LTC1609 LINER [Linear Technology], LTC1609 Datasheet - Page 11

• Manufacturer Part Number: LTC1609
• Description: 16-Bit, 200ksps, Serial ADC with Multiple Input Ranges
• Manufacturer: LINER [Linear Technology]

APPLICATIO S I FOR ATIO
Table 1b. Analog Input Range Connections for Figure 3b
INPUT RANGE
ANALOG INPUT
3.3V
10V
RANGE
5V
3.3V
10V
5V
U
U
V
IN
100
200
+
+
+
CONNECT R1
33.2k
33.2k
100
33.2k
VIA 200 TO
2.2 F
2.2 F
2.2 F
WITHOUT TRIM
V
V
Figure 3b. Offset/Gain Circuits for Bipolar Input Ranges
IN
IN
W
AGND
200
V
V
2.2 F
2.2 F
2.2 F
100
IN
IN
200
+
+
+
IN
R1
AGND1
R2
R3
CAP
REF
AGND2
R1
AGND1
R2
R3
CAP
REF
AGND2
R1
AGND1
R2
R3
CAP
REF
AGND2
U
LTC1609
LTC1609
LTC1609
IN
IN
IN
IN
IN
IN
IN
IN
IN
CONNECT R2
VIA 100 TO
AGND
V
V
IN
IN
IN
OFFSET
OFFSET
TRIM
TRIM
OFFSET
(ADJUST OFFSET FIRST AT 0V, THEN ADJUST GAIN)
TRIM
100
50k
50k
V
IN
5V
50k
5V
CONNECT R3
5V
200
CAP
CAP
CAP
33.2k
TRIM
100
33.2k
TO
GAIN
TRIM
TRIM
GAIN
GAIN
33.2k
50k
50k
50k
IN
5V
V
5V
5V
V
2.2 F
2.2 F
WITH TRIM
IN
IN
2.2 F
200
576k
576k
576k
2.2 F
2.2 F
2.2 F
100
+
+
+
200
+
+
+
IMPEDANCE
R1
AGND1
R2
R3
CAP
REF
AGND2
R1
AGND1
R2
R3
CAP
REF
AGND2
R1
AGND1
R2
R3
CAP
REF
AGND2
LTC1609
LTC1609
LTC1609
22.9k
13.3k
10.7k
IN
IN
IN
IN
IN
IN
IN
IN
IN
INPUT
LTC1609
1609 F03b
11
1609fa