LTC1594/LTC1598 UUUPIN FUNCTIONSVCC (Pin 15): Power Supply Voltage. This pin provides VCC (Pin 19): Power Supply Voltage. This pin should be power to the A/D Converter. It must be bypassed directly tied to Pin 15. to the analog ground plane. CH0 (Pin 20): Analog Multiplexer Input. VREF (Pin 16): Reference Input. The reference input de- CH1 (Pin 21): Analog Multiplexer Input. fines the span of the ADC. CH2 (Pin 22): Analog Multiplexer Input. ADCIN (Pin 17): ADC Input. This input is the positive analog input to the ADC. Connect this pin to MUXOUT for CH3 (Pin 23): Analog Multiplexer Input. normal operation. CH4 (Pin 24): Analog Multiplexer Input. MUXOUT (Pin 18): MUX Output. This pin is the output of the multiplexer. Tie to ADCIN for normal operation. WBLOCK DIAGRA SLTC1594LTC1598 15 5 6 16 18 17 16 15, 19 MUXOUT ADCIN V MUXOUT ADCIN V REF VCC REF VCC 9 20 CH0 CSADC 1 CH0 13 21 CH1 10 CSMUX CSADC 2 CH1 12-BIT 12 22 CH2 6 4-CHANNEL + CLK CSMUX 3 CH2 SAMPLING MUX 14 23 CH3 ADC DIN 8-CHANNEL 12-BIT 5, 14 4 CH3 10 + CLK 24 CH4 MUX SAMPLING 7 – DOUT ADC DIN 7 COM 1 CH5 11 GND LTC1594 – DOUT 2 CH6 12 NC 8 3 CH7 13 NC 8 COM GND LTC1598 1594/98 BD 4, 9 TEST CIRCUITSLoad Circuit for tdDO, tr and tfVoltage Waveforms for DOUT Rise and Fall Times, tr, tf 1.4V VOH DOUT VOL 3k DOUT TEST POINT tr tf 1594/98 TC02 100pF 1594/98 TC01 15948fb 8