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Texas Instruments OPA691IDBVTG4
- Part No.:
- OPA691IDBVTG4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- SOT-23-6
- Datasheet:
-
OPA691IDBVTG4.pdf
- Description:
- IC OPAMP CFA 1 CIRCUIT SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:2,575
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Product details
Overview
OPA691IDBVTG4 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 OPA691IDBVTG4 datasheet, OPA691IDBVTG4 pinout, OPA691IDBVTG4 application, or OPA691IDBVTG4 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 footprint, and verified performance in +5V single-supply ADC driver and xDSL line driver configurations.
Technical Context
The OPA691IDBVTG4 employs a current-feedback architecture where bandwidth remains stable across gains - delivering 190MHz at G = +2 and 280MHz at G = +1. Its output stage supports rail-to-rail output voltage swing with minimal crossover distortion, enabling clean 3VPP operation on +5V supply into 100Ω loads.
Disable functionality is implemented via a logic-low active DIS pin that reduces supply current to <150µA while placing the output in high-impedance state. Enable/disable timing is characterized at 25ns/400ns, with turn-on/off glitches limited to ±50mV/±20mV under defined load conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Small-Signal Bandwidth (G = +2) | 190MHz min at +25°C on +5V supply - enables >100MHz analog signal paths in portable instruments and video buffers. |
| Slew Rate | 2100V/µs min on ±5V supply - supports fast transient response for 5V-step signals without slewing-induced distortion. |
| Output Current | ±190mA min on ±5V supply - drives heavy capacitive or resistive loads including 50Ω/75Ω video lines and ADC input networks. |
| Differential Gain/Phase | 0.07%/0.02° typ at NTSC, RL = 150Ω - meets broadcast-grade video fidelity requirements for RGB and composite video routing. |
| Supply Current (Active) | 5.1mA max at +25°C - enables low-power, battery-operated designs without sacrificing bandwidth or drive capability. |
| Disabled Supply Current | 150µA max - reduces system standby power in multiplexed video or channel-switching applications. |
| Input Voltage Noise | 1.7nV/√Hz typ above 1MHz - preserves SNR in high-frequency signal chains such as IF amplifiers and imaging channels. |
Pinout & Package
SOT-23-6 package (DBV) with 1.6mm × 2.9mm footprint, 0.95mm height, and 0.95mm pitch - optimized for space-constrained portable and high-density PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Output) | Amplifier output node | Delivers high-current, low-distortion signal; supports 190mA sourcing/sinking into 100Ω loads. |
| 2 (–VS) | Negative supply connection | Accepts –5V (dual) or ground (single-supply); internal biasing ensures stable operation down to 0V. |
| 3 (Noninverting Input) | High-impedance input node | 100kΩ || 2pF input impedance; common-mode range extends to ±3.5V on ±5V supply. |
| 4 (+VS) | Positive supply connection | Accepts +5V to +12V; supports rail-splitting for single-supply ADC interface with mid-rail bias. |
| 5 (DIS) | Active-low disable control | Pulling LOW disables amplifier and places output in high-Z; open or HIGH enables normal operation. |
| 6 (Inverting Input) | Current-summing input node | 35Ω inverting input resistance; sets transimpedance gain and feedback stability in current-feedback topology. |
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 - maintains color fidelity in RGB and SD/HD video signal distribution. |
| Fast enable/disable switching | 25ns enable time and 400ns disable time - enables glitch-controlled channel multiplexing in wired-OR video routers. |
| High output current with low headroom | ±190mA drive into 100Ω while swinging within 1V of either rail - supports 3VPP output on +5V supply without external boost circuitry. |
| Current-feedback gain independence | Bandwidth varies <10% from G = +1 to G = +10 - simplifies design of gain-variable IF amplifiers and summing stages. |
Applications
| RGB Line Driver | Single-Supply ADC Driver |
|---|---|
Use Scenario: Driving three parallel RGB signals from graphics controller to display panel over 75Ω coaxial cables in portable monitors. IC Role / Device Role / Timing Role: High-current, low-dG/dφ buffer amplifying baseband video with DC coupling and precise gain matching. Use Value: Maintains 0.07%/0.02° differential gain/phase error across full 0–5MHz video bandwidth, preserving color accuracy without external calibration. | Use Scenario: Conditioning analog input to ADS823 10-bit, 60MSPS ADC in handheld spectrum analyzer with +5V-only power rail. IC Role / Device Role / Timing Role: AC-coupled, gain-of-+4 driver providing >180MHz small-signal bandwidth and >58dBc SFDR at 20MHz input. Use Value: Delivers 2VPP output swing with <150mV settling error in 12ns, meeting ADC aperture jitter and dynamic range requirements. |
| xDSL Line Driver | Widband Inverting Summing Amplifier |
Use Scenario: Transmit path driver in ADSL2+ CPE modem, amplifying multi-tone DMT signal before hybrid coupler and line interface. IC Role / Device Role / Timing Role: High-linearity, current-feedback amplifier operating at 190MHz with 15dBm –1dB compression point into 50Ω. Use Value: Achieves –74dBc 3rd-harmonic distortion at 5MHz and 2VPP, supporting >12Mbps downstream data rates. | Use Scenario: Combining five RF inputs (each from 50Ω source) into single broadband IF output in software-defined radio front-end. IC Role / Device Role / Timing Role: Inverting summing node with NG = 6, configured for flat 200MHz bandwidth and matched 50Ω input/output impedance. Use Value: Provides >200MHz small-signal bandwidth and –1dBm compression at 15dBm, enabling multi-carrier signal aggregation without intermodulation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current-feedback op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA690IDBVT | Voltage-feedback architecture; unity-gain stable; 280MHz GBW; 1000V/µs slew rate; higher DC accuracy but lower output current (120mA). | Better for precision DC-coupled gain stages; less suitable for high-current video or xDSL line driving. | Select OPA690IDBVT when DC offset (<0.2mV) and CMRR (>90dB) outweigh peak output current needs. |
| OPA2691IDGKT | Dual-channel version in VSSOP-8; identical AC specs per channel; 10.2mA total quiescent current vs 5.1mA for single OPA691IDBVTG4. | Used where space permits dual-channel integration (e.g., stereo audio, dual ADC inputs) rather than discrete single-channel placement. | Select OPA2691IDGKT only when dual-channel consolidation reduces board area or BOM count without compromising thermal budget. |
Compared with OPA690IDBVT and OPA2691IDGKT, the OPA691IDBVTG4 uniquely balances ultra-low quiescent current (5.1mA), high output drive (±190mA), and 190MHz bandwidth in a 6-pin SOT-23 - making it optimal for single-channel, power-sensitive, high-fidelity analog signal routing.
Availability
OPA691IDBVTG4 is available at Aetrix Electronics and suitable for RGB line drivers, single-supply ADC interfaces, and xDSL line drivers requiring stable component supply across industrial temperature ranges (–40°C to +85°C) and long-lifecycle production programs.
Supply support for OPA691IDBVTG4 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 amps and precision signal chain solutions.
The OPA691IDBVTG4 belongs to TI's OPAx691 family of current-feedback op amps engineered for wideband, low-power, single-supply operation in video, communications, and test equipment - emphasizing bandwidth stability across gain, low distortion, and integrated disable control.
FAQ
What supply voltage ranges does the OPA691IDBVTG4 support?
The OPA691IDBVTG4 operates from ±2.5V to ±6V dual supplies or +5V to +12V single supply. Minimum specified single-supply voltage is +4V; maximum is +12V. At +5V, it delivers 190MHz bandwidth and 2100V/µs slew rate - confirmed in TI SBOS226D Electrical Characteristics tables.
How does the disable function work on the OPA691IDBVTG4?
The OPA691IDBVTG4 DIS pin is active-low: pulling it below 1.5V disables the amplifier, reducing supply current to ≤150µA and placing the output in high-impedance state. Leaving DIS open or holding it ≥3.3V enables normal operation. Enable/disable times are 25ns and 400ns respectively - measured with 1V input step under G = +2, RL = 150Ω conditions.
What is the output voltage swing capability of the OPA691IDBVTG4 on +5V supply?
On +5V single supply, the OPA691IDBVTG4 delivers 1V to 4V output swing (3VPP) into 100Ω load with >150mA drive current and >150MHz bandwidth. This is enabled by its low-headroom output stage - verified in Figure 2 and Table "ELECTRICAL CHARACTERISTICS: VS = +5V" of SBOS226D.
Can the OPA691IDBVTG4 be used in inverting summing configurations?
Yes - the OPA691IDBVTG4 supports wideband inverting summing due to its current-feedback architecture. The front-page application circuit demonstrates a 5-input summing amplifier with 200MHz bandwidth and 15dBm –1dB compression. Key design elements include 100Ω feedback resistors and 30Ω series resistor at the inverting input to optimize bandwidth flatness for noise gain = 6.
What are the thermal characteristics of the OPA691IDBVTG4 in SOT-23-6 package?
The OPA691IDBVTG4 in SOT-23-6 (DBV) package has a junction-to-ambient thermal resistance (θJA) of 150°C/W, rated for operation from –40°C to +85°C. Maximum junction temperature is +175°C. Derating is required above ambient temperatures where power dissipation exceeds safe limits - detailed in SBOS226D Thermal Information section.
OPA691IDBVTG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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
OPA691IDBVTG4 FAQ
1.How can I place an order for OPA691IDBVTG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA691IDBVTG4 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 OPA691IDBVTG4 reliable?
The price and inventory of OPA691IDBVTG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA691IDBVTG4 is usually 5 days.
3.What payment methods are accepted for OPA691IDBVTG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA691IDBVTG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA691IDBVTG4?
OPA691IDBVTG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA691IDBVTG4 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 OPA691IDBVTG4?
For technical support, including OPA691IDBVTG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA691IDBVTG4 requirements.
6.How does Aetrix verify that OPA691IDBVTG4 is sourced from the original manufacturer or authorized distributors?
All OPA691IDBVTG4 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 OPA691IDBVTG4 meets industry standards.
7.What is the process for return or replacement of OPA691IDBVTG4?
All OPA691IDBVTG4 units undergo pre-shipment inspection (PSI). If there is an issue with OPA691IDBVTG4, 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 OPA691IDBVTG4 part is unused and in its original packaging.
Return procedure for OPA691IDBVTG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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