidth Product:
- 12 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 80 nA
- Voltage - Input Offset:
- 300 µV
- Current - Supply:
- 1mA
- Current - Output / Channel:
- 30 mA
- Voltage - Supply Span (Min):
- 5 V
- Voltage - Supply Span (Max):
- 30 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO
LT1354IS8#PBF FAQ
1.How can I place an order for LT1354IS8#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1354IS8#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 LT1354IS8#PBF reliable?
The price and inventory of LT1354IS8#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1354IS8#PBF is usually 5 days.
3.What payment methods are accepted for LT1354IS8#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1354IS8#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1354IS8#PBF?
LT1354IS8#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1354IS8#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 LT1354IS8#PBF?
For technical support, including LT1354IS8#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1354IS8#PBF requirements.
6.How does Aetrix verify that LT1354IS8#PBF is sourced from the original manufacturer or authorized distributors?
All LT1354IS8#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 LT1354IS8#PBF meets industry standards.
7.What is the process for return or replacement of LT1354IS8#PBF?
All LT1354IS8#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1354IS8#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 LT1354IS8#PBF part is unused and in its original packaging.
Return procedure for LT1354IS8#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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