FEATURES

BANDWIDTH: 20MHz

SLEW RATE: 30V/μs

FAST 16-BIT SETTLING TIME

LOW NOISE: 6nV/√Hz (typ) at 100kHz

EXCELLENT CMRR, PSRR, and AOL

RAIL-TO-RAIL OUTPUT

CM RANGE INCLUDES GND

THD+N: 0.0003% (typ) at 1kHz

QUIESCENT CURRENT: 5.5mA/ch (max)

SUPPLY VOLTAGE: 4V to 12V

SHUTDOWN MODE (OPAx726): 6μA/ch

APPLICATIONS

OPTICAL NETWORKING

TRANSIMPEDANCE AMPLIFIERS

INTEGRATORS

ACTIVE FILTERS

A/D CONVERTER BUFFERS

I/V CONVERTER FOR DACs

PORTABLE AUDIO

PROCESS CONTROL

TEST EQUIPMENT

DESCRIPTION

The OPA725 and OPA726 series op amps use a

state-of-the-art 12V analog CMOS process, and combine

outstanding ac performance with low bias current and

excellent CMRR, PSRR, and AOL. The 20MHz

Gain-Bandwidth (GBW) Product is achieved by using a

proprietary and patent-pending output stage design.

These characteristics allow excellent 16-bit settling times

for driving 16-bit Analog-to-Digital converters (ADCs).

Excellent ac characteristics, such as 20MHz GBW, 30V/μs

slew rate and 0.0003% THD+N make the OPA725 and

OPA726 well-suited for communication, high-end audio,

and active filter applications. With a bias current of less

than 200pA, they are well-suited for use as

transimpedance (I/V-conversion) amplifiers for monitoring

optical power in ONET applications.

The OPA725 and OPA726 op amps can be used in

single-supply applications from 4V up to 12V, or

dual-supply from ±2V to ±6V. The output swings to within

150mV of the rails, maximizing dynamic range. The

shutdown versions (OPAx726) reduce the quiescent

current to less than 6μA and feature a reference pin for

easy shutdown operation with standard CMOS logic in

dual-supply applications.

The OPA725 (single) is available in SOT23-5 and SO-8

packages, and the OPA2725 (dual) is available in MSOP-8

and SO-8 packages. The OPA726 (single with shutdown)

is available in MSOP-8 and SO-8. The OPA2726 (dual with

shutdown) is available in MSOP-10. All versions are

specified for operation from −40°C to +125°C.