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Texas Instruments OPA2680N
- Part No.:
- OPA2680N
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA2680N.pdf
- Description:
- IC OPAMP VFB 300MHZ DUAL 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:16,833
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Product details
Overview
OPA2680N from Burr-Brown (now Texas Instruments) is a dual, unity-gain-stable, voltage-feedback operational amplifier with enable/disable control, designed for high-speed analog signal conditioning in single- or dual-supply systems. It delivers 220MHz small-signal bandwidth (G = +2), 1800V/µs slew rate, ±4.0V output swing into no load, and 150mA output current - enabling use as an RGB line driver, ADC input buffer, or xDSL line driver.
For engineers reviewing the OPA2680N datasheet, OPA2680N pinout, OPA2680N application, or OPA2680N equivalent, key selection considerations include its SO-14 package with dedicated disable pins per channel, guaranteed 25ns enable / 100ns disable timing, low 6.4mA/ch quiescent current (trimmed at 25°C), and verified performance under ±5V and +5V supply conditions.
Technical Context
The OPA2680N employs a novel high-slew-rate input stage that delivers 1800V/µs while maintaining low 6.4mA/channel quiescent current - unlike conventional voltage-feedback op amps limited by fixed-bias current steering. Its output stage supports high-current sourcing (+190mA) and sinking (–150mA) with minimal headroom, enabling >3Vp-p output swing on +5V supply.
It features independent disable control per channel (pins 3 and 5 in SO-14), reducing supply current to <600µA per channel when disabled, with 70dB off-isolation at 5MHz. The architecture is optimized for DC-coupled single-supply ADC driving (e.g., ADS822) and AC-coupled video line driving with <0.06% differential gain error and <0.03° differential phase error (NTSC).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Small-Signal Bandwidth (G = +2) | 220MHz typical (±5V); enables full HD video and 40MSPS ADC buffering without gain peaking |
| Slew Rate | 1800V/µs min (±5V); supports clean 5Vp-p step response in <2.8ns with <0.02% settling in 12ns |
| Output Current (Sourcing) | +190mA min (±5V, no load); drives 50Ω video loads or 100Ω ADC inputs with >100mA sustained current |
| Input Voltage Noise | 4.8nV/√Hz typ (f > 1MHz); low enough for high-SFDR transimpedance amplification of DDS DACs |
| Disable Current (per channel) | <600µA typ (SO-14, VDIS = 0V); reduces system standby power by >90% vs active mode (6.4mA/ch) |
| Differential Gain/Phase (NTSC) | 0.05% / 0.03° typ; meets broadcast-grade video fidelity requirements for RGB or composite line driving |
| Enable/Disable Time | 25ns enable / 100ns disable typ; supports sub-microsecond channel switching in wired-OR video multiplexers |
Pinout & Package
OPA2680N is packaged in a 14-pin SOIC (SO-14) surface-mount package (drawing 235), with thermal resistance θJA = 100°C/W. Pin functions are validated per official Burr-Brown PDS-1433C datasheet.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (–In A) | Inverting input, Channel A | High-impedance differential input node; CMIR = ±3.5V (±5V supply) |
| 2 (+In A) | Non-inverting input, Channel A | DC bias point for single-supply operation; requires matched source impedance for offset minimization |
| 3 (DISA) | Channel A disable control | Pulled low to disable Channel A; open/high = normal operation; 3.3V min enable threshold |
| 4 (–VS) | Negative supply rail | Accepts –6V max; required for bipolar operation; omitted in +5V-only designs |
| 5 (DISB) | Channel B disable control | Independent control for Channel B; same logic and timing as DISA |
| 6 (+In B) | Non-inverting input, Channel B | Electrically identical to Pin 2; supports dual-channel synchronous or independent operation |
| 7 (–In B) | Inverting input, Channel B | Matches Pin 1; supports matched layout for IQ receiver or differential ADC driver applications |
| 8 (Out A) | Output, Channel A | Capable of ±4.0V swing (no load); 4pF capacitance when disabled; 0.03Ω closed-loop output impedance |
| 9 (NC) | No connect | Not internally bonded; must remain unconnected per datasheet |
| 10 (NC) | No connect | Not internally bonded; must remain unconnected |
| 11 (+VS) | Positive supply rail | Accepts +12V max; operates from +5V only (single-supply mode) or ±5V (dual-supply mode) |
| 12 (NC) | No connect | Not internally bonded; must remain unconnected |
| 13 (NC) | No connect | Not internally bonded; must remain unconnected |
| 14 (Out B) | Output, Channel B | Functionally identical to Pin 8; supports matched channel-to-channel crosstalk of –70dBc at 5MHz |
Key Features
| Feature | Design Value |
|---|---|
| Wideband voltage feedback architecture | Delivers 220MHz bandwidth and 1800V/µs slew rate without current-feedback trade-offs in DC accuracy |
| Dual independent disable control | Enables per-channel power gating in multi-amplifier systems (e.g., video multiplexers), reducing total system idle current |
| Single-supply ADC driver capability | Supports DC-coupled 2.5V common-mode input/output with >150MHz bandwidth and <0.02% settling on +5V supply |
| Low-distortion video line driving | Meets NTSC broadcast specs: 0.05% dG / 0.03° dP; suitable for RGB, Y/C, or composite video distribution |
| Matched dual-channel performance | –70dBc channel-to-channel crosstalk at 5MHz ensures integrity in IQ modulation paths and differential signaling |
Applications
| RGB Video Line Driver | xDSL Line Transceiver |
|---|---|
|
Use Scenario: Driving three synchronized RGB signals over 75Ω coaxial cables to display panels or broadcast equipment. IC Role / Device Role / Timing Role: Dual-channel OPA2680N used per color (e.g., one device for R+G, second for B+sync), each configured for G = +2, DC-coupled, ±5V supply. Use Value: Maintains <0.06% differential gain and <0.03° phase error across 4.2MHz video bandwidth, eliminating color shift and timing skew. |
Use Scenario: Transmitting and receiving high-frequency DSL signals (up to 30MHz) in ADSL/VDSL line cards with echo cancellation. IC Role / Device Role / Timing Role: One OPA2680N channel drives the line (transmit path), the other buffers the received signal (receive path), both operating at G = +2, +5V supply. Use Value: 220MHz bandwidth and –70dBc crosstalk prevent transmit leakage from corrupting receive-path SNR during full-duplex operation. |
| High-Speed ADC Input Buffer | Wired-OR Video Multiplexer |
|
Use Scenario: Conditioning analog inputs to 10-bit, 40MSPS ADCs (e.g., ADS822) in portable test equipment with battery-powered operation. IC Role / Device Role / Timing Role: Single OPA2680N configured as DC-coupled G = +2 driver, referenced to 2.5V common-mode, powered from +5V only. Use Value: Delivers 2Vp-p output swing with <65dBc SFDR at 10MHz, exceeding ADC's dynamic range without external attenuation. |
Use Scenario: Selecting among four camera feeds onto one shared 75Ω video bus using make-before-break switching during vertical retrace. IC Role / Device Role / Timing Role: Four OPA2680N devices (each with one channel enabled), outputs wired together via 82.5Ω series resistors; DIS pins sequenced to avoid glitches. Use Value: 25ns enable time ensures seamless transition; 70dB off-isolation prevents disabled channels from loading the bus or injecting noise. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar wideband op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2681N | Current-feedback architecture; higher 270MHz bandwidth but lower DC precision (higher VOS, lower CMRR) | Better for RF IF gain blocks where speed dominates DC accuracy; unsuitable for precision ADC buffering | Select OPA2681N only when >220MHz small-signal bandwidth is mandatory and offset drift <±10µV/°C is not required |
| LMH6629MA | Higher 1.5GHz GBW but lower output current (80mA); no disable function; SO-8 only | Preferred for ultra-wideband preamp stages (e.g., photodiode TIA front-end), not for line driving or multiplexing | Choose LMH6629MA when gain-bandwidth >1GHz is critical and per-channel disable control is unnecessary |
Compared with OPA2681N and LMH6629MA, the OPA2680N uniquely balances 220MHz bandwidth, 150mA output drive, dual-channel disable control, and NTSC-grade video linearity - making it irreplaceable in cost-sensitive, power-aware video and ADC interface designs requiring channel-level power management.
Availability
OPA2680N is available at Aetrix Electronics and suitable for video line driving, xDSL transceivers, and high-speed ADC buffering requiring stable component supply across industrial, broadcast, and communications equipment lifecycles.
Supply support for OPA2680N 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
Burr-Brown Corporation, acquired by Texas Instruments in 2000, specialized in high-precision analog ICs including op amps, data converters, and interface products for test & measurement and communications.
The OPA2680N belongs to Burr-Brown's OPA26xx wideband voltage-feedback op amp family, engineered specifically for demanding video, imaging, and high-speed data acquisition systems requiring unity-gain stability and low distortion.
FAQ
What supply voltages does the OPA2680N support?
The OPA2680N operates from either dual supplies (±5V, max ±6V) or single supply (+5V, max +12V). At ±5V, it achieves 220MHz bandwidth and ±4.0V output swing; at +5V, it delivers >150MHz bandwidth with 1V–4V output range. Absolute maximum ratings specify ±6.5V supply and junction temperature up to +175°C.
Does the OPA2680N have disable functionality in all packages?
No - disable control is exclusive to the SO-14 package (OPA2680N). Pins 3 (DISA) and 5 (DISB) provide independent per-channel disable. The SO-8 version (OPA2680U) lacks these pins and cannot be disabled. When DISA/DISB are pulled low, OPA2680N supply current drops to <600µA per channel while output enters high-impedance state.
What is the minimum recommended gain for stable operation of the OPA2680N?
The OPA2680N is unity-gain stable: it remains stable at G = +1 (non-inverting) or G = –1 (inverting). However, specified AC performance (e.g., 220MHz bandwidth, 1800V/µs slew rate) is guaranteed at G = +2. At G = +1, small-signal bandwidth is 400MHz, but large-signal performance degrades due to increased slew-rate limiting.
Can the OPA2680N drive a 50Ω load directly?
Yes - the OPA2680N sources +190mA and sinks –150mA, enabling direct 50Ω termination. With ±5V supplies, it delivers ±3.9V into 100Ω and ±3.7V into 50Ω. For optimal harmonic distortion, use series output resistors (e.g., 50Ω) to isolate capacitive loads and maintain 75Ω/50Ω cable impedance matching.
How does the OPA2680N compare to the OPA2680U in performance and pinout?
The OPA2680N (SO-14) and OPA2680U (SO-8) share identical core amplifier specifications (bandwidth, slew rate, noise, output current). Key differences: OPA2680N adds DISA/DISB pins for per-channel disable; OPA2680U has no disable function. Both offer same –40°C to +85°C temp range and match in electrical behavior when operated identically.
OPA2680N Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- SpeedPlus™
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Amplifier Type:
- Voltage Feedback
- Number of Circuits:
- 2
- Output Type:
- -
- Slew Rate:
- 1800V/µs
- Gain Bandwidth Product:
- 300 MHz
- -3db Bandwidth:
- 400 MHz
- Current - Input Bias:
- 8 µA
- Voltage - Input Offset:
- 1 mV
- Current - Supply:
- 12.8mA (x2 Channels)
- 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:
- 14-SOIC
OPA2680N FAQ
1.How can I place an order for OPA2680N through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2680N 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 OPA2680N reliable?
The price and inventory of OPA2680N are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2680N is usually 5 days.
3.What payment methods are accepted for OPA2680N?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2680N transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2680N?
OPA2680N orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2680N 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 OPA2680N?
For technical support, including OPA2680N datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2680N requirements.
6.How does Aetrix verify that OPA2680N is sourced from the original manufacturer or authorized distributors?
All OPA2680N 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 OPA2680N meets industry standards.
7.What is the process for return or replacement of OPA2680N?
All OPA2680N units undergo pre-shipment inspection (PSI). If there is an issue with OPA2680N, 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 OPA2680N part is unused and in its original packaging.
Return procedure for OPA2680N:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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