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Texas Instruments OPA206ADT
- Part No.:
- OPA206ADT
- Manufacturer:
- Texas Instruments
- Category:
- Instrumentation, Op Amps, Buffer Amps
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
OPA206ADT.pdf
- Description:
- PROTOTYPE
- Quantity:
- Payment:
- Shipping:
Inventory:2,290
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Product details
Overview
OPA206ADT from Texas Instruments is a single-channel, precision e-trim™ operational amplifier with integrated ±40-V input overvoltage protection beyond supplies, 25-µV max offset voltage, ±0.5-µV/°C max drift, 3.6-MHz gain-bandwidth product, and rail-to-rail output-designed for high-density analog input modules in industrial programmable logic controllers.
For engineers reviewing the OPA206ADT datasheet, OPA206ADT pinout, OPA206ADT application, or OPA206ADT equivalent, key selection criteria include input overvoltage tolerance up to ±40 V beyond rails, ultra-low 0.08-µV/°C typical drift, 240-µA max quiescent current, 8-nV/√Hz voltage noise, and SOIC-8 packaging compatible with space-constrained instrumentation PCB layouts.
Technical Context
The OPA206ADT implements super-beta bipolar input transistors with proprietary e-trim™ laser trimming to achieve sub-µV-level offset stability across –40°C to +125°C. Its input overvoltage protection activates automatically when common-mode voltage exceeds (V–) – 40 V or (V+) + 40 V, limiting input current to ≤10 mA without external clamping diodes.
This device delivers >124 dB AOL, CMRR, and PSRR across full temperature range while maintaining 4 V/µs slew rate and 0.2 µVPP 0.1-Hz to 10-Hz noise-enabling high-precision DC-coupled signal conditioning in source measurement units and digital multimeters where long-term drift and EMI immunity are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Offset voltage | ±25 µV (max); enables <0.001% gain error in 16-bit DAQ front-ends at room temperature |
| Offset drift | ±0.5 µV/°C (max); ensures <10 µV total drift over –40°C to +125°C operating range |
| Input overvoltage protection | ±40 V beyond supplies; eliminates need for external TVS or series resistors in field-connected sensor interfaces |
| Gain-bandwidth product | 3.6 MHz; supports stable closed-loop operation up to 100-kHz bandwidth with unity-gain stability |
| Quiescent current | 240 µA (max); allows battery-powered portable instrumentation with multi-year runtime |
| Voltage noise density | 8 nV/√Hz at 1 kHz; maintains SNR >100 dB in low-frequency precision amplification stages |
| Supply range | ±2.25 V to ±18 V dual or 4.5 V to 36 V single; interoperable with legacy ±15-V and modern 24-V industrial rails |
Pinout & Package
OPA206ADT is housed in an 8-pin SOIC (D package) with exposed pad not connected internally. Pin 1 and Pin 5 are no-connect terminals; Pin 4 is V– (negative supply); Pin 7 is V+ (positive supply); Pin 2 and Pin 3 serve as inverting and noninverting inputs respectively; Pin 6 is the rail-to-rail output.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| +IN (Pin 3) | Noninverting input | High-impedance (300 GΩ || 4.4 pF) node for precision voltage sensing with <500 pA bias current |
| –IN (Pin 2) | Inverting input | Differential input terminal enabling accurate current-to-voltage conversion in transimpedance configurations |
| OUT (Pin 6) | Amplifier output | Rail-to-rail swing within 200 mV of supplies into 10-kΩ load; drives ADC reference buffers directly |
| V+ (Pin 7) | Positive supply | Highest potential supply rail; must be ≥4.5 V above V– for valid operation |
| V– (Pin 4) | Negative supply | Lowest potential supply rail; supports true dual-supply or single-supply operation down to ground |
| NC (Pins 1, 5, 8) | No internal connection | May be left floating or tied to ground for mechanical stability; no electrical function |
Key Features
| Feature | Design Value |
|---|---|
| e-trim™ offset calibration | ±4 µV typical offset with ±0.08 µV/°C typical drift-reducing system calibration frequency in metrology-grade instruments |
| Super beta input stage | 500 pA max input bias current and 110 fA/√Hz current noise-minimizing voltage errors in high-impedance pH or thermocouple sensor interfaces |
| EMI/RFI filtered inputs | 120-dB EMIRR at 900 MHz-suppressing RF-induced errors in noisy factory-floor environments without added shielding |
| Rail-to-rail output | Swings to within 200 mV of either rail under 10-kΩ load-maximizing dynamic range when interfacing with 3.3-V or 5-V SAR ADCs |
| Overload power limiter | Prevents thermal runaway during sustained output short-circuit-enabling robust operation in unattended industrial data loggers |
Applications
| Analog Input Module | Mixed I/O Module |
|---|---|
Use Scenario: High-density 16-channel analog input card in PLC rack receiving 4–20-mA current loops and ±10-V sensor signals from field transmitters. IC Role / Device Role / Timing Role: Precision signal conditioner providing input overvoltage protection, low-drift amplification, and rail-to-rail buffering before multiplexed ADC sampling. Use Value: Eliminates discrete protection circuitry per channel, reducing BOM count by 3 components/channel and PCB area by 12 mm² per op amp. | Use Scenario: Modular I/O base supporting simultaneous AI, AO, DI, and DO functions in distributed control systems with shared backplane power. IC Role / Device Role / Timing Role: Input amplifier for isolated analog inputs, leveraging ±40-V OVP to tolerate wiring faults and ground differentials across multiple field zones. Use Value: Enables single-part-number design across AI and AO channels, simplifying inventory and qualification for safety-critical train control applications. |
| Source Measurement Unit | Digital Multimeter |
Use Scenario: Benchtop SMU performing four-quadrant sourcing and nanovolt-level voltage measurements on semiconductor devices under test. IC Role / Device Role / Timing Role: Front-end integrator and feedback amplifier in precision current source architecture, requiring ultra-low drift and low 1/f noise. Use Value: Achieves <100-nV/°C effective drift contribution to full-scale accuracy, meeting Class I DMM specifications per IEC/EN 61000-4-30. | Use Scenario: Portable handheld DMM measuring DC voltage, resistance, and continuity in utility substations with high EMI exposure. IC Role / Device Role / Timing Role: Buffer and gain stage in auto-ranging input path, rejecting common-mode noise from 50/60-Hz magnetic fields and RF interference. Use Value: Delivers 85-dB CMRR at 1 kHz and >120-dB EMIRR-ensuring stable readings even near arc-flash sources or VFDs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision operational amplifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| OPA2206DR | Dual-channel version in same SOIC-8 package; identical specs per channel except higher total IQ (480 µA max) | Reduces component count in dual-sensor or differential-input designs but requires layout revision for second channel routing | Select when board space permits dual functionality and inter-channel matching is required |
| OPA2189IDR | No input overvoltage protection; lower 5.2-nV/√Hz noise and 0.005-µV/°C max drift-but requires external ±36-V clamping | Better suited for lab-grade bench instruments where input protection is implemented at system level | Choose only if OVP is handled externally and sub-µV/°C drift is mandatory for metrology traceability |
Compared with OPA206ADT, OPA2206DR offers channel integration at doubled IQ, while OPA2189IDR trades built-in OVP for superior noise and drift-making OPA206ADT optimal for ruggedized field instrumentation where protection and reliability outweigh marginal noise gains.
Availability
OPA206ADT is available at Aetrix Electronics and suitable for analog input modules, mixed I/O systems, and portable instrumentation requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for OPA206ADT 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 company specializing in analog and embedded processing technologies, with leadership in precision amplifiers, data converters, and power management ICs.
The OPAx206 family extends TI's e-trim™ op amp platform with integrated input overvoltage protection-targeting industrial automation, test equipment, and energy infrastructure applications demanding fault-tolerant signal conditioning.
FAQ
What is the maximum input overvoltage tolerance of the OPA206ADT?
The OPA206ADT provides integrated input overvoltage protection up to ±40 V beyond the supply rails-meaning it withstands common-mode voltages from (V–) – 40 V to (V+) + 40 V without damage or latch-up. This specification holds across the full –40°C to +125°C operating temperature range and eliminates the need for external protection components in harsh industrial environments where sensor wiring faults or transient surges occur.
Does the OPA206ADT support single-supply operation?
Yes, the OPA206ADT supports true single-supply operation from 4.5 V to 36 V. Its input common-mode range extends from (V–) + 1 V to (V+) – 1.4 V, and its rail-to-rail output swings within 200 mV of both supply rails under 10-kΩ load. This enables direct interfacing with 3.3-V or 5-V microcontrollers and ADCs in battery-powered portable instrumentation without level-shifting circuitry.
How does the e-trim™ technology in the OPA206ADT improve long-term stability?
The e-trim™ technology in the OPA206ADT uses laser trimming of internal thin-film resistors to achieve ±4 µV typical input offset voltage and ±0.08 µV/°C typical drift-significantly better than standard bipolar op amps. This reduces initial calibration burden and minimizes recalibration intervals in field-deployed equipment such as digital multimeters and source measurement units where measurement integrity must be maintained over years of operation.
Can the OPA206ADT drive capacitive loads without instability?
The OPA206ADT is specified to drive up to 30 pF capacitive load with 67° phase margin and stable step response. For larger loads, a small isolation resistor (e.g., 25 Ω) between amplifier output and capacitance restores stability-verified in Figure 5-33 and Figure 5-34 of the datasheet. This capability supports direct connection to ADC input capacitors and long PCB traces in modular I/O systems without added compensation networks.
What is the typical quiescent current of the OPA206ADT at 25°C?
The typical quiescent current of the OPA206ADT is 220 µA at 25°C, with a maximum of 240 µA across all operating conditions. This ultra-low power consumption enables use in energy-harvesting sensor nodes and battery-backed data loggers where average current draw must remain below 1 mA per channel-supporting multi-year operation on coin-cell batteries in remote monitoring applications.
OPA206ADT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- e-trim™
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Amplifier Type:
- General Purpose
- Number of Circuits:
- 1
- Output Type:
- Push-Pull, Rail-to-Rail
- Slew Rate:
- 4V/µs
- Gain Bandwidth Product:
- 3.6 MHz
- -3db Bandwidth:
- -
- Current - Input Bias:
- 100 pA
- Voltage - Input Offset:
- 4 µV
- Current - Supply:
- 220µA
- Current - Output / Channel:
- 25 mA
- Voltage - Supply Span (Min):
- 4.5 V
- Voltage - Supply Span (Max):
- 36 V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
OPA206ADT FAQ
1.How can I place an order for OPA206ADT through Aetrix?
Please submit a Request for Quotation (RFQ) for OPA206ADT 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 OPA206ADT reliable?
The price and inventory of OPA206ADT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for OPA206ADT is usually 5 days.
3.What payment methods are accepted for OPA206ADT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for OPA206ADT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for OPA206ADT?
OPA206ADT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your OPA206ADT 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 OPA206ADT?
For technical support, including OPA206ADT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your OPA206ADT requirements.
6.How does Aetrix verify that OPA206ADT is sourced from the original manufacturer or authorized distributors?
All OPA206ADT 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 OPA206ADT meets industry standards.
7.What is the process for return or replacement of OPA206ADT?
All OPA206ADT units undergo pre-shipment inspection (PSI). If there is an issue with OPA206ADT, 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 OPA206ADT part is unused and in its original packaging.
Return procedure for OPA206ADT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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