OPAx310 High Output Current, Fast Shutdown, Low Voltage (1.5 V–5.5 V), RRIO,

3-MHz Operational Amplifier

1 Features

• 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-to-

rail 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.

Device Information

PART NUMBER(1)

PACKAGE(2)

BODY SIZE (NOM)

OPA310

SOT-23 (5)

1.60 mm × 2.90 mm

SC70 (5)

1.25 mm × 2.00 mm

X2SON (5)

0.80 mm × 0.80 mm

SOT-5X3 (5)

1.20 mm × 1.60 mm

OPA310S

SOT-23 (6)

1.60 mm × 2.90 mm

SC70 (6)

1.25 mm × 2.00 mm

OPA2310

SOIC (8)

3.91 mm × 4.90 mm

SOT-23 (8)

1.60 mm × 2.90 mm

WSON (8)

2.00 mm × 2.00 mm

VSSOP (8)

3.00 mm × 3.00 mm

TSSOP (8)

3.00 mm × 4.40 mm

OPA2310S

X2QFN (10)

1.50 mm × 2.00 mm

HVSSOP (10)

3.00 mm × 3.00 mm

OPA4310

SOIC (14)

8.65 mm × 3.91 mm

TSSOP (14)

4.40 mm × 5.00 mm

X2QFN (14)

2.00 mm × 2.00 mm

OPA4310S

WQFN (16)

3.00 mm × 3.00 mm

SOT-23 (16)

4.20 mm × 2.00 mm

(1)

For all available packages, see the orderable addendum at

the end of the data sheet.

(2)

Packages in the table are for preview only.

+

–

+

–

GND

DAC

OPA2310

MCU

APD / LED / EML

GND

APD / LED / EML Biasing with Current Sense

OPA310, OPA2310, OPA4310

SBOSAA1 – APRIL 2022

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. ADVANCE INFORMATION for preproduction products; subject to change

without notice.