1 Features

• e-trim™ operational amplifier performance

– Low offset voltage: 25 μV (max),

15 μV (max, high grade)

– Low offset voltage drift: ±0.5 μV/°C (max),

±0.2 μV/°C (max, high grade)

• Super beta inputs

– Input bias current: 500 pA (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 standard grade (OPAx205A) and

high grade (OPA2205, preview)

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, OPA2205, and OPA4205 (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 ±4 μV (typical)

and ±2 μV (typical, high grade), and an input offset

voltage drift of ±0.08 μV (typical) and ±0.04 μV

(typical, high grade).

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.

The super-beta inputs of the OPAx205 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 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 of ±40 V above the supplies.