LTC1288_15 Datasheet, PDF (11/24 Pages) Linear Technology – 3V Micropower Sampling 12-Bit A/D Converters in SO-8 Packages

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