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Analog Devices Inc. LT1813CS8#TRPBF
- Part No.:
- LT1813CS8#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
LT1813CS8#TRPBF.pdf
- Description:
- IC VOLTAGE FEEDBACK 2 CIRC 8SO
- Quantity:
- Payment:
- Shipping:
Inventory:2,722
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Product details
Overview
LT1813CS8#TRPBF 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 under ±5V supplies. It delivers ±40mA output current into 100Ω loads and operates from –40°C to 85°C, enabling use in video amplification, active filters, and cable driver circuits.
For engineers reviewing the LT1813CS8#TRPBF datasheet, LT1813CS8#TRPBF pinout, LT1813CS8#TRPBF application, or LT1813CS8#TRPBF 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 compatibility with single 5V or split ±5V supplies.
Technical Context
The LT1813CS8#TRPBF employs a voltage-feedback topology with current-feedback slewing behavior, enabling high slew rate without sacrificing DC precision. Its complementary bipolar input stage provides first-order bias current cancellation, while internal compensation ensures stability across 0–1000pF capacitive loads in unity gain.
It features a high-impedance gain node charged by differential input current, resulting in slew rate proportional to input step amplitude. The output stage uses complementary emitter followers buffered by an RC network that bootstraps under light loads and adds phase compensation under heavy capacitive loading to maintain ≥45° phase margin.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Bandwidth Product | 100MHz - supports closed-loop designs up to 10MHz at gain = 10 without significant bandwidth loss. |
| Slew Rate | 750V/µs - enables clean 5V-step response in ≤30ns (0.1% settling), critical for video and pulse applications. |
| Input Offset Voltage | 1.5mV max - ensures <0.5% error in precision DC-coupled gain stages with 100mV input signals. |
| Supply Current per Amplifier | 3.6mA max - allows dual-channel operation within 7.2mA total, suitable for power-constrained portable systems. |
| Input Noise Voltage Density | 8nV/√Hz at 10kHz - maintains SNR >70dB in 1MHz-bandwidth signal chains with 1kΩ source impedance. |
| Output Drive Capability | ±40mA min into 100Ω - drives coaxial cables (75Ω) or terminated backplanes without external buffers. |
| Capacitive Load Stability | Stable with 0–1000pF - eliminates need for external isolation resistors when driving ADC inputs or long traces. |
Pinout & Package
LT1813CS8#TRPBF is housed in an 8-lead plastic SO package (S8), 3.9mm × 4.9mm × 1.75mm, with standard narrow-body footprint and gull-wing leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT A) | Amplifier A output | Low-impedance push-pull output capable of ±40mA into 100Ω; requires no series resistor for 75Ω cable drive. |
| 2 (–IN A) | Inverting input A | Differential input node with 2pF capacitance; sensitive to layout-keep trace short and symmetric with +IN A. |
| 3 (+IN A) | Non-inverting input A | High-impedance input (≥3MΩ); balanced source resistance recommended to minimize offset from 4µA max input bias current. |
| 4 (V–) | Negative supply rail | Return path for both amplifiers; must be decoupled with 0.01µF ceramic placed adjacent to pin. |
| 5 (V+) | Positive supply rail | Power input for both amplifiers; bypassing with 0.01µF ceramic + 1–10µF tantalum recommended for high-current transients. |
| 6 (+IN B) | Non-inverting input B | Independent high-Z input for second channel; same bias and noise characteristics as +IN A. |
| 7 (–IN B) | Inverting input B | Second differential input; shares no internal nodes with Channel A-enables independent filter or gain paths. |
| 8 (OUT B) | Amplifier B output | Fully isolated output stage; channel separation >80dB ensures minimal crosstalk in dual-channel video or data acquisition. |
Key Features
| Feature | Design Value |
|---|---|
| Unity-gain stable with 1000pF load | Eliminates need for external compensation components in buffer or line-driver configurations. |
| 750V/µs slew rate at ±5V | Supports full-swing 5V pulses with <1% distortion up to 10MHz, meeting SMPTE 259M video timing. |
| 8nV/√Hz input voltage noise | Preserves dynamic range in 12-bit+ data acquisition systems with bandwidths up to 10MHz. |
| ±3.5V input common-mode range | Accepts rail-to-rail input signals on ±5V supplies, simplifying level-shifting in mixed-signal interfaces. |
| 3.6mA max supply current per amp | Enables dual-channel high-speed amplification in battery-powered instruments with <15mW quiescent power. |
Applications
| Active Filter Design | Video Signal Conditioning |
|---|---|
Use Scenario: Implementing a 4th-order Butterworth bandpass filter with independently adjustable gain, Q, and center frequency using dual LT1813CS8#TRPBF op-amps in state-variable topology. IC Role / Device Role / Timing Role: Each amplifier serves as integrator or summer in feedback loop; dual-channel matching ensures consistent phase response across channels. Use Value: Achieves <0.12dB passband peaking and –77dB distortion at 2MHz with 1kΩ load-meeting broadcast-grade analog filter specs. | Use Scenario: Driving 75Ω coaxial video lines in SD/HD camera signal chains with DC-coupled sync and active termination. IC Role / Device Role / Timing Role: Output buffer with 75Ω series resistor and 75Ω ground termination; exploits 1000pF load stability for direct cable interface. Use Value: Delivers 0.12% differential gain error and 0.07° differential phase shift at 5MHz-compliant with SMPTE 259M video standards. |
| Cable Driver for Data Acquisition | High-Speed ADC Input Buffer |
Use Scenario: Transmitting ±2V analog sensor outputs over 10m shielded twisted pair to remote DAQ modules. IC Role / Device Role / Timing Role: Low-noise, high-output-current driver with 100Ω series termination; compensates for cable capacitance-induced roll-off. Use Value: Maintains >100MHz –3dB bandwidth into 100pF + 100Ω load, ensuring <0.5LSB error for 12-bit, 10MSPS sampling. | Use Scenario: Buffering multiplexed sensor signals into a 12-bit, 10MSPS SAR ADC with 100pF input capacitance. IC Role / Device Role / Timing Role: Unity-gain follower isolating ADC input from source impedance; leverages fast settling (30ns to 0.1%) for accurate sampling. Use Value: Settles 5V step within 30ns to 0.1%, enabling full-scale accuracy at maximum conversion rate without acquisition time penalty. |
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 | Lower GBW (160MHz vs 100MHz), higher supply current (6mA vs 3.6mA), wider supply range (±12V), but only 220V/µs slew rate. | Better suited for wide-supply industrial sensors; less optimal for low-power, high-slew video or cable drive. | Select AD8052ARZ when ±12V operation or higher open-loop gain is required; avoid when 750V/µs slew or <4mA supply current is mandatory. |
| OPA2355DGKR | CMOS input (fA bias), lower noise (5.5nV/√Hz), but only 200MHz GBW and 350V/µs slew; not stable with >100pF load. | Ideal for high-impedance, low-noise sensor front-ends; unsuitable for capacitive-load-heavy video or cable applications. | Choose OPA2355DGKR for ultra-low bias current or sub-6nV/√Hz noise needs; reject for 1000pF stability or >500V/µs slew requirements. |
Compared with AD8052ARZ and OPA2355DGKR, the LT1813CS8#TRPBF uniquely balances 750V/µs slew rate, 100MHz bandwidth, 1000pF capacitive load stability, and sub-4mA supply current-making it the only dual op-amp satisfying simultaneous video fidelity, cable drive robustness, and power efficiency in compact SO-8 packaging.
Availability
LT1813CS8#TRPBF is available at Aetrix Electronics and suitable for video signal conditioning, active filter design, and high-speed data acquisition systems requiring stable component supply, guaranteed temperature performance (–40°C to 85°C), and long-term production continuity.
Supply support for LT1813CS8#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) is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, formed through the acquisition of Linear Technology in 2017.
The LT1813CS8#TRPBF belongs to Linear Technology's legacy high-speed op-amp family, engineered specifically for applications demanding wide bandwidth, high slew rate, and robust capacitive load drive-such as professional video equipment, test instrumentation, and communications infrastructure.
FAQ
What is the maximum capacitive load the LT1813CS8#TRPBF can drive while remaining stable?
The LT1813CS8#TRPBF is specified as unity-gain stable with capacitive loads from 0pF to 1000pF. This capability is achieved via internal adaptive compensation that senses the load-induced pole and adjusts compensation at the gain node. At 1000pF, bandwidth reduces and peaking increases, but phase margin remains >45°-ensuring reliable operation in cable driver and ADC buffer roles without external isolation resistors.
Does the LT1813CS8#TRPBF support single-supply operation?
Yes, the LT1813CS8#TRPBF operates from a single 5V supply. Under this condition, its output swings from 1.1V to 3.9V into a 100Ω load referenced to 2.5V, and its input common-mode range extends from 0.8V to 3.5V. All key AC specifications-including 94MHz GBW and 350V/µs slew rate-are characterized at 5V, making it suitable for modern low-voltage data acquisition and portable instrumentation designs.
What is the input bias current polarity and magnitude for the LT1813CS8#TRPBF?
The LT1813CS8#TRPBF uses a parallel NPN/PNP bipolar input stage, resulting in input bias current polarity that may be positive or negative due to beta mismatch-though magnitude is tightly controlled. The datasheet specifies ±4µA maximum at 25°C and ±6µA over –40°C to 85°C. For best DC accuracy, balanced source impedances are recommended to cancel offset contributions from the 400nA max input offset current.
Can the LT1813CS8#TRPBF be used as a comparator?
No-the LT1813CS8#TRPBF is not designed or characterized for comparator operation. While its inputs tolerate ±6V differential voltage transiently, sustained differential input causes excessive internal current (up to 40mA) and power dissipation, risking thermal damage. Its internal compensation also prevents fast, clean saturation recovery. For comparator functions, dedicated devices such as the LT1719 or ADCMP350 should be used instead of the LT1813CS8#TRPBF.
What PCB layout practices maximize performance of the LT1813CS8#TRPBF?
To maximize performance of the LT1813CS8#TRPBF, use a solid ground plane, minimize trace lengths-especially on the inverting input-and place 0.01µF ceramic bypass capacitors directly at V+ and V– pins. For high-current applications, add 1–10µF tantalum capacitors nearby. Avoid large feedback resistors (>1kΩ) without compensating capacitors (CF > RG·CIN/RF) to prevent peaking. Keep input traces symmetrical and away from noisy digital routing to preserve 80dB channel separation and low THD.
LT1813CS8#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:
- 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#TRPBF FAQ
1.How can I place an order for LT1813CS8#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1813CS8#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 LT1813CS8#TRPBF reliable?
The price and inventory of LT1813CS8#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1813CS8#TRPBF is usually 5 days.
3.What payment methods are accepted for LT1813CS8#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1813CS8#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1813CS8#TRPBF?
LT1813CS8#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1813CS8#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 LT1813CS8#TRPBF?
For technical support, including LT1813CS8#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1813CS8#TRPBF requirements.
6.How does Aetrix verify that LT1813CS8#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT1813CS8#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 LT1813CS8#TRPBF meets industry standards.
7.What is the process for return or replacement of LT1813CS8#TRPBF?
All LT1813CS8#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1813CS8#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 LT1813CS8#TRPBF part is unused and in its original packaging.
Return procedure for LT1813CS8#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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