LTC2420 UUWFU CTIO AL BLOCK DIAGRA INTERNAL VCC OSCILLATOR GND AUTOCALIBRATION F AND CONTROL O (INT/EXT) VIN ∫ ∫ ∫ SDO SERIAL ∑ ADC SCK INTERFACE CS VREF DECIMATING FIR DAC 2420 FD TEST CIRCUITS VCC 3.4k SDO SDO 3.4k CLOAD = 20pF CLOAD = 20pF Hi-Z TO VOH Hi-Z TO VOL VOL TO VOH VOH TO VOL V 2420 TC01 OH TO Hi-Z V 2420 TC02 OL TO Hi-Z 9