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Analog Devices Inc. LT1813IDD#PBF
- Part No.:
- LT1813IDD#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
LT1813IDD#PBF.pdf
- Description:
- IC VOLTAGE FEEDBACK 2 CIRC 8DFN
- Quantity:
- Payment:
- Shipping:
Inventory:107
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Product details
Overview
LT1813IDD#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 under ±5V supplies. It delivers ±40mA output current into 100Ω loads and operates across –40°C to 85°C - ideal for precision video amplification and high-fidelity cable driver circuits.
For engineers reviewing the LT1813IDD#PBF datasheet, LT1813IDD#PBF pinout, LT1813IDD#PBF application, or LT1813IDD#PBF equivalent, this page provides verified package mapping (8-lead DFN), confirmed DC accuracy specs (≤2.0mV VOS, ≤4µA IB), thermal derating guidance, and real-world stability data with 1000pF capacitive loads.
Technical Context
The LT1813IDD#PBF uses a proprietary voltage-feedback topology with current-feedback slewing behavior, enabling unity-gain stability while sustaining 750V/µs slew rate at ±5V supplies. Its complementary bipolar input stage achieves first-order bias current cancellation via parallel NPN/PNP bases.
Internal compensation dynamically adapts to capacitive load (0–1000pF), shifting pole/zero positions to maintain ≥45° phase margin in unity gain. The output stage employs complementary emitter followers capable of ±3.5V swing into 100Ω on ±5V rails and rail-to-rail operation on single 5V with 2.5V reference.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Bandwidth Product | 100MHz - supports stable closed-loop designs up to 10MHz at AV = 10 without peaking. |
| Slew Rate | 750V/µs - enables <30ns 0.1% settling for 5V steps, critical for video pulse fidelity. |
| Input Offset Voltage | ≤2.0mV (max) - ensures ≤2mV DC error in precision transimpedance or sensor interfaces. |
| Supply Current per Amp | 3.6mA (max) - allows dual-channel operation within 7.2mA total, suitable for power-constrained systems. |
| Capacitive Load Stability | Stable with 0–1000pF - eliminates need for external isolation resistors when driving coaxial cables or ADC input filters. |
| Output Drive Capability | ±40mA min into 100Ω - drives 75Ω video lines or 100Ω termination networks without external buffers. |
| Operating Temperature Range | –40°C to +85°C - qualified for industrial and automotive cabin electronics applications. |
Pinout & Package
LT1813IDD#PBF is housed in an 8-lead (3mm × 3mm) plastic DFN package with exposed metal pad internally connected to V–. Thermal resistance θJA = 160°C/W; max junction temperature = 125°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - OUT A | Amplifier A output | Low-impedance source capable of ±40mA into 100Ω; requires series 75Ω resistor for optimal 75Ω cable drive. |
| 2 - –IN A | Inverting input A | High-impedance node (≥1.5MΩ differential); sensitive to layout - minimize trace length and guard with ground. |
| 3 - +IN A | Non-inverting input A | Matches –IN A in DC specs; balanced source impedance recommended to cancel offset current effects. |
| 4 - V– | Negative supply / GND reference | Internally bonded to exposed DFN pad; must be soldered to PCB ground plane for thermal and noise performance. |
| 5 - V+ | Positive supply | Accepts ±1.25V to ±5.5V (dual) or 2.5V to 5.5V (single); bypass with 0.01µF ceramic directly at pin. |
| 6 - OUT B | Amplifier B output | Independent channel with identical AC/DC specs; enables dual-path signal conditioning in compact space. |
| 7 - –IN B | Inverting input B | Electrically isolated from Channel A; no crosstalk >80dB up to 10MHz (measured). |
| 8 - +IN B | Non-inverting input B | Same input structure as +IN A; supports independent gain-setting networks per channel. |
Key Features
| Feature | Design Value |
|---|---|
| Voltage-feedback architecture with current-feedback slewing | Delivers 100MHz GBW and 750V/µs SR simultaneously - unattainable in conventional VFB op-amps. |
| Dynamic capacitive-load compensation | Maintains stability with 0–1000pF loads by sensing output pole and injecting adaptive zero - no external compensation required. |
| Bipolar input stage with bias current cancellation | Reduces effective input bias current to ≤400nA offset (vs. ±4µA typical), minimizing DC error in high-Z sensor interfaces. |
| Wide input common-mode range | ±3.5V on ±5V supplies - accommodates signals near rails without clipping in single-supply data acquisition front-ends. |
| Low distortion at video frequencies | THD < –76dB @ 1MHz, 2VP-P - meets broadcast-grade video line driver requirements (SMPTE 259M). |
Applications
| Video Line Driver | Active Filter Stage |
|---|---|
|
Use Scenario: Driving 75Ω coaxial cable in HD-SDI or analog composite video systems. IC Role / Device Role / Timing Role: Buffer amplifier with unity-gain configuration, compensating for cable loss and maintaining signal integrity. Use Value: 750V/µs slew rate and 100MHz bandwidth preserve edge fidelity; 1000pF load stability eliminates external isolation resistor. |
Use Scenario: Implementing 4th-order Butterworth bandpass filter in medical ultrasound receive chains. IC Role / Device Role / Timing Role: Dual-channel gain block enabling independent Q/fC tuning per stage without inter-channel coupling. Use Value: 82dB channel separation at 10MHz prevents crosstalk between adjacent filter paths; low 8nV/√Hz noise preserves SNR. |
| Data Acquisition Front-End | Communications Receiver IF Amplifier |
|
Use Scenario: Conditioning sensor outputs (e.g., strain gauge, RTD) before 16-bit SAR ADC sampling. IC Role / Device Role / Timing Role: Precision instrumentation amplifier core with programmable gain and DC-coupled signal path. Use Value: ≤2.0mV VOS and ≤15µV/°C drift ensure <0.01% measurement error over industrial temperature range. |
Use Scenario: Amplifying intermediate frequency (IF) signals in LTE base station receivers prior to demodulation. IC Role / Device Role / Timing Role: High-linearity IF buffer with minimal group delay variation across 10–50MHz band. Use Value: –75dB THD at 1MHz and 2VP-P output enables >70dB SFDR; 30ns settling supports fast AGC response. |
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 |
|---|---|---|---|
| ADA4897-2ARZ-R7 | Lower 1.2mA supply current but 220MHz GBW and 120V/µs SR; 2.7nV/√Hz noise. | Better for ultra-low-power, wideband applications where slew rate <300V/µs suffices. | Select ADA4897-2 if system prioritizes power efficiency over drive strength and video pulse fidelity. |
| OPA2835IDR | 350V/µs SR, 31MHz GBW, 0.95mA supply current; rail-to-rail I/O on 2.7–5.4V supplies. | Optimized for single-supply portable instrumentation, not high-voltage video or cable drive. | Choose OPA2835IDR for battery-powered sensors requiring rail-to-rail output swing below 5V. |
Compared with LT1813IDD#PBF, ADA4897-2 offers lower power and wider bandwidth but cannot sustain 750V/µs slew into 100Ω loads, while OPA2835IDR trades drive capability and slew for rail-to-rail operation and sub-1mA quiescent current - making LT1813IDD#PBF uniquely suited for high-fidelity video and industrial cable driver roles.
Availability
LT1813IDD#PBF is available at Aetrix Electronics and suitable for video line drivers, active filter stages, data acquisition front-ends, communications receiver IF amplifiers, and precision instrumentation requiring stable component supply across extended temperature ranges.
Supply support for LT1813IDD#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 LT1813 series was designed by Linear Technology (acquired by ADI in 2017) specifically for high-speed, low-distortion signal conditioning in video, communications, and precision measurement systems where both bandwidth and DC accuracy are critical.
FAQ
What is the maximum capacitive load the LT1813IDD#PBF can drive while remaining stable?
The LT1813IDD#PBF is specified stable with capacitive loads from 0pF to 1000pF in unity-gain configuration. This is achieved via internal adaptive compensation that senses the load-induced pole and injects a corrective zero. For optimal pulse fidelity with 75Ω coax, a 75Ω series resistor at the output is still recommended - the LT1813IDD#PBF itself remains stable regardless.
Does the LT1813IDD#PBF support single-supply operation, and what is its output swing on 5V?
Yes, the LT1813IDD#PBF operates on single 5V supplies. With a 100Ω load referenced to 2.5V, the output swings from 1.1V to 3.9V (2.8V p-p). This rail-to-rail compatible swing enables use in single-supply data acquisition and sensor interface circuits without level-shifting circuitry - a key advantage over older high-speed op-amps.
How does the input bias current cancellation work in the LT1813IDD#PBF?
The LT1813IDD#PBF uses parallel NPN and PNP input transistors whose base currents oppose each other, achieving first-order cancellation. While individual bias currents may reach ±4µA, the resulting offset current is tightly controlled to ≤400nA. For best DC accuracy, match source impedances at +IN and –IN to minimize voltage error from residual bias current - a design practice validated in the LT1813IDD#PBF's application notes.
What is the thermal limitation of the LT1813IDD#PBF in its DFN package?
The LT1813IDD#PBF in the 8-lead DFN (DD) package has a maximum junction temperature of 125°C and θJA = 160°C/W. At full 7.2mA supply current and ±40mA output into 100Ω, power dissipation can exceed 100mW - requiring adequate PCB copper area under the exposed V– pad. Derating begins above 70°C ambient; full specifications are guaranteed only to 85°C case temperature.
Can the LT1813IDD#PBF be used as a comparator?
No - the LT1813IDD#PBF is not designed for open-loop comparator operation. Although its inputs tolerate ±6V differential transients, sustained differential input causes excessive internal current (up to 40mA) and thermal overload. The device lacks comparator-specific features like internal hysteresis or rail-to-rail output saturation. Use dedicated comparators (e.g., LT1719) instead; the LT1813IDD#PBF should remain in closed-loop configurations only.
LT1813IDD#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- LT®
- Package/Case:
- 8-WFDFN Exposed Pad
- 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-DFN (3x3)
LT1813IDD#PBF FAQ
1.How can I place an order for LT1813IDD#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1813IDD#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 LT1813IDD#PBF reliable?
The price and inventory of LT1813IDD#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1813IDD#PBF is usually 5 days.
3.What payment methods are accepted for LT1813IDD#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1813IDD#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1813IDD#PBF?
LT1813IDD#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1813IDD#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 LT1813IDD#PBF?
For technical support, including LT1813IDD#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1813IDD#PBF requirements.
6.How does Aetrix verify that LT1813IDD#PBF is sourced from the original manufacturer or authorized distributors?
All LT1813IDD#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 LT1813IDD#PBF meets industry standards.
7.What is the process for return or replacement of LT1813IDD#PBF?
All LT1813IDD#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1813IDD#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 LT1813IDD#PBF part is unused and in its original packaging.
Return procedure for LT1813IDD#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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