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