32bit ADC provides 148dB dynamic range

32bit ADC provides 148dB dynamic range

New Products |
By Peter Clarke

The LTC2500-32 provides two outputs: a 32-bit low noise digitally filtered output that achieves up to 148dB of dynamic range and a 32-bit 1Msps no-latency output comprising an over-range detection bit, a 24-bit representation of the input voltage difference, and a 7-bit representation of the common mode input voltage.

The low-noise density of LTC2500-32 produces 148dB of dynamic range at 61sps and 104dB at 1Msps. In addition to low noise, LTC2500-32 offers linearity of 0.5ppm typical and 2ppm guaranteed maximum INL, and negligibly low gain and offset drift over wide temperature ranges. In combination, these features enable state-of-the-art high precision measurements in noisy environments, such as in industrial automation applications. The integrated configurable digital filter offers seven filter types and 13 different down-sampling factors, providing users with a high level of flexibility to trade off bandwidth, filter response and noise performance for each application.

The LTC2500-32 is part of a family of ultrahigh precision SAR ADCs, which also includes the 32-bit LTC2508-32, providing digital filters optimized for data acquisition applications, and the 24-bit LTC2512-24, providing digital filters optimized for signal processing applications requiring a flat passband. The LTC2512-24 and LTC2508-32 provide a 14-bit no latency output for monitoring signal integrity and four downsampling factors for trading off bandwidth with dynamic range. The LTC2500-32 provides a broader range of filters and downsampling factors.

The LTC2500-32 is available today in commercial and industrial (–40°C to 85°C) temperature grades. Pricing begins at $35.95 each in 1,000-piece quantities. The DC2222A evaluation board for the LTC2500 SAR ADC family is available.

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