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Texas Instruments OPA842IDBVR
- Part No.:
- OPA842IDBVR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SC-74A, SOT-753
- Datasheet:
-
OPA842IDBVR.pdf
- Description:
- IC OPAMP VFB 1 CIRCUIT SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,011
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Product details
Overview
OPA842IDBVR 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 OPA842IDBVR datasheet, OPA842IDBVR pinout, OPA842IDBVR application, or OPA842IDBVR equivalent, this page provides verified specifications, SOT-23-5 package details, differential receiver design guidance, and validated alternative options for high-dynamic-range analog front-ends.
Technical Context
The OPA842IDBVR 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 differential input stage enables precise bias current cancellation and supports dc-coupled configurations with matched impedance networks.
It operates from ±3.5V to ±6V supplies, draws 20.2mA quiescent current, and drives 100Ω loads to ±2.6V swing. The device features 95dB CMRR and 100dB PSRR at DC, with harmonic distortion performance validated up to 5MHz under 2VPP conditions and 150Ω loads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Unity-Gain Bandwidth | 400MHz - enables stable operation at G = +1 with flat frequency response up to 105MHz (0.1dB gain flatness). |
| Input Voltage Noise | 2.6nV/√Hz - ensures minimal contribution to system noise floor in low-amplitude, wideband signal chains. |
| Harmonic Distortion | –93dBc (3rd harmonic, 5MHz, 2VPP, RL = 500Ω) - preserves SFDR integrity when driving high-resolution ADCs. |
| Settling Time | 22ns to 0.01% - meets timing budget for 10MSPS sampling with 14-bit accuracy in pipeline or SAR converters. |
| Open-Loop Gain | 110dB - supports high-precision closed-loop gain accuracy and low dc error in sensor interfaces. |
| Supply Voltage Range | ±3.5V to ±6V - compatible with standard ±5V rails and allows margin for transient headroom. |
| Quiescent Current | 20.2mA - balances speed and power in space-constrained, high-channel-count systems. |
Pinout & Package
SOT-23-5 package (DBV), 5-pin surface-mount, 1.6mm × 2.9mm footprint, 1.0mm height, thermal resistance θJA = 150°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (IN–) | Inverting Input | Differential input node; requires matched impedance to noninverting input for optimal CMRR and bias current cancellation. |
| 2 (IN+) | Noninverting Input | Differential input node; dc path must be established (e.g., via 147Ω to ground in ac-coupled ADC buffer) to set common-mode operating point. |
| 3 (OUT) | Output | Capable of sourcing/sinking ±100mA; requires series isolation resistor (e.g., 50Ω) when driving capacitive ADC inputs to prevent peaking. |
| 4 (–VS) | Negative Supply | Connect to clean –5V rail with local 0.1µF ceramic decoupling; essential for low-distortion ac performance. |
| 5 (+VS) | Positive Supply | Connect to clean +5V rail with local 0.1µF ceramic decoupling; decoupling must be placed within 2mm of pin. |
Key Features
| Feature | Design Value |
|---|---|
| Unity-gain stability | Eliminates need for external compensation components in G = +1 to +2 configurations, reducing BOM count and layout complexity. |
| Professional video differential gain/phase | 0.003%/0.008° at NTSC 3.58MHz - meets broadcast-grade line driver requirements without post-correction. |
| High output drive capability | ±100mA output current into 1kΩ load - supports direct driving of 75Ω video cables or 100Ω ADC termination networks. |
| Low input offset drift | ±4µV/°C - maintains dc accuracy over industrial temperature range (–40°C to +85°C) in precision sensor amplifiers. |
| ESD-protected I/O | HBM 2000V, CDM 1500V - reduces handling sensitivity and improves manufacturing yield in automated assembly. |
Applications
| ADC Buffering | Video Line Driving |
|---|---|
Use Scenario: Interface between analog sensor front-end and 14-bit, 10MSPS ADS850 ADC in test equipment. IC Role / Device Role / Timing Role: Single-ended-to-differential driver with 22ns settling time ensuring full-scale accuracy at maximum sample rate. Use Value: 92dB SFDR at 5MHz prevents amplifier from degrading converter's dynamic range; ac-coupled topology avoids reference-level shift errors. | Use Scenario: Distribution of composite NTSC video signals across 75Ω coaxial cable in broadcast monitoring systems. IC Role / Device Role / Timing Role: Gain-of-2 line driver compensating for 6dB loss in matched source/load configuration. Use Value: 0.003%/0.008° differential gain/phase error preserves color fidelity without external calibration circuitry. |
| Differential Receiver | Active Filter Stage |
Use Scenario: Receiving balanced audio or instrumentation signals in EMI-prone industrial environments. IC Role / Device Role / Timing Role: High-CMRR (95dB) single-op-amp differential amplifier rejecting common-mode noise on twisted-pair lines. Use Value: 147Ω resistor on noninverting input cancels bias current error, enabling true dc-coupled differential operation. | Use Scenario: 5th-order low-pass filter stage in ultrasound receive chain requiring <1% passband ripple to 10MHz. IC Role / Device Role / Timing Role: Unity-gain stable, low-noise gain block in multiple-feedback (MFB) topology with 400MHz GBW headroom. Use Value: 2.6nV/√Hz input noise minimizes integrated noise in filter passband; 110dB AOL ensures accurate pole placement. |
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 input noise (2.0nV/√Hz), higher GBP (800MHz), but not unity-gain stable - requires minimum G = +5. | Better SNR in low-noise preamp stages; unsuitable for G = +1 ADC buffers or video drivers. | Select OPA843IDBVR only when gain ≥ +5 is acceptable and noise dominates distortion budget. |
| OPA642U | SO-8 package, unity-gain stable, 2.1nV/√Hz noise, 400MHz GBW - same core performance, larger footprint. | Preferred where board space permits and thermal management favors SO-8 over SOT-23-5. | Choose OPA642U for legacy designs using SO-8 footprints or when higher θJA margin (125°C/W) is required. |
Compared with OPA842IDBVR, OPA843IDBVR trades unity-gain stability for lower noise and higher bandwidth - making it ideal for fixed-gain IF amplifiers but incompatible with direct ADC buffering. OPA642U matches key specs but uses SO-8 packaging, offering better thermal performance at the cost of board area.
Availability
OPA842IDBVR is available at Aetrix Electronics and suitable for high-speed data acquisition, professional video infrastructure, test instrumentation, and medical imaging systems requiring stable component supply and guaranteed long-term availability.
Supply support for OPA842IDBVR 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 signal chain design.
The OPA842IDBVR belongs to TI's Precision High-Speed Amplifier product line, engineered specifically for applications demanding simultaneous wide bandwidth, ultra-low distortion, and dc precision - such as 14-bit+ data converters and broadcast video systems.
FAQ
What is the maximum capacitive load the OPA842IDBVR can drive without instability?
The OPA842IDBVR requires a series isolation resistor (RS) when driving capacitive loads >10pF. Per Figure 15 in the SBOS267D datasheet, RS = 50Ω supports up to 100pF; RS = 100Ω supports up to 47pF. For ADC input capacitance (e.g., ADS850), a 50Ω RS with 0.1µF shunt capacitor is recommended to maintain flat 0–10MHz response without peaking. This RC network must be placed directly at the OPA842IDBVR output pin.
Does the OPA842IDBVR support single-supply operation?
No - the OPA842IDBVR is specified only for dual-supply operation from ±3.5V to ±6V. Its input common-mode range extends to ±3.2V with ±5V supplies, and output swing is asymmetric (±2.6V into 100Ω). It lacks rail-to-rail input/output capability and has no internal level-shifting circuitry. For single-supply designs, consider TI's OPA837 or OPA836, which are explicitly characterized for 2.7V to 5.4V operation.
How does the OPA842IDBVR achieve unity-gain stability with 400MHz bandwidth?
The OPA842IDBVR achieves unity-gain stability through proprietary two-stage voltage-feedback architecture with internal dominant-pole compensation. Unlike current-feedback op amps, it maintains phase margin >60° at G = +1 by optimizing internal gain distribution and frequency compensation - enabling 400MHz unity-gain bandwidth without external components. This is confirmed by measured 105MHz 0.1dB gain flatness and stable pulse response in Figure 5 of SBOS267D.
Can the OPA842IDBVR replace the OPA642 in existing designs?
Yes - the OPA842IDBVR is a direct functional upgrade to the OPA642, offering identical unity-gain stability, improved distortion (–93dBc vs –88dBc at 5MHz), lower noise (2.6nV/√Hz vs 2.1nV/√Hz), and faster settling (22ns vs 25ns). However, the SOT-23-5 (DBV) package differs from OPA642's SO-8 (D), requiring PCB redesign. Pin functions match (IN–, IN+, OUT, –VS, +VS), but DBV has no NC pins. Thermal design must account for higher θJA (150°C/W vs 125°C/W).
What layout practices are critical for achieving –93dBc distortion with the OPA842IDBVR?
To achieve –93dBc distortion, use symmetric 50Ω microstrip routing for both inputs, place 0.1µF X7R ceramic decoupling caps ≤2mm from each supply pin, ground the noninverting input via a 147Ω resistor (for ac-coupled ADC buffers), and isolate the output with a 50Ω series resistor before any capacitive load. Avoid vias in signal paths, use solid ground plane, and separate analog/digital grounds at single-point connection. These practices are validated in Figure 37 and layout guidelines of SBOS267D.
OPA842IDBVR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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
OPA842IDBVR FAQ
1.How can I place an order for OPA842IDBVR through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA842IDBVR 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 OPA842IDBVR reliable?
The price and inventory of OPA842IDBVR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA842IDBVR is usually 5 days.
3.What payment methods are accepted for OPA842IDBVR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA842IDBVR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA842IDBVR?
OPA842IDBVR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA842IDBVR 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 OPA842IDBVR?
For technical support, including OPA842IDBVR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA842IDBVR requirements.
6.How does Aetrix verify that OPA842IDBVR is sourced from the original manufacturer or authorized distributors?
All OPA842IDBVR 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 OPA842IDBVR meets industry standards.
7.What is the process for return or replacement of OPA842IDBVR?
All OPA842IDBVR units undergo pre-shipment inspection (PSI). If there is an issue with OPA842IDBVR, 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 OPA842IDBVR part is unused and in its original packaging.
Return procedure for OPA842IDBVR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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