Intersil – ISL26102/4: Leading Edge, Low-Noise 24-Bit ADC

The on-chip low-noise programmable-gain amplifier provides gains ranging from 1 to 128, which supports ±19.5mVFS from a 5V reference. The high input impedance allows direct connection of sensors such as load cell bridges to ensure the specified measurement accuracy without additional circuitry.

The Delta-Sigma ADC features a 3rd-order modulator providing up to 21.5 bit noise-free performance (10Sps), with user-selectable word rates. The converter can be operated from an external clock source, an external crystal (typically 4.9152MHz), or the on-chip oscillator.

The ISL26102 and ISL26104 offer a simple-to-use serial interface. The ISL26102 and ISL26104 are available in a Thin Shrink Small Outline Package (TSSOP).

The devices are specified for operation over the automotive temperature range (-40°C to +105°C).

Key Feature:

  • Programmable gain amplifier with gains of 1 to 128
  • Low noise: 7nV/√Hz @ PGA = 128
  • Linearity error: 0.0002% FS
  • Output word rates up to 4kSps
  • Low-side switch for load cell power management
  • +5V analog and +2.7V to +5V digital supplies
  • ISL26102 in 24 Ld TSSOP
  • ISL26104 in 28 Ld TSSOP
  • ESD 7.5kV – HBM

Applications:

  • Weigh Scales
  • Temperature Monitor and Controls
  • Load Safety Systems
  • Diagnostic ECG
  • Pressure Sensors
See also

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