2 vcmo output, 0 digital input pins, 1 the adc clock (clk) input – Rainbow Electronics ADC10D040 User Manual

Page 25: 1 low sample rate considerations, 2 clock termination, 2 output bus select (os) pin, 3 offset correct (oc) pin, 4 output format (of) pin, 5 standby (stby) pin, 6 power down (pd) pin