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/√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 monitors and controls
• Load safety systems
• Industrial process control
• Pressure sensors