LTC1090_15 Datasheet, PDF (13/28 Pages) Linear Technology – Single Chip 10-Bit Data Acquisition System

APPLICATIO S I FOR ATIO
8-Bit Word Length
CS
t _SMPL
t _CONV
LTC1090
SCLK
D_OUT
MSB FIRST
D_OUT
LSB FIRST
10-Bit Word Length
CS
1
8
(SB)
B9 B8 B7 B6 B5 B4 B3 B2
B0 B1 B2 B3 B4 B5 B6 B7
THE LAST TWO BITS
ARE TRUNCATED
LTC1090 • AI08A
t _SMPL
t _CONV
SCLK
D_OUT
MSB FIRST
D_OUT
LSB FIRST
12-Bit Word Length
CS
1
10
(SB)
B9 B8 B7 B6 B5 B4 B3 B2 B1 B0
(SB)
B0 B1 B2 B3 B4 B5 B6 B7 B8 B9
LTC1090 • AI08B
t _SMPL
t _CONV
SCLK
D_OUT
MSB FIRST
D_OUT
LSB FIRST
16-Bit Word Length
CS
1
10
12
(SB)
FILL
B9 B8 B7 B6 B5 B4 B3 B2 B1 B0 _ZEROES
(SB)
B0 B1 B2 B3 B4 B5 B6 B7 B8 B9 * *
LTC1090 • AI08C
t _SMPL
t _CONV
SCLK
D_OUT
MSB FIRST
D_OUT
LSB FIRST
1
10
(SB)
B9 B8 B7 B6 B5 B4 B3 B2 B1 B0
FILL
ZEROES
(SB)
B0 B1 B2 B3 B4 B5 B6 B7 B8 B9 * * * * *
*IN UNIPOLAR MODE, THESE BITS ARE FILLED WITH ZEROES.
IN BIPOLAR MODE, THE SIGN BIT IS EXTENDED INTO THESE LOCATIONS
16
*
LTC1090 • AI08D
Figure 2. Data Output (D_OUT) Timing with Different Word Lengths
1090fc
13