DC847A

DC847A is demonstration circuit for the LTC2446 24bit high speed 8-channel delta sigma ADCs with selectable multiple reference inputs. Key DC specifications of LTC2446 include 5ppm INL, 5μV offset, 10ppm full-scale error and 20nV/°C offset drift. In the 6.9Hz/200nVRMS mode, input normal mode rejection of 50Hz and 60Hz noise is better than 87dB. The accuracy (offset, full-scale, linearity, drift) and power dissipation are independent of the speed selected. The LTC2446 also has four reference inputs dedicated to the four differential input channels and corresponding pairs of single-ended input channels. DC847A is designed to allow easy evaluation of the LTC2446 and may be connected directly to the target application’s analogue signals while using the DC590 USB serial controller board and supplied software to measure performance. The exposed ground planes allow proper grounding to prototype circuitry.

• Member of QuikEval™ family of demonstration boards