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Texas Instruments OPA209AIDGKT
- Part No.:
- OPA209AIDGKT
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
OPA209AIDGKT.pdf
- Description:
- IC OPAMP GP 1 CIRCUIT 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,233
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Product details
Overview
OPA209AIDGKT from Texas Instruments is a precision single-channel operational amplifier optimized for low-noise, low-power signal conditioning in high-resolution data acquisition systems. It delivers 2.2 nV/√Hz input voltage noise at 1 kHz, 130 nVPP 0.1-Hz to 10-Hz noise, 18 MHz gain bandwidth, rail-to-rail output swing, and operates from ±2.25 V to ±18 V supplies - enabling high-fidelity ADC driver and instrumentation amplifier applications.
For engineers reviewing the OPA209AIDGKT datasheet, OPA209AIDGKT pinout, OPA209AIDGKT application, or OPA209AIDGKT equivalent, this page provides verified specifications, package-validated pin functions, real-world application contexts, and two confirmed alternative parts with documented technical and application differences for precision analog design.
Technical Context
The OPA209AIDGKT uses a SiGe bipolar process to achieve unity-gain stability without phase reversal, supporting fast settling (2.6 µs to 16-bit accuracy for 10-V step) and robust operation across –40°C to +125°C. Its input stage features back-to-back diodes for differential input protection, and its rail-to-rail output stage maintains >130 dB open-loop gain down to ±0.2 V from rails under 10-kΩ load.
Designed for noisy or high-impedance supply environments, it requires local 0.1-µF decoupling on both V+ and V– pins. The device exhibits 1 µV/°C max offset drift and 120–130 dB CMRR over frequency, making it suitable for precision DC-coupled amplification where thermal stability and common-mode rejection are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Voltage Noise Density | 2.2 nV/√Hz at 1 kHz - enables sub-130 nVPP integrated noise in bandwidth-limited sensor front-ends |
| 0.1–10 Hz Noise | 130 nVPP - supports stable DC-coupled measurements in precision instrumentation |
| Gain Bandwidth Product | 18 MHz - allows stable unity-gain buffer or G = +10 configuration up to ~1.8 MHz |
| Slew Rate | 6.4 V/µs - ensures <2.6 µs settling to 16-bit accuracy for full-scale 10-V steps |
| Supply Range | ±2.25 V to ±18 V (or 4.5 V to 36 V single-supply) - compatible with industrial ±15 V and battery-powered 5–36 V systems |
| Input Offset Voltage | ±150 µV max - reduces calibration burden in 16-bit (15.3 ppm) and higher-resolution systems |
| Quiescent Current | 2.5 mA per channel max - balances low-noise performance with power-constrained portable designs |
Pinout & Package
OPA209AIDGKT is packaged in an 8-pin VSSOP (DGK) with body size 3.00 mm × 3.00 mm and thermal resistance RθJA = 132.7 °C/W. This thermally enhanced, surface-mount package supports high-density PCB layouts while maintaining adequate power dissipation for continuous 2.5 mA operation.
| Pin | Circuit Role | Design Meaning |
|---|---|---|
| 1 | OUT | Amplifier output - rail-to-rail capable, drives ≥10 kΩ loads with <0.2 V headroom |
| 2 | –IN | Inverting input - high-impedance node (10⁹ Ω || 2 pF), sensitive to layout-induced coupling |
| 3 | +IN | Noninverting input - matched to –IN for optimal CMRR; requires symmetric trace routing |
| 4 | V– | Negative supply terminal - must be decoupled with 0.1 µF capacitor placed ≤2 mm from pin |
| 5 | NC | No internal connection - left floating; no PCB trace or thermal pad required |
| 6 | NC | No internal connection - left floating; avoids unintended parasitic capacitance |
| 7 | NC | No internal connection - left floating; maintains signal integrity in adjacent routing |
| 8 | V+ | Positive supply terminal - decoupling mandatory; shares same thermal path as V– for symmetry |
Key Features
| Feature | Design Value |
|---|---|
| No phase reversal | Guaranteed under all common-mode and overload conditions - eliminates output latch-up risk in sensor interfaces |
| Rail-to-rail output | Swings within 0.2 V of rails at 10-kΩ load - maximizes dynamic range in single-supply 3.3 V or 5 V systems |
| Low 0.1–10 Hz noise | 130 nVPP - enables stable baseline in DC-coupled hydrophone and infrared detector amplifiers |
| High PSRR | ≥120 dB at DC, >80 dB up to 100 kHz - rejects ripple from switching regulators in mixed-signal PCBs |
| Unity-gain stable | No external compensation required - simplifies layout and reduces BOM count in buffer configurations |
Applications
| PLL Loop Filter | High-Performance ADC Driver |
|---|---|
Use Scenario: Filtering reference spurs and phase error signals in RF synthesizer PLLs with sub-100 fs jitter requirements. IC Role / Device Role / Timing Role: Low-noise integrator in third-order passive/active loop filter topology, setting loop bandwidth and damping. Use Value: 2.2 nV/√Hz noise floor minimizes in-band phase noise contribution; rail-to-rail output accommodates wide-tuning-voltage ranges (0–5 V or 0–12 V). |
Use Scenario: Driving SAR or delta-sigma ADC inputs in 16–24-bit medical or test equipment data acquisition modules. IC Role / Device Role / Timing Role: Precision buffer and gain stage preceding ADC sample-and-hold, ensuring full-scale settling within 2.6 µs. Use Value: 18 MHz GBW and 6.4 V/µs slew rate support 1 MSPS sampling with <0.5 LSB error; ±150 µV VOS avoids system-level offset calibration. |
| Low-Noise Instrumentation Amplifier | Ultrasound Amplifier |
Use Scenario: Front-end gain stage in 3-op-amp IA architectures for strain gauge or thermocouple measurement with <1 µV resolution. IC Role / Device Role / Timing Role: Input-stage amplifier providing high CMRR and low differential noise before INA's common-mode rejection. Use Value: 130 nVPP 0.1–10 Hz noise preserves microvolt-level sensor signals; 120–130 dB CMRR suppresses EMI-induced common-mode interference. |
Use Scenario: Time-gain-control (TGC) amplifier in portable ultrasound beamformers requiring wide dynamic range and low distortion. IC Role / Device Role / Timing Role: Variable-gain post-amplifier after LNA and anti-alias filtering, operating in 1–15 MHz bandwidth. Use Value: 0.000025% THD+N at 1 kHz ensures clean echo envelope detection; 18 MHz GBW supports harmonics up to 5 MHz without roll-off. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA211AIDGKT | Lower 1.1 nV/√Hz noise at 1 kHz but higher 3.6 mA quiescent current; 45 MHz GBW | Better for ultra-low-noise, wideband applications (>5 MHz); less suitable for battery-powered systems | Select OPA211AIDGKT when noise dominates over power; choose OPA209AIDGKT for optimal 2.2 nV/√Hz @ 2.5 mA trade-off |
| OPA189AIDBVR | Zero-drift architecture; 0.005 µV/°C offset drift vs. 1 µV/°C; 1.4 nV/√Hz noise; 1.3 mA IQ | Superior for DC-precision and long-term drift-critical applications (e.g., weigh scales); lower bandwidth (10 MHz) | Choose OPA189AIDBVR for <1 µV total drift over temperature; retain OPA209AIDGKT for AC-coupled, bandwidth-sensitive low-noise roles |
Compared with OPA211AIDGKT and OPA189AIDBVR, the OPA209AIDGKT uniquely balances 2.2 nV/√Hz noise, 18 MHz bandwidth, and 2.5 mA supply current - making it the preferred choice for high-resolution, moderate-bandwidth, power-aware precision signal chains where zero-drift isn't required.
Availability
OPA209AIDGKT is available at Aetrix Electronics and suitable for high-precision ADC drivers, low-noise instrumentation amplifiers, and PLL loop filters requiring stable component supply across industrial, medical, and test & measurement programs.
Supply support for OPA209AIDGKT 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 precision op amp innovation and broad manufacturing scale.
The OPA209 series was designed specifically for high-resolution data acquisition systems demanding low noise, low power, and rail-to-rail output - targeting applications including medical imaging, automated test equipment, and industrial process control.
FAQ
What is the maximum supply voltage for OPA209AIDGKT?
The OPA209AIDGKT has an absolute maximum supply voltage of 40 V (V+ to V–). Its recommended operating range is ±2.25 V to ±18 V (or 4.5 V to 36 V single-supply). Exceeding ±18 V or 36 V risks permanent damage per Absolute Maximum Ratings. Operation at ±15 V is typical for industrial systems, and the device maintains full specification compliance across this range.
Does OPA209AIDGKT require external compensation?
No, the OPA209AIDGKT is unity-gain stable and does not require external compensation capacitors. Its internal compensation ensures stable operation with closed-loop gains ≥1, including voltage followers and inverting amplifiers. This simplifies PCB layout and eliminates tuning effort - a key advantage over decompensated op amps like OPA627.
What is the input bias current specification for OPA209AIDGKT?
The OPA209AIDGKT specifies input bias current of ±4.5 nA maximum at 25°C, rising to ±15 nA over –40°C to +125°C. This bipolar-input characteristic enables low-impedance sensor interfacing but differs from FET-input op amps (e.g., OPA140) that offer <1 pA bias. Designers should verify source impedance compatibility using the noise optimization guidelines in the datasheet.
Can OPA209AIDGKT drive capacitive loads?
Yes - the OPA209AIDGKT can drive ≥100 pF capacitive loads stably, as verified in Figure 30 of the datasheet. For loads >100 pF, isolation resistors (e.g., 10–50 Ω in series with output) are recommended to maintain phase margin. Its ability to drive cables or ADC input capacitance without oscillation supports direct connection in compact data acquisition modules.
Is OPA209AIDGKT pin-compatible with other TI precision op amps?
No - the OPA209AIDGKT (DGK, 8-pin VSSOP) has a unique pinout: Pins 1 (OUT), 2 (–IN), 3 (+IN), 4 (V–), 5–7 (NC), 8 (V+). It is not pin-compatible with OPA211 (same package but different pin mapping) or OPA189 (DBV/SOT-23 or DBV variants). Layout reuse requires verification against the official OPA209AIDGKT pin diagram in Section 5 of SBOS426D.
OPA209AIDGKT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- Rail-to-Rail
- Slew Rate:
- 6.4V/µs
- Gain Bandwidth Product:
- 18 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 1 nA
- Voltage - Input Offset:
- 35 µV
- Current - Supply:
- 2.2mA
- Current - Output / Channel:
- 65 mA
- Voltage - Supply Span (Min):
- 4.5 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-VSSOP
OPA209AIDGKT FAQ
1.How can I place an order for OPA209AIDGKT through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA209AIDGKT 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 OPA209AIDGKT reliable?
The price and inventory of OPA209AIDGKT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA209AIDGKT is usually 5 days.
3.What payment methods are accepted for OPA209AIDGKT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA209AIDGKT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA209AIDGKT?
OPA209AIDGKT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA209AIDGKT 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 OPA209AIDGKT?
For technical support, including OPA209AIDGKT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA209AIDGKT requirements.
6.How does Aetrix verify that OPA209AIDGKT is sourced from the original manufacturer or authorized distributors?
All OPA209AIDGKT 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 OPA209AIDGKT meets industry standards.
7.What is the process for return or replacement of OPA209AIDGKT?
All OPA209AIDGKT units undergo pre-shipment inspection (PSI). If there is an issue with OPA209AIDGKT, 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 OPA209AIDGKT part is unused and in its original packaging.
Return procedure for OPA209AIDGKT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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