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, OPA2206, and OPA4206 (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 super-beta inputs use TI’s
proprietary trimming technology to achieve an input
offset voltage of ±4 μV (typical) and an input offset
voltage drift of ±0.08 μV/°C (typical). 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 (typical). These 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
(typical) 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).