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.