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Texas Instruments OPA694IDG4
- Part No.:
- OPA694IDG4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA694IDG4.pdf
- Description:
- IC OPAMP CFA 1 CIRCUIT 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,378
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Product details
Overview
OPA694IDG4 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, ±80mA output drive, and 5.8mA quiescent current on ±5V supplies - enabling high-fidelity signal conditioning in matrix switch buffers and differential receivers.
For engineers reviewing the OPA694IDG4 datasheet, OPA694IDG4 pinout, OPA694IDG4 application, or OPA694IDG4 equivalent, this page provides verified specifications, SOT23-5 package layout, real-world video/RF use cases, and two validated alternative parts with documented functional trade-offs.
Technical Context
The OPA694IDG4 employs a current-feedback architecture with ~30Ω internal inverting-input impedance (RI), enabling near-constant bandwidth across gains up to +10V/V. Its transimpedance open-loop gain rolls off at –20dB/decade above ~100kHz, with unity-gain stability confirmed to 1.5GHz.
It features an improved output stage delivering <1.5V headroom at ±80mA load, low differential gain/phase error (0.03%/0.015°), and input voltage noise of 2.1nV/√Hz - all specified under ±5V operation with 402Ω feedback and 100Ω load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Small-Signal Bandwidth (G = +2) | 690MHz typical - supports full HD video line driving and IF amplification up to 70MHz |
| Slew Rate | 1700V/µs minimum - enables clean 2VPP pulse response with ≤20ns settling to 0.01% |
| Supply Current | 5.8mA maximum at ±5V - allows dense placement in video routers without thermal derating |
| Differential Gain/Phase Error | 0.03%/0.015° max - meets NTSC/PAL broadcast-grade video fidelity requirements |
| Output Drive Capability | ±80mA into 100Ω - drives dual 75Ω video loads or 50Ω RF terminations directly |
| Input Voltage Noise Density | 2.1nV/√Hz at >1MHz - preserves SNR in 12-bit ADC front-ends |
| Unity-Gain Bandwidth | 1500MHz typical - ensures stable operation as a broadband buffer or active filter element |
Pinout & Package
SOT23-5 package (DBV) with exposed pad; 5-pin surface-mount outline measuring 2.9mm × 1.6mm × 1.15mm; thermal resistance θJA = 150°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Output) | Amplifier output node | Delivers ±80mA into 100Ω; requires local 0.1µF decoupling to each supply rail |
| 2 (–VS) | Negative power supply connection | Accepts –5V nominal; must be decoupled to ground and +VS with 0.1µF capacitor |
| 3 (Noninverting Input) | High-impedance input reference | CMIR = ±2.5V at 25°C; bias current ±5µA max; used for gain-setting in noninverting configurations |
| 4 (+VS) | Positive power supply connection | Accepts +5V nominal; same decoupling requirements as –VS |
| 5 (Inverting Input) | Low-impedance current-summing node | RI ≈ 30Ω; sets bandwidth via RF; sensitive to parasitic capacitance - minimize trace length |
Key Features
| Feature | Design Value |
|---|---|
| Current-feedback topology | Maintains 690MHz bandwidth at G = +2 and 200MHz at G = +10 - eliminates gain-bandwidth trade-off |
| Low-distortion output stage | Harmonic distortion ≤ –68dBc (2nd) / ≤ –72dBc (3rd) at 5MHz, 2VPP, 100Ω load - suitable for RF summing |
| Optimized for 50Ω/75Ω systems | Supports matched-source/sink configurations using standard RF resistor values (e.g., RF = 402Ω, RG = 402Ω) |
| Green Pb-free SOT23-5 package | RoHS-compliant DBV marking "BIA"; qualified for –40°C to +85°C industrial temperature range |
| ESD-protected design | HBM rating 1500V - reduces handling sensitivity during PCB assembly |
Applications
| Video Line Driver | Matrix Switch Buffer |
|---|---|
Use Scenario: Driving long RG-59 coaxial cables in broadcast studio routing systems with minimal signal degradation. IC Role / Device Role / Timing Role: High-slew-rate current-feedback amplifier configured as unity-gain buffer with 75Ω source/load termination. Use Value: 0.03% differential gain error preserves color fidelity; 1.5GHz bandwidth prevents high-frequency roll-off in SDI/HDMI signal paths. | Use Scenario: Signal buffering between crosspoint switch ICs in high-density video distribution frames. IC Role / Device Role / Timing Role: Noninverting gain-of-2 amplifier isolating switch outputs while maintaining DC coupling and impedance matching. Use Value: 5.8mA supply current enables 32-channel integration without airflow or heatsinking; ±80mA drive handles fan-out to multiple downstream loads. |
| Differential Receiver | ADC Driver |
Use Scenario: Converting single-ended IF signals to balanced differential pairs for high-dynamic-range demodulators. IC Role / Device Role / Timing Role: Inverting summing amplifier generating true differential output using dual OPA694IDG4 devices. Use Value: 250MHz differential bandwidth at G = 5V/V supports >100MSPS sampling; low 2.1nV/√Hz noise maintains ENOB in 12-bit converters. | Use Scenario: Front-end signal conditioning for wideband digitization of radar pulses or spectrum analyzer IF outputs. IC Role / Device Role / Timing Role: AC-coupled, gain-of-2 driver feeding 12-bit ADC inputs with controlled common-mode voltage (VCM). Use Value: 675MHz full-power bandwidth captures 2VPP transients without slewing artifacts; 0.1% settling in 13ns meets timing budgets for high-speed acquisition. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar current-feedback amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA695ID | Higher 3rd-order intercept (+22dBm vs +15dBm), 1.8GHz GBW, but 7.5mA IQ | Better spurious suppression in RF receiver front-ends; less suitable for power-constrained video routers | Select OPA695ID when intermodulation performance outweighs quiescent power budget |
| OPA683ID | Lower 5.3mA IQ, 500MHz G=+2 bandwidth, 1200V/µs slew rate | Reduced bandwidth limits use in >1080p60 video; adequate for baseband audio or lower-frequency instrumentation | Choose OPA683ID where thermal density or cost is critical and 500MHz bandwidth suffices |
Compared with OPA694IDG4, OPA695ID trades 1.7mA higher supply current for 70MHz more bandwidth and superior RF linearity, while OPA683ID reduces power by 0.5mA at the cost of 190MHz bandwidth - making OPA694IDG4 the optimal balance for wideband video and medium-frequency RF drivers.
Availability
OPA694IDG4 is available at Aetrix Electronics and suitable for video line driving, matrix switch buffering, and ADC driver applications requiring stable component supply, industrial temperature tolerance, and RoHS-compliant packaging.
Supply support for OPA694IDG4 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 precision amplifiers and signal chain solutions.
The OPA694IDG4 belongs to TI's high-speed current-feedback op amp product line, engineered specifically for wideband video distribution, RF infrastructure, and high-fidelity data acquisition systems demanding low power and exceptional AC performance.
FAQ
What is the maximum operating supply voltage for the OPA694IDG4?
The OPA694IDG4 supports a maximum operating voltage range of ±6.3V, with absolute maximum ratings of ±6.5V on each supply rail. Operation beyond ±6.3V risks exceeding internal power dissipation limits and may trigger thermal shutdown. The device is characterized and guaranteed over ±3.5V to ±6.3V, with optimal performance at ±5V as specified in the SBOS319G datasheet.
Does the OPA694IDG4 require external compensation for unity-gain stability?
No, the OPA694IDG4 is unity-gain stable with 1.5GHz bandwidth, as confirmed in the datasheet's Features section and Electrical Characteristics table. It does not require external compensation components in standard noninverting or inverting configurations. However, peaking >2dB occurs in unity-gain buffer mode (Figure 31); Figure 36 shows a bootstrapped RG configuration to improve flatness if needed.
Can the OPA694IDG4 drive a 50Ω load directly in an RF application?
Yes, the OPA694IDG4 can drive a 50Ω load directly: its ±80mA output current capability exceeds the 100mA peak required for a 2VPP sine wave into 50Ω (IPK = VPP/2R = 2V/100Ω = 20mA). Application circuits in Figures 32 and 35 confirm 50Ω source/load matching using standard RF resistors (RG = RF = 402Ω), with harmonic distortion measured at –68dBc (2nd) under those conditions.
What is the input common-mode voltage range for the OPA694IDG4 at 25°C?
At +25°C, the OPA694IDG4 has a specified input common-mode voltage range (CMIR) of ±2.5V relative to ground, meaning inputs may swing from –2.5V to +2.5V when powered from ±5V supplies. This range decreases to ±2.1V at +85°C per the Electrical Characteristics table, and operation outside these limits degrades CMRR and may cause clipping or increased offset drift.
How does the OPA694IDG4 compare to the OPA658 in video applications?
The OPA694IDG4 is explicitly positioned as an improved replacement for the OPA658 in the datasheet's Applications section. It offers 690MHz bandwidth at G=+2 (vs 500MHz for OPA658), lower 0.03% differential gain error (vs 0.05%), and reduced 5.8mA supply current (vs 7.5mA), while maintaining pin compatibility in SO-8 and SOT23-5 packages - making it a drop-in upgrade for existing video line driver designs.
OPA694IDG4 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:
- 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
OPA694IDG4 FAQ
1.How can I place an order for OPA694IDG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA694IDG4 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 OPA694IDG4 reliable?
The price and inventory of OPA694IDG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA694IDG4 is usually 5 days.
3.What payment methods are accepted for OPA694IDG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA694IDG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA694IDG4?
OPA694IDG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA694IDG4 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 OPA694IDG4?
For technical support, including OPA694IDG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA694IDG4 requirements.
6.How does Aetrix verify that OPA694IDG4 is sourced from the original manufacturer or authorized distributors?
All OPA694IDG4 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 OPA694IDG4 meets industry standards.
7.What is the process for return or replacement of OPA694IDG4?
All OPA694IDG4 units undergo pre-shipment inspection (PSI). If there is an issue with OPA694IDG4, 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 OPA694IDG4 part is unused and in its original packaging.
Return procedure for OPA694IDG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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