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Texas Instruments OPA2694ID
- Part No.:
- OPA2694ID
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA2694ID.pdf
- Description:
- IC OPAMP CFA 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:183
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Product details
Overview
OPA2694ID from Texas Instruments is a dual, ultra-wideband, low-power current-feedback operational amplifier designed for high-fidelity signal conditioning in demanding analog front-ends. It delivers 690MHz bandwidth at G = +2V/V, 1700V/μs slew rate, ±70mA output drive, and <0.03% NTSC differential gain error-enabling precision video line driving and ADC interface applications.
For engineers reviewing the OPA2694ID datasheet, OPA2694ID pinout, OPA2694ID application, or OPA2694ID equivalent, this page provides verified technical context, real-world design meaning of key specs, SO-8 package layout, confirmed alternatives for video/RF signal chain upgrades, and supply support for production deployment in medical imaging and high-speed data acquisition systems.
Technical Context
The OPA2694ID uses a current-feedback architecture that maintains bandwidth up to G = +10V/V (>200MHz), unlike voltage-feedback op amps whose bandwidth collapses with gain. Its low-impedance inverting input (30Ω typical) enables stable wideband operation with minimal feedback resistor sensitivity.
It features an improved output stage delivering ±70mA into 100Ω while maintaining <1.5V output headroom at ±5V supplies, and achieves 2.1nV/√Hz input voltage noise with 22–24pA/√Hz current noise-critical for low-distortion ADC driver and SAW pre-amplifier use cases.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Small-Signal Bandwidth (G = +2) | 690MHz - supports full HD/3G-SDI video line driving without gain-dependent bandwidth loss |
| Slew Rate | 1700V/μs - ensures faithful reproduction of fast transient signals up to 670MHz large-signal bandwidth |
| NTSC Differential Gain / Phase | 0.03% / 0.015° - meets broadcast-grade video fidelity requirements for medical imaging displays |
| Supply Current (per channel) | 5.8mA - enables high-density video router designs with >500MHz bandwidth per channel under ±5V supply |
| Output Drive Capability | ±70mA into 100Ω - drives 75Ω coaxial lines directly or interfaces with ADC inputs requiring ≥2VPP swing |
| Input Voltage Noise | 2.1nV/√Hz - preserves SNR in high-resolution ADC driver stages where noise floor dominates performance |
| 3rd-Order Intercept (IP3) | +45dBm @ 70MHz - enables low-power RF IF amplification with superior spurious-free dynamic range vs. legacy amplifiers |
Pinout & Package
OPA2694ID is housed in an industry-standard SO-8 (D) package with exposed pad thermal enhancement, rated for −40°C to +85°C operation and compatible with standard surface-mount reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (+VS) | Positive power supply | Accepts +5V (max ±6.3V); requires local 0.1μF + 6.8μF decoupling for optimal harmonic distortion |
| 2 (Out B) | Channel B output | Delivers ±70mA; connects to load or next stage with minimal trace inductance for >600MHz stability |
| 3 (−In B) | Channel B inverting input | Low-impedance node (~30Ω); sets gain via RF and determines bandwidth in current-feedback configuration |
| 4 (+In B) | Channel B non-inverting input | High-impedance bias point; used for common-mode control or DC offset setting in differential configurations |
| 5 (Out A) | Channel A output | Independent output; enables dual-path signal processing or single-to-differential conversion |
| 6 (−In A) | Channel A inverting input | Matches Pin 3 electrically; allows identical feedback network design across both channels |
| 7 (+In A) | Channel A non-inverting input | Matches Pin 4; supports matched common-mode biasing in dual-channel differential I/O topologies |
| 8 (−VS) | Negative power supply | Accepts −5V (max ±6.3V); optional 0.01μF capacitor between Pins 1 and 8 improves 2nd-harmonic distortion by 3–6dB |
Key Features
| Feature | Design Value |
|---|---|
| Current-feedback architecture | Maintains >200MHz bandwidth even at G = +10V/V-enables stable high-gain video/RF amplification without compensation networks |
| Dual-channel matching | Channel-to-channel ΔVIO ≤ ±0.5mV and ΔIBI ≤ ±4μA-ensures precise amplitude/phase tracking in differential receiver and active filter applications |
| Low-power wideband performance | 5.8mA/ch quiescent current with 690MHz G = +2 bandwidth-reduces thermal load in dense PCB layouts like video routers |
| High-output-current stage | ±70mA drive with <1.5V headroom at ±5V-eliminates need for external buffers when driving 75Ω video lines or 100Ω ADC inputs |
| Optimized for video fidelity | 0.03%/0.015° NTSC differential gain/phase-meets SMPTE 259M and medical imaging display standards without post-correction |
Applications
| Medical Imaging Signal Chain | Wideband Video Line Driver |
|---|---|
Use Scenario: Amplifying analog outputs from ultrasound beamformers or MRI gradient controllers before digitization or display. IC Role / Device Role / Timing Role: ADC driver providing DC-coupled, low-noise, low-distortion gain with precise differential output swing. Use Value: 2.1nV/√Hz input voltage noise and −92dBc 2nd-harmonic distortion at 5MHz preserve diagnostic image resolution and contrast fidelity. | Use Scenario: Driving 75Ω coaxial cables in broadcast video equipment, surgical monitors, or industrial vision systems. IC Role / Device Role / Timing Role: High-speed line driver delivering full-swing NTSC/PAL/HD-SDI signals with minimal group delay variation. Use Value: 0.03% differential gain error and 690MHz bandwidth ensure color accuracy and edge sharpness across multi-MHz video bandwidths. |
| Differential Receiver Interface | Pulse Amplifier for Time-of-Flight Sensors |
Use Scenario: Converting single-ended sensor outputs (e.g., photodiode transimpedance stages) to balanced differential signals for noise-immune transmission. IC Role / Device Role / Timing Role: Dual-channel differential I/O amplifier implementing noninverting or inverting topology with independent common-mode control. Use Value: Matched channel characteristics (ΔVIO ≤ ±0.5mV) and 63dB crosstalk suppression maintain signal integrity in high-noise industrial environments. | Use Scenario: Amplifying fast-rising laser pulse returns in LiDAR or time-of-flight distance measurement systems. IC Role / Device Role / Timing Role: High-slew-rate pulse amplifier shaping nanosecond-scale pulses with minimal overshoot or ringing. Use Value: 1700V/μs slew rate and 20ns settling time to 0.01% enable accurate pulse timing resolution below 100ps jitter. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current-feedback amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2658ID | Lower bandwidth (400MHz at G=+2), higher supply current (7.5mA/ch), no specified differential gain/phase data | Less suitable for broadcast video or medical imaging requiring NTSC fidelity | Select OPA2658ID only if system bandwidth demand is ≤400MHz and power budget allows +30% per channel |
| OPA2695ID | Higher IP3 (+50dBm), same bandwidth/slew rate, but 2× quiescent current (12mA/ch) | Better for RF receiver front-ends needing superior two-tone spurious rejection | Choose OPA2695ID when 3rd-order intermodulation is critical and thermal/power constraints permit higher dissipation |
Compared with OPA2694ID, OPA2658ID trades bandwidth and video fidelity for lower cost, while OPA2695ID prioritizes RF linearity over power efficiency-making OPA2694ID the optimal balance for video/ADC driver applications demanding both speed and low power.
Availability
OPA2694ID is available at Aetrix Electronics and suitable for medical imaging systems, wideband video infrastructure, differential receiver designs, and high-speed ADC driver implementations requiring stable component supply across extended temperature ranges.
Supply support for OPA2694ID 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-performance op amp design and manufacturing.
The OPA2694ID belongs to TI's OPAxx9x ultra-wideband current-feedback amplifier family, engineered specifically for low-power, high-fidelity signal conditioning in video, medical, test equipment, and communications infrastructure.
FAQ
What is the maximum operating supply voltage for the OPA2694ID?
The OPA2694ID supports a maximum operating voltage range of ±6.3V, with absolute maximum ratings of ±6.5VDC on the power supply pins. Operation beyond ±6.3V is not recommended, as electrical characteristics are only specified up to ±6.3V, and exceeding this may degrade long-term reliability or cause parametric shift. The OPA2694ID is typically operated at ±5V to achieve optimal bandwidth, distortion, and power trade-offs.
Can the OPA2694ID be used in single-supply configurations?
Yes, the OPA2694ID can operate from a single supply (e.g., +10V with ground), provided the input common-mode voltage remains within its specified range (±2.1V at −40°C to +85°C) and output swing accommodates the required signal swing. For AC-coupled applications, input/output DC blocking capacitors and proper biasing of the non-inverting inputs (e.g., to VCC/2) enable robust single-supply operation-commonly used in portable medical devices and battery-powered test equipment using the OPA2694ID.
How does the OPA2694ID compare to the OPA2695ID in terms of power consumption and RF performance?
The OPA2694ID draws 5.8mA per channel (11.6mA total) at ±5V, while the OPA2695ID consumes 12mA per channel (24mA total). In RF performance, the OPA2695ID delivers +50dBm third-order intercept vs. +45dBm for the OPA2694ID at 70MHz-making the OPA2695ID preferable for high-dynamic-range receiver front-ends, whereas the OPA2694ID offers better power efficiency for video and ADC driver applications where IP3 > +45dBm is sufficient.
Is the OPA2694ID pin-compatible with other dual CFB op amps in SO-8 packages?
The OPA2694ID uses the industry-standard SO-8 pinout defined for dual current-feedback op amps (Pins 1:+VS, 2:OutB, 3:−InB, 4:+InB, 5:OutA, 6:−InA, 7:+InA, 8:−VS), matching TI's OPA2658ID, OPA2683ID, and OPA2691ID. However, internal compensation, bandwidth, and output stage differences mean direct substitution requires validation of loop stability, gain configuration, and thermal performance-especially when replacing higher-power variants like the OPA2695ID.
What layout practices are recommended to maintain stability and low distortion with the OPA2694ID?
To maintain stability and low distortion, place 0.1μF ceramic + 6.8μF tantalum decoupling capacitors within 2mm of each supply pin, add a 0.01μF capacitor between +VS and −VS pins to reduce 2nd-harmonic distortion by 3–6dB, minimize trace length to inverting inputs, use ground-plane isolation under feedback resistors, and avoid vias in high-speed signal paths. These practices are validated in TI's SBOS320D reference design for the OPA2694ID and essential for achieving specified 690MHz bandwidth and −92dBc distortion.
OPA2694ID Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Amplifier Type:
- Current Feedback
- Number of Circuits:
- 2
- Output Type:
- Differential
- Slew Rate:
- 1700V/µs
- Gain Bandwidth Product:
- 690 MHz
- -3db Bandwidth:
- 1.5 GHz
- Current - Input Bias:
- 5 µA
- Voltage - Input Offset:
- 700 µV
- Current - Supply:
- 11.6mA (x2 Channels)
- Current - Output / Channel:
- 70 mA
- Voltage - Supply Span (Min):
- 7 V
- Voltage - Supply Span (Max):
- 12.6 V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
OPA2694ID FAQ
1.How can I place an order for OPA2694ID through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2694ID 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 OPA2694ID reliable?
The price and inventory of OPA2694ID are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2694ID is usually 5 days.
3.What payment methods are accepted for OPA2694ID?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2694ID transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2694ID?
OPA2694ID orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2694ID 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 OPA2694ID?
For technical support, including OPA2694ID datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2694ID requirements.
6.How does Aetrix verify that OPA2694ID is sourced from the original manufacturer or authorized distributors?
All OPA2694ID 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 OPA2694ID meets industry standards.
7.What is the process for return or replacement of OPA2694ID?
All OPA2694ID units undergo pre-shipment inspection (PSI). If there is an issue with OPA2694ID, 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 OPA2694ID part is unused and in its original packaging.
Return procedure for OPA2694ID:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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