OPA2206

• Integrated input overvoltage protection up to ±40 V beyond supplies
• e-trim™ operational amplifier performance
  • Low offset voltage: 15 µV (max)
  • Low offset voltage drift: ±0.2 µV/°C (max)
• Super beta inputs
  • Input bias current: 0.4 nA (max)
  • Input current noise: 110 fA/√Hz
• Low noise
  • 0.1-Hz to 10-Hz: 0.2 µV_PP
  • Voltage noise: 8 nV/√Hz
• A_OL, CMRR, and PSRR: > 126 dB (full temperature range)
• Gain bandwidth product: 3.6 MHz
• Low quiescent current: 220 µA (max)
• Slew rate: 4 V/µs
• Overload power limiter
• Rail-to-rail output
• EMI/RFI filtered inputs
• Wide supply: 4.5 V to 36 V
• Temperature range: –40°C to +125°C
• Available in high grade (OPA2206) and standard grade (OPA2206A)

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The OPA2206 is the next generation of the industry-standard OPAx277 family with the additional feature of input overvoltage protection. The device is a precision bipolar, e-trim operational amplifier with super beta inputs. The device uses TI’s proprietary trimming technology to achieve an impressive input offset voltage of ±2 µV (typ) and an input offset voltage drift of ±0.04 µV/°C (typ). The input overvoltage protection activates when the input signal exceeds the supply range and offers protection up to 40 V beyond either supply. This feature eliminates the need for external cumbersome circuitry to prevent the amplifier from damages.

Designed on a bipolar process, the OPA2206 provides a superb speed-to-power ratio of 3.6 MHz for a mere 220 µA. The device also achieves a low voltage noise density of only 8 nV/√Hz at 1 kHz. Thanks to super-beta inputs, the OPA2206 has a very low input bias current of 100 pA (typ) and a current noise density of 110 fA/√Hz.

The high performance of the OPA2206 makes this device an excellent choice for systems requiring high precision and low power consumption, such as high-density analog input modules in programmable logic controllers, field and portable instrumentation systems, and source measurement units. The OPA2205 is a related product with the same op amp core, without the input protection but with improved broadband noise (7.2 nV/√Hz).