OPA2206ADGKR - ±40V OVP Dual Precision Op Amp | Texas Instruments
MPN: OPA2206ADGKR ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $3.42 | $3.42 |
| 10 | $3.07 | $30.70 |
| 100 | $2.74 | $274.00 |
| 500 | $2.46 | $1,230.00 |
| 1,000 | $2.18 | $2,180.00 |
| 2,500 | $1.92 | $4,800.00 |
OPA2206ADGKR Overview
An operational amplifier (op amp) is a DC-coupled high-gain electronic voltage amplifier with differential inputs and, typically, a single-ended output. Precision op amps form a distinct sub-category characterized by very low offset voltage, low offset drift, low bias current, and low noise, sitting hierarchically under amplifier ICs (integrated circuits) and analog signal-chain components. The OPA2206 is the dual-channel member of TI's OPAx206 family and represents the next-generation evolution of the long-standing OPAx277 series, retaining the OPAx277's low-noise, low-drift e-trim™ precision architecture while adding integrated ±40 V input OVP, eliminating the need for external input clamping in many industrial designs.
Key features include 4 µV (typ) / 25 µV (max) offset voltage achieved via TI's proprietary e-trim™ trimming technology, ±0.08 µV/°C (typ) offset drift, ±5 pA (typ) input bias current enabled by super-beta input transistors, integrated ±40 V input OVP that survives ESD and transients beyond the rails, and a wide supply range of 4.5 V to 36 V (single supply) or ±2.25 V to ±18 V (dual supply). The device is specified over the −40 °C to +125 °C industrial temperature range.
Architecturally, the OPA2206 uses a bipolar e-trim™ process with super-beta input stages, which decouple bias current from base current, dramatically reducing input bias current while preserving the low-noise and low-drift characteristics of a precision bipolar op amp. The e-trim™ trim step digitally calibrates each die's offset to <25 µV at room temperature and minimizes drift across temperature.
Typical applications include industrial process-control analog input modules, precision sensor signal conditioning (load cells, strain gauges, thermocouple front-ends), test and measurement equipment, battery monitoring systems, and any high-voltage-tolerant precision front-end where input transients or wiring faults could otherwise destroy a conventional op amp. The wide supply and ±40 V OVP make it a strong fit for 24-V industrial-bus sensor interfaces.
When designing with this device, place the input series resistors as close to the OPA2206 inputs as possible to maximize the effectiveness of the integrated OVP clamp structure and to limit fault current through the ESD diodes. The OPA2206 does not include rail-to-rail output; output swing is typically within ~1 V of each rail at 10 kΩ load.
This page synthesizes distributor pricing, drop-in alternatives in the VSSOP-8 footprint, and practical design notes that are not found in the manufacturer datasheet alone.
Drop-in alternatives for OPA2206ADGKR — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with OPA2206ADGKR (same form factor and footprint) — differing in MSL Level, Operating Temperature Range, Package.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
OPA2206ADGKT
✅ Drop-In📋 Reference alternative (not in catalog)
OPA2206AIDGKR
✅ Drop-In📋 Reference alternative (not in catalog)
OPA2192IDGKR
✅ Drop-In✓ In Stock
$1.78 / Unit
View Datasheet →OPA2197IDGKR
✅ Drop-In📋 Reference alternative (not in catalog)
OPA2206ADGKR Maximum Ratings & Electrical Characteristics
| Product Type | Precision Operational Amplifier |
| Number of Channels | 2 (Dual) |
| Input Overvoltage Protection | ±40 V beyond supplies |
| Input Offset Voltage (typical) | ±4 µV |
| Input Offset Voltage (maximum) | ±25 µV |
| Input Offset Voltage Drift (typical) | ±0.08 µV/°C |
| Input Bias Current (typical) | ±5 pA (super-beta inputs) |
| Supply Voltage Range (Single) | 4.5 V to 36 V |
| Supply Voltage Range (Dual) | ±2.25 V to ±18 V |
| Operating Temperature Range | -40 °C to +125 °C |
| Package | VSSOP-8 (DGK) 3.0 x 3.0 mm |
| Pin Count | 8 |
| Mounting Type | Surface Mount |
| MSL Level | 2 (260 °C, 1 year floor life) |
| RoHS Status | Compliant |
| Architecture | Bipolar e-trim™ with super-beta inputs |
OPA2206ADGKR Pin Configuration
| Pin 1 | OUT A — Output of channel A |
| Pin 2 | -IN A — Inverting input of channel A |
| Pin 3 | +IN A — Non-inverting input of channel A |
| Pin 4 | V- — Negative supply (or GND for single supply) |
| Pin 5 | +IN B — Non-inverting input of channel B |
| Pin 6 | -IN B — Inverting input of channel B |
| Pin 7 | OUT B — Output of channel B |
| Pin 8 | V+ — Positive supply |
Typical Applications
OPA2206ADGKR is suitable for 7 applications: Industrial 24-V Sensor Input Module, Precision Load Cell Signal Conditioning, Thermocouple and RTD Front-End, Battery Management Current Sensing, Test and Measurement Instrumentation, Medical Patient Monitoring Signal Chain, Photodiode Transimpedance Amplifier.
Industrial 24-V Sensor Input Module
The OPA2206ADGKR is purpose-built for 24-V industrial analog input modules where field wiring may carry transients or fault voltages far above the local 5-V or 3.3-V supply rails. The integrated ±40 V input OVP clamp structure allows direct connection to a 4-20 mA current-loop sense resistor, a thermocouple, or a strain-gauge bridge without external TVS or series protection diodes, reducing BOM and leakage paths. With ±4 µV typical offset and ±0.08 µV/°C drift, it preserves the small-signal accuracy required for 16-bit to 18-bit ADC front-ends operating from a single +5 V supply.
Recommended
Precision Load Cell Signal Conditioning
In load-cell and weigh-scale designs, the OPA2206ADGKR's ±5 pA typical input bias current and super-beta input stage avoid generating bias-current-induced offset errors that would otherwise corrupt the microvolt-level bridge output. Its 4 µV offset and 0.08 µV/°C drift maintain calibration accuracy across the industrial -40 °C to +125 °C range without periodic recalibration. The integrated ±40 V OVP protects the bridge-amplifier front end against electrostatic discharge during installation, an important reliability consideration for field-deployed scales.
Recommended
Thermocouple and RTD Front-End
Thermocouple and RTD conditioning demands an amplifier with very low offset, low drift, and low bias current to resolve microvolt-level signals over wide temperature excursions. The OPA2206ADGKR delivers ±4 µV typical offset, ±0.08 µV/°C drift, and ±5 pA bias current, providing enough headroom for type K, J, or T thermocouples without chopper-stabilization artifacts. Its ±40 V OVP is also valuable in process plants where common-mode faults and ground loops can drive inputs well beyond the supply rails.
Recommended
Battery Management Current Sensing
Battery-pack current-sense amplifiers must tolerate common-mode voltages that swing from ground to the full pack voltage during charge and discharge cycles, and survive load-dump transients on automotive 12-V or 24-V rails. The OPA2206ADGKR operates from 4.5 V to 36 V single supply and integrates ±40 V OVP at the inputs, enabling direct connection to a high-side current-sense shunt without external protection. Its e-trim™ precision keeps coulomb-counting accurate over the full state-of-charge range, critical for battery-fuel-gauge accuracy.
Recommended
Test and Measurement Instrumentation
Bench DMMs, data loggers, and laboratory instruments need precision front-end amplifiers that combine low noise, low drift, and tolerance to operator-induced overvoltages on the input terminals. The OPA2206ADGKR's 4 µV offset, ±0.08 µV/°C drift, and ±40 V OVP suit DMM input-protection networks and scanner-channel buffers. Its dual-channel configuration allows a single IC to handle differential and ground-reference paths in a three-terminal measurement front end.
Recommended
Medical Patient Monitoring Signal Chain
Patient monitors (ECG, EMG, SpO2) demand amplifiers with microvolt-level resolution, very low input bias current to avoid DC-offset artifacts on high-impedance electrodes, and tolerance to defibrillator pulses that can drive inputs to hundreds of volts briefly. The OPA2206ADGKR's ±5 pA super-beta bias current and ±40 V OVP provide the foundation for ECG front-end protection networks, while its low drift keeps baseline wander minimal across the patient's body temperature range.
Recommended
Photodiode Transimpedance Amplifier
Precision photodiode TIAs benefit from the OPA2206ADGKR's super-beta ±5 pA input bias current, which minimizes the DC error contribution from bias current flowing through the high-value feedback resistor. The low 4 µV offset and ±0.08 µV/°C drift maintain accurate dark-current subtraction over temperature, important for chemiluminescence, spectroscopy, and LIDAR receiver front-ends. The dual-channel package enables a differential photodiode receiver in a single IC footprint.
Recommended
Recommended Products Summary
Engineering reference data for OPA2206ADGKR — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | OPA2206ADGKT | OPA2206AIDGKR | OPA2192IDGKR | OPA2197IDGKR | OPA2277UA/2K5 |
|---|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | VSSOP-8 (DGK) | VSSOP-8 (DGK) - same | VSSOP-8 (DGK) - same | VSSOP-8 (DGK) - same | VSSOP-8 (DGK) - same | SOIC-8 (D) - different |
| Channels | 2 (Dual) | 2 (Dual) | 2 (Dual) | 2 (Dual) | 2 (Dual) | 2 (Dual) |
| Input Offset Voltage (typ) | ±4 µV | ±4 µV | ±4 µV | ±10 µV | ±25 µV | ±10 µV |
| Input OVP | ±40 V integrated | ±40 V integrated | ±40 V integrated | None (external required) | None (external required) | None (external required) |
| Input Bias Current (typ) | ±5 pA (super-beta) | ±5 pA | ±5 pA | ±5 pA | ±5 pA | ±1 nA |
| Supply Voltage Range | 4.5 V to 36 V | 4.5 V to 36 V | 4.5 V to 36 V | 4.5 V to 36 V | 4.5 V to 36 V | 5 V to 36 V |
Key Differentiators
- Integrated ±40 V input overvoltage protection eliminates external clamping BOM (vs OPA2277UA/2K5)
- Super-beta input stage reduces bias current ~10× versus OPAx277 family (vs OPA2277UA/2K5)
- Lower input offset voltage (typ) versus OPAx192 alternatives (vs OPA2192IDGKR)
Design Notes
Place input series resistors as close to the OPA2206 inputs (pins 2, 3, 5, 6) as physically possible to maximize the effectiveness of the integrated ±40 V OVP clamp structure. During a transient event, the input series resistance drops the bulk of the fault voltage; keeping the trace between the resistor and the IC input short minimizes parasitic inductance that would otherwise allow the input pin to overshoot the clamp voltage.
The OPA2206 output is NOT rail-to-rail; output swing is typically within ~1 V of each rail at 10 kΩ load. Do not assume rail-to-rail output swing when designing single-supply ADC driver circuits that require the output to reach the positive rail. For rail-to-rail output, consider OPA2333 or OPA2344 instead, noting they lack the integrated ±40 V OVP.
Use a guard trace or guard ring around each input pin to minimize leakage currents that would otherwise corrupt the precision offset and bias specifications of the OPA2206. Guard traces must be driven to the same potential as the input pin (typically the reference or common-mode voltage) and isolated from high-impedance input traces on both sides.
Estimated: at ±18 V dual supply and 1 mA quiescent current per channel, total supply current is ~2 mA. For battery-powered precision applications, consider the OPA2333 (1.65 V to 5.5 V supply) or OPA2330 (zero-drift CMOS) for sub-µA quiescent current, accepting that neither has the ±40 V OVP.
Compliance Information
RoHS and REACH compliant per TI product page. Standard catalog part is NOT AEC-Q100 qualified; for automotive-grade precision op amp, see OPA2206-Q1 or OPA4277-Q1 families. MSL Level 2 with 1-year floor life at 260 °C peak reflow.
