Datasheet

EVAL-AD7352/AD7356/AD7357
Rev. 0 | Page 4 of 16
Link No. Function
S13
This link selects the source of the common-mode input for the AD8138 op amp that drives ADC A on the AD7352, AD7356, and
AD7357. If this link is closed, the common mode is supplied from the buffered output of the internal reference.
S14
This link selects the source of the common-mode input for the AD8138 op amp that drives ADC B on the AD7352, AD7356, and
AD7357. If this link is closed, the common mode is supplied from an external source via EXT COM B Connector J4.
S16
This link selects the source of the common-mode input for the AD8138 op amp that drives ADC B on the AD7352, AD7356, and
AD7357. If this link is closed, the common mode is supplied from the buffered output of the internal reference.
S18 If a bipolar analog input source is used, this link should be open. If a unipolar analog input source is used, this link should be closed.
S19 This link selects whether the source for ADC A is terminated through a 49.9 Ω resistor. If this link is closed, the source is terminated.
S20 This link allows the application of an external reference to ADC A through EXT REF A Connector J5.
S21 This link, when closed, applies a 2.5 V output from the ADR421 reference to ADC A.
S22 This link allows the application of an external reference to ADC B through EXT REF B Connector J6.
S23 This link, when closed, applies a 2.5 V output from the ADR421 reference to ADC A.
S24 This link selects whether the source for ADC B is terminated through a 49.9 Ω resistor. If this link is closed, the source is terminated.