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).