LTC1609 LINER [Linear Technology], LTC1609 Datasheet - Page 10

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

APPLICATIO S I FOR ATIO
LTC1609
10
Table 1a. Analog Input Range Connections for Figure 3a
INPUT RANGE
0V TO 10V
0V TO 5V
0V TO 4V
ANALOG INPUT
0V to 10V
0V to 5V
0V to 4V
RANGE
U
U
V
IN
200
200
+
+
+
33.2k
33.2k
CONNECT R1
VIA 200 TO
2.2 F
2.2 F
2.2 F
WITHOUT TRIM
V
Figure 3a. Offset/Gain Circuits for Unipolar Input Ranges
W
IN
AGND
AGND
V
2.2 F
2.2 F
2.2 F
100
200
100
33.2k
IN
100
V
IN
+
+
+
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
AGND
V
IN
IN
OFFSET
TRIM
OFFSET
OFFSET
(ADJUST OFFSET FIRST AT 0V, THEN ADJUST GAIN)
50k
TRIM
TRIM
100
2.2 F
5V
50k
50k
CONNECT R3
+
5V
5V
200
200
TRIM
GAIN
33.2k
AGND
TRIM
TRIM
V
V
GAIN
GAIN
TO
50k
IN
IN
33.2k
33.2k
V
5V
50k
50k
IN
IN
5V
5V
V
WITH TRIM
IN
576k
100
576k
576k
2.2 F
2.2 F
2.2 F
2.2 F
2.2 F
100
200
V
IN
+
+
+
+
+
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
IN
IN
IN
IN
IN
IN
IN
IN
IN
13.3k
10.7k
INPUT
10k
1609 F03a
1609fa