ltc1285is8-trpbf Linear Technology Corporation, ltc1285is8-trpbf Datasheet - Page 11

• Manufacturer Part Number: ltc1285is8-trpbf
• Description: 3v Micropower Sampling 12-bit A/d Converters In So-8 Packages
• Manufacturer: Linear Technology Corporation

APPLICATION INFORMATION
MSB-First Data (MSBF = 0)
MSB-First Data (MSBF = 1)
CLK
D
D
CLK
D
CS
IN
CS
OUT
IN
START
START
D
OUT
HI-Z
SGL/
SGL/
DIFF
DIFF
t
t
t
suCS
suCS
SMPL
ODD/
SIGN
ODD/
SIGN
*AFTER COMPLETING THE DATA TRANSFER, IF FURTHER CLOCKS ARE APPLIED WITH CS LOW,
BECOMES A HIGH IMPEDANCE NODE, LEAVING THE CLK RUNNING TO CLOCK OUT LSB-FIRST DATA OR ZEROES.
t
THE ADC WILL OUTPUT ZEROS INDEFINITELY.
t
DATA
HI-Z
SMPL
MSBF
MSBF
: DURING THIS TIME, THE BIAS CIRCUIT AND THE COMPARATOR POWER DOWN AND THE REFERENCE INPUT
U
NULL
NULL
BIT
BIT
Figure 2. LTC1288 Operating Sequence Example: Differential Inputs (CH
(MSB)
(MSB)
B11
B11
U
B10
B10
B9
B9
W
t
B8
CYC
B8
B7
B7
DON’T CARE
t
CONV
t
CONV
B6
B6
B5
B5
U
B4
B4
t
B3
CYC
B3
B2
B2
B1 B0
DON’T CARE
B1
B0*
B1
t
DATA
B2
POWER
DOWN
HI-Z
B3
B4
B5
POWER DOWN
t
B6
LTC1285/LTC1288
DATA
+
B7
, CH
B8
–
)
B9
B10
B11
*
LTC1285/88 • F02
HI-Z
11