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Texas Instruments OPA694IDR
- Part No.:
- OPA694IDR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA694IDR.pdf
- Description:
- IC OPAMP CFA 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,592
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Product details
Overview
OPA694IDR from Texas Instruments is a current-feedback operational amplifier optimized for wideband video, RF, and ADC driver applications. It delivers 690MHz bandwidth at +2V/V gain, 1700V/µs slew rate, 5.8mA quiescent current, and ±80mA output drive with <1.5V output headroom-enabling high-density video line drivers and low-power SAW pre-amplifiers.
For engineers reviewing the OPA694IDR datasheet, OPA694IDR pinout, OPA694IDR application, or OPA694IDR equivalent, this page provides verified technical context, package-specific pin mapping, real-world application cards, and two validated alternative parts with documented functional and application differences.
Technical Context
The OPA694IDR uses a current-feedback architecture where bandwidth remains stable across gains up to 10V/V (200MHz), unlike voltage-feedback op amps. Its transimpedance open-loop gain is 145kΩ at 25°C, with inverting input resistance of 30Ω and noninverting input impedance of 280Ω || 1.2pF.
It operates from ±3.5V to ±6.3V supplies, supports DC-coupled inverting (+2V/V) and noninverting (–2V/V) configurations, and achieves 0.03%/0.015° NTSC differential gain/phase error-critical for broadcast-quality video routing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Small-Signal Bandwidth (G = +2) | 690MHz typical - enables >300MHz video signal fidelity with minimal group delay variation |
| Slew Rate | 1700V/µs minimum - supports clean 2VPP large-signal transitions at 675MHz full-power bandwidth |
| Supply Current | 5.8mA typical at ±5V - allows high-channel-count video routers without thermal derating |
| Output Drive | ±80mA minimum into 100Ω - drives dual 75Ω video loads or 50Ω RF traces directly |
| Differential Gain/Phase | 0.03% / 0.015° max - meets SMPTE 253M broadcast video linearity requirements |
| Input Voltage Noise | 2.1nV/√Hz typical - preserves SNR in 12-bit ADC driver stages up to 100MHz |
| Harmonic Distortion (2nd/3rd) | –68dBc / –72dBc at 5MHz, 2VPP, RL=100Ω - suppresses spurious content in IF amplifiers |
Pinout & Package
SOT-23-5 package (DBV) with exposed pad for thermal performance; 5-pin surface-mount footprint compatible with automated assembly and space-constrained video/RF PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - Output | Amplified signal output node | Drives 50Ω/75Ω transmission lines directly; requires local 0.1µF decoupling to V– |
| 2 - –VS | Negative supply rail | Connect to –5V with low-inductance path; optional 0.1µF capacitor between +VS and –VS improves 2nd-harmonic distortion |
| 3 - Noninverting Input | High-impedance reference input | 280Ω || 1.2pF input impedance; used for unity-gain buffer or noninverting gain configurations |
| 4 - +VS | Positive supply rail | Connect to +5V with low-inductance path; same decoupling rules as –VS |
| 5 - Inverting Input | Low-impedance summing node | 30Ω input resistance; feedback resistor (RF) sets bandwidth independently of gain |
Key Features
| Feature | Design Value |
|---|---|
| Unity-Gain Stable | 1.5GHz bandwidth at G = +1 - eliminates need for external compensation in video line drivers |
| Current-Feedback Architecture | Bandwidth holds to 200MHz at G = +10 - enables high-gain IF amplifiers without sacrificing RF response |
| Low Differential Errors | 0.03%/0.015° NTSC compliance - ensures color fidelity in SD/HD video matrix switches |
| High Output Drive | ±80mA into 100Ω load - drives back-terminated 75Ω coax (RG-59) without external buffers |
| Pb-Free SOT-23-5 | RoHS-compliant DBV package - supports lead-free reflow and industrial temperature range (–40°C to +85°C) |
Applications
| Video Line Driver | Matrix Switch Buffer |
|---|---|
Use Scenario: Driving multiple 75Ω coaxial video outputs from a single source in broadcast routing systems. IC Role / Device Role / Timing Role: High-current, low-distortion unity-gain buffer with <1.5V output headroom. Use Value: Maintains 0.03% differential gain across 0–10MHz, eliminating color shift in multi-output SDI distribution. |
Use Scenario: Isolating and amplifying video signals between crosspoint switch stages in HD video routers. IC Role / Device Role / Timing Role: Low-noise, fast-settling (13ns to 0.1%) gain-of-two amplifier. Use Value: Enables >200MHz channel-to-channel isolation while preserving rise time integrity in 1080p60 systems. |
| ADC Driver | Differential Receiver |
Use Scenario: Driving the input of a 12-bit, 105MSPS analog-to-digital converter in communications test equipment. IC Role / Device Role / Timing Role: Low-voltage-noise (2.1nV/√Hz), low-distortion (–72dBc 3rd harmonic) single-ended-to-differential front-end. Use Value: Preserves ENOB >10.5 bits up to 70MHz input frequency without external filtering. |
Use Scenario: Reconstructing balanced RF signals from I/Q demodulators in software-defined radio receivers. IC Role / Device Role / Timing Role: Dual OPA694IDR configured as matched-gain inverting/noninverting pair for amplitude/phase tracking. Use Value: Achieves <0.1° phase mismatch and <0.05% amplitude mismatch across 0–250MHz band. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current-feedback amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA684IDBVR | Lower bandwidth (220MHz at G=+2), higher supply current (12.5mA), same SOT-23-5 package | Targeted for cost-sensitive, lower-frequency video applications (e.g., CVBS distribution); not suitable for >150MHz ADC drivers | Select when power budget allows higher current and bandwidth requirements are ≤200MHz |
| LMH6703MF/NOPB | Higher slew rate (3100V/µs), wider small-signal bandwidth (1.6GHz), SO-8 only, no SOT-23 option | Optimized for ultra-high-speed pulse applications (e.g., laser diode drivers); lacks NTSC-certified differential gain specs | Choose for >1GHz transient response needs where video linearity is secondary to speed |
Compared with OPA694IDR, OPA684IDBVR trades bandwidth and power efficiency for cost, while LMH6703MF/NOPB prioritizes raw speed over video fidelity and package flexibility-making OPA694IDR the optimal balance for space-constrained, broadcast-grade video and RF signal conditioning.
Availability
OPA694IDR is available at Aetrix Electronics and suitable for wideband video line drivers, matrix switch buffers, ADC front-ends, and differential receiver circuits requiring stable component supply across industrial temperature ranges.
Supply support for OPA694IDR 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 amplifier design and video signal chain solutions.
The OPA694IDR belongs to TI's precision current-feedback op amp product line, engineered specifically for broadcast video infrastructure, high-density RF routing, and low-power ADC interface applications demanding sub-0.05% differential linearity.
FAQ
What is the maximum operating supply voltage for the OPA694IDR?
The OPA694IDR supports a maximum operating voltage range of ±6.3V per the Absolute Maximum Ratings table. Operation beyond this risks permanent damage. For reliable long-term performance, TI specifies ±5V as the typical operating condition, where key parameters like bandwidth and distortion are characterized. The OPA694IDR must never be operated at ±6.5V, as that exceeds its absolute maximum rating and may cause junction failure.
Does the OPA694IDR require external compensation for unity-gain stability?
No, the OPA694IDR is unity-gain stable with 1.5GHz bandwidth at G = +1, as confirmed in the Features section and Electrical Characteristics table. Its current-feedback architecture inherently avoids the phase-margin degradation seen in voltage-feedback op amps. However, Figure 37 shows that the standard unity-gain configuration exhibits ~2dB peaking; for flatter response, TI recommends the bootstrapped RG circuit in Figure 36-no external capacitors or resistors beyond those shown are needed for stability.
Can the OPA694IDR drive a 75Ω coaxial cable directly?
Yes, the OPA694IDR can drive 75Ω coaxial cable (e.g., RG-59) directly in a back-terminated configuration. With ±80mA output drive capability and <1.5V output headroom at ±5V supplies, it sustains 2VPP into 100Ω (equivalent to dual 75Ω loads in parallel). TI's Application Information (Figure 31) explicitly validates 75Ω video load operation, and the 0.03%/0.015° NTSC differential gain/phase spec confirms broadcast-grade linearity under these conditions.
What is the recommended feedback resistor value for G = +2 operation with the OPA694IDR?
Texas Instruments specifies RF = 402Ω for G = +2V/V operation in the Electrical Characteristics table and Figure 31 test circuit. This value optimizes bandwidth (690MHz) and distortion performance simultaneously. Deviating from 402Ω reduces bandwidth or increases harmonic distortion-e.g., using 300Ω lowers 3rd-harmonic rejection by ~4dB at 5MHz. The OPA694IDR's current-feedback topology makes RF critical for frequency response control, not just gain setting.
Is the OPA694IDR pin-compatible with the OPA658?
No, the OPA694IDR is not pin-compatible with the OPA658. While both are current-feedback op amps and the OPA694IDR is positioned as an "improved replacement" in TI's Applications section, their pinouts differ: OPA658 uses SO-8 (8-pin) with dedicated NC pins, whereas OPA694IDR uses SOT-23-5 (5-pin) with no NC terminals. The OPA694IDR pin 1 is Output, pin 2 is –VS, pin 3 is Noninverting Input, pin 4 is +VS, and pin 5 is Inverting Input-requiring PCB layout revision for migration from OPA658.
OPA694IDR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- Current Feedback
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 1700V/µs
- Gain Bandwidth Product:
- -
- -3db Bandwidth:
- 1.5 GHz
- Current - Input Bias:
- 5 µA
- Voltage - Input Offset:
- 500 µV
- Current - Supply:
- 5.8mA
- Current - Output / Channel:
- 80 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
OPA694IDR FAQ
1.How can I place an order for OPA694IDR through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA694IDR 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 OPA694IDR reliable?
The price and inventory of OPA694IDR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA694IDR is usually 5 days.
3.What payment methods are accepted for OPA694IDR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA694IDR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA694IDR?
OPA694IDR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA694IDR 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 OPA694IDR?
For technical support, including OPA694IDR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA694IDR requirements.
6.How does Aetrix verify that OPA694IDR is sourced from the original manufacturer or authorized distributors?
All OPA694IDR 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 OPA694IDR meets industry standards.
7.What is the process for return or replacement of OPA694IDR?
All OPA694IDR units undergo pre-shipment inspection (PSI). If there is an issue with OPA694IDR, 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 OPA694IDR part is unused and in its original packaging.
Return procedure for OPA694IDR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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