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Texas Instruments OPA842IDBVRG4
- Part No.:
- OPA842IDBVRG4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SC-74A, SOT-753
- Datasheet:
-
OPA842IDBVRG4.pdf
- Description:
- IC OPAMP VFB 1 CIRCUIT SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,153
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Product details
Overview
OPA842IDBVRG4 from Texas Instruments is a unity-gain stable, voltage-feedback operational amplifier optimized for high-speed, low-distortion signal conditioning. It delivers 400MHz unity-gain bandwidth, 2.6nV/√Hz input voltage noise, –93dBc third-harmonic distortion at 5MHz, and 22ns 0.01% settling time - enabling precision buffering of 14-bit, 10MSPS ADCs like the ADS850 in professional video and test instrumentation.
For engineers reviewing the OPA842IDBVRG4 datasheet, OPA842IDBVRG4 pinout, OPA842IDBVRG4 application, or OPA842IDBVRG4 equivalent, key selection criteria include its SOT-23-5 package compatibility with space-constrained layouts, ±5V supply operation, differential gain/phase error of 0.003%/0.008°, and verified performance driving capacitive loads up to 100pF with external series isolation.
Technical Context
The OPA842IDBVRG4 employs a two-stage voltage-feedback architecture that achieves unity-gain stability without external compensation while maintaining 200MHz gain-bandwidth product and 110dB open-loop gain. Its low 2.6nV/√Hz voltage noise and 2.7pA/√Hz current noise support high dynamic range across wideband applications.
It features rail-to-rail output swing capability (±2.8V into 100Ω), 100mA output drive, and robust thermal design with 150°C/W junction-to-ambient thermal resistance in the SOT-23-5 package - making it suitable for continuous high-frequency operation in compact analog front-ends.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Unity-Gain Bandwidth | 400MHz - enables stable G=1 configurations for wideband signal routing without peaking or oscillation. |
| Gain-Bandwidth Product | 200MHz - defines maximum closed-loop bandwidth achievable at higher gains (e.g., ~40MHz at G=–8). |
| Input Voltage Noise | 2.6nV/√Hz - ensures minimal added noise when amplifying low-level signals in high-resolution data acquisition. |
| Harmonic Distortion | –93dBc (3rd harmonic, 5MHz, 2VPP) - preserves signal fidelity in professional audio and imaging systems. |
| Settling Time | 22ns to 0.01% - meets timing requirements for 10MSPS ADC interfaces with 14-bit accuracy. |
| Differential Gain/Phase | 0.003%/0.008° - satisfies broadcast-grade NTSC video line driving specifications. |
| Supply Voltage Range | ±3.5V to ±6V - supports flexible system-level power architecture including ±5V standard rails. |
Pinout & Package
SOT-23-5 package (DBV) with exposed pad for thermal enhancement; 5-pin surface-mount configuration optimized for high-frequency layout and minimal parasitic inductance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN–) | Inverting Input | Differential input node; requires matched impedance for bias current cancellation in precision circuits. |
| 2 (IN+) | Noninverting Input | Differential input node; DC path must be maintained (e.g., via 147Ω resistor to ground in inverting config). |
| 3 (OUT) | Output | Capable of ±100mA sourcing/sinking; requires series isolation resistor when driving >10pF capacitive loads. |
| 4 (–VS) | Negative Supply | Connect to clean –5V rail with local 0.1μF decoupling; critical for PSRR and distortion performance. |
| 5 (+VS) | Positive Supply | Connect to clean +5V rail with local 0.1μF decoupling; decoupling placement directly impacts 400MHz bandwidth stability. |
Key Features
| Feature | Design Value |
|---|---|
| Unity-Gain Stability | No external compensation required - simplifies layout and reduces BOM count in G=1 buffer designs. |
| Low Distortion Architecture | –93dBc 3rd harmonic at 5MHz enables SFDR-critical ADC driver applications without degrading converter performance. |
| High Output Drive | ±100mA output current supports direct driving of 50Ω/75Ω transmission lines and heavy capacitive loads. |
| Professional Video Performance | 0.003%/0.008° differential gain/phase meets SMPTE/NTSC broadcast standards for composite video distribution. |
| Thermal Robustness | 150°C/W θJA in SOT-23-5 allows sustained operation at full bandwidth under industrial ambient conditions. |
Applications
| ADC Buffering | Video Line Driving |
|---|---|
Use Scenario: Driving the analog input of a 14-bit, 10MSPS SAR ADC (e.g., ADS850) in an automated test equipment system. IC Role / Device Role / Timing Role: Precision voltage buffer providing fast settling, low noise, and high SFDR to preserve ADC ENOB. Use Value: 22ns 0.01% settling ensures accurate sampling window alignment; 2.6nV/√Hz noise avoids SNR degradation in 82dB SFDR converter interface. | Use Scenario: Amplifying and distributing NTSC composite video signals across multiple 75Ω coaxial cables in broadcast monitoring gear. IC Role / Device Role / Timing Role: Unity-gain stable line driver delivering flat frequency response up to 5.5MHz with minimal color distortion. Use Value: 0.003%/0.008° differential gain/phase error maintains chroma fidelity; ±2.8V swing into 75Ω sustains signal integrity over long cable runs. |
| Low-Distortion IF Amplifier | Active Filter Configuration |
Use Scenario: Intermediate-frequency amplification in software-defined radio receivers operating at 5–20MHz. IC Role / Device Role / Timing Role: High-linearity gain stage preserving modulation integrity in QAM/QPSK signal paths. Use Value: –93dBc 3rd harmonic at 5MHz and 44dBm IP3 prevent adjacent-channel interference; 400MHz GBW supports multi-octave tuning. | Use Scenario: Implementing a 5th-order Chebyshev low-pass filter with 20MHz cutoff in medical ultrasound beamforming. IC Role / Device Role / Timing Role: Active filter integrator and gain block requiring wide bandwidth and low phase shift nonlinearity. Use Value: 110dB open-loop gain ensures precise pole placement; 2.6nV/√Hz noise prevents baseline drift in sensitive echo detection. |
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 |
|---|---|---|---|
| OPA843IDBVR | Lower 2.0nV/√Hz noise, 800MHz GBP, but not unity-gain stable - requires minimum G=+5. | Preferred for G≥5 video gain stages or ultra-low-noise IF amplifiers where stability margin permits. | Select OPA843IDBVR only when gain ≥5 is acceptable and lower noise justifies reduced flexibility. |
| OPA642U | Same SOT-23-5 package, 350MHz GBP, 3.1nV/√Hz noise, unity-gain stable - legacy TI part with broader temp range (–40°C to +125°C). | Better suited for automotive or extended-temperature industrial control where OPA842IDBVRG4's +85°C max is insufficient. | Choose OPA642U when extended temperature operation is mandatory and 350MHz bandwidth suffices. |
Compared with OPA842IDBVRG4, OPA843IDBVR offers superior noise and bandwidth but sacrifices unity-gain stability, while OPA642U trades 50MHz bandwidth and higher noise for extended temperature capability - making OPA842IDBVRG4 the optimal balance for 400MHz, unity-gain, industrial-grade video and ADC buffering.
Availability
OPA842IDBVRG4 is available at Aetrix Electronics and suitable for high-speed ADC buffering, professional video line driving, low-distortion IF amplification, and active filter design requiring stable, low-noise, wideband signal conditioning.
Supply support for OPA842IDBVRG4 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 specializing in analog and embedded processing technologies, with decades of expertise in high-performance op amps and data converters.
The OPA842IDBVRG4 belongs to TI's OPAx84x high-speed voltage-feedback op amp family, engineered specifically for demanding applications requiring unity-gain stability, ultra-low distortion, and precision DC performance in compact packages.
FAQ
What is the maximum capacitive load the OPA842IDBVRG4 can drive without instability?
The OPA842IDBVRG4 requires external series isolation (e.g., 20–50Ω) when driving >10pF capacitive loads. As shown in Figure 15 of the SBOS267D datasheet, stable operation up to 100pF is achievable with proper RS selection - but direct connection to >10pF loads risks peaking or oscillation due to phase margin erosion. Always verify stability with actual PCB layout and load capacitance.
Does the OPA842IDBVRG4 support single-supply operation?
No - the OPA842IDBVRG4 is specified only for dual-supply operation from ±3.5V to ±6V. Its input common-mode range extends to ±3.2V and output swing reaches ±2.8V into 100Ω with ±5V supplies. Single-supply use is not characterized or guaranteed; for rail-to-rail input/output single-supply applications, consider TI's OPA355 or OPA837 families instead.
How does the OPA842IDBVRG4 compare to the OPA642 in ADC driver applications?
The OPA842IDBVRG4 provides 400MHz unity-gain bandwidth vs. OPA642's 350MHz, 2.6nV/√Hz vs. 3.1nV/√Hz input noise, and superior 0.01% settling (22ns vs. 25ns). Both are unity-gain stable and pin-compatible in SOT-23-5, but OPA842IDBVRG4 delivers higher SFDR headroom for 14-bit, 10MSPS ADCs like the ADS850 - especially critical in test instrumentation where dynamic range is paramount.
Is the OPA842IDBVRG4 suitable for driving 75Ω video cables?
Yes - the OPA842IDBVRG4 is explicitly characterized for 75Ω video line driving per Figure 26 (differential gain/phase) and Application Note section "Video Line Driving". With G=+2 configuration and 75Ω series termination, it delivers 0.003%/0.008° NTSC performance and ±2.8V swing into 75Ω - meeting broadcast-grade requirements for SD/HD composite video distribution systems.
What thermal considerations apply to the OPA842IDBVRG4 in continuous high-frequency operation?
The OPA842IDBVRG4 has a thermal resistance of 150°C/W (θJA) in the SOT-23-5 package. At ±5V supply and 20.2mA quiescent current, power dissipation is ~202mW - resulting in ~30°C junction rise above ambient. For reliable continuous operation at full 400MHz bandwidth, ensure PCB copper area under the exposed pad and maintain ambient ≤+70°C; derate output current above +85°C case temperature per datasheet limits.
OPA842IDBVRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Amplifier Type:
- Voltage Feedback
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 400V/µs
- Gain Bandwidth Product:
- 200 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 20 µA
- Voltage - Input Offset:
- 300 µV
- Current - Supply:
- 20.2mA
- Current - Output / Channel:
- 100 mA
- Voltage - Supply Span (Min):
- 10 V
- Voltage - Supply Span (Max):
- 12 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
OPA842IDBVRG4 FAQ
1.How can I place an order for OPA842IDBVRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA842IDBVRG4 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 OPA842IDBVRG4 reliable?
The price and inventory of OPA842IDBVRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA842IDBVRG4 is usually 5 days.
3.What payment methods are accepted for OPA842IDBVRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA842IDBVRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA842IDBVRG4?
OPA842IDBVRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA842IDBVRG4 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 OPA842IDBVRG4?
For technical support, including OPA842IDBVRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA842IDBVRG4 requirements.
6.How does Aetrix verify that OPA842IDBVRG4 is sourced from the original manufacturer or authorized distributors?
All OPA842IDBVRG4 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 OPA842IDBVRG4 meets industry standards.
7.What is the process for return or replacement of OPA842IDBVRG4?
All OPA842IDBVRG4 units undergo pre-shipment inspection (PSI). If there is an issue with OPA842IDBVRG4, 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 OPA842IDBVRG4 part is unused and in its original packaging.
Return procedure for OPA842IDBVRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
OPA842IDBVRG4 Tags
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