Imitate ADS 7052 Power Supply Decoupling C 1

Imitate ADS 7052

Power Supply Decoupling • C 1 ( 10 μF ) for filtering power supply’s noise and ripple ( ~ 30 m. V ) – Noise back to system’s local ground ( VSS ) with shortest path • LDO ( TPS 79901 ) and Band gap reference ( REF 1933 ) suppress ripple for ADC’s reference * Power supply : E 3631 A

Operate Voltage Select ( 1/2 ) • Select the operating voltage for ADC ( 3. 30 V or 1. 65 V ) – Test case : • Case 1: AVDD_ADC = 3. 30 V, DVDD_ADC = 3. 30 V • Case 2: AVDD_ADC = 3. 30 V, DVDD_ADC = 1. 65 V • Case 3: AVDD_ADC = 1. 65 V, DVDD_ADC = 1. 65 V – Select method • Jump select ( without level shifter ) only test case 1 • Auto control MCU: 3. 3 V

Operate Voltage Select ( 2/2 ) • Select the operating voltage for ADC ( 3. 30 V or 1. 65 V ) – Test case : • Case 1: AVDD_ADC = 3. 30 V, DVDD_ADC = 3. 30 V • Case 2: AVDD_ADC = 3. 30 V, DVDD_ADC = 1. 65 V • Case 3: AVDD_ADC = 1. 65 V, DVDD_ADC = 1. 65 V – Select method • Jump select ( without level shifter ) • Auto control MCU: 3. 3 V

Input Circuit • Both DC and AC test are expected to consider – AC-Test source • MDO 3034 ( single channel sin wave ) – DC-Test source • DAC 91001 ( 18 bit un-buffered DAC )…. .

SPI Interface • Logic Analyzer • MCU fetch • Could PHI Board help me to fetch data ? ( EEPROM ID? ? )