低噪声24位模数转换器ISL26102, ISL26104

　　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）.