ISL26104

Low-Noise 24-bit Delta Sigma ADC

Product Status: Mass Production

OVERVIEW

The ISL26102 and ISL26104 provide a low-noise programmable gain amplifier along with a 24-bit Delta-Sigma Analog-to-Digital Converter with two channel (ISL26102) or four channel (ISL26104) differential, multiplexed inputs. The devices feature exceptional noise performance for conversion rates ranging from 2.5Sps to 4kSps.

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 FEATURES

  • 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

PARAMETRICS

Parameters
ISL26104
Basic Information
Production Status
Mass Production
# of Devices/ Channels
4
Resolution Bits
24
Max Conversion Rate (kSPS)
4
INL (%FS)
2.0E-4
Noise (μVrms)
.007
Power Consumption (mW)
33.75
Analog Supply Voltage Min (V)
4.75
Analog Supply Voltage Max (V)
5.25
Digital Supply Voltage Min (V)
2.7 V
Digital Supply Voltage Max (V)
5.25 V
Qualification Level
Standard
Digital Supply Voltage V
2.7 to 5.25
Analog Supply Voltage V
4.75 to 5.25
Can Sample
YES
Temperature Range
-40 to +105

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