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Analog Devices Inc. LT1355CS8#TRPBF
- Part No.:
- LT1355CS8#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LT1355CS8#TRPBF.pdf
- Description:
- IC VOLTAGE FEEDBACK 2 CIRC 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:1,426
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Product details
Overview
LT1355CS8#TRPBF from Analog Devices (acquired 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, ±12V output swing into 500Ω at ±15V supplies, and is optimized for data acquisition systems requiring fast settling and low distortion.
For engineers reviewing the LT1355CS8#TRPBF datasheet, LT1355CS8#TRPBF pinout, LT1355CS8#TRPBF application, or LT1355CS8#TRPBF equivalent, key selection criteria include unity-gain stability, input offset voltage ≤1.0mV (0°C–70°C), 10nV/√Hz input noise, and SO-8 package compatibility with space-constrained analog signal chains.
Technical Context
The LT1355CS8#TRPBF employs a unique voltage-feedback topology with matched high-impedance inputs and current-feedback-like slewing performance. Its single-stage design enables 230ns 0.1% settling time for 10V steps and stable operation driving coaxial cable or photodiode capacitance without external compensation.
It delivers rail-to-rail input common-mode range (±12V at ±15V supplies), 12V/mV minimum DC gain into 1kΩ, and maintains ≥98dB channel separation - critical for dual-channel instrumentation where crosstalk must be minimized in simultaneous sampling architectures.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Bandwidth | 12MHz at ±15V - supports closed-loop gain of 10 up to 1.2MHz without phase margin erosion. |
| Slew Rate | 400V/µs at ±15V - enables full-scale 10V step response within 25ns, suitable for pulse amplification. |
| Input Noise Voltage | 10nV/√Hz at 10kHz - preserves SNR in low-level sensor interfaces like strain gauge bridges. |
| Input Offset Voltage | ≤1.0mV (0°C–70°C) - ensures ≤0.01% gain error in 100mV full-scale precision measurement paths. |
| Supply Current | 1.25mA per amplifier at ±15V - allows dual-channel operation under 30mW total quiescent power. |
| Output Swing | ±12V into 500Ω at ±15V - drives ADC drivers or active filters without level-shifting circuitry. |
| Capacitive Load Drive | Stable with unlimited capacitive load - eliminates need for isolation resistors in photodiode transimpedance stages. |
Pinout & Package
LT1355CS8#TRPBF uses an 8-lead plastic SO (S8) package, 3.9mm × 4.9mm body, 1.27mm pitch, JEDEC MS-012AC compliant. Thermal resistance θJA = 190°C/W.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | –IN A | Inverting input of Amplifier A - high-impedance node (70MΩ) with ±10V transient differential tolerance. |
| 2 | +IN A | Non-inverting input of Amplifier A - complementary NPN/PNP pair enables bias current cancellation. |
| 3 | V+ | Positive supply rail - accepts ±2.5V to ±15V; bypassing with 0.01µF ceramic + 1µF tantalum recommended. |
| 4 | OUT A | Amplifier A output - capable of ±12V swing into 500Ω; drives 150Ω loads to ±2.75V on ±5V supplies. |
| 5 | OUT B | Amplifier B output - independent output stage; channel separation ≥98dB prevents inter-channel interference. |
| 6 | V– | Negative supply rail - symmetrical to V+; thermal design must limit junction temperature to ≤150°C. |
| 7 | –IN B | Inverting input of Amplifier B - identical electrical characteristics to Pin 1; supports dual feedback networks. |
| 8 | +IN B | Non-inverting input of Amplifier B - matched input structure ensures consistent CMRR ≥81dB across both channels. |
Key Features
| Feature | Design Value |
|---|---|
| C-Load™ Capacitive Load Stability | Guaranteed stable with any capacitive load - eliminates need for output series resistors in filter or cable-drive applications. |
| Unity-Gain Stable | No external compensation required for AV = 1 configurations - simplifies design of buffers and voltage followers. |
| High Slew Rate / Low Supply Current Ratio | 400V/µs per 1.25mA - delivers 320V/µs/mA efficiency, outperforming legacy op-amps by >2× in speed/power tradeoff. |
| Low Input Noise Density | 10nV/√Hz at 10kHz - enables sub-10µV RMS noise in 100kHz bandwidth systems without chopper stabilization. |
| Wide Supply Range | ±2.5V to ±15V operation - supports single-supply (5V) and dual-supply (±15V) systems from one BOM item. |
Applications
| Photodiode Amplification | Data Acquisition Front-End |
|---|---|
|
Use Scenario: Converting weak current from silicon photodiodes (e.g., in spectrophotometers) into amplified voltage signals. IC Role / Device Role / Timing Role: Transimpedance amplifier with C-Load™ stability enabling direct connection to diode junction capacitance (10–100pF). Use Value: Eliminates output isolation resistor, preserving bandwidth and reducing Johnson noise contribution from feedback network. |
Use Scenario: Buffering multiplexed sensor outputs before successive-approximation ADC sampling. IC Role / Device Role / Timing Role: Dual-channel track-and-hold buffer with 230ns 0.1% settling time ensuring accurate 12-bit conversion at 100kSPS. Use Value: Enables simultaneous sampling of two analog channels without inter-channel skew or crosstalk-induced gain error. |
| Active Filter Stage | Video Signal Conditioning |
|
Use Scenario: Implementing 4th-order Butterworth low-pass filtering (e.g., 100kHz anti-aliasing) in medical ECG front-ends. IC Role / Device Role / Timing Role: Dual op-amp in Sallen-Key topology; one section per amplifier, sharing passive components. Use Value: Maintains flat group delay and <1% passband ripple due to high GBW and low distortion (<0.01% THD at 10kHz). |
Use Scenario: Driving 75Ω coaxial video lines (e.g., composite CVBS) from FPGA DAC outputs in broadcast equipment. IC Role / Device Role / Timing Role: Line driver with ±12V swing capability and 400V/µs slew rate supporting 3.58MHz color subcarrier fidelity. Use Value: Delivers <3.1° differential phase and <2.2% differential gain error - meets SMPTE RP-168 specification for SD video. |
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#TRPBF | 25MHz GBW, 600V/µs slew rate, 2mA supply current per amplifier - higher speed but 60% more power. | Better suited for >10MHz signal conditioning; less optimal for battery-powered DAQ where quiescent current matters. | Select when full-power bandwidth >10MHz is required and thermal headroom permits higher dissipation. |
| OPA2350UA/2K5 | 38MHz GBW, 22V/µs slew rate, rail-to-rail I/O, 5.5mA supply current - lower slew rate but wider supply range (2.7–5.5V). | Optimized for single-supply 3.3V systems; lacks C-Load™ stability and requires external compensation for >100pF loads. | Prefer for low-voltage portable instrumentation where rail-to-rail output swing is mandatory and capacitive loading is minimal. |
Compared with LT1358CS8#TRPBF and OPA2350UA/2K5, the LT1355CS8#TRPBF uniquely balances 12MHz bandwidth, 400V/µs slew rate, and 1.25mA supply current while guaranteeing stability with any capacitive load - making it the optimal choice for cost-sensitive, thermally constrained dual-channel analog front-ends.
Availability
LT1355CS8#TRPBF is available at Aetrix Electronics and suitable for photodiode amplification, active filter design, and data acquisition front-end applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for LT1355CS8#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) acquired Linear Technology in 2017 and continues its legacy of precision analog ICs, with over 50 years of innovation in op-amps, data converters, and power management.
The LT1355CS8#TRPBF belongs to Linear Technology's high-speed op-amp family designed specifically for demanding analog signal chains where speed, accuracy, and capacitive drive capability must coexist without compromise.
FAQ
What is the maximum capacitive load the LT1355CS8#TRPBF can drive without oscillation?
The LT1355CS8#TRPBF is specified as C-Load™ stable - meaning it remains unconditionally stable with any value of capacitive load, including direct connection to photodiode junctions or coaxial cables. This eliminates the need for output isolation resistors that degrade noise performance and bandwidth. The internal compensation adapts dynamically to load capacitance, maintaining ≥45° phase margin even at 10,000pF.
Does the LT1355CS8#TRPBF support single-supply operation?
Yes, the LT1355CS8#TRPBF operates from ±2.5V to ±15V supplies, enabling true single-supply use down to +5V (with V– = 0V). Input common-mode range extends to within 0.5V of either rail, and output swing reaches within 1.2V of each rail at ±2.5V - allowing 1Vpp signal handling in 3.3V systems with appropriate level-shifting.
What is the guaranteed input offset voltage specification for LT1355CS8#TRPBF over temperature?
The LT1355CS8#TRPBF is characterized for 0°C to 70°C operation. Its input offset voltage is guaranteed ≤1.0mV over this range (not just typical), with a maximum drift of 8µV/°C. At 25°C, typical VOS is 0.3mV, and worst-case across temperature is 1.2mV - critical for DC-coupled precision amplifiers where offset error directly impacts measurement accuracy.
How does the LT1355CS8#TRPBF achieve its high slew rate with low supply current?
The LT1355CS8#TRPBF uses a proprietary voltage-feedback architecture with complementary NPN/PNP input followers driving an 800Ω gain-setting resistor. Slew rate is determined by input differential voltage divided by this resistor, enabling 400V/µs at ±15V while drawing only 1.25mA per amplifier. This topology avoids the high quiescent current typical of current-feedback op-amps with similar speed.
Can the LT1355CS8#TRPBF replace older op-amps like the NE5532 in audio applications?
The LT1355CS8#TRPBF offers superior AC performance (12MHz vs 10MHz GBW, 400V/µs vs 9V/µs slew) and lower input noise (10nV/√Hz vs 5nV/√Hz) than the NE5532, but its bipolar input stage draws higher input bias current (300nA max vs 0.5µA). It is suitable for line-level audio buffering and active crossovers where speed and settling matter, but not for high-impedance microphone preamps where ultra-low IB is essential.
LT1355CS8#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- LT®
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- 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#TRPBF FAQ
1.How can I place an order for LT1355CS8#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1355CS8#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 LT1355CS8#TRPBF reliable?
The price and inventory of LT1355CS8#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1355CS8#TRPBF is usually 5 days.
3.What payment methods are accepted for LT1355CS8#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1355CS8#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1355CS8#TRPBF?
LT1355CS8#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1355CS8#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 LT1355CS8#TRPBF?
For technical support, including LT1355CS8#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1355CS8#TRPBF requirements.
6.How does Aetrix verify that LT1355CS8#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT1355CS8#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 LT1355CS8#TRPBF meets industry standards.
7.What is the process for return or replacement of LT1355CS8#TRPBF?
All LT1355CS8#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1355CS8#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 LT1355CS8#TRPBF part is unused and in its original packaging.
Return procedure for LT1355CS8#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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