LTC1856 Linear Technology, LTC1856 Datasheet - Page 10

• Manufacturer Part Number: LTC1856
• Description: 100ksps ADC Converters
• Manufacturer: Linear Technology

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LTC1854/LTC1855/LTC1856
PI FU CTIO S
DGND (Pin 24): Digital Ground.
SDI (Pin 25): Serial Data Input.
SCK (Pin 26): Serial Data Clock.
FU CTIO AL BLOCK DIAGRA
10
U
U
COM
CH0
CH1
CH7
U
•
•
•
U
2
3
9
1
U
INPUT MUX
AGND1
14
MUXOUT
–
11
MUXOUT
10
+
ADC
+
W
12
13
ADC
–
MUX ADDRESS
REFERENCE
V
2.5V
REF
15
+
–
8k
RD (Pin 27): Read Input. This active low signal enables the
digital output pin SDO and enables the serial interface, SDI
and SCK are ignored when RD is high.
CONVST (Pin 28): Conversion Start. The ADC starts a
conversion on CONVST’s rising edge.
SAMPLING ADC
12-/14-/16-BIT
INTERNAL
1.6384X
4.096V
CLOCK
REFCOMP
16
DATA OUT
AGND2
AV
CONTROL
DD
19
17
LOGIC
SERIAL I/O
AGND3
DV
DD
20
18
DGND
24
28
25
22
26
27
21
23
18545
CONVST
SDI
BUSY
SCK
RD
OV
SDO
DD
BD
185456fa