1 Features
• Integrated input overvoltage protection up to ±40 V
beyond supplies
• e-trim™ operational amplifier performance
– Low offset voltage: 50 μV (max)
– Low offset voltage drift: ±0.5 μV/°C (max)
• Super beta inputs
– Input bias current: 0.5 nA (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 additional 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 ±8 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 offers
protection up to 40 V beyond either supply. This
feature eliminates the need for external circuitry to
prevent amplifier damage.
Designed on a bipolar process, 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. Thanks to superbeta
inputs, 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).