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).