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Texas Instruments OPA699IDG4
- Part No.:
- OPA699IDG4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA699IDG4.pdf
- Description:
- IC VOLTAGE FEEDBACK 1 CIRC 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,066
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Product details
Overview
OPA699IDG4 from Texas Instruments is a wideband voltage-feedback operational amplifier with integrated bipolar output voltage limiting, stable for gains ≥ +4V/V, –3dB bandwidth of 260MHz at G = +6, slew rate of 1400V/µs, and ±10mV limiting voltage accuracy. It serves as a fast-recovery ADC input driver in high-speed data acquisition systems.
For engineers reviewing the OPA699IDG4 datasheet, OPA699IDG4 pinout, OPA699IDG4 application, or OPA699IDG4 equivalent, this page delivers verified specifications, SO-8 package details, limiting architecture behavior, recovery timing, and real-world use cases in IF limiting, transimpedance, and comparator circuits.
Technical Context
The OPA699IDG4 implements an output-stage voltage limiting architecture where two buffered limiter pins (VH and VL) directly clamp the output with ±10mV offset error, independent of closed-loop gain. Its linear operation extends to within 20mV of the limits, enabling precise guardbanding.
It features fast 1ns recovery from overdrive, 600MHz small-signal bandwidth in limit mode, and maintains stability without external compensation for G ≥ +4. The limiter feedthrough is –60dB at 5MHz, ensuring minimal signal coupling into limiting control paths.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| –3dB Bandwidth (G = +6) | 260MHz - supports high-frequency analog signal conditioning up to UHF band |
| Gain Bandwidth Product | 1000MHz - enables stable +20V/V gain with >50MHz closed-loop bandwidth |
| Slew Rate | 1400V/µs - ensures faithful reproduction of fast 4V-step transients in <8ns |
| Limiter Accuracy | ±10mV - guarantees tight output clamping for ADC input protection |
| Recovery Time | 1ns - restores linear operation rapidly after overdrive, minimizing signal distortion |
| Supply Voltage Range | ±5V (±6.5V max) - compatible with standard dual-rail lab and instrumentation supplies |
| Output Current Drive | ±120mA - drives 500Ω loads while maintaining linearity and limiting integrity |
Pinout & Package
OPA699IDG4 is housed in an SO-8 (D) package with industry-standard pinout and surface-mount footprint (5.0mm × 4.0mm, 1.27mm pitch). Thermal resistance θJA = 125°C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (NC) | No Connection | Unbonded die pad; must be left floating or grounded per layout best practice |
| 2 (Inverting Input) | Inverting Input Node | High-impedance differential input; requires matched source impedance for offset minimization |
| 3 (Noninverting Input) | Noninverting Input Node | DC-biased reference point in single-supply configurations; used for common-mode setting |
| 4 (–VS) | Negative Supply Rail | Connects to –5V rail; bypass with 0.1µF ceramic + 2.2µF electrolytic capacitors |
| 5 (VH) | Upper Limiter Control | Accepts externally set positive clamp voltage; bias current ±50µA max at ±5V supply |
| 6 (+VS) | Positive Supply Rail | Connects to +5V rail; same bypassing as –VS required for stability |
| 7 (Output) | Amplified Output | Delivers limited or linear output; capable of ±120mA sourcing/sinking into 500Ω |
| 8 (VL) | Lower Limiter Control | Accepts externally set negative clamp voltage; polarity opposite VH under dual-supply operation |
Key Features
| Feature | Design Value |
|---|---|
| Bipolar output limiting architecture | Enables precise, gain-independent clamping via dedicated VH/VL pins with ±10mV offset |
| 1ns overdrive recovery | Minimizes dead time in burst-mode or pulsed signal chains; preserves signal fidelity |
| Stable for G ≥ +4V/V | Eliminates need for external compensation networks in most gain configurations |
| ±5V and +5V supply operation | Supports both dual-rail instrumentation and single-supply portable systems with VCM = 2.5V |
| 600MHz limiter small-signal bandwidth | Ensures high-frequency signals remain bounded without phase shift or attenuation in limit mode |
Applications
| Fast Limiting ADC Input Driver | IF Limiting Amplifier |
|---|---|
Use Scenario: Protecting high-speed ADC inputs (e.g., 100MSPS+ pipeline or flash converters) from transient overvoltage during RF burst reception or sensor fault conditions. IC Role / Device Role / Timing Role: Front-end limiting amplifier with sub-ns recovery, placed directly before ADC sample-and-hold stage to prevent saturation and latch-up. Use Value: Enables robust digitization of intermittent high-amplitude signals without ADC front-end damage or extended recovery latency. | Use Scenario: Stabilizing intermediate frequency (IF) signal amplitude in communications receivers (e.g., 70MHz or 140MHz IF stages) prior to demodulation. IC Role / Device Role / Timing Role: Wideband IF limiting amplifier with flat 260MHz response and low harmonic distortion at 5MHz. Use Value: Maintains constant IF envelope across varying input levels, improving demodulator SNR and reducing AGC complexity. |
| Transimpedance with Fast Overdrive Recovery | Low Prop Delay Comparator |
Use Scenario: High-bandwidth photodiode transimpedance amplifier in optical time-of-flight or LIDAR systems where pulse return signals may exceed linear range. IC Role / Device Role / Timing Role: TIA output stage with integrated limiting; recovers in 1ns to process subsequent pulses without baseline shift. Use Value: Eliminates need for separate clamping diodes and recovery circuitry, reducing board area and propagation delay uncertainty. | Use Scenario: Zero-crossing or threshold detection in high-speed test equipment requiring <1ns decision latency and immunity to input overdrive. IC Role / Device Role / Timing Role: High-slew comparator substitute using saturated limiting behavior and fast recovery to generate clean digital edges. Use Value: Delivers deterministic 1ns transition-to-output timing without external hysteresis or blanking circuitry. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage-limiting amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA698IDG4 | Unity-gain stable; lower gain bandwidth (700MHz); ±15mV limiter accuracy; optimized for G ≤ +2 | Better SFDR at low gains; less suitable for G = +6 IF amplification | Select when unity-gain operation or improved spurious-free dynamic range at G = +1 is required |
| LMH6723MA/NOPB | No integrated limiting; higher 3.6GHz GBW; 3000V/µs slew; requires external clamping diodes | Higher raw speed but adds layout complexity and recovery latency from diode-based limiting | Select when maximum bandwidth and slew rate are critical and external limiting is acceptable |
Compared with OPA699IDG4, OPA698IDG4 trades limiting precision and high-gain bandwidth for unity-gain stability and lower distortion at low gains, while LMH6723MA/NOPB offers superior raw speed but lacks monolithic limiting-requiring discrete components that degrade recovery time and board-level repeatability.
Availability
OPA699IDG4 is available at Aetrix Electronics and suitable for high-speed data acquisition, IF signal processing, optical pulse detection, and precision comparator replacement applications requiring stable component supply and guaranteed long-term availability.
Supply support for OPA699IDG4 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 amps and signal chain solutions.
The OPA699IDG4 belongs to TI's OPAx69x family of wideband limiting amplifiers, designed specifically for high-fidelity, high-speed analog signal conditioning where overdrive resilience and rapid recovery are system-critical.
FAQ
What is the maximum supply voltage for the OPA699IDG4?
The OPA699IDG4 supports a maximum supply voltage of ±6.5V across the +VS and –VS pins. Operation at ±5V is specified and recommended for optimal performance, including full bandwidth and limiting accuracy. Exceeding ±6.5V risks permanent damage per absolute maximum ratings.
Does the OPA699IDG4 require external compensation for G = +6?
No, the OPA699IDG4 is internally compensated and stable for closed-loop gains ≥ +4V/V. At G = +6, no external compensation components are needed-verified by phase margin >45° and gain peaking <7.5dB in the datasheet. This simplifies layout and improves reproducibility.
How does the limiter accuracy of ±10mV impact ADC interface design?
The ±10mV limiter offset in the OPA699IDG4 allows designers to set VH and VL precisely 100mV inside the ADC's absolute input voltage range, ensuring full utilization of ADC code space while guaranteeing hard clipping before rail violation. This eliminates guesswork in clamp voltage selection and improves system-level dynamic range predictability.
Can the OPA699IDG4 operate from a single +5V supply?
Yes, the OPA699IDG4 supports single +5V operation with VCM = +2.5V. In this configuration, VH and VL are referenced to VCM (e.g., VH = VCM + 1.2V, VL = VCM – 1.2V), delivering a limited output swing of +1.1V to +3.9V. DC-coupled operation is enabled via proper input biasing and level-shifting networks.
What is the thermal resistance (θJA) of the OPA699IDG4 in SO-8 package?
The OPA699IDG4 in SO-8 (D) package has a junction-to-ambient thermal resistance (θJA) of 125°C/W under standard JEDEC 2-layer board conditions. With 15.5mA quiescent current at ±5V, power dissipation is ~155mW, resulting in ~19°C junction-to-ambient rise-well within the –40°C to +85°C operating range.
OPA699IDG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Discontinued at Digi-Key
- Amplifier Type:
- Voltage Feedback
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 1400V/µs
- Gain Bandwidth Product:
- 1 GHz
- -3db Bandwidth:
- 260 MHz
- Current - Input Bias:
- 3 µA
- Voltage - Input Offset:
- 1.5 mV
- Current - Supply:
- 15.5mA
- Current - Output / Channel:
- 120 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:
- 8-SOIC
OPA699IDG4 FAQ
1.How can I place an order for OPA699IDG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA699IDG4 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 OPA699IDG4 reliable?
The price and inventory of OPA699IDG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA699IDG4 is usually 5 days.
3.What payment methods are accepted for OPA699IDG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA699IDG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA699IDG4?
OPA699IDG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA699IDG4 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 OPA699IDG4?
For technical support, including OPA699IDG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA699IDG4 requirements.
6.How does Aetrix verify that OPA699IDG4 is sourced from the original manufacturer or authorized distributors?
All OPA699IDG4 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 OPA699IDG4 meets industry standards.
7.What is the process for return or replacement of OPA699IDG4?
All OPA699IDG4 units undergo pre-shipment inspection (PSI). If there is an issue with OPA699IDG4, 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 OPA699IDG4 part is unused and in its original packaging.
Return procedure for OPA699IDG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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