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Texas Instruments OPA843IDBVT
- Part No.:
- OPA843IDBVT
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SC-74A, SOT-753
- Datasheet:
-
OPA843IDBVT.pdf
- Description:
- IC OPAMP VFB 1 CIRCUIT SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:560
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Product details
Overview
OPA843IDBVT 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 and professional audio systems.
For engineers reviewing the OPA843IDBVT datasheet, OPA843IDBVT pinout, OPA843IDBVT application, or OPA843IDBVT equivalent, key selection criteria include its 10.5ns 0.01% settling time, ±100mA output drive, ±5V operating supply, and verified performance in differential IF amplifier and photodiode transimpedance configurations per TI SBOS268C.
Technical Context
The OPA843IDBVT employs a two-stage voltage-feedback architecture optimized for medium gain (G = +3 to +20) with exceptional dynamic range. Its classic differential input stage provides high DC precision - including 110dB open-loop gain, 95dB CMRR, and 300µV max input offset voltage - while maintaining RF-grade AC performance up to 260MHz.
It achieves low distortion via internal compensation and layout-insensitive feedback network design, supporting stable operation with 50Ω source/load terminations. The device is specified for –40°C to +85°C and features 150°C/W θJA in the SOT-23-5 (DBV) package, requiring careful thermal management above 100mA continuous output current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Gain Bandwidth Product | 800MHz - enables stable closed-loop designs up to G = +20 with usable bandwidth >40MHz |
| Small-Signal Bandwidth (G = +5) | 260MHz min - supports high-frequency signal conditioning for IF stages and fast ADC drivers |
| Input Voltage Noise | 2.0nV/√Hz - critical for preserving SNR in low-level sensor and photodiode transimpedance applications |
| Harmonic Distortion (5MHz) | –96dBc (3rd-harmonic, RL = 500Ω) - ensures >80dBc SFDR in differential receiver configurations |
| Settling Time (0.01%) | 10.5ns typ - meets timing budget for 12-bit data acquisition systems sampling at ≥50MSPS |
| Output Current Drive | ±100mA min - drives 100Ω loads directly without external buffers in active filter and line-driver circuits |
| Supply Voltage Range | ±4V to ±6V - compatible with standard ±5V analog rails and supports ±4.5V industrial supplies |
Pinout & Package
SOT-23-5 (DBV) package: 2.9mm × 1.6mm × 1.15mm body, gull-wing leads, moisture sensitivity level 1, rated for –40°C to +85°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Noninverting Input) | Differential input node | High-impedance (3.2MΩ || 1.2pF), referenced to common-mode voltage; requires matched layout for optimal CMRR |
| 2 (Inverting Input) | Differential input node | Low-impedance virtual ground in closed-loop; sets noise gain and stability via feedback network |
| 3 (Output) | Amplified signal source | Capable of ±100mA into 100Ω; closed-loop output impedance <0.0001Ω at 1kHz for low-impedance load driving |
| 4 (–VS) | Negative power supply rail | Must be decoupled with 0.1µF ceramic + 2.2µF tantalum near pin; supports –6.5V absolute max rating |
| 5 (+VS) | Positive power supply rail | Must be decoupled identically to –VS; enables rail-to-rail output swing of ±3.0V into 100Ω at ±5V supply |
Key Features
| Feature | Design Value |
|---|---|
| Wideband low-distortion operation | –96dBc 3rd-harmonic at 5MHz enables >80dBc SFDR in differential IF receivers up to 20MHz |
| High DC precision with speed | 110dB open-loop gain + 300µV offset voltage allows accurate DC-coupled gain stages without trimming |
| Fast settling for high-resolution conversion | 10.5ns to 0.01% supports 12-bit ADC interfaces with minimal acquisition-time overhead |
| Robust output drive capability | ±100mA output sustains 2Vpp signals into 100Ω loads - eliminates need for external buffer in compact instrumentation |
| Optimized for 50Ω system interfacing | Validated performance with 50Ω source/load terminations per Figure 1/2 - simplifies RF and video board layout |
Applications
| ADC/DAC Buffer Amplifier | Low-Distortion "IF" Amplifier |
|---|---|
Use Scenario: Driving 12–14-bit SAR or pipeline ADCs in test equipment and medical imaging front-ends where signal integrity up to 5MHz is required. IC Role / Device Role / Timing Role: High-speed, low-noise buffer isolating ADC input from source impedance variations while maintaining 0.01% settling within 10.5ns. Use Value: Preserves ENOB by limiting harmonic distortion to –96dBc and input-referred noise to 2.0nV/√Hz - directly extending effective resolution. | Use Scenario: Intermediate-frequency amplification in broadband spectrum analyzers and communications receivers operating at 44MHz with narrowband selectivity. IC Role / Device Role / Timing Role: Medium-gain (G = +4 to +10), wide-dynamic-range IF gain block delivering >33dBm 3rd-order intercept at 44MHz. Use Value: Achieves >30dBm intercept up to 50MHz on only 200mW quiescent power - outperforming fixed-gain IF amps in power efficiency and gain accuracy. |
| Wideband Transimpedance | Professional Audio Line Driver |
Use Scenario: Photodiode current-to-voltage conversion in optical time-domain reflectometers (OTDR) and laser pulse detection systems requiring 10–100MHz bandwidth. IC Role / Device Role / Timing Role: Transimpedance amplifier with 800MHz GBP and 2.0nV/√Hz noise floor, configured with CF compensation for Butterworth response. Use Value: Use Value: Enables 24MHz –3dB bandwidth with 0.75pF CF in 10kΩ transimpedance design - balancing speed, stability, and SNR for low-light detection. | Use Scenario: Balanced line driver in digital mixing consoles and broadcast audio interfaces requiring low THD+N and wide slew capability. IC Role / Device Role / Timing Role: Single-ended to differential driver with ±100mA output, used in pairs for fully differential output stages. Use Value: Delivers <0.002% THD+N at 1Vrms into 600Ω with 1000V/µs slew rate - meeting AES17 professional audio fidelity standards. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar wideband op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA842IDBVT | Lower GBW (200MHz), higher input noise (2.6nV/√Hz), same SOT-23-5 package and pinout | Reduced bandwidth limits use in >10MHz IF or fast-settling ADC buffer roles | Select when 200MHz bandwidth suffices and lower cost is prioritized over ultimate distortion/noise performance |
| LMH6629MA/NOPB | Higher GBW (1.5GHz), higher quiescent current (12.5mA vs 20.2mA), SO-8 only, no SOT-23-5 option | Requires PCB redesign due to different package and pinout; better for >50MHz applications but less suitable for space-constrained layouts | Choose for ultra-wideband (>100MHz) transimpedance or RF gain blocks where SOT-23-5 footprint is not mandatory |
Compared with OPA842IDBVT, the OPA843IDBVT offers 60MHz more bandwidth and 0.6nV/√Hz lower noise - critical for 12+ bit ADC interfaces. Versus LMH6629MA/NOPB, it trades 700MHz GBW for proven 260MHz stability in compact SOT-23-5 layouts and lower thermal density in handheld instrumentation.
Availability
OPA843IDBVT is available at Aetrix Electronics and suitable for professional audio line drivers, wideband transimpedance amplifiers, high-speed ADC/DAC buffers, and low-distortion IF amplifier modules requiring stable component supply across production lifecycles.
Supply support for OPA843IDBVT 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 amp design and manufacturing.
The OPA843IDBVT belongs to TI's OPA8xx family of wideband voltage-feedback op amps, engineered specifically for applications demanding simultaneous high speed, low distortion, and DC precision - such as test instrumentation, communications infrastructure, and professional audio signal chains.
FAQ
What is the maximum recommended supply voltage for the OPA843IDBVT?
The OPA843IDBVT 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, Texas Instruments recommends using ±5V supplies - the condition under which all AC and DC specifications in SBOS268C are characterized. Exceeding ±6V risks permanent damage, and operation below ±4V may degrade bandwidth and output swing.
Does the OPA843IDBVT support unity-gain stable operation?
No, the OPA843IDBVT is not unity-gain stable. It is optimized for medium-gain configurations (G ≥ +3) and requires minimum noise gain of 3 for stability. Attempting unity-gain (G = +1) or inverting G = –1 configurations will cause peaking or oscillation. The datasheet explicitly specifies performance from G = +3 to +20 (noninverting) and G = –1 to –32 (inverting), with stability ensured via proper feedback network design per Figures 1 and 2 in SBOS268C.
How does the OPA843IDBVT perform in differential driver configurations?
The OPA843IDBVT excels in differential driver configurations - two units can be paired to deliver very low distortion at high output voltages, as demonstrated in the front-page application circuit of SBOS268C. At GD = 10 and 5MHz, differential distortion reaches –110dBc (3rd-harmonic) into 400Ω, enabling >93dB SFDR at 5MHz for 8Vpp signals. This makes the OPA843IDBVT ideal for high-performance ADC drivers and balanced IF outputs where even-order harmonics must be suppressed.
Can the OPA843IDBVT drive a 50Ω load directly?
Yes, the OPA843IDBVT can drive a 50Ω load directly, but with trade-offs. At ±5V supply, its output swing into 50Ω is reduced to ±2.6V (min) per the Electrical Characteristics table. To maintain full 2Vpp signal integrity, TI recommends using 100Ω termination (e.g., 50Ω series + 50Ω shunt) as shown in Figure 1 - this presents ~83Ω effective load, preserving bandwidth and distortion specs. Direct 50Ω driving is feasible for lower-amplitude signals or when accepting reduced output swing.
What thermal considerations apply to the OPA843IDBVT in SOT-23-5 package?
The OPA843IDBVT in SOT-23-5 (DBV) package has a junction-to-ambient thermal resistance (θJA) of 150°C/W. At 20.2mA quiescent current and ±5V supply, it dissipates ~202mW. Under worst-case ambient (85°C), junction temperature reaches ~115°C - well within the 150°C limit. However, sustained ±100mA output into low-impedance loads significantly increases power dissipation; board-level copper pour and thermal vias are strongly recommended to avoid thermal shutdown or parameter drift.
OPA843IDBVT 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
OPA843IDBVT FAQ
1.How can I place an order for OPA843IDBVT through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA843IDBVT 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 OPA843IDBVT reliable?
The price and inventory of OPA843IDBVT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA843IDBVT is usually 5 days.
3.What payment methods are accepted for OPA843IDBVT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA843IDBVT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA843IDBVT?
OPA843IDBVT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA843IDBVT 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 OPA843IDBVT?
For technical support, including OPA843IDBVT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA843IDBVT requirements.
6.How does Aetrix verify that OPA843IDBVT is sourced from the original manufacturer or authorized distributors?
All OPA843IDBVT 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 OPA843IDBVT meets industry standards.
7.What is the process for return or replacement of OPA843IDBVT?
All OPA843IDBVT units undergo pre-shipment inspection (PSI). If there is an issue with OPA843IDBVT, 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 OPA843IDBVT part is unused and in its original packaging.
Return procedure for OPA843IDBVT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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