Features: • 150V max offset voltage (ISL28270, ISL28470)
• 600V max offset voltage (ISL28273)
• 2.5nA max input bias current (ISL28270, ISL28470)
• 110dB CMRR
• 0.7V/ offset voltage temperature coefficient
• 240kHz -3dB bandwidth (G = 100) ISL28270, ISL28470
• 230kHz -3dB bandwidth (G = 10) ISL28273
• Single supply operation
• Rail-to-rail input and output (RRIO)
• Pb-free plus anneal available (RoHS compliant)Application• Battery or solar-powered systems
• Strain gauge
• Sensor signal conditioning
• Medical devices
• Industrial instrumentationsPinout
SpecificationsSupply Voltage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . 5.5V
Supply Turn On Voltage Slew Rate . . . . . . . . . . . . . . . . . . . . . 1V/s
Input Current (IN, FB) ISL28270, ISL28470 . . . . . . . . . . . . . . . 5mA
Differential Input Voltage (IN, FB) ISL28270, ISL28470 . . . . . . 0.5V
Input Current (IN, FB) ISL28273 . . . . . . . . . . . . . . . . . . . . . . . 5mA
Differential Input (IN, FB) Voltage ISL28273 . . . . . . . . . . . . . . 1.0V
Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . V- - 0.5V to V+ + 0.5V
ESD Rating
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 andresult in failures not covered by warranty.
DescriptionThe ISL28270 and ISL28273 are dual channel micropower instrumentation amplifiers (in-amps) and the ISL28470 is aquad channel in-amp optimized for single supply operation over the +2.4V to +5.5V range.
All three devices feature an Input Range EnhancementCircuit (IREC) which maintains CMRR performance for inputvoltages equal to the positive supply and down to 50mV above the negative supply rail. The input signal is capable of swinging above the positive supply rail and to 10mV above the negative supply with only a slight degradation of the CMRR performance. The output operation is rail-to-rail.
The ISL28273 is compensated for a minimum gain of 10 or more. For higher gain applications, the ISL28270 andISL28470 are compensated for a minimum gain of 100. Thein-amps have bipolar input devices for best offset andexcellent 1/f noise performance. The amplifiers can beoperated from one lithium cell or two Ni-Cd batteries.
ISL28273 Data Sheet
