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Analog Devices Inc. LT1813CS8#PBF
- Part No.:
- LT1813CS8#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LT1813CS8#PBF.pdf
- Description:
- IC VOLTAGE FEEDBACK 2 CIRC 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:479
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Product details
Overview
LT1813CS8#PBF from Analog Devices (formerly Linear Technology) is a dual, low-power, high-speed voltage-feedback operational amplifier with 100MHz gain bandwidth, 750V/µs slew rate, and ±3.5V input common-mode range on ±5V supplies. It delivers ±40mA output current into 100Ω loads and operates from –40°C to 85°C, making it suitable for video amplification, active filter design, and high-fidelity cable driver applications.
For engineers reviewing the LT1813CS8#PBF datasheet, LT1813CS8#PBF pinout, LT1813CS8#PBF application, or LT1813CS8#PBF equivalent, key selection criteria include unity-gain stability with up to 1000pF capacitive load, 8nV/√Hz input noise, 1.5mV max input offset voltage, and SO-8 package compatibility with standard PCB layouts for signal conditioning in data acquisition and communications receivers.
Technical Context
The LT1813CS8#PBF uses a proprietary voltage-feedback topology that achieves current-feedback-like slewing behavior via differential input stage current mirroring into a high-impedance node. Its internal compensation dynamically adapts to capacitive loading up to 1000pF by sensing the output pole and adding frequency-dependent phase correction.
It features complementary NPN/PNP emitter followers at the input and a buffered output stage with bootstrapped RC network, enabling stable operation across supply voltages from ±2.5V to ±5V while maintaining 30ns 0.1% settling time for 5V steps and <0.22% differential gain error at 1MHz in video applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Bandwidth Product | 100MHz - supports closed-loop gains ≥2 at >50MHz signal bandwidth for wideband amplification |
| Slew Rate | 750V/µs - enables clean 5V-step response in ≤30ns without slewing distortion |
| Input Offset Voltage | 1.5mV max - ensures ≤1.5mV DC error in precision transimpedance or sensor interface circuits |
| Supply Current per Amp | 3.6mA max - allows dual-channel operation under 7.2mA total, ideal for power-constrained systems |
| Output Drive | ±40mA min into 100Ω - drives coaxial cables or 150Ω video loads without external buffers |
| Capacitive Load Stability | 0–1000pF - eliminates need for external isolation resistors when driving ADC inputs or long traces |
| Input Noise Density | 8nV/√Hz at 10kHz - preserves SNR in low-level signal amplification stages before ADCs |
| Operating Temp Range | –40°C to 85°C - qualified for industrial-grade embedded systems without derating |
Pinout & Package
LT1813CS8#PBF is housed in an 8-lead plastic SO (S8) package, 3.9mm × 4.9mm × 1.75mm, with gull-wing leads and JEDEC-standard footprint. The package supports reflow soldering and provides thermal resistance θJA = 150°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT A) | Amplifier A output | Low-impedance buffered output capable of ±40mA drive into 100Ω |
| 2 (–IN A) | Inverting input A | Differential input node with 2pF capacitance; requires matched source impedance for bias current cancellation |
| 3 (+IN A) | Non-inverting input A | Differential input node with 2pF capacitance; base-connected NPN/PNP pair enables ±6V transient tolerance |
| 4 (V–) | Negative supply rail | Internally connected to substrate; must be decoupled with 0.01µF ceramic capacitor |
| 5 (V+) | Positive supply rail | Accepts ±2.5V to ±5V supplies; quiescent current scales linearly with supply voltage |
| 6 (+IN B) | Non-inverting input B | Independent second amplifier input; identical specs to Channel A |
| 7 (–IN B) | Inverting input B | Independent second amplifier inverting input; supports separate feedback networks |
| 8 (OUT B) | Amplifier B output | Fully independent output with same drive strength and settling performance as OUT A |
Key Features
| Feature | Design Value |
|---|---|
| Unity-gain stable with 1000pF load | Eliminates external compensation components in buffer and line-driver configurations |
| 750V/µs slew rate | Supports full-swing 5V signals at >10MHz without distortion in gain-of-1 video paths |
| 8nV/√Hz input noise | Maintains >70dB SNR for 100kHz baseband signals amplified prior to 16-bit ADCs |
| ±3.5V input CMR on ±5V | Allows direct interfacing with ±3.3V logic or bipolar sensor outputs without level-shifting |
| 30ns 0.1% settling time | Enables accurate sampling of fast pulses in data acquisition systems with >30MSPS throughput |
| Channel separation >80dB | Prevents crosstalk between dual channels in stereo audio or differential signal processing |
Applications
| Video Signal Amplification | Active Bandpass Filtering |
|---|---|
Use Scenario: Driving 75Ω coaxial video lines from FPGA DAC outputs in broadcast equipment. IC Role / Device Role / Timing Role: High-fidelity voltage buffer with low differential gain/phase error and minimal group delay variation. Use Value: Delivers <0.22% differential gain and <0.21° differential phase at 1MHz, preserving color fidelity in SD/HD video. | Use Scenario: Implementing tunable bandpass filters for RF IF stages in SDR receivers. IC Role / Device Role / Timing Role: Dual op-amp configured as independent gain/Q/fC-settable biquad sections. Use Value: Enables precise 100kHz center frequency with Q=10 and gain=1 using standard resistor/capacitor values. |
| Data Acquisition Front-End | High-Speed Cable Driver |
Use Scenario: Conditioning sensor outputs (e.g., piezoelectric, strain gauge) before multiplexed ADC sampling. IC Role / Device Role / Timing Role: Low-noise, fast-settling gain stage with rail-to-rail compatible input range. Use Value: 8nV/√Hz noise and 30ns settling ensure <1LSB error in 16-bit systems sampling at 1MSPS. | Use Scenario: Transmitting high-speed digital eye diagrams over 1m PCB traces or flexible cables. IC Role / Device Role / Timing Role: Low-output-impedance driver with controlled edge rates and minimal overshoot. Use Value: 0.4Ω output resistance and <25% overshoot enable clean 100MHz square wave transmission. |
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 |
|---|---|---|---|
| AD8052ARZ | Higher 325MHz GBW but 11mA supply current per amp; no guaranteed 1000pF capacitive load stability | Better for >100MHz small-signal amplification; unsuitable for heavy capacitive buffering | Select AD8052ARZ only when bandwidth >150MHz is required and layout allows strict decoupling |
| OPA2355DGKR | Lower 200MHz GBW, 5.5mA supply current, rail-to-rail output; specified only to 100pF load | Preferred for single-supply 3.3V systems with RRO requirement; not rated for ±5V video swing | Choose OPA2355DGKR for battery-powered portable instruments needing 3.3V operation and RRO |
Compared with LT1813CS8#PBF, AD8052ARZ trades higher bandwidth for significantly higher power and reduced capacitive load tolerance, while OPA2355DGKR offers rail-to-rail output at lower speed and narrower supply range-making LT1813CS8#PBF optimal for industrial ±5V systems requiring robust 1000pF stability and low noise.
Availability
LT1813CS8#PBF is available at Aetrix Electronics and suitable for video signal amplification, active filtering, and high-speed data acquisition systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for LT1813CS8#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. (ADI) is a global leader in high-performance analog, mixed-signal, and digital signal processing technologies, serving industrial, automotive, communications, and healthcare markets.
The LT1813CS8#PBF belongs to Linear Technology's precision high-speed op-amp product line, designed specifically for applications demanding wide bandwidth, low distortion, and robust capacitive load driving capability in space-constrained industrial systems.
FAQ
What is the maximum capacitive load the LT1813CS8#PBF can drive while remaining stable?
The LT1813CS8#PBF is fully specified and tested for unity-gain stability with capacitive loads from 0pF to 1000pF. This capability is enabled by its adaptive internal compensation circuitry, which senses the load-induced output pole and adds dynamic phase correction. For loads exceeding 1000pF, external series output resistance may be required to maintain stability, especially in high-gain configurations.
Does the LT1813CS8#PBF support single-supply operation?
Yes, the LT1813CS8#PBF operates from a single 5V supply, delivering output swing from 1.1V to 3.9V into a 100Ω load referenced to 2.5V. Input common-mode range extends from 0.8V to 4.2V under these conditions, allowing direct interfacing with 3.3V logic and many ADC reference levels without level-shifting circuitry.
What is the typical input bias current of the LT1813CS8#PBF and how does it affect precision designs?
The LT1813CS8#PBF exhibits ±4µA maximum input bias current at 25°C, with polarity dependent on NPN/PNP beta matching. Its 400nA maximum input offset current is tightly controlled. For precision applications, balanced source impedances at both inputs minimize offset voltage contribution-e.g., 100Ω on each input limits added error to 40µV versus up to 0.4mV with unbalanced sources.
How does the slew rate of the LT1813CS8#PBF vary with gain configuration?
The LT1813CS8#PBF's slew rate is proportional to differential input voltage, so it is highest in low-gain configurations. At AV = –1, typical slew rate is 750V/µs; at AV = 10, it drops to ~150V/µs due to smaller input step for the same output swing. This behavior is intrinsic to its voltage-feedback architecture with current-mirrored slewing control, and is verified in the datasheet's slew rate vs. input level curves.
Is the LT1813CS8#PBF pin-compatible with other dual op-amps in SO-8 packages?
The LT1813CS8#PBF follows the industry-standard SO-8 pinout for dual op-amps (pins 1/7 = outputs, 2/6 = inverting/non-inverting inputs per channel, 4/5 = supplies), making it mechanically compatible with most SO-8 dual op-amps. However, electrical behavior-including 1000pF load stability, 750V/µs slew rate, and ±3.5V input CMR-is unique to the LT1813CS8#PBF and not replicated by generic SO-8 dual op-amps.
LT1813CS8#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:
- 750V/µs
- Gain Bandwidth Product:
- 100 MHz
- -3db Bandwidth:
- 200 MHz
- Current - Input Bias:
- 900 nA
- Voltage - Input Offset:
- 500 µV
- Current - Supply:
- 3mA (x2 Channels)
- Current - Output / Channel:
- 60 mA
- Voltage - Supply Span (Min):
- 2.5 V
- Voltage - Supply Span (Max):
- 12.6 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SO
LT1813CS8#PBF FAQ
1.How can I place an order for LT1813CS8#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1813CS8#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 LT1813CS8#PBF reliable?
The price and inventory of LT1813CS8#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1813CS8#PBF is usually 5 days.
3.What payment methods are accepted for LT1813CS8#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1813CS8#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1813CS8#PBF?
LT1813CS8#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1813CS8#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 LT1813CS8#PBF?
For technical support, including LT1813CS8#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1813CS8#PBF requirements.
6.How does Aetrix verify that LT1813CS8#PBF is sourced from the original manufacturer or authorized distributors?
All LT1813CS8#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 LT1813CS8#PBF meets industry standards.
7.What is the process for return or replacement of LT1813CS8#PBF?
All LT1813CS8#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1813CS8#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 LT1813CS8#PBF part is unused and in its original packaging.
Return procedure for LT1813CS8#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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