Datasheet

LTC2302/LTC2306
18
23026fa
APPLICATIONS INFORMATION
Figure 7. LTC2302/LTC2306 Timing with a Short CONVST Pulse
S/D BIT IS A DON’T CARE (X) FOR THE LTC2302
UNIO/SS/D
B11 B10 B9 B8 B7 B6 B5 B4 B3 B2 B1 B0
t
CONV
CONVST
SCK
SDI
SDO
Hi-ZHi-Z
23026 F07
MSB LSB
t
ACQ
t
HCONVST
t
CYC
1 2 3 4 5 6 7 8 9 10 11 12
t
WHCONV
Figure 8. LTC2302/LTC2306 Bipolar Transfer Characteristics
(2’s Complement)
Figure 9. LTC2302/LTC2306 Unipolar Transfer Characteristics
(Straight Binary)
INPUT VOLTAGE (V)
0V
OUTPUT CODE (TWO’S COMPLEMENT)
–1
LSB
23026 F08
011...111
011...110
000...001
000...000
100...000
100...001
111...110
1
LSB
BIPOLAR
ZERO
111...111
FS/2 – 1LSB–FS/2
FS = 4.096V
1LSB = FS/2
N
1LSB = 1mV
INPUT VOLTAGE (V)
OUTPUT CODE
20026 F09
111...111
111...110
100...001
100...000
000...000
000...001
011...110
011...111
FS – 1LSB0V
UNIPOLAR
ZERO
FS = 4.096V
1LSB = FS/2
N
1LSB = 1mV