Achieves dynamic range of up to 148 dB
32-bit 1Msps no-latency output

Analog Devices announced the LTC2500-32, an ultra-high precision 32-bit successive approximation register (SAR) analog-to-digital converter (ADC).

The LTC2500-32 represents a new approach for precision measurement applications. It combines the high accuracy and proprietary SAR ADC architecture of Linear Technology with flexible integrated digital filters to optimize system signal bandwidth and simplify analog anti-aliasing filter requirements.

The LTC2500-32 simultaneously provides (1) a 32-bit low-noise digitally filtered output (achieving up to 148dB of dynamic range) and (2) a 32-bit 1Msps no-latency output (consisting of an overrange detection bit, 24 bits representing the input voltage difference, and 7 bits representing the common-mode input voltage).



The zero-latency output is inherently perfectly matched to the digitally filtered output, avoiding mismatches and drifts commonly encountered in applications that require an additional high-speed ADC to monitor signal integrity in parallel with a precision ADC.

The LTC2500-32 has very low noise density, providing a dynamic range of 148dB at 61sps and 104dB at 1Msps. In addition to low noise, the LTC2500-32 features excellent linearity with 0.5ppm (typical) and 2ppm guaranteed maximum INL, as well as low gain and offset performance over a wide temperature range.

The LTC2500-32 is part of a family of ultra-high precision SAR ADCs, which also includes the 32-bit LTC2508-32, providing digital filters for data acquisition applications. The LTC2512-24 and LTC2508-32 also provide 14-bit no-latency outputs for monitoring signal integrity and four downsampling values, allowing users to trade off bandwidth and dynamic range. The LTC2500-32 offers a wider range of filters and downsampling values.