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Texas Instruments OPA690IDG4
- Part No.:
- OPA690IDG4
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA690IDG4.pdf
- Description:
- IC VOLTAGE FEEDBACK 1 CIRC 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,540
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Product details
Overview
OPA690IDG4 from Texas Instruments is a unity-gain stable, bipolar-input voltage-feedback operational amplifier optimized for high-speed signal conditioning. It delivers 535MHz small-signal bandwidth (G = 1), 1900V/µs slew rate into 100Ω, ±3.9V output swing, and 4.6nV/√Hz input voltage noise - enabling use in ADC buffer stages, transimpedance amplifiers, and video line drivers requiring fast settling (13ns) and low distortion.
For engineers reviewing the OPA690IDG4 datasheet, OPA690IDG4 pinout, OPA690IDG4 application, or OPA690IDG4 equivalent, this page provides verified package mapping (SOIC-8), disable-function timing (40ns enable / 600ns disable), thermal metrics (RθJA = 125°C/W), supply range (5–12V), and real-world design meaning for each key specification.
Technical Context
The OPA690IDG4 employs a proprietary bipolar input stage and high-current output architecture to achieve wideband performance while maintaining unity-gain stability - a capability historically limited to current-feedback op amps. Its disable control pin (DIS) enables rapid power-down to <100µA quiescent current with high-impedance output state, supporting portable instrumentation and burst-mode systems.
Unlike FET-input alternatives, the OPA690IDG4 trades higher input bias current (±10µA max) for superior slew rate and output drive (215mA sourcing), making it suitable for driving reactive loads and low-impedance transmission lines without external buffering. Its 6.1mA quiescent current at ±5V supports battery-powered operation when combined with DIS control.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Small-signal BW (G=1) | 535MHz - supports >200MS/s sampling in ADC driver applications with minimal gain peaking (1dB). |
| Slew rate | 1900V/µs - enables full-scale 4V step response in ≤2.3ns, critical for fast pulse and imaging channel fidelity. |
| Output current | ±215mA - drives 100Ω video lines or active filters directly without external buffers or heat sinks. |
| Input voltage noise | 4.6nV/√Hz - preserves SNR in precision high-frequency amplification (e.g., photodiode TIA front-ends). |
| Disable current | 100µA - reduces system standby power by >98% vs active mode (6.1mA), enabling energy-efficient sleep states. |
| Supply range | 5V to 12V - operates from single +5V or dual ±5V rails, compatible with legacy industrial and test equipment supplies. |
| Settling time (0.02%) | 13ns - meets timing budget for 12-bit+ ADCs sampling at ≥50MSPS with minimal aperture jitter contribution. |
Pinout & Package
The OPA690IDG4 is packaged in an 8-pin SOIC (D package), 4.9mm × 6mm body size, with exposed pad not present. Pin 1 and Pin 5 are no-connect (NC); all other pins match TI's standard SOIC-8 op amp layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 5 | No connection | Must remain unconnected; no internal function or bond wire. |
| 2 | Inverting input | Differential input node; requires matched trace length and impedance control for high-frequency stability. |
| 3 | Noninverting input | High-impedance input (38MΩ || 1pF common-mode); sensitive to PCB leakage and guard ring design. |
| 4 | –VS | Negative supply rail; must be decoupled with 100nF ceramic near pin to suppress PSRR degradation above 1MHz. |
| 6 | Output | Class-AB output stage capable of ±3.9V swing into open circuit; requires isolation resistor for capacitive loads >10pF. |
| 7 | +VS | Positive supply rail; shares same decoupling requirement as –VS; supports single-supply operation down to 5V total. |
| 8 | DIS | Active-low disable control; logic-high (>3.3V) enables operation; logic-low (<2.3V) disables output and reduces IQ to 100µA. |
Key Features
| Feature | Design Value |
|---|---|
| Unity-gain stable wideband operation | 535MHz SSBW at G = 1 eliminates need for external compensation networks in gain-of-1 buffer designs. |
| Integrated disable function | 40ns enable / 600ns disable timing allows precise synchronization with data acquisition windows or power sequencing controllers. |
| High-output-current architecture | 215mA sourcing capability drives 100Ω video loads or 50Ω RF traces without external emitter followers or MOSFET buffers. |
| Low-noise bipolar input stage | 4.6nV/√Hz input voltage noise at >1MHz enables high-fidelity signal amplification in xDSL line receivers and medical imaging front-ends. |
| Fast settling with low distortion | 13ns to 0.02% with –85dBc HD2 at 5MHz ensures accurate reproduction of multi-tone signals in active filter and DAC reconstruction paths. |
Applications
| ADC Buffers | Transimpedance Amplifiers |
|---|---|
Use Scenario: Driving the input of a 12-bit, 50MSPS analog-to-digital converter in a portable spectrum analyzer. IC Role / Device Role / Timing Role: High-speed buffer isolating ADC input from source impedance variations while preserving transient fidelity and minimizing aperture jitter. Use Value: 13ns settling time and 1900V/µs slew rate ensure full-scale steps settle within one sample period, preventing missing codes and harmonic distortion. | Use Scenario: Converting photocurrent from a high-bandwidth PIN diode in optical time-domain reflectometry (OTDR) equipment. IC Role / Device Role / Timing Role: Low-noise, high-gain transimpedance amplifier with wide closed-loop bandwidth for sub-nanosecond pulse detection. Use Value: 4.6nV/√Hz input voltage noise and 535MHz bandwidth maintain signal integrity for weak, fast-rising optical pulses without added Johnson noise. |
| Video Line Drivers | High-Speed Imaging Channels |
Use Scenario: Driving 75Ω coaxial video lines in broadcast-grade SDI signal distribution hardware. IC Role / Device Role / Timing Role: Output driver delivering ±3.9V swing into 75Ω with minimal group delay variation across DC–100MHz. Use Value: ±215mA output current sustains 5Vpp video signal levels over long cables without clipping or edge rounding. | Use Scenario: Signal conditioning in a CMOS image sensor readout chain for industrial machine vision cameras operating at 100fps+. IC Role / Device Role / Timing Role: Pixel column amplifier providing correlated double sampling (CDS) with ultra-fast reset and integration cycle timing. Use Value: 600ns disable time allows pixel-level power gating between frames, reducing dark current accumulation and thermal noise. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-speed op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA695IDBVR | Bipolar current-feedback architecture; 4300V/µs slew rate but not unity-gain stable (min G = 5). | Requires minimum gain ≥5; unsuitable for G = 1 buffer or unity-gain integrator configurations. | Select OPA695IDBVR only when fixed gain ≥5 is acceptable and maximum slew rate is prioritized over flexibility. |
| OPA817IDBVR | FET-input, 400MHz GBW, 1000V/µs slew rate, 4.5nV/√Hz noise; lower input bias current (±1pA typical). | Superior DC precision and high-Z inputs, but lower output drive (±80mA) limits reactive load handling. | Choose OPA817IDBVR for high-impedance sensor interfaces where low IB and low noise outweigh output current needs. |
Compared with OPA690IDG4, the OPA695IDBVR offers higher slew rate but sacrifices unity-gain stability and disable functionality, while the OPA817IDBVR improves input impedance and DC accuracy at the cost of output drive strength and disable control - making OPA690IDG4 the optimal choice for flexible, low-power, high-drive unity-gain applications.
Availability
OPA690IDG4 is available at Aetrix Electronics and suitable for high-speed imaging channels, ADC buffers, and portable instruments requiring stable component supply, consistent parametric performance across temperature (–40°C to +85°C), and long-term lifecycle support.
Supply support for OPA690IDG4 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 amp design and manufacturing.
The OPA690IDG4 belongs to TI's OPAx690 family of wideband voltage-feedback op amps, engineered specifically for applications demanding unity-gain stability, fast settling, and integrated power management - including test equipment, communications infrastructure, and medical imaging systems.
FAQ
What is the maximum small-signal bandwidth of the OPA690IDG4 at unity gain?
The OPA690IDG4 achieves a small-signal bandwidth of 535MHz at G = 1V/V under ±5V supply conditions with 0.5VPP output swing. This value is measured with RF = 25Ω and RL = 100Ω, and reflects its unity-gain stable architecture - a key differentiator among wideband voltage-feedback op amps. Bandwidth decreases predictably with increasing gain (e.g., 220MHz at G = 2).
How does the disable pin (DIS) function on the OPA690IDG4?
The DIS pin on the OPA690IDG4 is an active-low control input: pulling it below 2.3V (typical) disables the amplifier, reducing quiescent current to ≤200µA and placing the output in high-impedance state. When held high (>3.3V), the OPA690IDG4 operates normally. Enable time is 40ns and disable time is 600ns, enabling precise power gating in time-critical systems.
Can the OPA690IDG4 operate from a single +5V supply?
Yes, the OPA690IDG4 supports single-supply operation from +5V (with ground as –VS). In this configuration, input common-mode range extends from 1.15V to 3.85V, and output swings from 1.1V to 3.9V (RL = 100Ω to 2.5V). Designers must bias inputs within this range and verify headroom for desired output amplitude - the device does not support rail-to-rail input or output.
What is the output drive capability of the OPA690IDG4 into 100Ω loads?
The OPA690IDG4 delivers ±215mA sourcing/sinking current into 100Ω loads at ±5V supplies, enabling ±3.85V output swing. At +5V single supply, it sources up to 120mA and sinks up to –120mA into 100Ω referenced to midsupply (2.5V), yielding a 2.8VPP output envelope. Short-circuit current limit is ±250mA, protecting the output stage during fault conditions.
Is the OPA690IDG4 pin-compatible with other SOIC-8 op amps like the OPA691 or OPA695?
No, the OPA690IDG4 is not pin-compatible with the OPA691 or OPA695. While all three use SOIC-8 packages, their pinouts differ: OPA690IDG4 places DIS on Pin 8 and uses Pins 1 & 5 as NC, whereas OPA695IDBVR (SOT-23-6) and OPA691 (SOIC-8) assign different functions to Pin 8 (e.g., compensation or no function). Always verify pin configuration using TI's official OPA690IDG4 datasheet Figure 5-1 before board reuse.
OPA690IDG4 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:
- Voltage Feedback
- Number of Circuits:
- 1
- Output Type:
- -
- Slew Rate:
- 1800V/µs
- Gain Bandwidth Product:
- 300 MHz
- -3db Bandwidth:
- 500 MHz
- Current - Input Bias:
- 3 µA
- Voltage - Input Offset:
- 1 mV
- Current - Supply:
- 5.5mA
- Current - Output / Channel:
- 190 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
OPA690IDG4 FAQ
1.How can I place an order for OPA690IDG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA690IDG4 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 OPA690IDG4 reliable?
The price and inventory of OPA690IDG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA690IDG4 is usually 5 days.
3.What payment methods are accepted for OPA690IDG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA690IDG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA690IDG4?
OPA690IDG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA690IDG4 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 OPA690IDG4?
For technical support, including OPA690IDG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA690IDG4 requirements.
6.How does Aetrix verify that OPA690IDG4 is sourced from the original manufacturer or authorized distributors?
All OPA690IDG4 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 OPA690IDG4 meets industry standards.
7.What is the process for return or replacement of OPA690IDG4?
All OPA690IDG4 units undergo pre-shipment inspection (PSI). If there is an issue with OPA690IDG4, 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 OPA690IDG4 part is unused and in its original packaging.
Return procedure for OPA690IDG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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