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Texas Instruments OPA3684IDBQRG4
- Part No.:
- OPA3684IDBQRG4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
OPA3684IDBQRG4.pdf
- Description:
- IC OPAMP CFA 3 CIRCUIT 16SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,576
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Product details
Overview
OPA3684IDBQRG4 from Texas Instruments is a triple-channel, low-power current-feedback operational amplifier with independent disable control per channel, 170MHz bandwidth at G = +2, 120mA output drive, and ±5V or single +5V supply operation. It serves as a high-fidelity RGB line driver in broadcast video systems requiring wideband gain stability and low distortion.
For engineers reviewing the OPA3684IDBQRG4 datasheet, OPA3684IDBQRG4 pinout, OPA3684IDBQRG4 application, or OPA3684IDBQRG4 equivalent, key selection considerations include its CFBPLUS architecture for gain-independent bandwidth, 1.7mA/ch quiescent current, 100µA/ch shutdown current, and SSOP-16 package compatibility with multichannel video signal conditioning layouts.
Technical Context
The OPA3684IDBQRG4 implements a patented CFBPLUS architecture featuring an internally closed-loop input buffer stage that linearizes inverting-input impedance, enabling >120MHz bandwidth up to G = +10 while minimizing harmonic distortion. Its transimpedance gain of 355kΩ (min) and 4.0Ω inverting-input resistance support stable feedback network design across gain configurations.
Each channel operates independently with dedicated DIS pins, allowing selective channel shutdown without affecting others. The amplifier maintains <–82dBc 2nd-harmonic distortion at 5MHz (RL ≥ 1kΩ) and delivers ±4Vp-p swing on ±5V supplies, with input voltage range extending to ±3.75V and output swing to ±4.1V into 1kΩ.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Bandwidth (G = +2) | 170MHz typical - enables full HD RGB signal amplification without gain-dependent roll-off |
| Output Current | ±120mA min - drives dual-terminated 50Ω video lines or multiple 150Ω composite loads |
| Supply Current | 1.7mA/ch max at ±5V - supports battery-powered portable video equipment with thermal headroom |
| Shutdown Current | 100µA/ch max - reduces system power by >94% per disabled channel in standby mode |
| Harmonic Distortion | <–82dBc 2nd-harmonic at 5MHz (RL ≥ 1kΩ) - preserves color fidelity in professional camera signal chains |
| Input Voltage Range | ±3.75V min at ±5V - accommodates DC-coupled video signals with minimal headroom loss |
| Enable Time | 40ns typical - allows rapid channel activation for dynamic video routing applications |
Pinout & Package
OPA3684IDBQRG4 is housed in a 16-pin SSOP (DBQ) package with 0.64mm pitch, 4.9mm × 3.9mm body size, and exposed pad for thermal dissipation. Pin 1 is DIS A (active-low disable for Channel A), pin 2 is DIS B, pin 3 is DIS C, pin 4 is +VS, and pin 16 is –VS.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3 | DIS A/B/C | Active-low enable control per channel; open or HIGH = normal operation, LOW = high-impedance I/O and 100µA supply current |
| 4 | +VS | Positive supply rail connection for all three channels; supports ±2.5V to ±6V or +2.8V to +12V single supply |
| 5, 11, 14 | +Input A/B/C | Noninverting inputs; 50kΩ || 1pF input impedance enables stable termination in video applications |
| 6, 12, 15 | –Input A/B/C | Inverting inputs; 4.0Ω input resistance sets precise feedback gain with minimal parasitic sensitivity |
| 7, 13, 16 | Output A/B/C | Class-AB output stages delivering ±4Vp-p swing into 1kΩ and >±3Vp-p into 50Ω |
| 8 | NC | No connect - internal die bond wire stub; must remain unconnected on PCB |
| 9 | NC | No connect - internal die bond wire stub; must remain unconnected on PCB |
| 10 | –VS | Negative supply rail connection; referenced to same ground plane as +VS for dual-supply operation |
Key Features
| Feature | Design Value |
|---|---|
| CFBPLUS architecture | Internally buffered inverting input provides linearized 4Ω impedance, enabling constant bandwidth across G = +1 to +20 |
| Triple independent disable | Per-channel DIS pins allow selective power gating without cross-talk or timing skew between RGB channels |
| Single-supply capability | Operates from +5V with 1.25V input headroom and 1.0V output headroom, supporting AC-coupled video interfaces |
| Low distortion at high frequency | <–82dBc 2nd-harmonic at 5MHz ensures NTSC/PAL differential gain/phase error stays below 0.04%/0.02° |
| High output drive into video loads | Delivers >±3Vp-p into 50Ω and supports up to four 150Ω video loads simultaneously with <0.1dB flatness loss |
Applications
| RGB Line Drivers | Low-Power Broadcast Video Drivers |
|---|---|
Use Scenario: Driving red, green, and blue analog video signals from graphics processor to monitor interface over 75Ω coaxial cable. IC Role / Device Role / Timing Role: Triple-channel current-feedback amplifier providing matched gain, phase, and settling across RGB paths with independent channel disable. Use Value: Maintains <0.04% differential gain and <0.02° differential phase error at NTSC frequencies, preserving color accuracy without external calibration. | Use Scenario: Amplifying composite video output in portable ENG cameras operating from single Li-ion cell (3.6V nominal). IC Role / Device Role / Timing Role: Single +5V powered triple op-amp delivering 3Vp-p swing into 100Ω load with 1.7mA total quiescent current. Use Value: Enables >4-hour battery life in field-deployable video gear while meeting SMPTE 259M rise/fall time requirements (<2.5ns). |
| ADC Input Drivers | Professional Cameras |
Use Scenario: Buffering high-speed analog sensor outputs (e.g., CMOS image sensor LVDS-to-analog conversion) before 10-bit+ ADC sampling. IC Role / Device Role / Timing Role: Low-noise (3.7nV/√Hz), low-distortion amplifier driving ADC input with 170MHz small-signal bandwidth and 90MHz large-signal bandwidth. Use Value: Preserves ENOB >9.2 bits at 5MHz input frequency by limiting harmonic distortion to <–82dBc and maintaining 0.1dB flatness to 19MHz. | Use Scenario: Signal conditioning in 4K UHD cinema camera front-end for simultaneous YUV component output. IC Role / Device Role / Timing Role: Triple-channel video amplifier with independent disable enabling dynamic channel allocation for variable-resolution sensor readout. Use Value: Reduces system power by 3.4mA when two RGB channels are idle during monochrome preview mode. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current-feedback amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA3691IDBQR | Higher 500MHz bandwidth but 4.5mA/ch supply current; no per-channel disable; SO-14 only | Better for ultra-high-speed test equipment; unsuitable for battery-powered RGB systems requiring selective shutdown | Choose OPA3691IDBQR only if bandwidth >300MHz is mandatory and power budget allows 2.6× higher quiescent draw |
| OPA2684IDR | Dual-channel version with identical specs per channel; SO-8 package; no DIS pins - global shutdown only | Applicable where only two video channels needed and board space favors SO-8 over SSOP-16 | Select OPA2684IDR when RGB path count is reduced to two and per-channel disable is not required |
Compared with OPA3684IDBQRG4, OPA3691IDBQR trades 2.6× higher supply current for 2.9× bandwidth, while OPA2684IDR sacrifices channel count and disable granularity for smaller footprint and lower cost in dual-channel deployments.
Availability
OPA3684IDBQRG4 is available at Aetrix Electronics and suitable for RGB line drivers, low-power broadcast video drivers, and ADC input drivers requiring stable component supply across industrial temperature ranges (–40°C to +85°C) and long-lifecycle production programs.
Supply support for OPA3684IDBQRG4 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 company specializing in analog and embedded processing technologies, with leadership in precision amplifiers, data converters, and power management ICs.
The OPA3684IDBQRG4 belongs to TI's CFBPLUS current-feedback op-amp product line, engineered specifically for multichannel video signal conditioning where gain stability, low power, and per-channel power control are critical.
FAQ
What supply voltage ranges does the OPA3684IDBQRG4 support?
The OPA3684IDBQRG4 supports dual-supply operation from ±2.5V to ±6.0V and single-supply operation from +2.8V to +12V. At ±5V, it delivers 170MHz bandwidth and ±4Vp-p output swing; at +5V, bandwidth reduces to 110MHz with 3Vp-p swing into 100Ω. Absolute maximum supply is ±6.5V.
How does the per-channel disable function work on the OPA3684IDBQRG4?
Each channel of the OPA3684IDBQRG4 has a dedicated active-low disable pin (DIS A/B/C). Pulling a DIS pin LOW places that channel's input and output in high-impedance state and reduces its supply current to ≤100µA/ch. Leaving DIS pins open or HIGH enables normal operation. This allows independent power gating of RGB channels without affecting others.
What is the minimum load impedance the OPA3684IDBQRG4 can drive while maintaining specified performance?
The OPA3684IDBQRG4 is characterized into 50Ω, 100Ω, and 150Ω loads. It delivers >±3Vp-p into 50Ω with <–82dBc distortion at 5MHz (RL ≥ 1kΩ), and supports up to four 150Ω video loads simultaneously. Driving <50Ω risks exceeding 1W/channel power limit and triggering thermal shutdown.
Does the OPA3684IDBQRG4 require external compensation for stability?
No external compensation is required for the OPA3684IDBQRG4. Its CFBPLUS architecture is internally compensated for unity-gain stable operation with recommended RF = 800Ω (dual supply) or 1.0kΩ (single supply). Bandwidth peaking remains <6.3dB at G = +1, and 0.1dB flatness extends to 19MHz at G = +2 with proper layout.
What is the input common-mode voltage range for the OPA3684IDBQRG4 at ±5V supply?
At ±5V supply, the OPA3684IDBQRG4 has a guaranteed input common-mode voltage range of ±3.75V (min), meaning inputs can swing from –3.75V to +3.75V relative to ground. This supports DC-coupled video signals with minimal headroom loss and eliminates need for level-shifting networks in many broadcast applications.
OPA3684IDBQRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-SSOP (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Amplifier Type:
- Current Feedback
- Number of Circuits:
- 3
- Output Type:
- -
- Slew Rate:
- 780V/µs
- Gain Bandwidth Product:
- 120 MHz
- -3db Bandwidth:
- 250 MHz
- Current - Input Bias:
- 5 µA
- Voltage - Input Offset:
- 1.5 mV
- Current - Supply:
- 1.7mA
- Current - Output / Channel:
- 160 mA
- Voltage - Supply Span (Min):
- 2.8 V
- Voltage - Supply Span (Max):
- 12 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SSOP
OPA3684IDBQRG4 FAQ
1.How can I place an order for OPA3684IDBQRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA3684IDBQRG4 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 OPA3684IDBQRG4 reliable?
The price and inventory of OPA3684IDBQRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA3684IDBQRG4 is usually 5 days.
3.What payment methods are accepted for OPA3684IDBQRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA3684IDBQRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA3684IDBQRG4?
OPA3684IDBQRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA3684IDBQRG4 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 OPA3684IDBQRG4?
For technical support, including OPA3684IDBQRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA3684IDBQRG4 requirements.
6.How does Aetrix verify that OPA3684IDBQRG4 is sourced from the original manufacturer or authorized distributors?
All OPA3684IDBQRG4 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 OPA3684IDBQRG4 meets industry standards.
7.What is the process for return or replacement of OPA3684IDBQRG4?
All OPA3684IDBQRG4 units undergo pre-shipment inspection (PSI). If there is an issue with OPA3684IDBQRG4, 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 OPA3684IDBQRG4 part is unused and in its original packaging.
Return procedure for OPA3684IDBQRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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