Datasheet LTC1594, LTC1598 (Analog Devices) - 7

LTC1594/LTC1598
U U U PIN FUNCTIONS LTC1594 CH0 (Pin 1):
Analog Multiplexer Input.
DOUT (Pin 10):
Digital Data Output. The A/D conversion result is shifted out of this output.
CH1 (Pin 2):
Analog Multiplexer Input.
V CH2 (Pin 3):
Analog Multiplexer Input.
CC (Pin 11):
Power Supply Voltage. This pin provides power to the ADC. It must be bypassed directly to the
CH3 (Pin 4):
Analog Multiplexer Input. analog ground plane.
ADCIN (Pin 5):
ADC Input. This input is the positive analog
CLK (Pin 12):
Shift Clock. This clock synchronizes the input to the ADC. Connect this pin to MUXOUT for normal serial data transfer to both MUX and ADC. operation.
CSMUX (Pin 13):
MUX Chip Select Input. A logic high on
VREF (Pin 6):
Reference Input. The reference input defines this input allows the MUX to receive a channel address. A the span of the ADC. logic low enables the selected MUX channel and connects
COM (Pin 7):
Negative Analog Input. This input is the it to the MUXOUT pin for A/D conversion. For normal negative analog input to the ADC and must be free of noise operation, drive this pin in parallel with CSADC. with respect to GND.
DIN (Pin 14):
Digital Data Input. The multiplexer address
GND (Pin 8):
Analog Ground. GND should be tied directly is shifted into this input. to an analog ground plane.
MUXOUT (Pin 15):
MUX Output. This pin is the output of
CSADC (Pin 9):
ADC Chip Select Input. A logic high on this the multiplexer. Tie to ADCIN for normal operation. input powers down the ADC and three-states DOUT. A logic
VCC (Pin 16):
Power Supply Voltage. This pin should be low on this input enables the ADC to sample the selected tied to Pin 11. channel and start the conversion. For normal operation drive this pin in parallel with CSMUX.
LTC1598 CH5 (Pin 1):
Analog Multiplexer Input.
COM (Pin 8):
Negative Analog Input. This input is the negative analog input to the ADC and must be free of noise
CH6 (Pin 2):
Analog Multiplexer Input. with respect to GND.
CH7 (Pin 3):
Analog Multiplexer Input.
GND (Pin 9):
Analog Ground. GND should be tied directly
GND (Pin 4):
Analog Ground. GND should be tied directly to an analog ground plane. to an analog ground plane.
CSADC (Pin 10):
ADC Chip Select Input. A logic high on
CLK (Pin 5):
Shift Clock. This clock synchronizes the serial this input deselects and powers down the ADC and three- data transfer to both MUX and ADC. It also determines the states DOUT. A logic low on this input enables the ADC to conversion speed of the ADC. sample the selected channel and start the conversion. For
CSMUX (Pin 6):
MUX Chip Select Input. A logic high on normal operation drive this pin in parallel with CSMUX. this input allows the MUX to receive a channel address. A
DOUT (Pin 11):
Digital Data Output. The A/D conversion logic low enables the selected MUX channel and connects result is shifted out of this output. it to the MUXOUT pin for A/D conversion. For normal
NC (Pin 12):
No Connection. operation, drive this pin in parallel with CSADC.
NC (Pin 13):
No Connection.
DIN (Pin 7):
Digital Data Input. The multiplexer address is shifted into this input.
CLK (Pin 14):
Shift Clock. This input should be tied to Pin 5. 15948fb 7