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Texas Instruments OPA691IDBVRG4
- Part No.:
- OPA691IDBVRG4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SOT-23-6
- Datasheet:
-
OPA691IDBVRG4.pdf
- Description:
- IC OPAMP CFA 1 CIRCUIT SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:2,985
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Product details
Overview
OPA691IDBVRG4 from Texas Instruments is a wideband current-feedback operational amplifier with disable control, designed for high-speed signal conditioning in single-supply systems. It delivers 190MHz bandwidth at G = +2, 2100V/µs slew rate, ±4.0V output swing, and 190mA output current on ±5V supplies - enabling RGB line driving and ADC input buffering in portable instrumentation and broadband video systems.
For engineers reviewing the OPA691IDBVRG4 datasheet, OPA691IDBVRG4 pinout, OPA691IDBVRG4 application, or OPA691IDBVRG4 equivalent, key selection criteria include its 5.1mA quiescent current, 150µA disabled supply current, low dG/dφ (0.07%/0.02°), SOT-23-6 package compatibility, and verified performance in +5V single-supply ADC driver and video summing configurations.
Technical Context
The OPA691IDBVRG4 uses a current-feedback architecture where bandwidth remains stable across gain settings - unlike voltage-feedback op amps - enabling consistent 190MHz small-signal bandwidth at G = +2 and 280MHz at G = +1. Its transimpedance gain is 225kΩ (min) with 0.03Ω closed-loop output impedance at 100kHz.
It features a dedicated DIS pin that places the output in high-impedance state when pulled LOW, reducing supply current to <150µA. The output stage supports minimal voltage headroom (±1V from rails) and delivers >160mA sourcing/sinking current while maintaining low crossover distortion and 0.07% differential gain error in NTSC video applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Small-Signal Bandwidth | 190MHz at G = +2, RF = 453Ω (±5V); enables high-fidelity 1080p video and IF amplification up to 100MHz |
| Slew Rate | 2100V/µs (±5V), 850V/µs (+5V); supports fast transient response for 2VPP step signals in ADC drivers |
| Output Current | ±190mA (min), ±250mA short-circuit; drives 100Ω loads directly without external buffers in line-driver applications |
| Differential Gain/Phase | 0.07%/0.02° (NTSC, RL = 150Ω); meets broadcast-grade video fidelity requirements without post-compensation |
| Supply Current | 5.1mA (typ) at 25°C, trimmed for stability; enables low-power portable instrumentation with thermal derating to 5.7mA max at +85°C |
| Disable Current | <150µA (max) when DIS = LOW; reduces system power by >97% during idle periods in multiplexed video or channel-switching systems |
| Input Voltage Noise | 1.7nV/√Hz (f > 1MHz); preserves SNR in wideband receiver front-ends and high-resolution ADC interfaces |
Pinout & Package
SOT-23-6 package (DBV) with 6-pin surface-mount footprint, 1.6mm × 2.9mm body size, and 0.95mm height - optimized for space-constrained portable instruments and high-density video routing PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Output) | Amplifier output node | Delivers high-current, low-distortion signal; supports 100Ω load directly with ±3.9V swing (no load) |
| 2 (–VS) | Negative supply rail | Accepts –5V (bipolar) or ground (single-supply); internal biasing maintains operation down to +4V total supply |
| 3 (Noninverting Input) | High-impedance input node | 100kΩ || 2pF input impedance; common-mode range extends to ±3.5V (±5V supply) for flexible AC/DC coupling |
| 4 (+VS) | Positive supply rail | Accepts +5V to +12V; PSRR of 55dB ensures immunity to supply ripple in noisy embedded systems |
| 5 (DIS) | Active-low disable control | Pull LOW to enter power-down mode; enable/disable times are 25ns/400ns - suitable for sync-retrace video switching |
| 6 (Inverting Input) | Current-summing node | 38Ω inverting input resistance (typ); sets feedback network gain and bandwidth in current-feedback configuration |
Key Features
| Feature | Design Value |
|---|---|
| Wideband +5V operation | 190MHz bandwidth at G = +2 on single +5V supply - eliminates need for dual-rail supplies in portable test equipment |
| Low distortion video drive | 0.07% differential gain / 0.02° differential phase error at NTSC frequencies - meets SMPTE RP-168 compliance for broadcast monitors |
| High-output-current stage | ±190mA continuous output current with minimal voltage headroom - drives coaxial cables and ADC input capacitors without external buffers |
| Fast enable/disable control | 25ns enable time and 400ns disable time with ±50mV turn-on glitch - enables clean channel switching in wired-OR video multiplexers |
| Thermally robust design | θJA = 150°C/W (SOT-23-6); supports continuous operation at +85°C ambient with 1W internal power limit |
Applications
| RGB Line Driver | Single-Supply ADC Driver |
|---|---|
Use Scenario: Driving three parallel 75Ω coaxial lines for high-definition RGB video output from FPGA or graphics processor. IC Role / Device Role / Timing Role: Current-feedback buffer with disable control, providing gain-of-1, DC-coupled signal path and synchronized channel blanking. Use Value: Delivers 190MHz bandwidth and 0.07%/0.02° dG/dφ to preserve color fidelity across full HD resolution without external equalization. |
Use Scenario: Conditioning analog input to 10-bit, 60MSPS ADC (e.g., ADS823) in portable spectrum analyzer front-end. IC Role / Device Role / Timing Role: Single-supply +5V input driver with AC-coupled gain-of-+4 configuration and mid-rail biasing. Use Value: Achieves >58dBc SFDR at 20MHz input frequency by combining 2100V/µs slew rate, low 1.7nV/√Hz noise, and 190mA drive into ADC input capacitance. |
| Video Summing Amplifier | DSL Line Driver |
Use Scenario: Combining five 50Ω RF video sources into one 75Ω output using inverting summing topology with matched impedances. IC Role / Device Role / Timing Role: Current-feedback summing node with 100Ω feedback resistors and 30Ω series compensation for flat 200MHz response. Use Value: Enables –1dB compression at 15dBm (100MHz) with <2dB peaking - supports multi-channel SDI distribution without external isolators. |
Use Scenario: Transmitting broadband DSL signals (up to 30MHz) over twisted-pair telephone lines with echo cancellation circuitry. IC Role / Device Role / Timing Role: High-output-current line driver with disable control for dynamic channel power management during sleep modes. Use Value: Maintains 190mA drive capability and 190MHz bandwidth while reducing quiescent current to 150µA during idle - extending modem battery life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current-feedback amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA690IDBVR | Voltage-feedback architecture; unity-gain stable at 280MHz but lower output current (150mA) and higher supply current (6.5mA) | Better DC accuracy and offset drift, but reduced drive strength limits use in 100Ω video line driving | Select OPA690IDBVR when DC precision outweighs peak current demand - e.g., sensor signal conditioning with moderate bandwidth |
| OPA2691IDGKR | Dual-channel version in VSSOP-8; identical AC specs but 2× supply current (10.2mA) and no DIS pin per channel | Lacks per-channel disable control - unsuitable for time-multiplexed video switching or power-gated ADC channels | Choose OPA2691IDGKR only for dual-path non-multiplexed applications like stereo audio or dual ADC inputs where layout density justifies extra current draw |
Compared with OPA690IDBVR and OPA2691IDGKR, the OPA691IDBVRG4 uniquely combines single-channel SOT-23-6 packaging, active disable control, 190mA output drive, and 190MHz bandwidth - making it the only option among the three for space-constrained, power-aware, high-current video and ADC interface designs.
Availability
OPA691IDBVRG4 is available at Aetrix Electronics and suitable for RGB line driving, single-supply ADC buffering, broadband video multiplexing, and xDSL line transmission requiring stable component supply across industrial temperature ranges (–40°C to +85°C).
Supply support for OPA691IDBVRG4 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-speed op amp design and manufacturing.
The OPA691IDBVRG4 belongs to TI's high-performance current-feedback op amp product line, engineered specifically for demanding wideband applications including video signal routing, high-speed data acquisition, and communications infrastructure where bandwidth, linearity, and power efficiency are co-optimized.
FAQ
What is the maximum operating supply voltage for the OPA691IDBVRG4?
The OPA691IDBVRG4 supports a maximum operating voltage of ±6V in dual-supply mode or +12V in single-supply mode. Absolute maximum ratings specify ±6.5VDC on power pins; exceeding this risks permanent damage. For reliable long-term operation, TI recommends staying within ±6V or +12V, especially under elevated temperature conditions where thermal derating applies.
Does the OPA691IDBVRG4 require external compensation components?
No, the OPA691IDBVRG4 is unity-gain stable and does not require external compensation. Its current-feedback architecture inherently provides flat frequency response up to 280MHz at G = +1. However, resistor values (RF, RG) must be selected per TI's "Setting Resistor Values to Optimize Bandwidth" guidelines to maintain bandwidth flatness across gains - e.g., RF = 453Ω for G = +2 on +5V supply.
Can the OPA691IDBVRG4 drive a 50Ω load directly?
Yes, the OPA691IDBVRG4 can drive a 50Ω load directly with verified performance: it delivers ±190mA output current and maintains 190MHz bandwidth at G = +2 into 100Ω, and tested data shows usable response into 50Ω with appropriate layout (e.g., series termination). Output voltage swing drops to ±3.6V (min) under 50Ω load, sufficient for most RF and video applications.
How does the disable function affect output impedance in the OPA691IDBVRG4?
When the DIS pin is pulled LOW, the OPA691IDBVRG4 output enters high-impedance state with typical output capacitance of 4pF. This allows safe wired-OR connection of multiple outputs without contention. Off isolation exceeds 65dB at 5MHz, ensuring minimal feedthrough from disabled channels - critical for clean video multiplexing and channel-switching applications.
Is the OPA691IDBVRG4 pin-compatible with other SOT-23-6 op amps?
No, the OPA691IDBVRG4 has a unique pinout optimized for current-feedback operation: Pin 1 = Output, Pin 2 = –VS, Pin 3 = Noninverting Input, Pin 4 = +VS, Pin 5 = DIS, Pin 6 = Inverting Input. This differs from standard voltage-feedback SOT-23-6 op amps (e.g., OPA355, TLV27xx), which typically place power pins on Pins 1/6 or 2/5. PCB layout must follow TI's DBV package marking diagram.
OPA691IDBVRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Amplifier Type:
- Current Feedback
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 2100V/µs
- Gain Bandwidth Product:
- 2 GHz
- -3db Bandwidth:
- 280 MHz
- Current - Input Bias:
- 15 µA
- Voltage - Input Offset:
- 500 µV
- Current - Supply:
- 5.1mA
- 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
OPA691IDBVRG4 FAQ
1.How can I place an order for OPA691IDBVRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA691IDBVRG4 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 OPA691IDBVRG4 reliable?
The price and inventory of OPA691IDBVRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA691IDBVRG4 is usually 5 days.
3.What payment methods are accepted for OPA691IDBVRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA691IDBVRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA691IDBVRG4?
OPA691IDBVRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA691IDBVRG4 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 OPA691IDBVRG4?
For technical support, including OPA691IDBVRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA691IDBVRG4 requirements.
6.How does Aetrix verify that OPA691IDBVRG4 is sourced from the original manufacturer or authorized distributors?
All OPA691IDBVRG4 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 OPA691IDBVRG4 meets industry standards.
7.What is the process for return or replacement of OPA691IDBVRG4?
All OPA691IDBVRG4 units undergo pre-shipment inspection (PSI). If there is an issue with OPA691IDBVRG4, 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 OPA691IDBVRG4 part is unused and in its original packaging.
Return procedure for OPA691IDBVRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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