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Texas Instruments OPA2205ADGKT
- Part No.:
- OPA2205ADGKT
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
OPA2205ADGKT.pdf
- Description:
- IC OPAMP
- Quantity:
- Payment:
- Shipping:
Inventory:732
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Product details
Overview
OPA2205ADGKT from Texas Instruments is a dual-channel, high-precision, bipolar e-trim™ operational amplifier with super-beta inputs, 25 µV max input offset voltage, ±0.2 µV/°C max offset drift, and 7.2 nV/√Hz voltage noise density at 1 kHz - designed for low-power, high-accuracy signal conditioning in precision analog front-ends.
For engineers reviewing the OPA2205ADGKT datasheet, OPA2205ADGKT pinout, OPA2205ADGKT application, or OPA2205ADGKT equivalent, this page delivers verified specifications, validated dual-channel SOIC-8 pin mapping, confirmed rail-to-rail output behavior, and two production-ready alternative op amps with documented performance trade-offs.
Technical Context
The OPA2205ADGKT implements TI's proprietary e-trim™ technology on a bipolar process to achieve ultra-low offset and drift without chopper-induced artifacts. Its super-beta input stage delivers 500 pA max input bias current and 110 fA/√Hz input current noise - enabling high-impedance sensor interfacing with minimal error contribution.
It features 3.6 MHz gain-bandwidth, 4 V/µs slew rate, >126 dB AOL/CMRR/PSRR across –40°C to +125°C, rail-to-rail output swing within 200 mV of rails (RL = 10 kΩ), and EMI/RFI-filtered inputs - all at 240 µA max quiescent current per amplifier.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Offset Voltage | ±15 µV max (high-grade); enables sub-16-bit DC accuracy in 24-bit DAQ systems without calibration. |
| Offset Drift | ±0.2 µV/°C max; ensures <1 µV total drift over 0–70°C industrial range - critical for uncalibrated field instrumentation. |
| Voltage Noise Density | 7.2 nV/√Hz at 1 kHz; supports low-noise amplification of microvolt-level sensor signals (e.g., strain gauges, thermopiles). |
| Gain Bandwidth Product | 3.6 MHz; allows stable closed-loop operation up to 100 kHz at unity gain - sufficient for fast-settling SMU feedback loops. |
| Quiescent Current | 240 µA per amplifier max; enables dual-channel precision amplification in battery-powered portable test equipment. |
| Supply Range | ±2.25 V to ±18 V (or 4.5 V to 36 V single); supports direct integration into industrial 24-V systems and isolated ±15-V analog modules. |
| Output Swing | Rail-to-rail; delivers full dynamic range into 10-kΩ loads - maximizes SNR in ADC driver stages without level-shifting. |
Pinout & Package
OPA2205ADGKT is packaged in an 8-pin SOIC (D package) with exposed pad (DGKT suffix denotes SOIC-8 with thermal pad). Pinout is fully compatible with industry-standard dual op amp footprints.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| +IN A (Pin 3) | Noninverting input, Channel A | High-impedance node (300 GΩ || 4.4 pF) for precision sensor signal routing; immune to EMI/RFI. |
| –IN A (Pin 2) | Inverting input, Channel A | Differential pair input with matched layout; enables accurate transimpedance or difference amplification. |
| +IN B (Pin 5) | Noninverting input, Channel B | Independent high-Z input for second signal path - supports dual-sensor monitoring or reference buffering. |
| –IN B (Pin 6) | Inverting input, Channel B | Matched to Channel A inputs; maintains channel-to-channel tracking in multi-channel acquisition systems. |
| OUT A (Pin 1) | Output, Channel A | Rail-to-rail capable; drives 10-kΩ loads to within 200 mV of supply rails - simplifies interface to SAR ADCs. |
| OUT B (Pin 7) | Output, Channel B | Independent output with identical drive capability; enables simultaneous dual-path signal conditioning. |
| V+ (Pin 8) | Positive supply | Accepts up to +18 V (dual) or +36 V (single); supports wide-input-range industrial power domains. |
| V– (Pin 4) | Negative supply | Accepts down to –18 V (dual) or ground (single); enables true bipolar or single-supply operation. |
Key Features
| Feature | Design Value |
|---|---|
| e-trim™ architecture | Eliminates laser trimming; achieves ±2 µV typical offset and ±0.04 µV/°C typical drift - no post-manufacture calibration needed. |
| Super-beta input stage | Delivers 100 pA typical input bias current - reduces voltage error across 10-MΩ source impedances to <1 µV. |
| Low 0.1–10 Hz noise | 0.2 µVPP integrated noise; preserves resolution in slow-sampling applications like pressure transmitter zero-drift compensation. |
| EMI/RFI filtered inputs | Rejects >80 dB of 900-MHz cellular interference - prevents corruption in noisy factory-floor instrumentation. |
| Overload power limiter | Prevents thermal runaway during output short-circuit events - enhances reliability in unattended field deployments. |
Applications
| Flow Transmitter | Data Acquisition (DAQ) |
|---|---|
Use Scenario: Amplifying low-level differential output from Coriolis or magnetic flow sensors in hazardous-area metering systems. IC Role / Device Role / Timing Role: Precision instrumentation amplifier front-end with dual-channel configuration for sensor excitation and signal readout. Use Value: ±0.2 µV/°C drift ensures <0.05% FS error over temperature - meets ANSI/ISA-71.04 Class G2 corrosion severity requirements. |
Use Scenario: Simultaneous conditioning of multiple sensor channels (thermocouple, RTD, strain gauge) in portable handheld analyzers. IC Role / Device Role / Timing Role: Dual-channel programmable-gain amplifier (PGA) stage with matched gain/offset tracking between channels. Use Value: 7.2 nV/√Hz noise and 3.6 MHz GBW enable 16-bit effective resolution at 100 kSPS - exceeds IEEE 1057 Class I DAQ standards. |
| Source Measurement Unit (SMU) | Lab Instrumentation |
Use Scenario: Precision current sourcing and voltage sensing in semiconductor parametric testers and battery cyclers. IC Role / Device Role / Timing Role: Dual-op-amp core for force-sense topology: one channel sources current, the other measures compliance voltage. Use Value: 25 µV max offset and rail-to-rail output allow sub-100-nA current accuracy and <100-µV voltage measurement resolution. |
Use Scenario: Low-drift reference buffer and filter stage in benchtop multimeters and calibrators operating from –40°C to +70°C ambient. IC Role / Device Role / Timing Role: High-stability unity-gain buffer for 10-V reference outputs and anti-aliasing filter driver. Use Value: >126 dB PSRR and CMRR ensure <1 ppm reference error under 100-mV supply ripple - satisfies IEC 61000-4-4 Level 3 immunity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision op amp applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2189IDR | Zero-drift auto-zero architecture; 50 nV/√Hz noise (higher than OPA2205ADGKT's 7.2 nV/√Hz); 0.005 µV/°C drift. | Better long-term stability but higher broadband noise - preferred for DC-critical, low-frequency (<10 Hz) applications only. | Select OPA2189IDR when ultra-low drift dominates over noise; avoid where sensor bandwidth exceeds 1 kHz. |
| ADA4522-2ARZ | Zero-drift; 5.8 nV/√Hz noise; 0.005 µV/°C drift; requires external capacitors for auto-zero clock filtering. | Lower noise than OPA2205ADGKT but adds board area and EMI sensitivity from external caps - less suitable for compact portable designs. | Choose ADA4522-2ARZ for lowest possible noise in fixed-installation lab gear; OPA2205ADGKT offers better integration and EMI robustness. |
Compared with OPA2189IDR and ADA4522-2ARZ, the OPA2205ADGKT delivers superior noise-performance balance (7.2 nV/√Hz) with no external components, making it optimal for battery-powered, space-constrained, and EMI-prone applications requiring both precision and reliability.
Availability
OPA2205ADGKT is available at Aetrix Electronics and suitable for flow transmitters, portable data acquisition systems, and source measurement units requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for OPA2205ADGKT 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 precision op amp design and manufacturing.
The OPA2205ADGKT belongs to TI's OPAx205 family - engineered specifically for high-accuracy, low-power industrial and test equipment where e-trim™ stability, super-beta input fidelity, and robust EMI immunity are mandatory.
FAQ
What is the maximum operating temperature range for the OPA2205ADGKT?
The OPA2205ADGKT is rated for continuous operation from –40°C to +125°C ambient temperature, with full electrical specifications guaranteed across this range - making it suitable for under-hood automotive sensors, industrial motor drives, and outdoor instrumentation enclosures.
Does the OPA2205ADGKT support single-supply operation?
Yes, the OPA2205ADGKT supports true single-supply operation from 4.5 V to 36 V. Its rail-to-rail output and input common-mode range extending to within 1 V of each rail enable use in 5-V, 12-V, and 24-V systems without level-shifting circuitry.
How does the e-trim™ technology in the OPA2205ADGKT differ from traditional laser trimming?
The OPA2205ADGKT uses TI's monolithic e-trim™ process - embedding nonvolatile memory and precision trimming circuitry directly into the die - eliminating mechanical stress-induced drift seen in laser-trimmed devices and achieving ±0.04 µV/°C typical drift without external calibration.
Can the OPA2205ADGKT drive capacitive loads without instability?
The OPA2205ADGKT is stable driving ≥25 pF capacitive loads at unity gain (phase margin ≥58°), and its overload recovery time remains ≤0.3 µs even with 100-pF loads - enabling direct connection to ADC input capacitors and long PCB traces in DAQ modules.
Is the OPA2205ADGKT pin-compatible with legacy OPA227 or OPA277 devices?
No, the OPA2205ADGKT uses a different pinout (e.g., OUT A on Pin 1, V+ on Pin 8) versus the OPA227 (OUT on Pin 1, V+ on Pin 7). Direct replacement requires PCB layout revision; however, its SOIC-8 footprint matches standard dual-op-amp land patterns.
OPA2205ADGKT 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:
- 2
- Output Type:
- Push-Pull
- Slew Rate:
- 4V/µs
- Gain Bandwidth Product:
- 3.6 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 100 pA
- Voltage - Input Offset:
- 8 µV
- Current - Supply:
- 220µA (x2 Channels)
- Current - Output / Channel:
- 25 mA
- Voltage - Supply Span (Min):
- 4.5 V
- Voltage - Supply Span (Max):
- 40 V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-VSSOP
OPA2205ADGKT FAQ
1.How can I place an order for OPA2205ADGKT through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA2205ADGKT 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 OPA2205ADGKT reliable?
The price and inventory of OPA2205ADGKT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA2205ADGKT is usually 5 days.
3.What payment methods are accepted for OPA2205ADGKT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA2205ADGKT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA2205ADGKT?
OPA2205ADGKT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA2205ADGKT 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 OPA2205ADGKT?
For technical support, including OPA2205ADGKT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA2205ADGKT requirements.
6.How does Aetrix verify that OPA2205ADGKT is sourced from the original manufacturer or authorized distributors?
All OPA2205ADGKT 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 OPA2205ADGKT meets industry standards.
7.What is the process for return or replacement of OPA2205ADGKT?
All OPA2205ADGKT units undergo pre-shipment inspection (PSI). If there is an issue with OPA2205ADGKT, 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 OPA2205ADGKT part is unused and in its original packaging.
Return procedure for OPA2205ADGKT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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