Datasheet

8
LTC1594/LTC1598
15948fb
PIN FUNCTIONS
UUU
V
CC
(Pin 15): Power Supply Voltage. This pin provides
power to the A/D Converter. It must be bypassed directly
to the analog ground plane.
V
REF
(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.
V
CC
(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 D
OUT
Rise and Fall Times, t
r
, t
f
Load Circuit for t
dDO
, t
r
and t
f
D
OUT
1.4V
3k
100pF
TEST POINT
1594/98 TC01
D
OUT
V
OL
V
OH
t
r
t
f
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
D
IN
D
OUT
12
13
NC
NC
12-BIT
SAMPLING
ADC
ADCINMUXOUT
18 17 16 15, 19
V
REF
V
CC
CH0
CH1
CH2
CH3
1
2
3
4
+
–
4-CHANNEL
MUX
7 COM
GND
8
9
13
12
14
10
CSADC
CSMUX
CLK
D
IN
D
OUT
12-BIT
SAMPLING
ADC
ADCINMUXOUT
15 5 6 16
V
REF
V
CC
LTC1594
LTC1598
BLOCK DIAGRA S
W
LTC1594
LTC1598