1 Features
• Integrated input overvoltage protection up to ±40 V
beyond supplies
• e-trim™ operational amplifier performance
– Low offset voltage: 25 μV (max)
– Low offset voltage drift: ±0.5 μV/°C (max)
• Super beta inputs
– Input bias current: 500 pA (max)
– Input current noise: 110 fA/√Hz
• Low noise
– 0.1-Hz to 10-Hz: 0.2 μVPP
– Voltage noise: 8 nV/√Hz
• AOL, CMRR, and PSRR: > 124 dB (full
temperature range)
• Gain bandwidth product: 3.6 MHz
• Low quiescent current: 240 μA (max)
• Slew rate: 4 V/μs
• Overload power limiter
• Rail-to-rail output
• EMI and RFI filtered inputs
• Wide supply: 4.5 V to 36 V
• Temperature range: –40°C to +125°C

2 Applications
• Analog input module
• Mixed module (AI,AO,DI,DO)
• Lab and field Instrumentation
• Source measurement unit (SMU)
• Digital multimeter (DMM)
• Train control and management
• String inverter
• Data acquisition (DAQ)

3 Description
The OPA206 and OPA2206 (OPAx206) are the next
generation of the industry-standard OPAx277 family
with the added feature of input overvoltage protection.
These precision, bipolar, e-trim™ op amps with superbeta
inputs use TI’s proprietary trimming technology
to achieve an input offset voltage of ±4 μV (typ) and
an input offset voltage drift of ±0.08 μV/°C (typ). The
input overvoltage protection activates when the input
signal exceeds the supply range and protects up to
40 V beyond either supply. This feature eliminates
the need for external circuitry to prevent amplifier
damage, thereby reducing size and costs.
The OPAx206 provide a speed-to-power ratio of
3.6 MHz for a mere 220 μA (typ). The devices also
achieve a low voltage noise density of only 8 nV/√Hz
at 1 kHz. The super-beta inputs of the OPAx206 have
a very low input bias current of 100 pA (typ) and a
current noise density of 110 fA/√Hz.
The high performance of the OPAx206 make these
devices 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
OPA205 and OPA2205 are related devices with the
same op amp core without the input protection, but
with improved broadband noise (7.2 nV/√Hz).