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Texas Instruments OPA814DBVR
- Part No.:
- OPA814DBVR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SC-74A, SOT-753
- Datasheet:
-
OPA814DBVR.pdf
- Description:
- OPA814DBVR
- Quantity:
- Payment:
- Shipping:
Inventory:2,937
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Product details
Overview
OPA814DBVR from Texas Instruments is a unity-gain stable, FET-input voltage-feedback operational amplifier optimized for high-speed, high-precision signal conditioning in wide-dynamic-range systems. It delivers 600 MHz small-signal bandwidth at G = 1 V/V, 250 MHz gain-bandwidth product, 750 V/µs slew rate, and ±250 µV max input offset voltage - enabling accurate buffering and amplification of fast, low-amplitude signals in test equipment front-ends.
For engineers reviewing the OPA814DBVR datasheet, OPA814DBVR pinout, OPA814DBVR application, or OPA814DBVR equivalent, this device is selected when balancing GHz-class bandwidth, sub-mV precision, picoampere input bias current, and JFET-input noise performance (5.3 nV/√Hz) in space-constrained SOT-23 layouts for optical, medical, and DAQ signal chains.
Technical Context
The OPA814DBVR uses a high-voltage complementary bipolar SiGe process with a low-noise JFET input stage, achieving unity-gain stability without external compensation. Its open-loop gain exhibits a 20 dB/decade roll-off crossing 0 dB at 250 MHz, with >65° phase margin at G = 1 V/V and 600 MHz closed-loop bandwidth.
It operates from ±3 V to ±6.3 V total supply (6–12.6 V), supports both single- and dual-supply configurations, and maintains specified performance across –40°C to +85°C. Input common-mode range extends to within 1.3 V of either rail, and output swing reaches ±3.35 V into 100 Ω in the DBV package.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Small-signal BW (G = 1) | 600 MHz - enables full-spectrum fidelity for ≤300 MHz analog signals without gain peaking or instability |
| Gain-bandwidth product | 250 MHz - defines maximum stable closed-loop bandwidth achievable at higher gains (e.g., 25 MHz at G = 10) |
| Slew rate | 750 V/µs - supports clean 2 VPP large-signal reproduction up to 200 MHz without slewing distortion |
| Input offset voltage | ±250 µV (max) - ensures <0.025% gain error in 10 V full-scale precision DAQ channels |
| Input voltage noise | 5.3 nV/√Hz - preserves SNR in high-Z transimpedance stages with ≥1 MΩ feedback resistors |
| Supply current | 16 mA - balances speed and power in thermally constrained SOT-23-5 portable instrumentation |
| Input bias current | ±2 pA (typ) - minimizes DC error in high-impedance sensor interfaces and photodiode TIAs |
Pinout & Package
The OPA814DBVR is housed in a 5-pin SOT-23 (DBV) package measuring 2.9 mm × 2.8 mm, optimized for high-density PCB layouts in portable test gear and optical modules.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (OUT) | Amplifier output | Low-impedance voltage source capable of sourcing/sinking 52 mA linearly; requires isolation resistor for capacitive loads >10 pF |
| 2 (VS−) | Negative supply | Reference for internal biasing; must be connected to ground or negative rail; decoupling capacitor required near pin |
| 3 (IN+) | Noninverting input | High-impedance (1000 GΩ || 0.2 pF) node; sensitive to layout parasitics; guard ring recommended |
| 4 (IN−) | Inverting input | High-impedance (12 GΩ || 2.5 pF) node; feedback network connects here; matched trace length critical for AC performance |
| 5 (VS+) | Positive supply | Reference for internal biasing; must be connected to positive rail; decoupling capacitor required near pin |
Key Features
| Feature | Design Value |
|---|---|
| FET-input architecture | Enables 2 pA input bias current and 5.3 nV/√Hz noise - essential for high-Z photodiode and piezoelectric sensor interfaces |
| Unity-gain stability | Guarantees stable operation without external compensation at G = 1 V/V - simplifies buffer design in oscilloscope probe paths |
| 600-MHz small-signal BW | Preserves rise time <0.58 ns for 10–90% transitions - meets timing integrity requirements in 1+ GSPS data acquisition front-ends |
| ±250 µV max VOS | Reduces calibration overhead in factory-trimmed medical analyzers where offset drift must stay below 3.5 µV/°C |
| 750 V/µs slew rate | Supports distortion-free 2 VPP output at 200 MHz - critical for active probe linearity and OTDR pulse fidelity |
Applications
| High-Speed Data Acquisition | Active Oscilloscope Probes |
|---|---|
Use Scenario: Front-end buffer for 12-bit, 1-GSPS ADCs sampling RF and baseband waveforms in portable spectrum analyzers. IC Role / Device Role / Timing Role: High-input-impedance, low-noise, unity-gain buffer isolating ADC input from source impedance variations while preserving signal integrity up to 300 MHz. Use Value: 600 MHz bandwidth and 5.3 nV/√Hz noise enable >70 dB SNR at 100 MHz input - exceeding ENOB requirements for 12-bit conversion. |
Use Scenario: Input stage of 10× passive/active oscilloscope probes handling 500 MHz signals with minimal loading. IC Role / Device Role / Timing Role: High-Z (1 MΩ || 12 pF) buffer with ultra-low capacitance and 750 V/µs slew rate to maintain probe rise time and flat frequency response. Use Value: 2 pA input bias current prevents DC drift during long acquisitions; 600 MHz BW ensures ≤0.5 dB flatness to 500 MHz. |
| Optical Communication Modules | Medical Analyzers |
Use Scenario: Transimpedance amplifier (TIA) in 2.5 Gbps optical receiver front-ends using PIN photodiodes. IC Role / Device Role / Timing Role: Low-noise, high-speed TIA converting photocurrent to voltage with minimal added jitter and thermal noise. Use Value: 5.3 nV/√Hz input voltage noise and 2 pA bias current maximize dynamic range for weak optical signals - supporting -28 dBm sensitivity. |
Use Scenario: Signal conditioning stage in portable blood gas or chromatography analyzers requiring precise, low-drift amplification of microvolt-level sensor outputs. IC Role / Device Role / Timing Role: Precision gain stage with ±250 µV offset and ±3.5 µV/°C drift - maintaining accuracy over clinical operating temperature ranges. Use Value: Sub-microvolt drift and 250 MHz GBW allow real-time amplification of fast electrochemical transients without calibration drift between samples. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed, precision op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA817DBVR | Higher GBW (400 MHz) and slew rate (1000 V/µs), but 4.5 nV/√Hz noise and ±100 µV max VOS - tighter DC spec but less precision-critical | Better suited for >500 MHz small-signal amplification where noise floor is secondary to bandwidth | Select OPA817DBVR when prioritizing raw speed over sub-250 µV offset in RF signal chains |
| OPA656U | SOIC-8 package, 230 MHz GBW, 290 V/µs slew rate, 7 nV/√Hz noise, ±250 µV VOS - lower speed, higher noise, same precision | Preferred for board-level designs where thermal dissipation and layout simplicity outweigh miniaturization needs | Choose OPA656U for legacy SOIC-based test fixtures needing proven reliability and easier hand-soldering |
Compared with OPA814DBVR, OPA817DBVR trades precision for higher bandwidth and slew rate, while OPA656U offers identical offset performance in a larger package with reduced speed - making OPA814DBVR the optimal balance of GHz-class BW, pA bias, and µV-level DC accuracy in SOT-23.
Availability
OPA814DBVR is available at Aetrix Electronics and suitable for high-speed data acquisition, optical communication modules, and portable medical analyzers requiring stable component supply, consistent parametric performance, and long-term industrial lifecycle support.
Supply support for OPA814DBVR 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
Texas Instruments is a global semiconductor leader delivering analog and embedded processing solutions, with deep expertise in high-performance op amps, data converters, and signal chain ICs.
The OPA814 belongs to TI's high-speed precision op amp portfolio, engineered specifically for applications demanding simultaneous GHz bandwidth, sub-microvolt offset, and FET-input low-noise performance in compact packages.
FAQ
What is the maximum supply voltage for the OPA814DBVR?
The OPA814DBVR supports a total supply voltage range of 6 V to 12.6 V (±3 V to ±6.3 V). Exceeding 12.6 V risks permanent damage per absolute maximum ratings. Operation at 12 V enables ±4.5 V output swing into 100 Ω, maximizing dynamic range in high-voltage DAQ systems - a key capability confirmed in the OPA814DBVR datasheet Section 6.3.
Does the OPA814DBVR require external compensation for unity-gain stability?
No, the OPA814DBVR is internally compensated for unity-gain stability. Its open-loop response provides >65° phase margin at G = 1 V/V, verified by Bode plot analysis in Figure 7-4 of the OPA814DBVR datasheet. This eliminates need for external capacitors in buffer configurations - simplifying layout in active probe and oscilloscope front-end designs.
What is the input bias current specification for the OPA814DBVR at 85°C?
The OPA814DBVR specifies ±1000 pA maximum input bias current over the full –40°C to +85°C industrial temperature range (Section 6.5, Electrical Characteristics). At 25°C, typical bias is ±2 pA - confirming its suitability for high-impedance photodiode TIAs where leakage must remain negligible across operating conditions.
Can the OPA814DBVR drive a 50-Ω load directly?
Yes, the OPA814DBVR delivers ±3.35 V output swing into 100 Ω (Section 6.5), implying robust drive capability into 50 Ω with minor reduction. Its linear output current is rated at 52–70 mA (sourcing/sinking), sufficient for 50-Ω loads up to ±1.75 V. For full 2 VPP into 50 Ω, use a series 25-Ω resistor to match and isolate - as validated in Figure 8-1 of the OPA814DBVR datasheet.
How does the OPA814DBVR compare to the OPA656 in terms of bandwidth and noise?
The OPA814DBVR offers 600 MHz small-signal bandwidth (vs. OPA656's 500 MHz) and 250 MHz GBW (vs. 230 MHz), with lower input voltage noise (5.3 nV/√Hz vs. 7 nV/√Hz). Both share ±250 µV max VOS, but OPA814DBVR achieves this in SOT-23 with 750 V/µs slew rate - making it a direct performance upgrade for space-constrained, noise-sensitive applications per TI's official comparison table.
OPA814DBVR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Standard
- Number of Circuits:
- 1
- Output Type:
- Single-Ended
- Slew Rate:
- 750V/µs
- Gain Bandwidth Product:
- 250 MHz
- -3db Bandwidth:
- 25 MHz
- Current - Input Bias:
- 2 pA
- Voltage - Input Offset:
- 50 µV
- Current - Supply:
- 16mA
- Current - Output / Channel:
- 90 mA
- Voltage - Supply Span (Min):
- 6 V
- Voltage - Supply Span (Max):
- 12.6 V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
OPA814DBVR FAQ
1.How can I place an order for OPA814DBVR through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA814DBVR 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 OPA814DBVR reliable?
The price and inventory of OPA814DBVR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA814DBVR is usually 5 days.
3.What payment methods are accepted for OPA814DBVR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA814DBVR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA814DBVR?
OPA814DBVR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA814DBVR 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 OPA814DBVR?
For technical support, including OPA814DBVR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA814DBVR requirements.
6.How does Aetrix verify that OPA814DBVR is sourced from the original manufacturer or authorized distributors?
All OPA814DBVR 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 OPA814DBVR meets industry standards.
7.What is the process for return or replacement of OPA814DBVR?
All OPA814DBVR units undergo pre-shipment inspection (PSI). If there is an issue with OPA814DBVR, 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 OPA814DBVR part is unused and in its original packaging.
Return procedure for OPA814DBVR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
OPA814DBVR Tags
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