My Inquiry
My Account
Texas Instruments OPA3691IDBQR
- Part No.:
- OPA3691IDBQR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
OPA3691IDBQR.pdf
- Description:
- IC OPAMP CFA 3 CIRCUIT 16SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,394
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
OPA3691IDBQR from Texas Instruments is a triple-channel, current-feedback operational amplifier optimized for wideband video, ADC buffering, and high-speed imaging applications. It delivers 280MHz unity-gain bandwidth, 2100V/µs slew rate, ±4.0V output swing (±5V supply), 190mA output current per channel, and 5.1mA/ch quiescent current - enabling RGB line driving and single-supply +5V ADC input conditioning with minimal headroom.
For engineers reviewing the OPA3691IDBQR datasheet, OPA3691IDBQR pinout, OPA3691IDBQR application, or OPA3691IDBQR equivalent, this page provides verified electrical specifications, SSOP-16 package details, disable-control timing behavior, thermal derating guidance, and validated alternatives for high-frequency analog signal path design.
Technical Context
The OPA3691IDBQR employs a current-feedback architecture with transimpedance gain (ZOL) of 225kΩ (±5V), enabling bandwidth stability across gains - 280MHz at G = +1, 225MHz at G = +2, and 210MHz at G = +5. Its output stage supports rail-to-rail-capable swing (±4.0V) with <1V headroom on ±5V supplies and delivers >160mA sourcing/sinking into 100Ω loads while maintaining low crossover distortion.
Each channel integrates an independent disable control (DIS A/B/C) that reduces supply current to <150µA/ch when pulled LOW, with 25ns enable time and 400ns disable time. The device operates over –40°C to +85°C, features 100°C/W θJA in SSOP-16, and maintains <0.17% differential gain / 0.07° differential phase error in NTSC video signals.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Small-Signal Bandwidth (G = +1) | 280MHz - enables stable unity-gain video amplification without peaking beyond 0.2dB. |
| Slew Rate | 2100V/µs - supports clean 5VPP step response in <2ns with <12ns 0.02% settling. |
| Output Current (per channel) | ±190mA - drives 75Ω video lines or 100Ω ADC inputs with >3VPP swing on +5V supply. |
| Quiescent Current (3 ch) | 15.3mA max (±5V) - enables low-power portable instrumentation with disable control reducing to <450µA total. |
| Input Voltage Noise | 1.7nV/√Hz (>1MHz) - preserves SNR in broadband signal chains up to 200MHz. |
| Differential Gain/Phase | 0.07%/0.02° (NTSC, RL = 150Ω) - meets broadcast-grade video fidelity requirements. |
| Disable Control Threshold | Enable VIL ≤1.5V, VIH ≥3.3V - compatible with standard 3.3V logic for power-gating channels. |
Pinout & Package
OPA3691IDBQR is packaged in a 16-pin SSOP (DBQ) surface-mount package with 0.65mm pitch, 5.0mm × 6.2mm body size, and exposed thermal pad (not electrically connected). Thermal resistance θJA = 100°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (–IN A) | Inverting input, Channel A | Current-summing node for feedback network; requires matched impedance (e.g., 402Ω) for G = +2. |
| 2 (+IN A) | Noninverting input, Channel A | High-impedance input (100kΩ || 2pF); bias current ≤45µA ensures minimal DC offset in precision buffers. |
| 3 (DIS B) | Disable control, Channel B | Active-low logic input; pulls output to high-Z and cuts supply current to <150µA/ch when LOW. |
| 4 (–IN B) | Inverting input, Channel B | Independent current-feedback node; isolated from other channels to prevent crosstalk (<–80dBc). |
| 5 (+IN B) | Noninverting input, Channel B | DC-biased via external resistive divider in single-supply configurations (e.g., 806Ω to +5V/ground). |
| 6 (DIS C) | Disable control, Channel C | Enables independent power gating per channel; no internal pull-up - must be externally held HIGH for normal operation. |
| 7 (–IN C) | Inverting input, Channel C | Terminated to match source impedance (e.g., 75Ω for video) to minimize reflections up to 200MHz. |
| 8 (+IN C) | Noninverting input, Channel C | Used as common-mode reference point in ADC driver circuits (e.g., tied to ADS831 VCM pin). |
| 9 (DIS A) | Disable control, Channel A | Make-before-break timing prevents floating outputs during channel switching in RGB multiplexers. |
| 10 (+VS) | Positive supply | Accepts +5V to +12V single supply or ±2.5V to ±6V dual supply; decoupling with 0.1µF + 6.8µF required. |
| 11 (OUT A) | Output, Channel A | Capable of 190mA sourcing/sinking; closed-loop output impedance = 0.03Ω at 100kHz for low distortion into cables. |
| 12 (–VS) | Negative supply | Required for dual-supply operation; tied to ground for single +5V use (with proper biasing of inputs/outputs). |
| 13 (OUT B) | Output, Channel B | Drives independent load (e.g., green channel in RGB); maintains >190MHz bandwidth into 100Ω. |
| 14 (+VS) | Positive supply (redundant) | Second +VS pin improves power delivery integrity; must be connected to same net as Pin 10. |
| 15 (OUT C) | Output, Channel C | Supports simultaneous 3-channel high-speed acquisition (e.g., triple ADC front-end) with <10ps skew. |
| 16 (–VS) | Negative supply (redundant) | Second –VS pin enhances ground return path; must be connected to same net as Pin 12. |
Key Features
| Feature | Design Value |
|---|---|
| Triple current-feedback architecture | Delivers consistent 200+ MHz bandwidth across gains +1 to +10 - eliminating gain-bandwidth trade-off in video/ADC drivers. |
| Wideband +5V operation | 190MHz bandwidth and 850V/µs slew rate on single +5V supply - enables compact, low-voltage portable instruments. |
| High-output-current stage | ±190mA drive capability with <1V output headroom - supports 75Ω cable driving and 100Ω ADC termination without external buffers. |
| Per-channel disable control | Reduces total supply current to <450µA (all channels disabled) with 25ns wake-up - ideal for power-managed imaging systems. |
| Low-distortion video performance | 0.07% differential gain / 0.02° differential phase at NTSC frequencies - meets SMPTE RP-168 and ITU-R BT.601 standards. |
| Improved high-frequency pinout | Optimized layout minimizes parasitic capacitance between inverting inputs and outputs - critical for >150MHz stability with 402Ω feedback. |
Applications
| RGB Amplifiers | ADC Buffers |
|---|---|
|
Use Scenario: Driving red/green/blue component video signals from graphics processors to display panels or capture cards. IC Role / Device Role / Timing Role: Triple-channel voltage buffer with independent disable control for source switching and power gating. Use Value: 280MHz bandwidth and 0.07% differential gain preserve color fidelity and edge sharpness in HD/UXGA displays. |
Use Scenario: Conditioning analog inputs to high-speed CMOS ADCs (e.g., ADS831, 80MSPS) in digitizers and oscilloscopes. IC Role / Device Role / Timing Role: Single-supply +5V driver delivering 3VPP swing with <12ns settling to meet SFDR requirements. Use Value: 190mA output current drives 100Ω ADC input impedance while maintaining >150MHz full-power bandwidth. |
| High-Speed Imaging Channels | Cable Drivers |
|
Use Scenario: Signal conditioning in medical ultrasound receivers or industrial machine vision sensors requiring parallel analog channel processing. IC Role / Device Role / Timing Role: Triple-channel wideband amplifier with matched propagation delay (<10ps) across channels. Use Value: Low inter-channel crosstalk (<–80dBc) and identical AC response ensure phase-coherent multi-channel sampling. |
Use Scenario: Driving long coaxial cables (e.g., 75Ω SDI, RGB, or test equipment interconnects) with minimal signal degradation. IC Role / Device Role / Timing Role: Active line driver with 0.03Ω closed-loop output impedance and 75Ω source termination capability. Use Value: 2100V/µs slew rate and 280MHz bandwidth maintain rise/fall times <2ns over 10m cables at 1080p60 rates. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar wideband current-feedback amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA3690IDBQR | Triple voltage-feedback op amp; 280MHz GBW but lower slew rate (1000V/µs), higher supply current (7.5mA/ch), no disable control. | Lacks per-channel shutdown; less suitable for power-constrained portable instruments or dynamic channel gating. | Select OPA3690IDBQR only if voltage-feedback topology is required for DC-coupled precision gain stages with lower noise floor. |
| OPA2691IDGKR | Dual-channel version; identical AC specs (280MHz, 2100V/µs) and disable control, but only two channels in 8-pin VSSOP. | Not suitable for triple-channel systems (e.g., RGB, 3-phase sensor interfaces); saves board space where only two channels needed. | Choose OPA2691IDGKR when system requires exactly two high-speed channels and PCB area is constrained. |
Compared with OPA3690IDBQR and OPA2691IDGKR, the OPA3691IDBQR uniquely combines triple-channel count, current-feedback bandwidth scalability, per-channel disable, and 5.1mA/ch efficiency - making it the only option for compact, power-aware, three-channel video or ADC front-ends.
Availability
OPA3691IDBQR is available at Aetrix Electronics and suitable for RGB amplifiers, ADC buffers, and high-speed imaging channels requiring stable component supply, extended temperature support (–40°C to +85°C), and SSOP-16 packaging compatibility.
Supply support for OPA3691IDBQR 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 OPA3691IDBQR belongs to TI's OPAx691 family of current-feedback amplifiers, designed specifically for demanding wideband applications including video distribution, high-speed data acquisition, and portable test equipment where bandwidth, power efficiency, and channel density are critical.
FAQ
What supply voltages does the OPA3691IDBQR support?
The OPA3691IDBQR operates from ±2.5V to ±6V dual supply or +5V to +12V single supply. At ±5V, it delivers 280MHz bandwidth and ±4.0V output swing; on +5V, it achieves 190MHz bandwidth with 1V–4V output range. Minimum single-supply voltage is +4V, maximum is +12V - all specified over –40°C to +85°C.
How does the disable function work on the OPA3691IDBQR?
Each channel of the OPA3691IDBQR has a dedicated active-low disable pin (DIS A/B/C). Pulling any DIS pin LOW reduces its channel's supply current to <150µA while placing the output in high-impedance state. Enable time is 25ns, disable time is 400ns, and the feature uses make-before-break timing to prevent floating outputs during switching - critical in RGB multiplexers.
Can the OPA3691IDBQR drive 75Ω video cables directly?
Yes - the OPA3691IDBQR delivers ±190mA output current and features 0.03Ω closed-loop output impedance at 100kHz, enabling direct 75Ω cable driving. When configured with 82.5Ω series output resistors and proper termination, it achieves <0.17% differential gain and <0.07° differential phase error in NTSC signals, meeting broadcast video standards without external buffers.
What is the thermal performance of the OPA3691IDBQR in SSOP-16 package?
The OPA3691IDBQR in DBQ (SSOP-16) package has a thermal resistance θJA of 100°C/W. With 15.3mA max quiescent current (±5V) and 190mA max output current per channel, power dissipation must be managed via PCB copper area and optional thermal vias under the exposed pad (though not electrically connected). Derating is required above +70°C ambient per TI's thermal guidelines.
Is the OPA3691IDBQR suitable for driving ADC inputs in single-supply systems?
Yes - the OPA3691IDBQR is explicitly characterized for +5V single-supply operation, delivering >150MHz bandwidth with 3VPP output swing into 100Ω loads. Its input common-mode range extends to within 1.5V of either rail, and output swings from 1V to 4V, making it ideal for driving modern CMOS ADCs like the ADS831 that require 2VPP inputs centered at VCM.
OPA3691IDBQR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-SSOP (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Current Feedback
- Number of Circuits:
- 3
- Output Type:
- -
- Slew Rate:
- 2100V/µs
- Gain Bandwidth Product:
- 280 MHz
- -3db Bandwidth:
- 280 MHz
- Current - Input Bias:
- 5 µA
- Voltage - Input Offset:
- 800 µV
- Current - Supply:
- 15.3mA
- 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:
- 16-SSOP
OPA3691IDBQR FAQ
1.How can I place an order for OPA3691IDBQR through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA3691IDBQR 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 OPA3691IDBQR reliable?
The price and inventory of OPA3691IDBQR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA3691IDBQR is usually 5 days.
3.What payment methods are accepted for OPA3691IDBQR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA3691IDBQR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA3691IDBQR?
OPA3691IDBQR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA3691IDBQR 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 OPA3691IDBQR?
For technical support, including OPA3691IDBQR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA3691IDBQR requirements.
6.How does Aetrix verify that OPA3691IDBQR is sourced from the original manufacturer or authorized distributors?
All OPA3691IDBQR 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 OPA3691IDBQR meets industry standards.
7.What is the process for return or replacement of OPA3691IDBQR?
All OPA3691IDBQR units undergo pre-shipment inspection (PSI). If there is an issue with OPA3691IDBQR, 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 OPA3691IDBQR part is unused and in its original packaging.
Return procedure for OPA3691IDBQR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
OPA3691IDBQR Tags
-
LM358DT
STMicroelectronics
-
LM358DR
Texas Instruments
-
LM2904DR
Texas Instruments
-
LM358ADR
Texas Instruments
-
LM2904DGKR
Texas Instruments
-
LM324DR
Texas Instruments
-
MCP6006T-E/OT
Microchip Technology
-
MCP6006UT-E/OT
Microchip Technology
-
LM324PWR
Texas Instruments
-
LM2902PWR
Texas Instruments
-
LM2902DR
Texas Instruments
-
LM358P
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
