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Texas Instruments OPA2691I-14D
- Part No.:
- OPA2691I-14D
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA2691I-14D.pdf
- Description:
- IC OPAMP CFA 2 CIRCUIT 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,489
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Product details
Overview
OPA2691I-14D from Texas Instruments is a dual wideband current-feedback operational amplifier with independent disable control per channel, designed for high-speed analog signal conditioning in single-supply systems. It delivers 190MHz small-signal bandwidth at G = +2, 2100V/µs slew rate, ±4.0V output swing, and 190mA output current on ±5V supplies - enabling RGB line driving, ADC input buffering, and broadband video applications.
For engineers reviewing the OPA2691I-14D datasheet, OPA2691I-14D pinout, OPA2691I-14D application, or OPA2691I-14D equivalent, key selection considerations include its SO-14 package with dedicated DIS A/DIS B pins, 5.1mA/ch quiescent current, 150µA/ch disabled supply current, and verified performance in differential ADC drivers and wired-OR video multiplexers.
Technical Context
The OPA2691I-14D implements a current-feedback architecture with transimpedance gain (ZOL) of 225kΩ (min), enabling bandwidth stability across gains - 280MHz at G = 1 and 190MHz at G = +2. Its output stage supports rail-to-rail output voltage swing (±3.6V min into 100Ω) and low crossover distortion, critical for single-supply imaging and video channels.
Each channel features an independent disable pin (DIS A/DIS B) that places the output in high-impedance state while reducing supply current to <150µA/ch. Disable timing is characterized at 400ns turn-off and 25ns turn-on, with <±20mV switching glitch in wired-OR configurations - confirming suitability for synchronized video multiplexing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Small-Signal Bandwidth | 190MHz at G = +2 (±5V), enabling full NTSC/PAL video bandwidth with margin |
| Slew Rate | 2100V/µs (±5V), supporting fast transient response in ADC driver and pulse applications |
| Output Current | ±190mA (min), sufficient to drive 75Ω video loads or 100Ω ADC inputs without external buffers |
| Supply Current | 5.1mA per channel (25°C), trimmed for low power in portable instrumentation |
| Disable Current | <150µA per channel (SO-14 only), enabling dynamic power gating in multi-channel systems |
| Input Voltage Noise | 1.7nV/√Hz (f > 1MHz), preserving SNR in high-gain, wideband signal chains |
| CMRR | 56dB (min, 25°C), ensuring rejection of common-mode interference in differential ADC interfaces |
Pinout & Package
OPA2691I-14D is housed in a 14-pin SOIC (SO-14) package with exposed pad thermal enhancement (θJA = 100°C/W). Pin functions are validated per TI SBOS224D Figure 4 and Pin Configurations section.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 14 | –In A / –In B | Inverting inputs; require matched feedback networks for stable current-feedback operation |
| 2, 13 | +In A / +In B | Noninverting inputs; high-impedance (100kΩ || 2pF) for minimal loading in video/ADC front-ends |
| 3, 12 | DIS A / DIS B | Active-low disable controls; pull LOW to enter high-Z output and <150µA/ch quiescent mode |
| 4, 11 | –VS / +VS | Power supply terminals; require local 0.1µF + 6.8µF decoupling per supply rail |
| 5, 10 | Out A / Out B | High-current outputs; capable of ±190mA sourcing/sinking into 100Ω loads |
| 6, 7, 8, 9 | NC | No-connect pins; electrically isolated and must remain unconnected per datasheet |
Key Features
| Feature | Design Value |
|---|---|
| Dual-channel current-feedback architecture | Bandwidth remains stable across gain settings (190MHz at G=+2, 280MHz at G=1), simplifying filter design |
| Independent per-channel disable | Enables time-multiplexed video routing or power-gated ADC channel selection without PCB layout changes |
| Single-supply operation down to +4V | Delivers 3Vp-p output swing on +5V supply with >150MHz bandwidth, eliminating negative rail in portable systems |
| Low-distortion output stage | –74dBc 3rd-harmonic at 5MHz (RL ≥ 500Ω), meeting broadcast video differential gain/phase specs (0.07%/0.02°) |
| Matched channel performance | Channel-to-channel crosstalk <–86dBc at 5MHz, ensuring isolation in I/Q and differential ADC applications |
Applications
| RGB Line Driver | Differential ADC Driver |
|---|---|
Use Scenario: Driving three parallel 75Ω coaxial cables from graphics processor outputs in embedded displays. IC Role / Device Role / Timing Role: Dual-channel buffer amplifying R/G/B signals with matched gain/phase and low crosstalk. Use Value: 190MHz bandwidth and ±4.0V swing ensure full HD timing compliance; SO-14 layout accommodates compact pixel clock routing. |
Use Scenario: Conditioning single-ended sensor signals before digitization by ADS823 10-bit, 60MSPS ADC. IC Role / Device Role / Timing Role: Dual op amp configured as gain-of-10 single-ended-to-differential converter with common-mode bias. Use Value: 2100V/µs slew rate supports 60MSPS sampling; matched channels maintain <0.1° phase error across 100MHz input band. |
| Wired-OR Video Multiplexer | High-Speed Active Filter |
Use Scenario: Selecting between multiple camera inputs onto one shared video bus in security DVR systems. IC Role / Device Role / Timing Role: Dual amplifier with make-before-break disable enabling glitch-free channel switching during vertical blanking. Use Value: <±20mV switching glitch and 400ns disable time prevent visible artifacts; 82.5Ω output matching ensures 75Ω cable termination. |
Use Scenario: Implementing 5th-order elliptic low-pass filter for anti-aliasing in medical ultrasound receivers. IC Role / Device Role / Timing Role: Fixed-gain current-feedback block inside passive RC ladder network. Use Value: Constant bandwidth vs. gain minimizes pole shift; 190mA output drives reactive filter loads without peaking or instability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current-feedback amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2690ID | Voltage-feedback architecture; unity-gain stable; 280MHz GBW; 1000V/µs slew rate; no disable function | Better DC accuracy (±0.3mV VOS) but lower output current (±120mA); unsuitable for power-gated multiplexing | Select when precision DC performance outweighs disable capability and output drive |
| OPA2681ID | Current-feedback; 220MHz bandwidth at G=+2; 1900V/µs slew; 160mA output; no disable pins; SO-8 package | Lacks per-channel disable and SO-14 pinout; smaller footprint but no wired-OR support; higher quiescent current (6.5mA/ch) | Select when board space is constrained and disable functionality is not required |
Compared with OPA2691I-14D, OPA2690ID trades disable control and output drive for superior DC precision, while OPA2681ID offers similar AC performance in a smaller package but omits the critical SO-14 disable pins needed for video multiplexing.
Availability
OPA2691I-14D is available at Aetrix Electronics and suitable for RGB line driving, differential ADC interfacing, wired-OR video multiplexing, and high-speed active filtering requiring stable component supply across industrial, medical, and broadcast equipment lifecycles.
Supply support for OPA2691I-14D 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 over 50 years of innovation in high-performance op amps and signal chain solutions.
The OPA2691I-14D belongs to TI's high-speed current-feedback op amp product line, engineered specifically for broadband video, imaging, and data acquisition systems demanding wide bandwidth, low distortion, and dynamic power control.
FAQ
What is the maximum operating supply voltage for the OPA2691I-14D?
The OPA2691I-14D supports a maximum operating voltage range of ±6V for dual-supply operation and up to +12V for single-supply use. Absolute maximum ratings specify ±6.5VDC on power supply pins. Exceeding these limits risks permanent damage, and operation above ±6V or +12V is not characterized or guaranteed per TI SBOS224D specifications.
Does the OPA2691I-14D support true rail-to-rail input and output operation?
No, the OPA2691I-14D is not a rail-to-rail device. Its input common-mode range extends to ±3.5V (min) on ±5V supplies, and output swing is specified as ±3.6V (min) into 100Ω. On +5V single supply, it delivers 1V to 4V output swing - a 3Vp-p range centered at 2.5V - requiring careful biasing for AC-coupled applications.
How does the disable function work on the OPA2691I-14D?
The OPA2691I-14D provides independent active-low disable pins (DIS A and DIS B) on pins 3 and 12. Pulling either pin LOW places that channel's output in high-impedance state and reduces its supply current to <150µA/ch. Leaving the pin open or HIGH maintains normal operation. This feature is exclusive to the SO-14 package (OPA2691I-14D) and not available on SO-8 variants.
Can the OPA2691I-14D be used in differential ADC driver circuits?
Yes, the OPA2691I-14D is explicitly validated for differential ADC driver applications, as shown in TI SBOS224D Figure 3. Its matched dual channels, low crosstalk (<–86dBc), and 2100V/µs slew rate enable clean single-ended-to-differential conversion for converters like the ADS823. The disable pins further allow channel power-down during idle cycles to reduce system power.
What is the thermal resistance (θJA) of the OPA2691I-14D in its SO-14 package?
The OPA2691I-14D in SO-14 package has a junction-to-ambient thermal resistance (θJA) of 100°C/W, as specified in TI SBOS224D Electrical Characteristics table. This value assumes standard JEDEC 2-layer board conditions. For high-power operation, thermal vias under the exposed pad and copper pour are recommended to maintain TJ ≤ 125°C at full output current.
OPA2691I-14D Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Amplifier Type:
- Current Feedback
- Number of Circuits:
- 2
- Output Type:
- -
- Slew Rate:
- 2100V/µs
- Gain Bandwidth Product:
- 2 GHz
- -3db Bandwidth:
- 280 MHz
- Current - Input Bias:
- 15 µA
- Voltage - Input Offset:
- 800 µV
- Current - Supply:
- 10.2mA (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
OPA2691I-14D FAQ
1.How can I place an order for OPA2691I-14D through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2691I-14D 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 OPA2691I-14D reliable?
The price and inventory of OPA2691I-14D are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2691I-14D is usually 5 days.
3.What payment methods are accepted for OPA2691I-14D?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2691I-14D transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2691I-14D?
OPA2691I-14D orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2691I-14D 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 OPA2691I-14D?
For technical support, including OPA2691I-14D datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2691I-14D requirements.
6.How does Aetrix verify that OPA2691I-14D is sourced from the original manufacturer or authorized distributors?
All OPA2691I-14D 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 OPA2691I-14D meets industry standards.
7.What is the process for return or replacement of OPA2691I-14D?
All OPA2691I-14D units undergo pre-shipment inspection (PSI). If there is an issue with OPA2691I-14D, 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 OPA2691I-14D part is unused and in its original packaging.
Return procedure for OPA2691I-14D:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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