ltc1411 Linear Technology Corporation, ltc1411 Datasheet - Page 14

• Manufacturer Part Number: ltc1411
• Description: Single Supply 14-bit 2.5msps Adc
• Manufacturer: Linear Technology Corporation

LTC1411
APPLICATIO S I FOR ATIO
14
Figure 12. LTC1411 Bipolar Transfer Characteristics
(2’s Complement)
CONVST
CONVST
011...111
011...110
000...001
000...000
111...111
111...110
100...001
100...000
BUSY
DATA
BUSY
DATA
–FS/2
(SAMPLE N)
t
3
t
U
5
1LSB =
t
INPUT VOLTAGE (V)
2
(SAMPLE N)
t
3
16384
BIPOLAR
–1
LSB
U
FS
ZERO
Figure 11b. CONVST Starts a Conversion with a Short Active High Pulse
DB13 TO DB0
Figure 11a. CONVST Starts a Conversion with a Short Active Low Pulse
2.5V
DATA (N – 1)
=
DB13 TO DB0
DATA (N – 1)
16384
3.6V
LSB
1
W
= 219.7 V
FS/2 – 1LSB
t
CONV
t
CONV
1411 F12
U
t
t
4
t
ACQ
4
t
ACQ
t
5
Figure 13. Offset and Full-Scale Adjustment
t
3
FULL-SCALE
DB13 TO DB0
DATA N
ADJUST
ADJUST
DB13 TO DB0
OFFSET
DATA N
750
100k
100k
10k
R2
R4
R5
R6
5V
5V
51
R1
51k
R3
51
R7
A
A
REFIN
IN
IN
LTC1411
+
–
DB13 TO DB0
DATA (N + 1)
DB13 TO DB0
DATA (N + 1)
1411 F13
1411 F11a
1411 F11b
1411f