GENERAL DESCRIPTION
The AD8426 is a dual-channel, low cost, wide supply range instrumentation amplifier that requires only one external resistor to set any gain from 1 to 1000.
The AD8426 is designed to work with a variety of signal voltages. A wide input range and rail-to-rail output allow the signal to make full use of the supply rails. Because the input range can also go below the negative supply, small signals near ground can be amplified without requiring dual supplies. The AD8426 operates on supplies ranging from ±1.35 V to ±18 V for dual supplies and 2.2 V to 36 V for a single supply.
The robust AD8426 inputs are designed to connect to real world sensors. In addition to its wide operating range, the AD8426 can handle voltages beyond the rails. For example, with a ±5 V supply, the part is guaranteed to withstand ±35 V at the input with no damage. Minimum and maximum input bias currents are specified to facilitate open-wire detection.

FEATURES
   2 channels in a small, 4 mm × 4 mm LFCSP
   LFCSP package has no metal pad
      More routing room
      No current leakage to pad
   Gain set with 1 external resistor
      Gain range: 1 to 1000
   Input voltage goes below ground
   Inputs protected beyond supplies
   Very wide power supply range
      Single supply: 2.2 V to 36 V
      Dual supply: ±1.35 V to ±18 V
   Bandwidth (G = 1): 1 MHz
   CMRR (G = 1): 80 dB minimum
   Input noise: 24 nV/√Hz
   Typical supply current (per amplifier): 350 μA
   Specified temperature range: −40°C to +125°C
  
APPLICATIONS
   Industrial process controls
   Bridge amplifiers
   Medical instrumentation
   Portable data acquisition
   Multichannel systems