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Texas Instruments OPA3690IDBQT
- Part No.:
- OPA3690IDBQT
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
OPA3690IDBQT.pdf
- Description:
- IC OPAMP VFB 3 CIRCUIT 16SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:317
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Product details
Overview
OPA3690IDBQT from Texas Instruments is a triple, wideband, voltage-feedback operational amplifier with individual disable control per channel, designed for high-fidelity video and high-speed analog signal conditioning. It delivers 220MHz small-signal bandwidth (G = +2), 1800V/µs slew rate, ±4.0V output swing on ±5V supplies, and 190mA output current - enabling RGB line driving, ADC input buffering, and portable instrumentation.
For engineers reviewing the OPA3690IDBQT datasheet, OPA3690IDBQT pinout, OPA3690IDBQT application, or OPA3690IDBQT equivalent, key selection criteria include its unity-gain stability, 3-channel independent disable capability, 5.5mA/ch quiescent current, low 5.5nV/√Hz input voltage noise, and SSOP-16 package compatibility with space-constrained high-speed layouts.
Technical Context
The OPA3690IDBQT employs a novel voltage-feedback architecture with a transconductance-based input stage that enables 1800V/µs slew rate while maintaining 5.5mA/ch supply current - diverging from conventional fixed-bias current-steering topologies. Its output stage supports rail-swing-limited sourcing/sinking up to ±190mA into 100Ω loads without crossover distortion.
Each of the three channels features an independent disable pin (DIS A/B/C) that reduces supply current to <300µA/ch and places the output in high-impedance state within 25ns enable time. The device operates from ±2.5V to ±6V dual supplies or +5V to +12V single supply, with input common-mode range extending to ±3.5V (±5V supply) and output swing to ±3.9V (no load).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Small-Signal Bandwidth (G = +2) | 220MHz at ±5V - supports full HD video signal integrity up to 1080p60 with minimal group delay variation. |
| Slew Rate | 1800V/µs - ensures faithful reproduction of fast transient signals (e.g., ADC sampling edges, pulse imaging waveforms). |
| Output Current (sourcing/sinking) | ±190mA - drives 75Ω video lines, 100Ω ADC inputs, or parallel termination networks without external buffers. |
| Input Voltage Noise | 5.5nV/√Hz - preserves SNR in precision signal chains where op amp noise dominates system floor. |
| Disable Supply Current | <300µA per channel - enables dynamic power gating in multi-channel systems (e.g., RGB+sync, I/Q receivers) for battery life extension. |
| Differential Gain/Phase Error | 0.06% / 0.01° (NTSC) - meets broadcast-grade video fidelity requirements without post-compensation. |
| Quiescent Current (3 ch) | 16.5mA max at ±5V - balances performance and thermal density in compact PCB layouts. |
Pinout & Package
OPA3690IDBQT is housed in a 16-pin SSOP (Shrink Small Outline Package) with 0.65mm lead pitch, optimized for high-density routing and thermal dissipation in video and imaging modules. Pin spacing and footprint comply with JEDEC MO-153.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (–IN A) | Inverting input, Channel A | Differential input node for first amplifier; requires matched impedance for optimal CMRR and distortion. |
| 2 (+IN A) | Non-inverting input, Channel A | Reference input for Channel A; bias current cancellation resistor recommended when used with source impedances >1kΩ. |
| 3 (DIS B) | Disable control, Channel B | Active-low logic input; pulls LOW to place Channel B output in high-Z and reduce supply current to <300µA. |
| 4 (–IN B) | Inverting input, Channel B | Independent differential input for second amplifier; electrically isolated from other channels. |
| 5 (+IN B) | Non-inverting input, Channel B | DC-biased input node for Channel B; compatible with ac-coupled or dc-coupled configurations. |
| 6 (DIS C) | Disable control, Channel C | Enables per-channel power management; no internal pull-up - must be externally pulled HIGH or tied to VS for operation. |
| 7 (–IN C) | Inverting input, Channel C | Third amplifier input; supports independent gain configuration (e.g., sync processing in RGB systems). |
| 8 (+IN C) | Non-inverting input, Channel C | Configurable reference point for Channel C; usable as summing node or buffered reference. |
| 9 (DIS A) | Disable control, Channel A | First channel disable; timing-critical applications require <25ns enable time for synchronized wake-up. |
| 10 (+VS) | Positive supply | Common positive rail for all three amplifiers; requires local 0.1µF ceramic decoupling to ground. |
| 11 (OUT A) | Output, Channel A | High-current output capable of driving 75Ω loads directly; output capacitance in disable mode is 4pF. |
| 12 (–VS) | Negative supply | Common negative rail; connects to ground in single-supply +5V operation. |
| 13 (OUT B) | Output, Channel B | Independent output with identical drive strength and settling behavior as OUT A. |
| 14 (+VS) | Positive supply (redundant) | Second +VS connection for improved power distribution; must be connected to same net as Pin 10. |
| 15 (OUT C) | Output, Channel C | Third output; crosstalk to other channels is –64dBc at 5MHz - suitable for I/Q or multi-channel imaging paths. |
| 16 (–VS) | Negative supply (redundant) | Second –VS connection; required for thermal and EMI performance in SSOP-16 layout. |
Key Features
| Feature | Design Value |
|---|---|
| Triple independent disable control | Per-channel power-down reduces total system current by >98% when idle - critical for portable instruments and battery-powered imaging. |
| Unity-gain stable wideband operation | 220MHz bandwidth at G = +2 with no external compensation - eliminates stability risks in RGB driver and ADC buffer designs. |
| High-output-current voltage-feedback topology | 190mA drive into 100Ω with <0.1% THD - replaces current-feedback op amps where DC accuracy and offset stability are required. |
| Low-glitch enable/disable transitions | ±50mV turn-on / ±20mV turn-off glitch amplitude - prevents corruption of sampled data during channel activation in ADC front-ends. |
| Single-supply +5V operation with wide swing | 1V to 4V output range on +5V supply - supports direct interface to 1.8V/3.3V ADC references without level-shifting circuitry. |
Applications
| RGB Video Line Driving | High-Speed ADC Input Buffer |
|---|---|
Use Scenario: Driving three 75Ω coaxial cables carrying red, green, and blue analog video signals from graphics processor to display interface. IC Role / Device Role / Timing Role: Triple-channel line driver with independent disable for blanking intervals and sync signal conditioning. Use Value: 0.06% differential gain error and 220MHz bandwidth preserve color fidelity and edge sharpness in 1080p60 video streams. | Use Scenario: Conditioning analog sensor outputs before digitization in high-speed data acquisition systems (e.g., oscilloscopes, spectrum analyzers). IC Role / Device Role / Timing Role: Single-supply buffer between transimpedance amplifier and 12-bit+ ADC with >10MSPS sampling rate. Use Value: 1800V/µs slew rate prevents slewing-induced distortion on fast-rising input steps; 5.5nV/√Hz noise avoids degrading effective resolution. |
| Portable Instrumentation Signal Chain | Medical Imaging Channel Amplifier |
Use Scenario: Multi-channel analog front-end in handheld test equipment requiring low power, high bandwidth, and battery longevity. IC Role / Device Role / Timing Role: Power-gated triple amplifier for sensor excitation, signal gain, and reference buffering. Use Value: Per-channel disable cuts quiescent current from 16.5mA to <1mA - extends battery life by >5× during standby without sacrificing wake-up speed. | Use Scenario: Amplifying low-amplitude, high-frequency signals from ultrasound transducers or MRI gradient coils. IC Role / Device Role / Timing Role: Low-noise, high-slew-rate gain stage preceding anti-alias filtering and digitization. Use Value: –77dBc 2nd-harmonic distortion at 5MHz and 190mA drive ensure clean signal capture across 1–20MHz diagnostic bands. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar wideband op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2690DR | Dual-channel version; identical AC specs but lacks third channel and DIS C pin. | Not suitable for RGB or 3-channel synchronous systems; requires two devices for triple functionality. | Select OPA2690DR only when dual-channel operation suffices and board area allows two packages. |
| LMH6703MA | Single-channel, higher 1.8GHz GBW but lower output current (110mA); no disable function; higher 9.5nV/√Hz noise. | Requires three separate packages and external enable logic; unsuitable for low-power portable use. | Choose LMH6703MA only for ultra-wideband single-channel needs where noise and power are secondary to bandwidth. |
Compared with OPA2690DR and LMH6703MA, the OPA3690IDBQT uniquely integrates three independent wideband amplifiers with per-channel disable in one SSOP-16 package - reducing component count, PCB area, and power sequencing complexity in multi-channel video and instrumentation designs.
Availability
OPA3690IDBQT is available at Aetrix Electronics and suitable for RGB video line driving, high-speed ADC input buffering, and portable instrumentation requiring stable component supply across industrial temperature ranges (–40°C to +85°C).
Supply support for OPA3690IDBQT 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 OPA3690IDBQT belongs to TI's OPAx690 family of wideband voltage-feedback op amps, engineered specifically for demanding video, imaging, and high-speed data acquisition applications where unity-gain stability, low distortion, and multi-channel integration are essential.
FAQ
What is the maximum operating supply voltage for the OPA3690IDBQT?
The OPA3690IDBQT supports a maximum dual-supply voltage of ±6.0V and a maximum single-supply voltage of +12V. Operation beyond these limits risks permanent damage per absolute maximum ratings. For reliable long-term performance, TI specifies ±5V or +5V as the standard operating condition - where all key parameters (e.g., 220MHz bandwidth, 1800V/µs slew rate) are characterized and guaranteed.
Does the OPA3690IDBQT require external compensation for unity-gain stability?
No, the OPA3690IDBQT is internally compensated for unity-gain stability across its full operating range. It achieves 220MHz bandwidth at G = +2 without external components, and remains stable down to G = +1. This eliminates the need for feedback capacitors or gain-setting resistors for stability - simplifying layout and improving repeatability in RGB driver and ADC buffer circuits.
How does the disable function affect output state and timing in the OPA3690IDBQT?
When the DIS pin for any channel is pulled LOW, that channel's output enters a high-impedance state and supply current drops to <300µA. Enable time is 25ns and disable time is 200ns (measured at VIN = 1VDC). Turn-on/off glitches are limited to ±50mV and ±20mV respectively - ensuring minimal disturbance to adjacent signal paths during power-state transitions in the OPA3690IDBQT.
Can the OPA3690IDBQT drive 75Ω video loads directly without external components?
Yes, the OPA3690IDBQT can directly drive 75Ω video loads with full performance. At G = +2 and ±5V supplies, it delivers ±3.9V output swing into 100Ω and maintains 0.06% differential gain / 0.01° differential phase error into 150Ω - meeting NTSC/PAL broadcast standards. For 75Ω, a series 43Ω resistor at the output (forming a 75Ω match) is recommended to minimize reflections while preserving bandwidth and settling behavior in the OPA3690IDBQT.
What is the input voltage noise density of the OPA3690IDBQT and how does it compare to similar wideband op amps?
The OPA3690IDBQT has a measured input voltage noise density of 5.5nV/√Hz above 1MHz - exceptionally low for a 220MHz op amp with 1800V/µs slew rate. This compares favorably to alternatives like the LMH6703 (9.5nV/√Hz) and OPA691 (7.9nV/√Hz), making the OPA3690IDBQT preferable in noise-sensitive applications such as medical imaging front-ends and high-resolution ADC drivers where op amp noise dominates system SNR.
OPA3690IDBQT 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:
- 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
OPA3690IDBQT FAQ
1.How can I place an order for OPA3690IDBQT through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA3690IDBQT 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 OPA3690IDBQT reliable?
The price and inventory of OPA3690IDBQT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA3690IDBQT is usually 5 days.
3.What payment methods are accepted for OPA3690IDBQT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA3690IDBQT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA3690IDBQT?
OPA3690IDBQT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA3690IDBQT 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 OPA3690IDBQT?
For technical support, including OPA3690IDBQT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA3690IDBQT requirements.
6.How does Aetrix verify that OPA3690IDBQT is sourced from the original manufacturer or authorized distributors?
All OPA3690IDBQT 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 OPA3690IDBQT meets industry standards.
7.What is the process for return or replacement of OPA3690IDBQT?
All OPA3690IDBQT units undergo pre-shipment inspection (PSI). If there is an issue with OPA3690IDBQT, 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 OPA3690IDBQT part is unused and in its original packaging.
Return procedure for OPA3690IDBQT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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