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Texas Instruments OPA699IDR
- Part No.:
- OPA699IDR
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA699IDR.pdf
- Description:
- IC VOLTAGE FEEDBACK 1 CIRC 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,259
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Product details
Overview
OPA699IDR 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 high-speed ADC input driver in IF signal chains requiring fast overdrive recovery and precise amplitude control.
For engineers reviewing the OPA699IDR datasheet, OPA699IDR pinout, OPA699IDR application, or OPA699IDR equivalent, key selection criteria include limiting accuracy under ±5V supply, 1ns recovery time from overdrive, gain stability at G ≥ +4, large-signal bandwidth (290MHz), and SO-8 package compatibility with standard op amp layouts.
Technical Context
The OPA699IDR implements an output-stage limiting architecture where two buffered limiter pins (VH and VL) directly clamp the output voltage with ±10mV offset error, independent of closed-loop gain. Its linear operation extends to within 20mV of the limits, enabling tight guardbanding (30mV linearity margin at 5MHz).
It supports dual-supply (±5V) and single-supply (+5V) operation with VCM-referenced limiting, features 600MHz limiter small-signal bandwidth and 125V/µs limiter slew rate in limit mode, and maintains 70dB+ PSRR and 61dB+ CMRR across 10kHz–10MHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| –3dB Bandwidth (G = +6) | 260MHz - enables baseband-to-IF amplification up to UHF without gain peaking degradation |
| Gain Bandwidth Product | 1000MHz - supports stable closed-loop gains ≥ +4 while preserving high-frequency response |
| Slew Rate | 1400V/µs - ensures faithful reproduction of fast transient signals (e.g., radar pulses, digital eye diagrams) |
| Limiter Voltage Accuracy | ±10mV - guarantees precise ADC input protection thresholds without calibration overhead |
| Recovery Time from Limit | 1ns - minimizes signal distortion during burst-mode or intermittent overdrive events |
| Supply Voltage Range | ±5V (spec), ±6.5V (max) - compatible with standard analog signal chain rails and industrial power domains |
| Input Noise Density | 4.1nV/√Hz - preserves SNR in low-level RF/IF amplification stages before digitization |
Pinout & Package
The OPA699IDR is housed in an industry-standard SO-8 package (D package), thermally rated for 125°C/W junction-to-ambient, with exposed pad not present and RoHS-compliant lead finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (NC) | No Connection | Unbonded die pad; must remain floating or grounded per layout best practices |
| 2 (Inverting Input) | Inverting Input Terminal | High-impedance node (0.32MΩ || 1pF) accepting feedback network for precision gain setting |
| 3 (Noninverting Input) | Noninverting Input Terminal | DC-coupled signal entry point; bias current cancellation requires matched source impedance |
| 4 (–VS) | Negative Supply Rail | Connects to –5V rail; bypassed with 2.2µF electrolytic + 0.1µF ceramic for stability |
| 5 (VH) | Upper Limiter Control Pin | Accepts external voltage reference (e.g., +2V) to set positive output limit; draws ±50µA bias current |
| 6 (+VS) | Positive Supply Rail | Connects to +5V rail; same bypassing as –VS for symmetrical PSRR performance |
| 7 (Output) | Amplified Output Node | Drives 500Ω loads with ±4.1V swing; capable of ±120mA sourcing/sinking into resistive loads |
| 8 (VL) | Lower Limiter Control Pin | Accepts external voltage reference (e.g., –2V) to set negative output limit; polarity opposite VH |
Key Features
| Feature | Design Value |
|---|---|
| Fast overdrive recovery | 1ns recovery ensures minimal dead time between saturated events in burst-mode receivers |
| Bipolar output limiting | Independent VH/VL pins enable asymmetric clipping for DC-biased signal paths (e.g., single-supply IF amps) |
| Stable at G ≥ +4 | Eliminates need for external compensation networks in most gain configurations |
| Low limiting offset | ±10mV accuracy allows direct use of limiter thresholds as ADC full-scale references |
| High SFDR | 87dB odd-order SFDR at 5MHz supports clean digitization of narrowband IF signals |
Applications
| Transimpedance Amplifier with Fast Overdrive Recovery | Fast Limiting ADC Input Driver |
|---|---|
Use Scenario: Photodiode current-to-voltage conversion in optical time-of-flight sensors where pulse bursts cause momentary saturation. IC Role / Device Role / Timing Role: Transimpedance amplifier with integrated output limiting prevents ADC front-end damage during laser pulse reflections. Use Value: 1ns recovery time restores linear operation before next pulse arrival, eliminating blanking intervals and preserving timing resolution. | Use Scenario: Driving the input of a 12-bit, 100MSPS ADC in a software-defined radio receiver handling variable-amplitude IF signals. IC Role / Device Role / Timing Role: High-fidelity gain stage with programmable clipping thresholds protecting ADC input from overvoltage without external diodes. Use Value: ±10mV limiter accuracy sets exact full-scale input range, reducing post-processing gain correction and improving ENOB consistency. |
| Low Propagation Delay Comparator | IF Limiting Amplifier |
Use Scenario: Zero-crossing detection in high-frequency clock recovery circuits where sub-nanosecond delay matching is critical. IC Role / Device Role / Timing Role: Open-loop comparator substitute leveraging fast slew rate and sharp limiting transition for edge timing. Use Value: 1.6ns rise/fall time and <8ns 0.05% settling enable accurate phase alignment in 500MHz clock domains. | Use Scenario: Amplitude stabilization in 70MHz IF strips of satellite communication modems subject to fading and interference. IC Role / Device Role / Timing Role: Wideband limiting amplifier maintaining constant envelope for downstream demodulation stages. Use Value: 260MHz bandwidth and 600MHz limiter bandwidth preserve modulation fidelity while suppressing impulse noise spikes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar voltage-limiting amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA698IDR | Unity-gain stable; lower gain bandwidth product (800MHz); optimized for G = +1 to +2 | Better SFDR at low gains; less suitable for G ≥ +4 due to reduced phase margin | Select when unity-gain buffering or low-gain limiting is required with improved distortion performance |
| LMH6723MA/NOPB | No integrated limiting; higher slew rate (3100V/µs); wider GBW (1.8GHz); no VH/VL pins | Requires external clamping circuitry; adds board area, parasitics, and recovery latency | Select when maximum speed is prioritized over integrated protection and board space is unconstrained |
Compared with OPA699IDR, OPA698IDR offers superior distortion at low gains but lacks the 260MHz bandwidth and ±10mV limiting accuracy needed for precision ADC driving; LMH6723MA/NOPB delivers higher raw speed but increases design complexity and reduces overdrive resilience without on-chip limiting.
Availability
OPA699IDR is available at Aetrix Electronics and suitable for high-speed data acquisition systems, RF receiver front-ends, and test equipment requiring stable component supply with guaranteed long-term availability and traceable lot control.
Supply support for OPA699IDR 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 OPA699IDR belongs to TI's OPAx699 family of wideband limiting amplifiers, designed specifically for high-fidelity, overdrive-tolerant signal conditioning in communications, instrumentation, and defense electronics.
FAQ
What is the maximum operating supply voltage for the OPA699IDR?
The OPA699IDR supports a maximum supply voltage of ±6.5V across its +VS and –VS pins. Operation beyond this rating risks permanent damage. The device is fully specified at ±5V, where it delivers 260MHz bandwidth, 1400V/µs slew rate, and ±10mV limiting accuracy. At ±6V, quiescent current increases to 16.6mA max, and thermal derating must be applied per the 125°C/W θJA specification.
How does the OPA699IDR achieve ±10mV limiting voltage accuracy?
The OPA699IDR achieves ±10mV limiting voltage accuracy through a dedicated output-stage limiting architecture that buffers the VH and VL control pins directly to internal clamping transistors. This eliminates gain-dependent errors seen in input-stage limiters. The ±10mV tolerance is tested over temperature (–40°C to +85°C) and applies to both upper (VH) and lower (VL) limits, ensuring consistent ADC protection thresholds across environmental conditions.
Can the OPA699IDR operate from a single +5V supply?
Yes, the OPA699IDR supports single +5V operation with a mid-rail common-mode voltage (e.g., 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 range of VCM ±1.6V at room temperature. The device maintains 234MHz small-signal bandwidth and 1050V/µs slew rate under +5V bias, making it suitable for portable IF amplifiers and battery-powered instrumentation.
What is the purpose of the NC pin (Pin 1) on the OPA699IDR SO-8 package?
Pin 1 of the OPA699IDR is designated NC (No Connection) and corresponds to an unconnected die bond pad. It must not be tied to any voltage or signal net. TI recommends leaving Pin 1 floating or connecting it to ground only if required by PCB mechanical constraints-never to a supply or signal-since unintended coupling could degrade PSRR or introduce instability in high-frequency layouts.
Does the OPA699IDR require external compensation for stability at G = +6?
No, the OPA699IDR is internally compensated and stable for closed-loop gains ≥ +4V/V without external components. At G = +6, it exhibits 7.5dB gain peaking (typical) and maintains >45° phase margin across its 260MHz bandwidth. For gains below +4, external compensation (e.g., feedback capacitor) is required to prevent oscillation, as the device is not unity-gain stable-this distinguishes it from the related OPA698IDR.
OPA699IDR 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:
- 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
OPA699IDR FAQ
1.How can I place an order for OPA699IDR through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA699IDR 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 OPA699IDR reliable?
The price and inventory of OPA699IDR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA699IDR is usually 5 days.
3.What payment methods are accepted for OPA699IDR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA699IDR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA699IDR?
OPA699IDR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA699IDR 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 OPA699IDR?
For technical support, including OPA699IDR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA699IDR requirements.
6.How does Aetrix verify that OPA699IDR is sourced from the original manufacturer or authorized distributors?
All OPA699IDR 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 OPA699IDR meets industry standards.
7.What is the process for return or replacement of OPA699IDR?
All OPA699IDR units undergo pre-shipment inspection (PSI). If there is an issue with OPA699IDR, 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 OPA699IDR part is unused and in its original packaging.
Return procedure for OPA699IDR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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