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Texas Instruments OPA843IDBVR
- Part No.:
- OPA843IDBVR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SC-74A, SOT-753
- Datasheet:
-
OPA843IDBVR.pdf
- Description:
- IC OPAMP VFB 1 CIRCUIT SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,352
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Product details
Overview
OPA843IDBVR from Texas Instruments is a wideband, low-distortion, medium-gain voltage-feedback operational amplifier in SOT-23-5 package. It delivers 260MHz small-signal bandwidth at G = +5, 800MHz gain-bandwidth product, –96dBc 3rd-harmonic distortion at 5MHz, and 2.0nV/√Hz input voltage noise - enabling high-fidelity ADC/DAC buffering and wideband transimpedance amplification in space-constrained instrumentation.
For engineers reviewing the OPA843IDBVR datasheet, OPA843IDBVR pinout, OPA843IDBVR application, or OPA843IDBVR equivalent, key selection criteria include its 10.5ns 0.01% settling time, ±100mA output drive, ±5V operation, and validated performance in differential IF amplifier and photodiode receiver configurations per TI SBOS268C.
Technical Context
The OPA843IDBVR uses a two-stage voltage-feedback architecture optimized for simultaneous high DC precision and RF-grade AC performance. Its classic differential input stage achieves 110dB open-loop gain, 95dB CMRR, and 100dB PSRR while maintaining 300µV max input offset voltage - enabling accurate DC-coupled signal conditioning without sacrificing 260MHz bandwidth.
It supports stable operation with external compensation networks (e.g., RG tuning for peaking control), exhibits <1.2ns rise/fall time, and maintains <0.01° differential phase error in video applications. The device is explicitly characterized for 50Ω source/load matching in both inverting (G = –8) and noninverting (G = +5) configurations per Figure 1 and Figure 2 of SBOS268C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Bandwidth Product | 800MHz min - enables stable closed-loop designs up to G = +20 with usable bandwidth >30MHz. |
| Small-Signal Bandwidth (G = +5) | 260MHz min - supports baseband signal integrity through UHF frequencies in IF and test equipment. |
| Input Voltage Noise | 2.0nV/√Hz max above 1MHz - critical for low-noise photodiode transimpedance and receiver front-ends. |
| Harmonic Distortion (5MHz) | –96dBc 3rd-harmonic max at RL = 500Ω - ensures >80dBc SFDR in differential 4VPP outputs up to 20MHz. |
| Settling Time (0.01%) | 10.5ns typ for 2V step - meets timing budget for 12-bit ADC drivers requiring sub-100ns acquisition windows. |
| Output Current Drive | ±100mA min into RL > 1kΩ - sustains full swing into moderate loads without clipping in active filter and summing applications. |
| Supply Voltage Range | ±4V to ±6V min/max - compatible with standard ±5V industrial and test instrumentation rails. |
Pinout & Package
SOT-23-5 package (DBV), 5-pin surface-mount, 1.6mm × 2.9mm footprint, thermal resistance θJA = 150°C/W. Pin 1 marked by dot; pin orientation matches TI standard SOT-23 top view.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Inverting Input (–) | High-impedance node for feedback network connection; requires matched 50Ω termination in RF applications. |
| 2 | Noninverting Input (+) | DC-biased reference point; common-mode range extends to ±3.2V with ±5V supplies. |
| 3 | Output | Capable of ±100mA sourcing/sinking; closed-loop output impedance <0.0001Ω at 1kHz. |
| 4 | –VS | Negative supply rail; must be decoupled with 0.1µF ceramic + 2.2µF tantalum per TI layout guidelines. |
| 5 | +VS | Positive supply rail; same decoupling requirement as –VS; total quiescent current 20.2–22.5mA. |
Key Features
| Feature | Design Value |
|---|---|
| Wideband low-distortion operation | –96dBc 3rd-harmonic at 5MHz enables >80dBc SFDR in differential IF amplifiers up to 20MHz. |
| High DC precision | 110dB open-loop gain + 300µV max VOS allows DC-coupled gain stages without trimming in 12–14-bit data acquisition. |
| Fast settling & slew rate | 10.5ns to 0.01% + 1000V/µs min slew rate supports high-speed pulse and video signal fidelity. |
| Optimized for 50Ω systems | Validated performance with 50Ω source/load matching in both inverting (G = –8) and noninverting (G = +5) configurations. |
| Differential configuration support | Two OPA843IDBVR units deliver <–100dBc 3rd-harmonic distortion at 4VPP output swing per front-page application circuit. |
Applications
| ADC/DAC Buffer Amplifier | Low-Distortion IF Amplifier |
|---|---|
Use Scenario: Driving 14-bit SAR or pipeline ADCs with 5MHz input bandwidth and <0.01% linearity error. IC Role / Device Role / Timing Role: High-speed, low-noise buffer isolating ADC input from source impedance variations while preserving SNR. Use Value: 2.0nV/√Hz input noise and 10.5ns settling ensure >78dB ENOB at 5MHz; differential implementation extends SFDR beyond 93dB. |
Use Scenario: Fixed-gain IF stage in narrowband receivers operating near 44MHz with <33dBm 3rd-order intercept. IC Role / Device Role / Timing Role: Wide-dynamic-range voltage amplifier providing gain accuracy, reverse isolation, and low I/O return loss. Use Value: >30dBm 3rd-order intercept up to 50MHz and >50dBm below 10MHz at only 200mW quiescent power - outperforming fixed-gain alternatives. |
| Photodiode Transimpedance Amplifier | Professional Audio Line Driver |
Use Scenario: Converting low-level photocurrent (nA–µA) from high-capacitance photodiodes into clean voltage signals. IC Role / Device Role / Timing Role: Transimpedance amplifier with externally compensated feedback network for stability across diode capacitance ranges. Use Value: 800MHz GBP + low 2.8pA/√Hz input current noise enables >24MHz –3dB bandwidth with 10kΩ transimpedance gain and Butterworth response. |
Use Scenario: Balanced line driver in studio audio interfaces requiring <0.001% THD+N and 0.012° differential phase. IC Role / Device Role / Timing Role: Low-distortion, high-output-current driver for XLR or AES3 outputs with DC-coupled level control. Use Value: 0.001% differential gain error and 0.012° differential phase error at NTSC video load (150Ω) confirm suitability for high-fidelity analog audio distribution. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar wideband op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA842IDBVR | 2.6nV/√Hz input noise, 200MHz GBW, –85dBc 3rd-harmonic at 5MHz - lower speed and higher noise than OPA843IDBVR. | Targeted at cost-sensitive 10–20MHz IF and active filter applications where 260MHz bandwidth is unnecessary. | Select when 200MHz bandwidth suffices and lower quiescent current (18mA) is prioritized over ultimate distortion performance. |
| OPA847IDBVR | 0.85nV/√Hz input noise, 3900MHz GBW, –102dBc 3rd-harmonic at 5MHz - significantly higher speed and lower noise but higher power (35mA). | Used in ultra-wideband test equipment and optical front-ends requiring >1GHz closed-loop bandwidth. | Select when >1GHz signal chain bandwidth is required and 35mA supply current is acceptable; not drop-in due to different biasing and layout needs. |
Compared with OPA842IDBVR, the OPA843IDBVR offers 60MHz more bandwidth and 11dB better harmonic distortion at 5MHz; compared with OPA847IDBVR, it consumes 40% less power while delivering sufficient performance for 12-bit ADC buffering and 44MHz IF amplification.
Availability
OPA843IDBVR is available at Aetrix Electronics and suitable for ADC/DAC interface design, wideband transimpedance amplification, and professional audio line driving requiring stable component supply and traceable sourcing.
Supply support for OPA843IDBVR 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 precision signal chains.
The OPA843IDBVR belongs to TI's OPA8xx family of wideband voltage-feedback op amps, designed specifically for high-dynamic-range applications including test instrumentation, communications infrastructure, and high-fidelity data acquisition systems.
FAQ
What is the maximum recommended supply voltage for the OPA843IDBVR?
The OPA843IDBVR has an absolute maximum supply rating of ±6.5VDC, but its specified operating range is ±4V to ±6V. For reliable long-term operation with full parameter guarantees, TI recommends using ±5V supplies - the condition under which all AC and DC specifications in SBOS268C are characterized. Exceeding ±6V risks permanent damage per Absolute Maximum Ratings table.
Does the OPA843IDBVR require external compensation for unity-gain stability?
No - the OPA843IDBVR is not unity-gain stable. It is optimized for minimum stable gain of +3 (noninverting) or –1 (inverting). For G = +1 applications, external compensation (e.g., feedback capacitor CF) is mandatory to prevent oscillation. TI provides detailed compensation guidelines in SBOS268C Section "Photodiode Transimpedance Amplifier" and Figure 10.
Can the OPA843IDBVR drive a 50Ω load directly?
Yes - the OPA843IDBVR delivers ±100mA output current and is explicitly characterized driving 50Ω and 100Ω loads in both inverting and noninverting configurations (Figures 1 and 2 of SBOS268C). At ±5V supplies, it sustains ±3.0V output swing into 100Ω and ±2.6V into 50Ω, making it suitable for direct 50Ω-coupled RF and test equipment interfaces.
What is the thermal resistance (θJA) of the OPA843IDBVR in its SOT-23-5 package?
The OPA843IDBVR in the DBV (SOT-23-5) package has a typical junction-to-ambient thermal resistance (θJA) of 150°C/W, as specified in the Thermal Characteristics table of SBOS268C. This value assumes standard JEDEC 2-layer board conditions; actual θJA improves with PCB copper area and thermal vias per TI layout recommendations.
Is the OPA843IDBVR pin-compatible with the OPA643?
No - the OPA843IDBVR (SOT-23-5, 5-pin) is not pin-compatible with the OPA643 (SO-8, 8-pin). While the OPA843IDBVR is positioned as an upgrade path for OPA643-based designs per Applications section, physical replacement requires PCB redesign due to differing pin count, layout, and thermal pad requirements. TI confirms this in SBOS268C footnote "OPA643 UPGRADE".
OPA843IDBVR 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:
- 1000V/µs
- Gain Bandwidth Product:
- 800 MHz
- -3db Bandwidth:
- 500 MHz
- Current - Input Bias:
- 20 µA
- Voltage - Input Offset:
- 300 µV
- Current - Supply:
- 20.2mA
- Current - Output / Channel:
- 100 mA
- Voltage - Supply Span (Min):
- 8 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
OPA843IDBVR FAQ
1.How can I place an order for OPA843IDBVR through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA843IDBVR 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 OPA843IDBVR reliable?
The price and inventory of OPA843IDBVR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA843IDBVR is usually 5 days.
3.What payment methods are accepted for OPA843IDBVR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA843IDBVR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA843IDBVR?
OPA843IDBVR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA843IDBVR 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 OPA843IDBVR?
For technical support, including OPA843IDBVR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA843IDBVR requirements.
6.How does Aetrix verify that OPA843IDBVR is sourced from the original manufacturer or authorized distributors?
All OPA843IDBVR 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 OPA843IDBVR meets industry standards.
7.What is the process for return or replacement of OPA843IDBVR?
All OPA843IDBVR units undergo pre-shipment inspection (PSI). If there is an issue with OPA843IDBVR, 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 OPA843IDBVR part is unused and in its original packaging.
Return procedure for OPA843IDBVR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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