OPA206 - 240uA Low-Noise Precision Op Amp, OVP | TI
MPN: OPA206 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.1 | $3.10 |
| 10 | $2.79 | $27.90 |
| 100 | $2.48 | $248.00 |
| 500 | $2.23 | $1,115.00 |
| 1,000 | $1.98 | $1,980.00 |
Drop-in alternatives for OPA206 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
OPA205
✅ Drop-In📋 Reference alternative (not in catalog)
OPA277
✅ Drop-In📋 Reference alternative (not in catalog)
OPA2206
✅ Drop-In📋 Reference alternative (not in catalog)
ADA4522-1ARZ
✅ Drop-In✓ In Stock
$1.42 / Unit
View Datasheet →OPA206 Maximum Ratings & Electrical Characteristics
| Number of Channels | 1 |
| Quiescent Current (per amp) | 240 uA |
| Input Voltage Noise Density | 8 nV/rtHz |
| Input Offset Voltage (max) | 25 uV |
| Offset Voltage Drift (max) | 0.5 uV/degC |
| Input Bias Current (max) | 500 pA |
| Input Overvoltage Protection | Up to 40 V beyond supplies |
| Input Technology | Super-beta, e-trim(TM) trimmed |
| Output Type | Push-Pull, Rail-to-Rail |
| Package | 8-SOIC |
| Mounting Type | Surface Mount |
| Amplifier Class | Precision Operational Amplifier |
| Family | OPAx206 (next generation of OPAx277) |
| Gain Bandwidth Product | [DATA_NEEDED: GBW] |
| Supply Voltage Range | [DATA_NEEDED: supply voltage range] |
| Operating Temperature | [DATA_NEEDED: temperature range] |
| RoHS Status | Compliant |
OPA206 Pin Configuration
| Pin 1 | TRIM/NULL — Offset trim [DATA_NEEDED: exact pin function per datasheet] |
| Pin 2 | -IN — Inverting input (OVP protected) |
| Pin 3 | +IN — Non-inverting input (OVP protected) |
| Pin 4 | V- — Negative supply |
| Pin 5 | TRIM/NULL — Offset trim [DATA_NEEDED: exact pin function per datasheet] |
| Pin 6 | OUT — Rail-to-rail push-pull output |
| Pin 7 | V+ — Positive supply |
| Pin 8 | NC/TRIM — [DATA_NEEDED: exact pin function per datasheet] |
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this component. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
OPA206 is suitable for 6 applications: Industrial PLC Analog Input Modules, Precision Data Acquisition Front End, Transducer Signal Conditioning, Test and Measurement Instrumentation, Battery-Powered Precision Systems, Medical and Diagnostic Instrumentation.
Industrial PLC Analog Input Modules
The OPA206 fits PLC analog front ends because field wiring routinely exposes amplifier inputs to fault and miswired voltages; the integrated 40 V input overvoltage protection beyond the supplies eliminates external clamp diodes that otherwise add leakage and noise. At 240 uA supply current per channel, multi-channel input cards stay within thermal budgets, while 25 uV max offset and 0.5 uV/degC drift preserve accuracy across 4-20 mA and millivolt-level sensor conditioning in 8-SOIC footprint.
Recommended
Precision Data Acquisition Front End
In precision data acquisition, the OPA206 acts as a low-noise gain stage ahead of SAR or delta-sigma converters. Its 8 nV/rtHz noise keeps the amplifier from dominating system SNR, and the 500 pA max super-beta bias current permits use with high-impedance sensor sources without significant offset error. The rail-to-rail push-pull output drives ADC inputs on 5 V single supplies, while e-trim trimming ensures 25 uV max offset so gain calibration errors remain dominated by the converter, not the amplifier.
Recommended
Transducer Signal Conditioning
Bridge, thermocouple, and pressure transducers produce small differential signals that the OPA206 amplifies with minimal added error. The 25 uV maximum offset corresponds to microvolt-level sensing accuracy, and super-beta inputs at 500 pA max limit bridge loading error to well under 1 LSB in typical ratiometric designs. The 40 V input OVP is especially valuable for thermocouple and field-installed transducers, where miswiring and inductive spikes frequently exceed the supply rails and would destroy unprotected amplifiers.
Recommended
Test and Measurement Instrumentation
Bench instruments, DMM front ends, and sensor simulators benefit from the OPA206's combination of DC precision and robustness. The 0.5 uV/degC drift specification keeps calibration stable between recalibration cycles, and the input OVP protects the input stage when probes contact live circuits. The 8 nV/rtHz noise floor supports millivolt-range measurements, while the 240 uA quiescent current suits battery-operated handheld instruments where extended operating time is a selling point.
Recommended
Battery-Powered Precision Systems
At 240 uA per amplifier, the OPA206 extends battery life in portable analyzers, environmental monitors, and loop-powered 4-20 mA transmitters. The push-pull rail-to-rail output stage does not waste headroom in output-stage bias current, which matters in low-supply designs. The 4.5 V to 36 V total supply capability supports both 5 V battery rails and industrial 24 V loops, allowing one amplifier design to span portable and installed-product variants.
Recommended
Medical and Diagnostic Instrumentation
Patient-connected and laboratory diagnostic equipment requires quiet, accurate, and robust analog front ends. The OPA206's 8 nV/rtHz noise supports low-amplitude biosignal conditioning, while integrated 40 V input protection guards against defibrillation-adjacent transients and ESD events beyond the rail. Low 500 pA bias current suits high-impedance electrodes, and the SOIC-8 package eases compliance-focused layouts with short, symmetric input routing for minimized noise pickup.
Recommended
Recommended Products Summary
Engineering reference data for OPA206 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | OPA205 | OPA277 | OPA2206 | ADA4522-1 |
|---|---|---|---|---|---|
| Package | 8-SOIC | 8-SOIC - same | 8-SOIC - same | 8-SOIC (dual channel) | 8-SOIC - same footprint |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Analog Devices |
| Quiescent Current | 240 uA | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] |
| Voltage Noise | 8 nV/rtHz | Slightly better than OPA206 | [DATA_NEEDED] | 8 nV/rtHz (same family) | [DATA_NEEDED] |
| Input Offset Voltage (max) | 25 uV | [DATA_NEEDED] | [DATA_NEEDED] | 25 uV (same family) | [DATA_NEEDED] |
| Input Bias Current (max) | 500 pA | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] | [DATA_NEEDED] |
| Input Overvoltage Protection | Yes, up to 40 V beyond supplies | No | No | Yes, up to 40 V | No |
| Output Type | Push-Pull, Rail-to-Rail | Push-Pull, Rail-to-Rail | [DATA_NEEDED] | Push-Pull, Rail-to-Rail | [DATA_NEEDED] |
| Channel Count | 1 | 1 | 1 | 2 | 1 |
Key Differentiators
- Integrated 40 V input overvoltage protection (vs OPA205)
- Low power with low noise combined (vs OPA277)
- Dual-channel integration option (vs OPA2206)
Design Notes
Do not rely on the OPA206 input OVP as current limiting by itself: although inputs tolerate up to 40 V beyond the supplies, fault current through the protection structure must still be bounded. TI datasheet application sections recommend series input resistors sized so fault current stays within datasheet limits under worst-case sustained overvoltage. Also confirm the exact offset-voltage grade of the ordered suffix: datasheet revisions have shown 25 uV max as well as tighter 2 uV figures for specific grades.
Use short, symmetric traces to pins 2 and 3 for balanced input impedance, and place a 100 nF ceramic capacitor within 2 mm of each supply pin (V+ pin 7, V- pin 4) with a solid ground plane. Keep high-impedance input nets away from switching sources; the super-beta input's 500 pA max bias current makes leakage resistance errors visible above roughly 1 GOhm of source impedance, so clean PCB surfaces or guard rings help.
The OPA206's 240 uA quiescent current makes supply design trivial for battery systems, but rail-to-rail push-pull output current under load still dominates total consumption. For a 5 V single-supply design, budget output load current separately from quiescent current and verify the output can swing to the required ADC input range at that load, since rail-to-rail output swing degrades slightly with load current.
Compliance Information
RoHS compliance per TI product page. REACH, lead-free, and halogen-free status not found in provided data - verify on ti.com quality/Environmental pages.
