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Texas Instruments OPA2694IDG4
- Part No.:
- OPA2694IDG4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA2694IDG4.pdf
- Description:
- IC OPAMP CFA 2 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,939
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Product details
Overview
OPA2694IDG4 from Texas Instruments is a dual, ultra-wideband current-feedback operational amplifier optimized for high-speed video, ADC driving, and RF signal conditioning. It delivers 690MHz bandwidth at G = +2V/V, 1700V/μs slew rate, ±70mA output drive, and 0.03%/0.015° NTSC differential gain/phase - enabling precision wideband line drivers and differential receivers in medical imaging and video routing systems.
For engineers reviewing the OPA2694IDG4 datasheet, OPA2694IDG4 pinout, OPA2694IDG4 application, or OPA2694IDG4 equivalent, this page provides verified electrical specifications, SO-8 package layout, real-world design context for ADC driver and SAW pre-amplifier use cases, and validated alternative parts with documented functional trade-offs.
Technical Context
The OPA2694IDG4 employs a current-feedback architecture that maintains bandwidth across gains - delivering >200MHz at G = +10V/V and >670MHz full-power bandwidth at G = +2V/V. Its low 5.8mA/ch quiescent current enables high-density video router designs without thermal compromise.
It features an improved output stage with <1.5V output voltage headroom and ±70mA drive into 100Ω loads, while achieving 2.1nV/√Hz input voltage noise and −92dBc 2nd-harmonic distortion (RL ≥ 500Ω, f = 5MHz). The device supports both inverting and noninverting configurations with independent bandwidth control via feedback resistor selection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Small-Signal Bandwidth (G = +1) | 1500MHz - enables unity-gain stable operation in high-frequency buffer and cable driver applications |
| Small-Signal Bandwidth (G = +2) | 690MHz - supports 1080p60 video line driving with minimal group delay variation |
| Slew Rate | 1700V/μs - ensures faithful reproduction of fast transient signals up to ~670MHz full-power bandwidth |
| NTSC Differential Gain / Phase | 0.03% / 0.015° - meets broadcast-grade video fidelity requirements for professional imaging equipment |
| Supply Current (per channel) | 5.8mA - allows dual-channel operation at ±5V with only 11.6mA total, critical for power-constrained video routers |
| Output Drive Capability | ±70mA into 100Ω - sustains 2VPP differential swing into standard video termination loads |
| Input Voltage Noise | 2.1nV/√Hz - preserves SNR in high-resolution ADC driver stages (e.g., ADS5220-based systems) |
Pinout & Package
OPA2694IDG4 is housed in an industry-standard SO-8 (D) package with exposed pad for thermal enhancement, rated for −40°C to +85°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (+VS) | Positive supply rail | Accepts +5V (±3.5V to ±6.3V operating range); requires local 0.1μF decoupling |
| 2 (Out B) | Channel B output | Low-impedance current-feedback output; drives 100Ω loads with <1.5V headroom |
| 3 (−In B) | Inverting input B | Low-impedance node (~30Ω); sets gain and bandwidth via external RF resistor |
| 4 (+In B) | Non-inverting input B | High-impedance node (280kΩ || 1.2pF); used for common-mode biasing in differential I/O |
| 5 (Out A) | Channel A output | Independent output; supports simultaneous dual-channel operation without crosstalk degradation (63dB @ 5MHz) |
| 6 (−In A) | Inverting input A | Matches Pin 3 electrically; enables matched dual-path design for differential signaling |
| 7 (+In A) | Non-inverting input A | Matches Pin 4; paired with Pin 4 for balanced common-mode control in DC-coupled differential interfaces |
| 8 (−VS) | Negative supply rail | Accepts −5V; 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 - unlike voltage-feedback op amps where bandwidth collapses with gain |
| Dual-channel matching | ΔVOS ≤ ±0.5mV and ΔIB ≤ ±5μA - enables precise differential I/O and single-to-differential conversion without calibration |
| Low-distortion video performance | 0.03% differential gain error and −92dBc 2nd-harmonic (RL ≥ 500Ω) - satisfies SMPTE/EBU broadcast video standards |
| SAW filter pre-amplification | +50dBm 3rd-order intercept through 70MHz at 5.8mA/ch - replaces higher-power RF amplifiers in IF strips |
| DC-coupled differential interface support | Common-mode gain ≈ 1 from non-inverting inputs to outputs - simplifies single-supply biasing in ADC front-ends |
Applications
| Medical Imaging Signal Chain | Wideband Video Line Driver |
|---|---|
Use Scenario: Amplifying analog outputs from ultrasound beamformers before digitization in portable diagnostic systems. IC Role / Device Role / Timing Role: ADC driver providing 2VPP differential output into ADS5220 with >150MHz bandwidth and <−90dBc harmonic distortion. Use Value: Enables 12-bit, 40MSPS digitization of high-frequency echo signals without SNR degradation from amplifier noise or distortion. |
Use Scenario: Driving 75Ω coaxial cables in broadcast video routers handling 1080p60 HDMI or SDI signals. IC Role / Device Role / Timing Role: Unity-gain buffer with 1500MHz bandwidth and 0.03%/0.015° differential gain/phase linearity. Use Value: Preserves color fidelity and edge sharpness over long cable runs without requiring post-compensation equalization. |
| Differential Receiver for High-Speed ADCs | RF SAW Filter Buffer in IF Strips |
Use Scenario: Converting single-ended sensor outputs to differential signals for TI ADS522x-family ADCs in test equipment. IC Role / Device Role / Timing Role: Single-to-differential converter using matched OPA2694IDG4 channels with DC-coupled gain of 12. Use Value: Achieves >70dB CMRR at baseband while maintaining phase matching within 0.15° across 100MHz bandwidth. |
Use Scenario: Recovering insertion loss after mixer+SAW stages in 70MHz IF receivers for spectrum analyzers. IC Role / Device Role / Timing Role: Inverting gain-of-8 SAW buffer with 50Ω input match and 250MHz flat bandwidth. Use Value: Delivers 0dB net gain across SAW passband while suppressing 3rd-order intermodulation spurs by >50dBm IP3. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current-feedback amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2691ID | Higher output current (±150mA), but 2× higher supply current (12mA/ch) and no guaranteed 0.03% differential gain spec | Better suited for driving heavy capacitive loads or transformer-coupled line drivers; less optimal for low-power video routers | Select OPA2691ID when output drive >±100mA is required and power budget allows +6.2mA/ch overhead |
| OPA2683ID | Lower power (3.5mA/ch), narrower bandwidth (280MHz at G=+2), and higher differential gain error (0.08%) | Targeted at cost-sensitive, lower-bandwidth video applications (e.g., SD/HD-SDI up to 1.5Gbps) | Choose OPA2683ID for legacy HD video systems where 690MHz bandwidth and broadcast-grade linearity are not required |
Compared with OPA2691ID and OPA2683ID, the OPA2694IDG4 uniquely balances ultra-wide bandwidth, broadcast-grade video linearity, and low 5.8mA/ch power - making it the only option among the three qualified for medical ultrasound front-ends and 1080p60 RGB video routing without derating.
Availability
OPA2694IDG4 is available at Aetrix Electronics and suitable for medical imaging systems, broadcast video infrastructure, and high-speed data acquisition requiring stable component supply and guaranteed −40°C to +85°C operation.
Supply support for OPA2694IDG4 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 amp design and video signal conditioning.
The OPA2694IDG4 belongs to TI's ultra-wideband current-feedback op amp product line, engineered specifically for demanding applications including medical imaging, professional video, and RF IF signal chains where bandwidth, linearity, and power efficiency must coexist.
FAQ
What is the maximum recommended supply voltage for OPA2694IDG4?
The absolute maximum supply voltage for OPA2694IDG4 is ±6.5VDC, but the specified operating range is ±3.5V to ±6.3V. For optimal performance and reliability, TI recommends using ±5V supplies - this matches the conditions under which all key specs (690MHz bandwidth, 1700V/μs slew rate, 0.03% differential gain) are characterized and guaranteed in the OPA2694IDG4 datasheet.
Does OPA2694IDG4 support single-supply operation?
OPA2694IDG4 is specified for dual-supply operation (±5V typical), but can be used in single-supply configurations with proper common-mode biasing. The input common-mode range extends to ±2.5V at +25°C, and the output swings to within 1.5V of either rail. To implement single-supply operation, apply a mid-rail bias (e.g., VCM = VCC/2) to both non-inverting inputs and AC-couple inputs/outputs - as demonstrated in TI's OPA2694IDG4 active filter reference design.
How does OPA2694IDG4 differ from OPA2658 in terms of video performance?
OPA2694IDG4 is explicitly positioned as an improved replacement for OPA2658, offering tighter NTSC differential gain/phase (0.03%/0.015° vs. 0.05%/0.03°), higher slew rate (1700V/μs vs. 1400V/μs), and lower supply current (5.8mA/ch vs. 7.5mA/ch). These improvements enable OPA2694IDG4 to meet stricter broadcast video standards while reducing thermal load in dense PCB layouts - a key advantage confirmed in TI's SBOS320D datasheet revision notes.
Can OPA2694IDG4 drive a 50Ω load directly?
Yes - OPA2694IDG4 delivers ±70mA output current and is characterized into 100Ω loads, but can drive 50Ω loads with appropriate gain-setting resistor selection. When configured for G = +2V/V with RF = 402Ω, it sustains 2VPP output into 50Ω with <−85dBc 2nd-harmonic distortion. For optimal stability and bandwidth, TI recommends adding a small series resistor (e.g., 10–20Ω) between the output pin and the 50Ω load to dampen potential peaking, as shown in Figure 1 of the OPA2694IDG4 datasheet.
Is OPA2694IDG4 pin-compatible with other dual CFB op amps in SO-8 packages?
OPA2694IDG4 uses the industry-standard SO-8 pinout for dual current-feedback op amps (Pins 1:+VS, 2:OutB, 3:−InB, 4:+InB, 5:OutA, 6:−InA, 7:+InA, 8:−VS), matching OPA2683, OPA2684, OPA2691, and OPA2695. This allows direct substitution in existing layouts - however, bandwidth, noise, and distortion performance differ significantly across the family, so system-level validation is required when swapping devices like OPA2694IDG4 for OPA2691ID or OPA2683ID.
OPA2694IDG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- 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
OPA2694IDG4 FAQ
1.How can I place an order for OPA2694IDG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2694IDG4 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 OPA2694IDG4 reliable?
The price and inventory of OPA2694IDG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2694IDG4 is usually 5 days.
3.What payment methods are accepted for OPA2694IDG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2694IDG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2694IDG4?
OPA2694IDG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2694IDG4 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 OPA2694IDG4?
For technical support, including OPA2694IDG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2694IDG4 requirements.
6.How does Aetrix verify that OPA2694IDG4 is sourced from the original manufacturer or authorized distributors?
All OPA2694IDG4 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 OPA2694IDG4 meets industry standards.
7.What is the process for return or replacement of OPA2694IDG4?
All OPA2694IDG4 units undergo pre-shipment inspection (PSI). If there is an issue with OPA2694IDG4, 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 OPA2694IDG4 part is unused and in its original packaging.
Return procedure for OPA2694IDG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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