1 Features

• High output current: ±150-mA typical ISC at 5.5 V

• Fast enable and disable response: 1-μs typical

• Wide operational supply voltage: 1.5 V to 5.5 V

• Low input offset voltage: ±150-μV typical

• Fail-safe inputs: No diode from inputs to V+

• Optimized quiescent current: 165-μA/ch typical

• Rail-to-rail input and output

• Gain bandwidth product: 3-MHz typical at 5.5 V

• Thermal noise floor: 15-nV/√Hz typical

• Unity-gain stable

• No sustained oscillations up to 250 pF of load

capacitance

• Internal RFI and EMI filtered input pins

• Wide operating temperature range: –40°C to

125°C

2 Applications

• Optical modules

• Reference buffers, guard amplifiers

• Microphone pre-amplifiers

• Lighting and LED Drivers

• 4-20 mA loop drivers

• Programmable current source

• Low side current sensing circuitry

3 Description

The OPAx310 family of op amps includes single

(OPA310), dual (OPA2310), and quad-channel

(OPA4310), low-voltage (1.5 V to 5.5 V), high output

current operational amplifiers (op amps) with rail-torail

input and output swing capabilities. The OPAx310

also features a very fast shutdown response and has

a typical enable/disable time of just 1μs that allows

for power savings when the application involves duty

cycling the amplifier signal chain. OPAx310 has a

robust ESD performance with fail safe input ESD

structure where there are no diodes connected from

inputs to the positive power supply rail.

OPAx310 is offered in power pad, standard, small

size package variants and has an internal current limit

protection, thermal shutdown protection that enables

additional robustness when operating with high output

current. OPAx310 can swing very close to the rails

and has a short circuit current of 75-mA minimum

across temperature at 5.5-V power supply. Additional

output current capability can easily be achieved by

connecting multiple op amps in parallel. OPAx310

devices are an excellent choice for LED driver, LCD

driver, Laser driver, TEC driver applications and can

also be used as a reference buffer, guard amplifier, or

as a discrete LDO.

The robust design of the OPAx310 family simplifies

circuit design. These op amps feature an integrated

RFI and EMI rejection filter with no-phase reversal in

input overdrive conditions. These device also deliver

excellent AC performance with a gain bandwidth

of 3 MHz and more than 100 pF of cap load

drive, enabling designers to achieve both improved

performance and a lower power consumption.