LTC2500-32

LTC2500-32 32-Bit Oversampling ADC with Configurable Digital Filter FEATURES nn ±0.5ppm INL (Typ) nn 104dB SNR (Typ) at 1Msps nn 148dB Dynamic Range (Typ) at 61sps nn Guaranteed 32-Bit No Missing Codes nn Configurable Digital Filter with Synchronization nn Relaxed Anti-Aliasing Filter Requirements nn Dual Output 32-Bit SAR ADC nn 32-Bit Digitally Filtered Low Noise Output nn 24-Bit Differential + 7-Bit Common Mode 1Msps Output with Overrange Detection nn Wide Input Common Mode Range nn Guaranteed Operation to 85°C nn 1.8V to 5V SPI-Compatible Serial I/O nn Low Power: 24mW at 1Msps nn 24-Lead 7mm × 4mm DFN Packages APPLICATIONS nn Seismology nn Energy Exploration nn Automatic Test Equipment nn High Accuracy Instrumentation DESCRIPTION The LTC®2500-32 is a low noise, low power, high performance 32-bit ADC with an integrated configurable digital filter. Operating from a single 2.5V supply, the LTC2500-32 features a fully differential input range up to ±VREF, with VREF ranging from 2.5V to 5.1V. The LTC2500-32 supports a wide common mode range from 0V to VREF simplifying analog signal conditioning requirements. The LTC2500-32 simultaneously provides two output codes: (1) a 32-bit digitally filtered high precision low noise code, and (2) a 32-bit no latency composite code. The configurable digital filter reduces measurement noise by lowpass filtering and downsampling the stream of data from the SAR ADC core, giving the 32-bit filtered output code. The 32-bit composite code consi...