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Analog Devices Inc. LT1814IGN#PBF
- Part No.:
- LT1814IGN#PBF
- Manufacturer:
- Analog Devices Inc.
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
LT1814IGN#PBF.pdf
- Description:
- IC OPAMP VFB 4 CIRCUIT 16SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,355
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Product details
Overview
LT1814IGN#PBF from Analog Devices (formerly Linear Technology) is a quad, 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 - ideal for video amplification, active filter design, and high-fidelity cable driver applications.
For engineers reviewing the LT1814IGN#PBF datasheet, LT1814IGN#PBF pinout, LT1814IGN#PBF application, or LT1814IGN#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 SSOP-16 package compatibility in industrial signal conditioning systems.
Technical Context
The LT1814IGN#PBF employs a proprietary voltage-feedback architecture with current-feedback slewing behavior, enabling fast transient response without sacrificing DC precision. Its complementary NPN/PNP input stage provides first-order bias current cancellation and supports differential input voltages up to ±6V (transient only).
Internal compensation dynamically adapts to capacitive loading (0–1000pF), maintaining stability across unity-gain and higher closed-loop configurations. The output stage uses complementary followers buffered from the gain node, allowing robust drive into resistive and reactive loads while preserving phase margin.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Bandwidth Product | 100MHz - enables stable closed-loop operation at gains ≥1 with usable bandwidth up to 100MHz (AV = 1, RL = 500Ω). |
| Slew Rate | 750V/µs - supports 5V step settling in ≤30ns at 0.1% (AV = –1), critical for pulse fidelity in video and data acquisition. |
| Input Offset Voltage | 1.5mV max - ensures <±1mV error in precision DC-coupled gain stages without trimming. |
| Supply Current per Amp | 3.6mA max - four amplifiers draw ≤14.4mA total, suitable for power-constrained instrumentation. |
| Capacitive Load Stability | Stable with 0–1000pF - eliminates need for external isolation resistors when driving coaxial cables or ADC input capacitance. |
| Input Noise Voltage | 8nV/√Hz at 10kHz - maintains SNR >75dB in 1MHz-bandwidth sensor interfaces with 500Ω source impedance. |
| Output Current | ±40mA min into 100Ω - drives 75Ω video lines or 100Ω termination networks without external buffers. |
| Operating Temp Range | –40°C to +85°C - qualified for industrial control and automotive under-hood auxiliary circuits (non-junction-limited). |
Pinout & Package
LT1814IGN#PBF is housed in a 16-pin plastic SSOP (GN) package, 5.3mm × 6.2mm × 1.75mm, with exposed pad internally connected to V– for thermal enhancement and ground reference.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 5, 9, 13 | OUT A/B/C/D | Amplifier outputs - each capable of ±3.5V swing into 100Ω on ±5V supplies; rail-to-rail output not supported. |
| 2, 6, 10, 14 | –IN A/B/C/D | Inverting inputs - high-impedance (≥1.5MΩ differential) nodes sensitive to layout; require matched trace lengths. |
| 3, 7, 11, 15 | +IN A/B/C/D | Non-inverting inputs - same topology as –IN; differential input voltage tolerance ±6V (transient only). |
| 4 | V+ | Positive supply pin - accepts ±1.25V to ±6.5V (LT1813HV variant); LT1814IGN#PBF rated for ±5V nominal. |
| 8 | V– | Negative supply pin - internally connects to exposed pad; must be solidly tied to system ground plane. |
| 12, 16 | NC | No-connect pins - electrically isolated; no internal connection; must remain unconnected per datasheet. |
Key Features
| Feature | Design Value |
|---|---|
| Unity-gain stable with 1000pF load | Eliminates external compensation components in buffer, line-driver, and ADC interface designs. |
| Low 8nV/√Hz input noise | Preserves dynamic range in low-level signal paths (e.g., photodiode transimpedance amps) without added filtering. |
| ±3.5V input CMR on ±5V supplies | Supports direct interfacing to ±3.3V logic or bipolar sensor outputs without level-shifting circuitry. |
| 30ns 0.1% settling time | Meets timing requirements for 33Msps data acquisition systems using multiplexed analog front-ends. |
| 400nA max input offset current | Minimizes voltage error in high-impedance gain-setting networks (e.g., R ≥ 10kΩ), reducing drift-induced gain error. |
| Single-supply operation down to 2.5V | Enables 5V-only systems (V+ = 5V, V– = 0V) with 1.1V to 3.9V output swing into 100Ω referenced to 2.5V. |
Applications
| Video Signal Conditioning | Active Filter Design |
|---|---|
Use Scenario: Driving 75Ω composite video signals over 10m coaxial cable in broadcast equipment. IC Role / Device Role / Timing Role: Buffer amplifier with gain = 1, DC-coupled, compensating for cable loss and maintaining rise time <2ns. Use Value: 750V/µs slew rate and 100MHz bandwidth preserve 5MHz video bandwidth; 1000pF load stability avoids peaking artifacts. | Use Scenario: Implementing a 4th-order Butterworth bandpass filter centered at 100kHz with Q = 10 and programmable gain. IC Role / Device Role / Timing Role: Quad op-amp configured as two 2nd-order sections (one per LT1814 half), sharing common bias and feedback networks. Use Value: Channel separation >80dB prevents crosstalk between adjacent filter stages; low input offset ensures accurate center frequency. |
| Cable Driver for Data Acquisition | High-Speed Instrumentation Amplifier Front-End |
Use Scenario: Transmitting digitized sensor data over 50Ω twisted-pair in modular test equipment. IC Role / Device Role / Timing Role: Single-ended to differential driver (gain = 2) with 50Ω series termination at output. Use Value: ±40mA output current drives 50Ω load to ±2V; 30ns settling guarantees <0.1% error for 16-bit sampling at 10Msps. | Use Scenario: Amplifying low-level thermocouple outputs (≤50mV) before 24-bit sigma-delta ADC in environmental monitoring. IC Role / Device Role / Timing Role: Precision non-inverting amplifier (gain = 100) with matched input resistors minimizing offset current error. Use Value: 1.5mV max VOS and 10µV/°C drift ensure <0.5°C measurement error over –40°C to 85°C ambient. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed op-amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AD8054ARUZ | Higher supply current (12mA per amp), lower GBW (160MHz), no guaranteed 1000pF load stability. | Better for wideband RF IF stages; less suitable for DC-coupled video or precision active filters. | Select AD8054ARUZ only if >120MHz small-signal bandwidth is required and capacitive load <200pF. |
| LMH6624MA/NOPB | Lower noise (4.5nV/√Hz), higher input bias current (±1.2µA), not specified for >500pF load stability. | Preferred for ultra-low-noise photodiode amps; unsuitable for high-CMRR sensor front-ends due to bias current mismatch. | Choose LMH6624MA/NOPB when input-referred noise dominates system SNR and load capacitance is <100pF. |
Compared with AD8054ARUZ and LMH6624MA/NOPB, LT1814IGN#PBF uniquely balances low power (3.6mA/amp), 100MHz GBW, and guaranteed 1000pF capacitive load stability - making it optimal for space-constrained, multi-channel analog signal chains requiring both speed and robustness.
Availability
LT1814IGN#PBF is available at Aetrix Electronics and suitable for video signal conditioning, active filter design, and high-speed instrumentation requiring stable component supply across industrial temperature ranges.
Supply support for LT1814IGN#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 semiconductors, serving industrial, automotive, communications, and healthcare markets.
The LT1814IGN#PBF belongs to Linear Technology's legacy high-speed op-amp product line, engineered for applications demanding simultaneous high bandwidth, low distortion, and DC precision - especially in multi-amplifier signal-path architectures.
FAQ
What is the maximum capacitive load the LT1814IGN#PBF can drive while remaining stable?
The LT1814IGN#PBF is fully specified and guaranteed stable with capacitive loads from 0pF to 1000pF in unity-gain configuration. This capability is achieved via internal adaptive compensation that senses the load-induced pole and adjusts compensation accordingly - eliminating the need for external isolation resistors in cable driver or ADC buffer applications.
Does the LT1814IGN#PBF support single-supply operation, and what is its output swing under those conditions?
Yes, the LT1814IGN#PBF operates from a single 5V supply (V+ = 5V, V– = 0V). With a 100Ω load referenced to 2.5V, the output swings from 1.1V to 3.9V (2.8Vpp), delivering ±1.4V about the common-mode point. This makes it suitable for interfacing with SAR or sigma-delta ADCs requiring mid-supply-biased inputs.
What is the input offset voltage specification for the LT1814IGN#PBF over temperature?
The LT1814IGN#PBF has a maximum input offset voltage of 1.5mV at TA = 25°C, 2.0mV at 0°C to 70°C, and 3.5mV over the full –40°C to +85°C operating range. Its typical offset drift is 10–30µV/°C, ensuring predictable calibration behavior in industrial environments.
Can the LT1814IGN#PBF be used as a comparator?
No - the LT1814IGN#PBF is not designed or characterized for comparator operation. Sustained differential input voltages beyond ±3.5V cause excessive internal current and power dissipation, risking thermal damage. Its internal compensation also introduces significant propagation delay and hysteresis unpredictability in open-loop use.
How does the LT1814IGN#PBF achieve high slew rate while maintaining low input bias current?
The LT1814IGN#PBF uses a parallel NPN/PNP input stage where base currents oppose each other, achieving first-order cancellation of input bias current (±4µA max). The slew rate is determined by differential input voltage divided by an internal resistor (R1), enabling 750V/µs response without relying on high-quiescent-current input devices - thus preserving low power consumption.
LT1814IGN#PBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- LT®
- Package/Case:
- 16-SSOP (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Amplifier Type:
- Voltage Feedback
- Number of Circuits:
- 4
- 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 (x4 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:
- 16-SSOP
LT1814IGN#PBF FAQ
1.How can I place an order for LT1814IGN#PBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT1814IGN#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 LT1814IGN#PBF reliable?
The price and inventory of LT1814IGN#PBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT1814IGN#PBF is usually 5 days.
3.What payment methods are accepted for LT1814IGN#PBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT1814IGN#PBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT1814IGN#PBF?
LT1814IGN#PBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT1814IGN#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 LT1814IGN#PBF?
For technical support, including LT1814IGN#PBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT1814IGN#PBF requirements.
6.How does Aetrix verify that LT1814IGN#PBF is sourced from the original manufacturer or authorized distributors?
All LT1814IGN#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 LT1814IGN#PBF meets industry standards.
7.What is the process for return or replacement of LT1814IGN#PBF?
All LT1814IGN#PBF units undergo pre-shipment inspection (PSI). If there is an issue with LT1814IGN#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 LT1814IGN#PBF part is unused and in its original packaging.
Return procedure for LT1814IGN#PBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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