ISL28278

Features:

• Low power 120A typical supply current (ISL28278)
• 225V max offset voltage
• 30pA max input bias current
• 300kHz typical gain-bandwidth product
• 105dB typical PSRR
• 100dB typical CMRR
• Single supply operation down to 2.4V
• Input is capable of swinging above V+ and below V- (ground sensing)
• Rail-to-rail input and output (RRIO)
• Enable Pin (ISL28278 only)
• Pb-free plus anneal available (RoHS compliant)




Application

• Battery- or solar-powered systems
• 4mA to 25mA current loops
• Handheld consumer products
• Medical devices
• Thermocouple amplifiers
• Photodiode pre-amps
• pH probe amplifiers




Pinout






Specifications

Supply Voltage, V- to V+ . . . . . . . . . . . . . . . . . . . . . . .. . . . . 5.5V
Supply Turn On Voltage Slew Rate . . . . . . . . . . . . . . . . . . . 1V/s
Differential Input Current . . . . . . . . . . . . . . . . . . . . . . . . . . . 5mA
Differential Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.5V
Input Voltage . . . . . . . . . . . . . . . . . . . . . . V- - 0.5V to V+ + 0.5V
ESD Tolerance
Human Body Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3kV
Machine Model. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .300V

CAUTION: Do not operate at or near the maximum ratings listed for extended periods of time. Exposure to such conditions may adversely impact product reliability and result in failures not covered by warranty.

Description

The ISL28278 and ISL28478 are dual and quad channel micropower operational amplifiers optimized for single supply operation over the 2.4V to 5.5V range. They can be operated from one lithium cell or two Ni-Cd batteries. For equivalent performance in a single channel op amp reference EL8178. These devices feature an Input Range Enhancement Circuit (IREC) which enables them to maintain CMRR performance for input voltages 10% above the positive supply rail and to 100mV below the negative supply. The output operation is rail-to-rail. The ISL28278 and ISL28478 draw minimal supply current while meeting excellent DC-accuracy, AC-performance, noise and output drive specifications. The ISL28278 contains a power down enable pin that reduces the power supply current to typically 4A in the disabled state.