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Texas Instruments OPA682N/250
- Part No.:
- OPA682N/250
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SOT-23-6
- Datasheet:
-
OPA682N/250.pdf
- Description:
- IC OPAMP BUFFER 330MHZ SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:2,726
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Product details
Overview
OPA682N/250 from Texas Instruments (formerly Burr-Brown) is a wideband, fixed-gain buffer amplifier with disable control, designed for high-fidelity video and ADC driving applications. It delivers 240MHz small-signal bandwidth at G = +2, ±4.0V output swing into no load, 150mA sourcing current, and operates on ±5V or single +5V supplies. Its SOT23-6 package supports compact RGB line driver and portable instrument designs.
For engineers reviewing the OPA682N/250 datasheet, OPA682N/250 pinout, OPA682N/250 application, or OPA682N/250 equivalent, key selection criteria include its 240MHz bandwidth at G = +2, 6mA quiescent supply current, 320µA disabled current, 25ns enable time, and verified performance in composite video dG/dP (<0.01% / 0.05°) and ADC buffer SFDR (>58dBc at 20MHz).
Technical Context
The OPA682N/250 uses a current-feedback architecture with internally trimmed 400Ω RF/RG resistors, enabling precise gain of +2, +1, or –1 without external components. Its output stage delivers high current with minimal headroom-±1V from rails under load-enabling robust single-supply operation.
It features a dedicated DIS pin with TTL-compatible thresholds (enable >3.3V, disable <1.8V), 100ns disable time, and <±50mV turn-on glitch. The device maintains <0.15%/°C gain drift and 2.2nV/√Hz input voltage noise above 1MHz, supporting low-distortion signal conditioning up to 200MHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Small-Signal Bandwidth (G = +2) | 240MHz typical (±5V, RL = 100Ω); enables full NTSC/PAL video bandwidth and >100MHz ADC sampling support. |
| Output Voltage Swing | ±3.9V into 100Ω load; supports 7.8Vpp drive for 75Ω video lines with <0.01% differential gain error. |
| Supply Current | 6mA max at ±5V; enables low-power portable instrumentation and multi-channel video systems. |
| Disabled Supply Current | 320µA typical; reduces system standby power by >94% versus active mode. |
| Slew Rate | 2100 V/µs min (G = +2, 4V step); ensures faithful reproduction of fast video edges and ADC input transients. |
| Harmonic Distortion (2nd, 5MHz) | –69dBc min into 100Ω; meets broadcast-grade video linearity requirements (NTSC/PAL). |
| Enable Time | 25ns typical; supports sub-microsecond channel switching in video multiplexers. |
Pinout & Package
SOT23-6 package (θJA = 150°C/W), marked "A82", with exposed pad not electrically connected. Pin 1 = DIS, Pin 2 = +IN, Pin 3 = –IN, Pin 4 = +VS, Pin 5 = Output, Pin 6 = –VS.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (DIS) | Disable control input | TTL-compatible; pull low to enter high-Z power-down state with <320µA supply current. |
| 2 (+IN) | Non-inverting input | 100kΩ || 2pF impedance; accepts DC-coupled or AC-coupled signals with ±3.5V common-mode range (±5V supply). |
| 3 (–IN) | Inverting input | Internally connected to 400Ω RG; grounding sets G = +2; open sets G = +1; used with +IN grounded for G = –1. |
| 4 (+VS) | Positive supply | Accepts +5V single supply or +5V of ±5V dual supply; max rating ±6.5V. |
| 5 (Output) | Amplifier output | Delivers ±3.9V into 100Ω, 150mA sourcing; closed-loop output impedance 0.03Ω at 100kHz. |
| 6 (–VS) | Negative supply | Required for ±5V operation; tied to ground for single +5V use (with appropriate biasing). |
Key Features
| Feature | Design Value |
|---|---|
| Internally fixed gain options | +2, +1, or –1 via simple pin strapping-no external resistors needed, eliminating layout sensitivity and tolerance drift. |
| Low-distortion video output stage | 0.001% differential gain / 0.01° differential phase (NTSC, RL = 150Ω) enables broadcast-compliant RGB/YUV line driving. |
| Single-supply ADC interface capability | 200MHz bandwidth driving 2Vpp into 100Ω on +5V supply; >58dBc SFDR at 20MHz input confirms suitability for 10-bit, 60MSPS converters. |
| Fast, low-glitch disable control | 25ns enable / 100ns disable timing with <±50mV turn-on glitch ensures clean video MUX transitions without visible artifacts. |
| Thermally optimized SOT23-6 | 150°C/W θJA enables sustained 150mA output in compact PCB footprints without forced airflow. |
Applications
| RGB Video Line Driver | Single-Supply ADC Input Buffer |
|---|---|
|
Use Scenario: Driving three parallel 75Ω coaxial cables (R/G/B) from a graphics processor in embedded displays. IC Role / Device Role / Timing Role: Fixed-gain +2 buffer with DC coupling, providing matched group delay and minimal crosstalk between channels. Use Value: Delivers 240MHz bandwidth and <0.01% dG/dP across all three channels, preserving color fidelity without external tuning. |
Use Scenario: Conditioning analog sensor output before digitization in a battery-powered data acquisition module. IC Role / Device Role / Timing Role: Single +5V supply buffer with AC-coupled input and mid-rail bias, driving ADS823 10-bit, 60MSPS ADC. Use Value: Achieves >58dBc SFDR at 20MHz while consuming only 6mA, extending runtime versus discrete op-amp solutions. |
| Video Multiplexer (Wired-OR) | Delay-Equalized Active Filter |
|
Use Scenario: Selecting between two camera inputs in security DVR hardware using make-before-break switching. IC Role / Device Role / Timing Role: Dual OPA682N/250 outputs wired together with 68.1Ω isolation resistors; DIS pins controlled by FPGA logic. Use Value: Enables <20mV switching glitch and >20dB return loss at 75Ω load-eliminates sync-line tearing during channel change. |
Use Scenario: Anti-alias filtering prior to high-speed digitization in test equipment requiring flat group delay. IC Role / Device Role / Timing Role: Third-stage amplifier in 5th-order Butterworth LPF (20MHz –3dB) with gain = +1 for low component sensitivity. Use Value: Maintains <0.5ns group delay variation across passband due to low-output-impedance, high-linearity stage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar broadband buffer amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA695N/250 | Higher 1.7GHz bandwidth but 13.5mA supply current; no integrated disable pin; requires external gain-setting resistors. | Better suited for RF IF buffering >500MHz; not drop-in for video MUX or low-power portable use. | Select OPA695N/250 only when >500MHz bandwidth is mandatory and power/per-pin count are secondary. |
| LMH6702MF/NOPB | 220MHz bandwidth, 6.5mA supply current, no internal gain resistors; disable function requires external circuitry. | Lacks factory-trimmed RF/RG network-gain accuracy and temperature stability inferior to OPA682N/250. | Choose LMH6702MF/NOPB if board space allows external resistor placement and ±0.3% gain error is acceptable. |
Compared with OPA695N/250 and LMH6702MF/NOPB, the OPA682N/250 uniquely combines factory-trimmed +2/+1/–1 gain, integrated disable, 240MHz bandwidth, and 6mA quiescent current in SOT23-6-making it the only solution meeting broadcast video dG/dP specs *and* portable instrument power budgets simultaneously.
Availability
OPA682N/250 is available at Aetrix Electronics and suitable for RGB video line drivers, single-supply ADC buffers, video multiplexers, and delay-equalized active filters requiring stable component supply across industrial temperature ranges (–40°C to +85°C).
Supply support for OPA682N/250 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 acquired Burr-Brown in 2000 and maintains full product support, datasheet documentation, and long-term manufacturing commitment for legacy precision analog ICs.
The OPA682N/250 belongs to TI's high-speed current-feedback op amp portfolio, engineered specifically for demanding video, instrumentation, and data acquisition signal paths where bandwidth, linearity, and power efficiency must coexist.
FAQ
What gain configurations does the OPA682N/250 support, and how are they set?
The OPA682N/250 supports three fixed gains: +2, +1, and –1. For G = +2, ground the –IN pin and drive +IN; for G = +1, leave –IN open and drive +IN; for G = –1, ground +IN and drive –IN. These configurations use internal 400Ω RF/RG resistors-no external components required. The OPA682N/250 datasheet specifies ±0.3% gain error at +25°C, with 0.13%/°C average drift, ensuring stable performance across –40°C to +85°C.
Can the OPA682N/250 operate from a single +5V supply, and what are the output swing limitations?
Yes, the OPA682N/250 operates from a single +5V supply with proper input biasing (e.g., 2.5V midpoint via resistive divider). Under these conditions, it delivers 1.0V to 3.9V output swing into 100Ω (2.9Vpp), supporting 2Vpp video or ADC drive requirements. The OPA682N/250 maintains 220MHz bandwidth and –62dBc 2nd harmonic distortion at 5MHz in this configuration, as verified in the +5V specification table.
What is the disable functionality of the OPA682N/250, and how does it affect output behavior?
The DIS pin on the OPA682N/250 places the amplifier in high-impedance power-down mode when pulled low (<1.8V), reducing supply current to 320µA typical and disconnecting the output. During disable, output capacitance is 4pF typical, and off-isolation exceeds 70dB at 5MHz. The OPA682N/250 exhibits 25ns enable time and <±50mV turn-on glitch-critical for artifact-free video multiplexing. Leaving DIS open or high enables normal operation.
How does the OPA682N/250 perform in composite video applications, particularly regarding differential gain and phase?
The OPA682N/250 achieves 0.001% differential gain and 0.01° differential phase error with 150Ω load (NTSC), meeting broadcast video standards. These values are measured per standard EIA-770.2 and confirmed in the OPA682N/250 datasheet's "DC PERFORMANCE" section. Performance degrades only marginally to 0.008% dG / 0.05° dP at 37.5Ω-validating its use in both professional and consumer video routing.
Is the OPA682N/250 pin-compatible with other members of the OPA68x family, such as OPA682U or OPA682P?
No-the OPA682N/250 uses SOT23-6 packaging with 6 pins, while OPA682U (SO-8) and OPA682P (DIP-8) have 8 pins and different pinouts. Pin 1 on OPA682N/250 is DIS; on SO-8/DIP-8, Pin 1 is Output. The OPA682N/250 shares identical electrical specifications with other variants but requires unique PCB layout. Migration from SO-8 to SOT23-6 demands redesign-not drop-in replacement.
OPA682N/250 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SpeedPlus™
- Package/Case:
- SOT-23-6
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Amplifier Type:
- Buffer
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 2100V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 330 MHz
- Current - Input Bias:
- 30 µA
- Voltage - Input Offset:
- 1.3 mV
- Current - Supply:
- 6mA
- Current - Output / Channel:
- 190 mA
- Voltage - Supply Span (Min):
- 5 V
- Voltage - Supply Span (Max):
- 12 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-6
OPA682N/250 FAQ
1.How can I place an order for OPA682N/250 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA682N/250 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 OPA682N/250 reliable?
The price and inventory of OPA682N/250 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA682N/250 is usually 5 days.
3.What payment methods are accepted for OPA682N/250?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA682N/250 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA682N/250?
OPA682N/250 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA682N/250 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 OPA682N/250?
For technical support, including OPA682N/250 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA682N/250 requirements.
6.How does Aetrix verify that OPA682N/250 is sourced from the original manufacturer or authorized distributors?
All OPA682N/250 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 OPA682N/250 meets industry standards.
7.What is the process for return or replacement of OPA682N/250?
All OPA682N/250 units undergo pre-shipment inspection (PSI). If there is an issue with OPA682N/250, 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 OPA682N/250 part is unused and in its original packaging.
Return procedure for OPA682N/250:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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