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Texas Instruments OPA3690IDBQR
- Part No.:
- OPA3690IDBQR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
OPA3690IDBQR.pdf
- Description:
- IC OPAMP VFB 3 CIRCUIT 16SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,619
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Product details
Overview
OPA3690IDBQR from Texas Instruments is a triple, wideband, voltage-feedback operational amplifier with individual disable control per channel, designed for high-fidelity video and imaging signal conditioning. It delivers 220MHz bandwidth at G = +2, 1800V/µs slew rate, ±4.0V output swing on ±5V supplies, and 190mA output current - enabling RGB line driving and ADC input buffering in compact single-supply systems.
For engineers reviewing the OPA3690IDBQR datasheet, OPA3690IDBQR pinout, OPA3690IDBQR application, or OPA3690IDBQR equivalent, key selection criteria include its 3-channel independent disable capability, 5.5mA/ch quiescent current, SSOP-16 package thermal resistance (100°C/W), and verified performance under +5V single-supply operation with 190mA drive into 100Ω loads.
Technical Context
The OPA3690IDBQR employs a novel voltage-feedback architecture that achieves current-feedback-class slew rate (1800V/µs) while maintaining unity-gain stability. Its input stage uses transconductance steering between buffered inputs to enable high-speed error correction without fixed-bias current limitations.
The output stage delivers symmetrical sourcing/sinking current (±190mA) with minimal headroom: output swings to within 1V of either rail on +5V supply (1.0V to 4.0V), and maintains 0.1dB gain flatness to 30MHz at G = +2. Each channel features a dedicated disable pin (DIS A/B/C) enabling independent power-down with <200µA disabled supply current and 70dB off-isolation at 5MHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Bandwidth (G = +2) | 220MHz - supports full NTSC/PAL video bandwidth and >100MHz ADC sampling clock harmonics |
| Slew Rate | 1800V/µs - enables clean 4VPP step response in <3ns with <12ns 0.02% settling |
| Output Current | ±190mA - drives 75Ω video lines or 100Ω ADC inputs without external buffers |
| Supply Range | ±2.5V to ±6V dual or +5V to +12V single - operates from standard logic rails with no auxiliary supplies |
| Disable Current | <200µA per channel - reduces total system power by >95% when channels are idle |
| Input Noise | 5.5nV/√Hz - preserves SNR in low-level imaging and precision ADC front-ends |
| Differential Phase/Gain | 0.01° / 0.06% - meets broadcast-grade video fidelity requirements (NTSC) |
Pinout & Package
OPA3690IDBQR is housed in a 16-pin SSOP (Shrink Small Outline Package) with 0.65mm pitch, JEDEC MO-153 compliant, thermal resistance θJA = 100°C/W. The package supports automated placement and reflow soldering for high-density PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 5, 9 (–IN A/B/C) | Inverting Input | Differential input node for each op amp channel; requires matched source impedance for optimal CMRR |
| 2, 6, 10 (+IN A/B/C) | Noninverting Input | DC-biased input for single-supply operation; supports 1.5V–3.5V common-mode range on +5V supply |
| 3, 7, 11 (DIS A/B/C) | Channel Disable Control | Active-low logic input; <1.5V disables channel, >3.3V enables; 75µA max bias current |
| 4, 12 (+VS) | Positive Supply | Connects to +5V (or +12V); decoupling capacitor required within 1cm of pin |
| 8, 16 (–VS) | Negative Supply | Connects to –5V (dual) or ground (single); separate ground plane recommended |
| 13, 14, 15 (OUT A/B/C) | Amplifier Output | Capable of driving 100Ω loads directly; 0.04Ω closed-loop output impedance minimizes gain error |
Key Features
| Feature | Design Value |
|---|---|
| Triple independent amplifiers | Enables RGB channel separation or multi-path signal conditioning without inter-channel crosstalk degradation (–64dBc typical) |
| Per-channel disable control | Reduces dynamic power in time-multiplexed systems (e.g., sequential ADC sampling) without PCB layout changes |
| Single-supply +5V operation | Eliminates negative rail requirement while delivering ±4V swing via internal level-shifting output stage |
| Low distortion at high frequency | –77dBc 2nd-harmonic at 5MHz/100Ω enables >10-bit ENOB preservation in 50Msps+ ADC interfaces |
| Thermal robustness | Rated for –40°C to +85°C ambient; 150°C junction limit with 100°C/W θJA allows 1W dissipation in typical airflow |
Applications
| RGB Video Line Driver | High-Speed ADC Input Buffer |
|---|---|
Use Scenario: Driving three 75Ω coaxial cables from an FPGA or graphics processor RGB output. IC Role / Device Role / Timing Role: Triple op amp configured as unity-gain followers with DC-coupled outputs, preserving pixel timing integrity up to 165MHz pixel clocks. Use Value: Delivers 0.01° differential phase and 0.06% differential gain for broadcast-compliant video; eliminates need for discrete emitter followers or transformer coupling. | Use Scenario: Conditioning analog signals before sampling by TI ADS8xx-series 16-bit, 100+Msps ADCs. IC Role / Device Role / Timing Role: Single-supply G = +2 buffer with ac-coupled input and 2.5V common-mode bias, matching ADC input requirements. Use Value: 220MHz bandwidth and 1800V/µs slew rate prevent aperture uncertainty errors; 5.5nV/√Hz noise contributes <0.5LSB noise floor at 16-bit resolution. |
| Medical Imaging Signal Chain | Portable Instrument Front-End |
Use Scenario: Amplifying low-amplitude, high-frequency signals from ultrasound transducer arrays in handheld scanners. IC Role / Device Role / Timing Role: Triple-channel variable-gain amplifier stage with independent disable for beamforming channel gating. Use Value: 190mA output current drives capacitive transducer loads; per-channel disable cuts power during receive blanking intervals without signal interruption. | Use Scenario: Signal conditioning in battery-powered oscilloscope front-ends requiring wide dynamic range and low power. IC Role / Device Role / Timing Role: Low-noise, high-slew-rate gain block preceding programmable gain amplifier and anti-alias filter. Use Value: 5.5mA/ch quiescent current extends battery life; 100°C/W θJA enables operation in sealed enclosures without forced cooling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar wideband op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2690IDR | Dual-channel version; identical AC specs but no DIS pins; SO-8 package | Lacks per-channel disable; unsuitable for time-gated or power-cycled multi-channel systems | Select when only two channels are needed and disable functionality is unnecessary |
| LMH6703MA/NOPB | Single-channel; 1.8GHz GBW; higher 12.5mA supply current; no disable function | Higher bandwidth but no multi-channel integration or power management; requires three devices for RGB | Select when >500MHz small-signal bandwidth is mandatory and board space permits discrete implementation |
Compared with OPA2690IDR and LMH6703MA/NOPB, the OPA3690IDBQR uniquely combines triple-channel integration, per-channel disable, and 220MHz bandwidth in a single SSOP-16 package - reducing component count by 2× versus discrete solutions and enabling dynamic power scaling unattainable with dual or single op amps.
Availability
OPA3690IDBQR is available at Aetrix Electronics and suitable for RGB video line driving, high-speed ADC input buffering, and portable instrument front-end designs requiring stable component supply across industrial temperature ranges.
Supply support for OPA3690IDBQR 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 data converters.
The OPA3690IDBQR belongs to TI's OPAx690 family of wideband voltage-feedback op amps, engineered specifically for demanding video, imaging, and high-speed data acquisition systems where bandwidth, output drive, and power efficiency must coexist.
FAQ
What is the maximum operating supply voltage for the OPA3690IDBQR?
The OPA3690IDBQR supports a maximum dual-supply voltage of ±6.0V and a maximum single-supply voltage of +12V. Absolute maximum ratings specify ±6.5V on the power pins; operation beyond ±6.0V or +12V risks permanent damage. For reliable long-term operation, TI recommends staying within the specified limits - e.g., ±5V or +5V supplies for most video and ADC applications. The OPA3690IDBQR maintains full performance across this range, including 220MHz bandwidth at G = +2 on ±5V.
Does the OPA3690IDBQR require external compensation for unity-gain stability?
No, the OPA3690IDBQR is internally compensated for unity-gain stability across its full operating temperature range (–40°C to +85°C). It does not require external compensation components in standard configurations, including G = +1, +2, or +10. The datasheet confirms stability with 402Ω feedback resistors and 100Ω loads, and typical characteristics show no peaking >4dB at G = +1. This simplifies design for video line drivers and ADC buffers where layout-sensitive compensation networks would degrade high-frequency performance.
How does the disable function affect output state in the OPA3690IDBQR?
When the DIS pin for any channel is pulled LOW (<1.5V), that channel's output enters a high-impedance state with <4pF capacitance and 70dB off-isolation at 5MHz, while supply current drops to <200µA per disabled channel. The output does not short or clamp - it floats, preserving signal integrity in multiplexed systems. Pulling DIS HIGH (>3.3V) or leaving it open enables normal operation. Turn-on/turn-off glitch is limited to ±50mV and ±20mV respectively, ensuring clean switching in time-division applications. This behavior is confirmed in the Electrical Characteristics table under DISABLE section.
Can the OPA3690IDBQR drive 75Ω video loads directly without series termination?
Yes, the OPA3690IDBQR can drive 75Ω video loads directly using its 190mA output current capability and low 0.04Ω closed-loop output impedance. In standard RGB line driver configurations (G = +1, dc-coupled), it delivers full 1V–4V swing into 75Ω with <0.01° differential phase error. TI's reference design (Figure 36) uses 402Ω feedback and 75Ω load without series resistors, and the datasheet specifies output voltage swing down to 100Ω loads. For longest trace lengths, a 33Ω series resistor at the output may be added to dampen reflections - but it is not required for basic compliance.
What is the input common-mode voltage range for OPA3690IDBQR on a +5V single supply?
On a +5V single supply, the OPA3690IDBQR supports an input common-mode voltage range of 1.5V to 3.5V at 25°C, degrading to 1.6V–3.4V at +70°C and 1.7V–3.3V at +85°C. This 2V-wide range centers on the 2.5V bias point required for ac-coupled ADC interfaces. The specification is validated in the +5V Electrical Characteristics table under "Least Positive Input Voltage" and "Most Positive Input Voltage". Operation outside this range causes increased offset voltage and reduced CMRR, so input coupling networks must ensure signals remain within these bounds.
OPA3690IDBQR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-SSOP (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Amplifier Type:
- Voltage Feedback
- Number of Circuits:
- 3
- Output Type:
- Differential
- Slew Rate:
- 1800V/µs
- Gain Bandwidth Product:
- 300 MHz
- -3db Bandwidth:
- 500 MHz
- Current - Input Bias:
- 5 µA
- Voltage - Input Offset:
- 1 mV
- Current - Supply:
- 16.5mA
- 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
OPA3690IDBQR FAQ
1.How can I place an order for OPA3690IDBQR through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA3690IDBQR 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 OPA3690IDBQR reliable?
The price and inventory of OPA3690IDBQR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA3690IDBQR is usually 5 days.
3.What payment methods are accepted for OPA3690IDBQR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA3690IDBQR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA3690IDBQR?
OPA3690IDBQR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA3690IDBQR 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 OPA3690IDBQR?
For technical support, including OPA3690IDBQR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA3690IDBQR requirements.
6.How does Aetrix verify that OPA3690IDBQR is sourced from the original manufacturer or authorized distributors?
All OPA3690IDBQR 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 OPA3690IDBQR meets industry standards.
7.What is the process for return or replacement of OPA3690IDBQR?
All OPA3690IDBQR units undergo pre-shipment inspection (PSI). If there is an issue with OPA3690IDBQR, 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 OPA3690IDBQR part is unused and in its original packaging.
Return procedure for OPA3690IDBQR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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