SLAA717A August   2016  – March 2022 ADS1601 , ADS1602 , ADS1605 , ADS1606 , ADS1625 , ADS1626

 

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Introduction

The ADS1605, ADS1606 and ADS1625, ADS1626 can operate from an internal or external voltage reference. In either case, the reference voltage VREF is set by the differential voltage between VREFN and VREFP: VREF = (VREFP – VREFN). VREFP and VREFN each use two pins, which should be shorted together. VMID equals approximately 2.5 V and is used by the modulator. VCAP connects to an internal node and must also be bypassed with an external capacitor. For the best analog performance, it is recommended that an external reference voltage (VREF) of 3 V be used.