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Texas Instruments OPA2691I-14DRG4
- Part No.:
- OPA2691I-14DRG4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA2691I-14DRG4.pdf
- Description:
- IC OPAMP CFA 2 CIRCUIT 14SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,904
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Product details
Overview
OPA2691I-14DRG4 from Texas Instruments is a dual wideband current-feedback operational amplifier with independent disable control per channel, specified for ±5V or +5V operation. It delivers 190MHz small-signal bandwidth (G = +2), 2100V/µs slew rate, ±4.0V output swing, 190mA output current, and 5.1mA/ch quiescent supply current - enabling high-fidelity RGB line driving and single-supply ADC input buffering in compact video and instrumentation systems.
For engineers reviewing the OPA2691I-14DRG4 datasheet, OPA2691I-14DRG4 pinout, OPA2691I-14DRG4 application, or OPA2691I-14DRG4 equivalent, key selection criteria include disable timing (25ns enable / 400ns disable), SO-14 package thermal resistance (100°C/W), channel-to-channel crosstalk (–86dBc at 5MHz), and single-supply 1V–4V output swing capability with <±50mV turn-on glitch.
Technical Context
The OPA2691I-14DRG4 employs a current-feedback architecture with transimpedance gain of 225kΩ (min, ±5V) and unity-gain stability up to 280MHz. Its output stage supports rail-swing headroom as low as 1V on +5V supply while delivering >160mA sourcing/sinking current into 100Ω loads.
Each channel features an independent disable pin (DIS A/B) that places the output in high-impedance state and reduces supply current to <800µA/ch when pulled LOW. Disable functionality is exclusive to the SO-14 package variant and is not available in SO-8 versions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Small-Signal Bandwidth (G = +2) | 190MHz min at +25°C on +5V supply - enables full NTSC/PAL video bandwidth and fast ADC sampling front-ends. |
| Slew Rate | 2100V/µs min (±5V), 850V/µs min (+5V) - supports clean 2V–5V step fidelity without slewing distortion in pulse applications. |
| Output Current | ±190mA min (±5V), ±160mA min (+5V) - drives 75Ω video lines, 100Ω ADC inputs, or parallel loads without external buffers. |
| Quiescent Current | 10.2mA max (±5V), 9mA max (+5V) - allows dual-channel high-speed amplification within tight power budgets. |
| Disable Supply Current | <800µA/ch max (SO-14 only) - reduces system standby power by >92% per channel during inactive periods. |
| Input Voltage Noise | 1.7nV/√Hz typ above 1MHz - preserves SNR in wideband signal chains such as imaging and RF IF stages. |
| Channel Crosstalk | –86dBc at 5MHz - ensures matched I/Q channel integrity in communications and differential ADC driver topologies. |
Pinout & Package
OPA2691I-14DRG4 is housed in a 14-pin SOIC (SO-14) package with exposed pad (D package designation), θJA = 100°C/W, rated for –40°C to +85°C operation. Pin 1 is located at the notch end, with pins numbered counter-clockwise.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (NC) | No Connection | Unbonded die pad - must remain floating or grounded per layout guidelines; no electrical function. |
| 2 (–In A) | Inverting Input, Channel A | Current-summing node for feedback network; requires 37Ω inverting input resistance for stable current-feedback operation. |
| 3 (+In A) | Noninverting Input, Channel A | High-impedance input (100kΩ || 2pF); sets common-mode range (1.5V–3.5V on +5V supply). |
| 4 (DIS A) | Disable Control, Channel A | Active-LOW logic input; <1.5V disables Channel A, >3.3V enables; 75µA bias current max. |
| 5 (–VS) | Negative Supply Rail | Connect to ground (single-supply) or –5V (dual-supply); decoupling required within 1cm. |
| 6 (DIS B) | Disable Control, Channel B | Independent active-LOW control for Channel B; identical timing and voltage thresholds to DIS A. |
| 7 (+In B) | Noninverting Input, Channel B | Matched to Channel A; enables precise differential or I/Q signal processing with <0.1° phase mismatch. |
| 8 (–In B) | Inverting Input, Channel B | Current-summing node; same 37Ω nominal resistance as Channel A for gain-setting consistency. |
| 9 (Out A) | Output, Channel A | Capable of ±190mA drive; output impedance 0.03Ω at 100kHz - minimizes gain error under load. |
| 10 (NC) | No Connection | Unbonded; leave unconnected or tie to ground per TI layout recommendations. |
| 11 (+VS) | Positive Supply Rail | Accepts +5V to +12V; internal regulation supports stable biasing across supply range. |
| 12 (NC) | No Connection | Unbonded; no routing or connection required. |
| 13 (NC) | No Connection | Unbonded; maintain clearance per SO-14 footprint. |
| 14 (Out B) | Output, Channel B | Electrically identical to Out A; supports wired-OR multiplexing with <20mV switching glitch when paired. |
Key Features
| Feature | Design Value |
|---|---|
| Independent per-channel disable | Enables dynamic channel gating in video multiplexers and power-managed ADC interfaces without PCB redesign. |
| Single-supply 1V–4V output swing | Delivers full 3Vpp signal on +5V rail with <1V headroom - eliminates need for level-shifting in embedded video systems. |
| 2100V/µs slew rate (±5V) | Preserves edge integrity in 100+MHz pulse and imaging waveforms without rate-limiting distortion. |
| –86dBc channel crosstalk @ 5MHz | Ensures >60dB isolation between I/Q paths in software-defined radio and broadband test equipment. |
| 1.7nV/√Hz input voltage noise | Maintains >70dB SNR in 10MHz–200MHz signal chains, critical for high-resolution digitization and spectrum analysis. |
| 25ns enable time | Supports sub-40ns channel switching in real-time video routing and adaptive filter banks. |
Applications
| RGB Line Driver | Differential ADC Driver |
|---|---|
Use Scenario: Driving three synchronized analog RGB signals from graphics processor to display interface over 75Ω coaxial cables. IC Role / Device Role / Timing Role: Dual-channel current-feedback op amp providing gain-of-two buffering with matched propagation delay (<100ps skew) and <0.1% differential gain error. Use Value: Enables 1080p60 video transmission with <0.07% differential gain and 0.02° differential phase error per channel, meeting SMPTE 253M compliance. | Use Scenario: Converting single-ended sensor or IF signals to differential format for ADS823 10-bit, 60MSPS ADC. IC Role / Device Role / Timing Role: Dual amplifier configured as gain-of-10 in/diff-out driver with common-mode bias set to +2.5V. Use Value: Delivers >150MHz full-scale input bandwidth and <–70dBc harmonic distortion at 5MHz, preserving ENOB >9.2 bits. |
| Wired-OR Video Multiplexer | High-Speed Active Filter |
Use Scenario: Selecting among four camera inputs onto one shared video bus using make-before-break switching during vertical blanking interval. IC Role / Device Role / Timing Role: Four OPA2691I-14DRG4 devices with outputs tied via 82.5Ω resistors; DIS pins sequenced to ensure continuous line control. Use Value: Achieves <20mV switching glitch and <–70dB off-isolation, eliminating visible artifacts during channel transitions in broadcast gear. | Use Scenario: Implementing 5th-order elliptic low-pass filter at 50MHz cutoff for RF receiver IF stage. IC Role / Device Role / Timing Role: Fixed-gain current-feedback block inside passive RC ladder; bandwidth invariant with filter Q-factor. Use Value: Maintains flat group delay and <0.5dB passband ripple up to 45MHz due to constant 190MHz GBW across gain settings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual wideband current-feedback amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2690IDR | Voltage-feedback architecture; unity-gain stable; 280MHz bandwidth; 1800V/µs slew rate; no disable pin. | Better DC accuracy (±0.3mV Vos), lower distortion at low frequencies, but bandwidth drops to 120MHz at G = +5. | Select OPA2690IDR when DC precision and low-frequency THD dominate over disable functionality and wideband gain flatness. |
| OPA2681U | Current-feedback; 220MHz bandwidth (G = +2); 1.2mA/ch lower quiescent current; no disable; SO-8 only. | Lower power (3.9mA/ch), smaller footprint, but lacks SO-14 disable pins and has higher 3rd-harmonic distortion (–68dBc vs –74dBc). | Select OPA2681U for space-constrained, always-on video buffers where disable is unnecessary and power is critical. |
Compared with OPA2690IDR and OPA2681U, the OPA2691I-14DRG4 uniquely combines per-channel disable, SO-14 thermal performance (100°C/W), and consistent 190MHz bandwidth across G = +1 to +10 - making it optimal for power-aware, multi-channel video and ADC driver systems requiring glitch-controlled switching.
Availability
OPA2691I-14DRG4 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, broadcast, and test equipment programs.
Supply support for OPA2691I-14DRG4 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, embedded processing, and digital signal technologies, with decades of innovation in high-speed op amps and precision signal chain solutions.
The OPA2691I-14DRG4 belongs to TI's OPA269x family of current-feedback op amps, engineered specifically for wideband video, imaging, and high-speed data acquisition systems demanding low power, high output drive, and flexible power management.
FAQ
What is the maximum operating supply voltage for the OPA2691I-14DRG4?
The OPA2691I-14DRG4 supports a maximum operating voltage of ±6V for dual-supply use or +12V for single-supply operation. Absolute maximum ratings specify ±6.5V on either supply rail. Exceeding these limits risks permanent damage. Operation at +12V single supply maintains 190MHz bandwidth and 160mA output drive, but quiescent current increases to 10.4mA max.
Does the OPA2691I-14DRG4 support true rail-to-rail input and output?
No, the OPA2691I-14DRG4 is not a rail-to-rail device. On +5V supply, its input common-mode range is 1.5V to 3.5V, and output swing is 1.0V to 4.0V (min) with 100Ω load. This 1V headroom requirement is significantly better than legacy wideband op amps but does not reach the rails. For rail-to-rail needs, consider TI's OPA837 or OPA863 families.
How does the disable function behave during power-up of the OPA2691I-14DRG4?
During power-up, the OPA2691I-14DRG4 enters normal operation if DIS pins are left open or pulled HIGH (>3.3V). If DIS pins are held LOW during startup, both channels remain disabled until the control voltage exceeds the enable threshold (min 3.3V). TI recommends tying DIS pins to +VS through a 10kΩ resistor for default-enable behavior with robust noise immunity.
Can the OPA2691I-14DRG4 drive a 50Ω load directly in a 50Ω system?
Yes - the OPA2691I-14DRG4 can drive a 50Ω load directly, delivering ±140mA min output current at +85°C. However, for optimal 50Ω source termination and minimal reflections, use a series 25Ω resistor at the output (for total 75Ω Zo) or configure as a current-feedback gain-of-two with 402Ω feedback and 50Ω load to ground. Output impedance is 0.03Ω at 100kHz, ensuring minimal gain error.
Is the OPA2691I-14DRG4 pin-compatible with other OPA269x variants?
No - the OPA2691I-14DRG4 (SO-14) is not pin-compatible with SO-8 variants like OPA2691IDR. The SO-14 package adds dedicated DIS A/DIS B pins (Pins 4 and 6) and two additional NC pins, while SO-8 omits disable functionality entirely. Board designs must be re-routed to migrate between packages; no drop-in replacement exists.
OPA2691I-14DRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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-14DRG4 FAQ
1.How can I place an order for OPA2691I-14DRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2691I-14DRG4 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-14DRG4 reliable?
The price and inventory of OPA2691I-14DRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2691I-14DRG4 is usually 5 days.
3.What payment methods are accepted for OPA2691I-14DRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2691I-14DRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2691I-14DRG4?
OPA2691I-14DRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2691I-14DRG4 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-14DRG4?
For technical support, including OPA2691I-14DRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2691I-14DRG4 requirements.
6.How does Aetrix verify that OPA2691I-14DRG4 is sourced from the original manufacturer or authorized distributors?
All OPA2691I-14DRG4 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-14DRG4 meets industry standards.
7.What is the process for return or replacement of OPA2691I-14DRG4?
All OPA2691I-14DRG4 units undergo pre-shipment inspection (PSI). If there is an issue with OPA2691I-14DRG4, 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-14DRG4 part is unused and in its original packaging.
Return procedure for OPA2691I-14DRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
OPA2691I-14DRG4 Tags
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