Low-Noise 24-bit Delta Sigma ADC
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.
Features
⢠Programmable gain amplifier with gains of 1 to 128
⢠Low noise: 7nV/âHz @ 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 monitors and controls
⢠Load safety systems
⢠Industrial process control
⢠Pressure sensors
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