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Analog Devices Inc. LT1355CS8#PBF
- Part No.:
- LT1355CS8#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LT1355CS8#PBF.pdf
- Description:
- IC VOLTAGE FEEDBACK 2 CIRC 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:286
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Product details
Overview
LT1355CS8#PBF from Analog Devices (formerly Linear Technology) is a dual high-speed voltage-feedback operational amplifier with 12MHz gain bandwidth, 400V/µs slew rate, and 1.25mA maximum supply current per amplifier. It features C-Load™ stability with any capacitive load, 10nV/√Hz input noise, and ±12V output swing into 500Ω on ±15V supplies - ideal for precision data acquisition and active filter design.
For engineers reviewing the LT1355CS8#PBF datasheet, LT1355CS8#PBF pinout, LT1355CS8#PBF application, or LT1355CS8#PBF equivalent, key selection criteria include unity-gain stability, capacitive-load drive capability, settling time to 0.01% (280ns), input offset voltage ≤1.0mV at 25°C, and SO-8 package compatibility with industrial temperature range (0°C to 70°C).
Technical Context
The LT1355CS8#PBF employs a unique voltage-feedback topology with matched high-impedance inputs and current-feedback-like slewing performance. Its single-stage design delivers fast settling (230ns to 0.1%, 10V step) and excellent phase margin across supply voltages (±2.5V to ±15V).
It integrates complementary NPN/PNP input buffering and an 800Ω input resistor that sets bandwidth via gain-node capacitance. Slew rate scales with input differential voltage, yielding highest performance in low-gain configurations (e.g., AV = –1 or unity gain).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Bandwidth Product | 12MHz at ±15V - supports stable closed-loop operation up to 12MHz with AV ≥ 1. |
| Slew Rate | 400V/µs at ±15V - enables full-scale 10V transitions in ≤25ns, critical for fast pulse amplification. |
| Input Noise Voltage | 10nV/√Hz at 10kHz - preserves signal integrity in low-level sensor and photodiode amplifier stages. |
| Input Offset Voltage | ≤1.0mV (max, 25°C) - ensures DC accuracy in precision instrumentation and active filter DC biasing. |
| Supply Current per Amp | 1.25mA max at ±15V - balances speed and power efficiency for dual-channel systems with thermal constraints. |
| Output Swing | ±12V into 500Ω on ±15V supplies - drives standard analog interface loads without external boost circuitry. |
| Capacitive Load Stability | Stable with any CL - eliminates need for isolation resistors when driving coaxial cables or ADC input capacitance. |
Pinout & Package
LT1355CS8#PBF is housed in an 8-lead plastic SO (Small Outline) package (S8), 150 mil width, RoHS-compliant lead-free finish. Thermal resistance θJA = 190°C/W enables operation up to 70°C ambient without forced cooling in typical PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (–IN A) | Inverting input of Amplifier A | High-impedance node accepting feedback network; polarity defines inverting configuration. |
| 2 (+IN A) | Non-inverting input of Amplifier A | High-impedance node for reference or signal injection; balanced source resistance recommended for DC accuracy. |
| 3 (V+) | Positive supply rail | Accepts +2.5V to +15V; powers both amplifiers and internal bias circuitry. |
| 4 (OUT A) | Output of Amplifier A | Capable of ±12V swing into 500Ω; C-Load™ architecture prevents oscillation with direct capacitive loading. |
| 5 (OUT B) | Output of Amplifier B | Independent output with identical drive strength and settling behavior as OUT A. |
| 6 (V–) | Negative supply rail | Accepts –2.5V to –15V; symmetrical to V+ for bipolar operation or ground-referenced single-supply use. |
| 7 (–IN B) | Inverting input of Amplifier B | Functionally identical to Pin 1; supports dual-channel independent gain configurations. |
| 8 (+IN B) | Non-inverting input of Amplifier B | Functionally identical to Pin 2; enables dual instrumentation or differential pair implementations. |
Key Features
| Feature | Design Value |
|---|---|
| C-Load™ capacitive-load stability | Eliminates need for output series resistors when driving >1000pF loads - simplifies layout in ADC buffer and video line-driver applications. |
| Unity-gain stable operation | Guaranteed stable at AV = 1 without external compensation - reduces BOM count and design iteration for gain-of-one buffers. |
| Low input bias current (≤300nA) | Minimizes voltage error across high-impedance sensor sources (e.g., pH electrodes, piezoelectric transducers). |
| Fast 0.01% settling (280ns) | Meets timing requirements for 1MSPS data acquisition systems using dual-channel simultaneous sampling. |
| Wide supply range (±2.5V to ±15V) | Supports both low-voltage portable systems and high-dynamic-range industrial signal chains without redesign. |
Applications
| Photodiode Amplifier | Active Filter Stage |
|---|---|
|
Use Scenario: Converting weak current from a silicon photodiode into a stable voltage signal for optical sensing. IC Role / Device Role / Timing Role: Transimpedance amplifier (TIA) with low input noise and high DC gain. Use Value: 10nV/√Hz input noise and ≤1.0mV VOS preserve SNR in sub-nA photocurrent detection; C-Load™ stability avoids peaking with photodiode junction capacitance. |
Use Scenario: Implementing a 4th-order Butterworth low-pass filter in medical ECG front-end conditioning. IC Role / Device Role / Timing Role: Dual op-amp building block for Sallen-Key topology with precise pole placement. Use Value: 12MHz GBW and 400V/µs slew rate maintain filter group delay flatness up to 100kHz; dual-channel integration reduces board area by 50% vs discrete singles. |
| Data Acquisition Buffer | Video Line Driver |
|
Use Scenario: Isolating and driving multiplexed analog signals to a SAR ADC in automated test equipment. IC Role / Device Role / Timing Role: Unity-gain buffer with fast settling and rail-to-rail compatible output swing. Use Value: 280ns settling to 0.01% ensures accurate sampling after channel switching; ±12V swing into 500Ω meets 12-bit+ system dynamic range needs. |
Use Scenario: Driving 75Ω coaxial video lines in broadcast camera signal processing modules. IC Role / Device Role / Timing Role: High-current, low-distortion line driver with wideband flat response. Use Value: Stable with 1000pF load (equivalent to ~10m coax) and <3% THD at 1MHz enables clean SD/HD video transmission without termination resistors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual high-speed op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT1358CS8#PBF | 25MHz GBW, 600V/µs slew rate, 2mA supply current per amp - higher speed but 60% more power draw. | Better suited for >10MHz signal paths (e.g., ultrasound receive chains); less optimal for battery-powered DAQ due to current. | Select when bandwidth >15MHz is required and thermal headroom allows higher IS. |
| OPA2350UA/2K5 | 38MHz GBW, 22V/µs slew rate, rail-to-rail I/O, 5.5mA supply current - CMOS input, lower noise floor (7nV/√Hz) but slower slewing. | Ideal for single-supply, low-voltage (<5.5V) systems; unsuitable for ±15V industrial rails or fast transient capture. | Choose for portable instrumentation with 3.3V/5V supplies where RRO and ultra-low noise outweigh slew rate needs. |
Compared with LT1358CS8#PBF and OPA2350UA/2K5, the LT1355CS8#PBF uniquely balances 12MHz bandwidth, 400V/µs slew rate, and 1.25mA power in a robust ±15V-capable SO-8 package - making it the optimal choice for cost-sensitive, thermally constrained dual-channel industrial signal conditioning.
Availability
LT1355CS8#PBF is available at Aetrix Electronics and suitable for data acquisition systems, active filter designs, photodiode amplification, and video line driving requiring stable component supply across industrial temperature ranges (0°C to 70°C).
Supply support for LT1355CS8#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, inheriting its legacy of high-performance analog ICs designed for precision, speed, and reliability in demanding applications.
The LT1355CS8#PBF belongs to Linear's high-speed op amp family engineered for data acquisition, instrumentation, and signal conditioning - emphasizing unity-gain stability, capacitive-load drive, and low-noise precision in compact packages.
FAQ
What is the maximum capacitive load the LT1355CS8#PBF can drive while remaining stable?
The LT1355CS8#PBF is specified as C-Load™ stable with any capacitive load - including 10,000pF - without external compensation. While stability is guaranteed, bandwidth and phase margin decrease with increasing CL; for 1000pF loads, typical bandwidth remains >1MHz with <10% peaking in transient response. Always verify loop stability in final layout using actual parasitic capacitance.
Does the LT1355CS8#PBF support single-supply operation?
Yes, the LT1355CS8#PBF operates with total supply voltages from ±2.5V to ±15V, enabling true single-supply use (e.g., V+ = 5V, V– = 0V). Input common-mode range extends to within 0.5V of rails, and output swing reaches within 1.2V of each rail under 150Ω load - sufficient for many 3.3V or 5V systems with appropriate level-shifting.
What is the typical input bias current polarity of the LT1355CS8#PBF?
The LT1355CS8#PBF uses complementary NPN/PNP input transistors for first-order bias cancellation, resulting in net input bias current typically <300nA - but polarity (positive or negative) varies unit-to-unit due to beta mismatch. For DC-critical applications, use matched source impedances at both inputs to minimize offset voltage contribution from IB.
How does slew rate vary with gain configuration in the LT1355CS8#PBF?
Slew rate in the LT1355CS8#PBF is input-voltage-dependent: SR ∝ |VIN+ − VIN−|. In unity-gain (AV = 1) or inverting gain-of-1 (AV = –1) configurations, a 10V output step produces a full 10V differential input, yielding maximum slew rate (400V/µs at ±15V). At AV = –2, the same output step creates only a 5V input differential, reducing effective slew rate - confirmed by datasheet test conditions specifying AV = –2 for SR measurement.
Is the LT1355CS8#PBF pin-compatible with other dual op amps in SO-8 packages?
No - the LT1355CS8#PBF uses a non-standard SO-8 pinout optimized for dual-amplifier symmetry: Pins 1/2/4 = Amp A (–IN/+IN/OUT), Pins 5/6/7/8 = Amp B (OUT/V–/–IN/+IN). It is not pin-compatible with industry-standard dual op amps like LM358 or TL072. Layout reuse requires verification against the official S8 pin diagram in the datasheet.
LT1355CS8#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- LT®
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- Voltage Feedback
- Number of Circuits:
- 2
- 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 (x2 Channels)
- Current - Output / Channel:
- 30 mA
- 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
LT1355CS8#PBF FAQ
1.How can I place an order for LT1355CS8#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1355CS8#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 LT1355CS8#PBF reliable?
The price and inventory of LT1355CS8#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1355CS8#PBF is usually 5 days.
3.What payment methods are accepted for LT1355CS8#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1355CS8#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1355CS8#PBF?
LT1355CS8#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1355CS8#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 LT1355CS8#PBF?
For technical support, including LT1355CS8#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1355CS8#PBF requirements.
6.How does Aetrix verify that LT1355CS8#PBF is sourced from the original manufacturer or authorized distributors?
All LT1355CS8#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 LT1355CS8#PBF meets industry standards.
7.What is the process for return or replacement of LT1355CS8#PBF?
All LT1355CS8#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1355CS8#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 LT1355CS8#PBF part is unused and in its original packaging.
Return procedure for LT1355CS8#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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