1 Features
• 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 to 10-Hz: 0.2 μVPP
– Voltage noise: 7.2 nV/√Hz
• AOL, CMRR, and PSRR: > 126 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
• Available in high grade (OPAx205) and standard
grade (OPAx205A)

2 Applications
• Flow transmitter
• String inverter
• Data acquisition (DAQ)
• Source measurement unit (SMU)
• Lab and field instrumentation
• Battery test
• Analog input module
• Pressure transmitter

3 Description
The OPA205 and OPA2205 (OPAx205) are the
next generation of the industry-standard OPAx277
family. These devices are precision, bipolar e-trim™
operational amplifiers with super-beta inputs. The
devices use TI's proprietary trimming technology to
achieve an input offset voltage of ±2 μV (typical) and
an input offset voltage drift of ±0.04 μV (typical).
Designed on a bipolar process, the OPAx205 provide
3.6‑MHz gain bandwidth for a mere 220 μA of
quiescent current. The devices also achieve a low
voltage noise density of only 7.2 nV/√Hz at 1 kHz.
Thanks to super-beta inputs, the OPAx205 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 OPAx205 makes
these devices an excellent choice for systems
requiring high precision and low power consumption,
such as flow and pressure transmitters, portable
data acquisition (DAQ) systems, and high-density
source measurement units (SMU). The OPA206 and
OPA2206 are related devices with the same op
amp core, but with the additional feature of input
overvoltage protection.