MAX1284/MAX1285
400ksps/300ksps, Single-Supply, Low-Power,
Serial 12-Bit ADCs with Internal Reference
_______________________________________________________________________________________ 5
SCLK Rise to CS Fall Ignore
t
CSO
35 ns
SCLK Rise to CS Rise Hold
t
CSH
0 ns
CS Fall to SCLK Rise Setup
t
CSS
35 ns
SCLK Pulse-Width Low t
CL
62 ns
CS Rise to SCLK Rise Ignore
t
CS1
35 ns
SCLK Rise to DOUT Hold t
DOH
10 ns
SCLK Rise to DOUT Valid t
DOV
80 ns
C
LOAD
= 20pF
C
LOAD
= 20pF
SCLK Pulse-Width High t
CH
62 ns
PARAMETER SYMBOL MIN TYP MAX UNITSCONDITIONS
SCLK Period t
CP
156 ns
TIMING CHARACTERISTICS—MAX1284 (Figures 1, 2, 8, 9)
(V
DD
= +4.5V to +5.5V, T
A
= T
MIN
to T
MAX,
unless otherwise noted.)
TIMING CHARACTERISTICS—MAX1285 (Figures 1, 2, 8, 9)
(V
DD
= +2.7V to +3.6V, T
A
= T
MIN
to T
MAX,
unless otherwise noted.)
Note 1: Tested at V
DD
= V
DD(MIN)
.
Note 2: Relative accuracy is the deviation of the analog value at any code from its theoretical value after the full-scale range has
been calibrated.
Note 3: Internal reference, offset, and reference errors nulled.
Note 4: Conversion time is defined as the number of clock cycles multiplied by the clock period; clock has 50% duty cycle.
Note 5: External load should not change during conversion for specified accuracy. Guaranteed specification limit of 2mV/mA due to
production test limitations.
Note 6: Electrical characteristics are guaranteed from V
DD(MIN)
to V
DD(MAX)
. For operations beyond this range, see
Typical
Operating Characteristics
.
Note 7: MAX1284 tested with 20pF on D
OUT
and f
SCLK
= 6.4MHz, 0 to 5V. MAX1285 tested with same loads, f
SCLK
= 4.8MHz,
0 to 3V. D
OUT
= full scale.
CS Rise to DOUT Disable
t
DOD
10 65 ns
CS Fall to DOUT Enable
t
DOE
65 ns
CS Pulse-Width High
t
CSW
100 ns
C
LOAD
= 20pF
C
LOAD
= 20pF
SCLK Rise to CS Fall Ignore
t
CSO
45 ns
SCLK Rise to CS Rise Hold
t
CSH
0 ns
CS Fall to SCLK Rise Setup
t
CSS
45 ns
SCLK Pulse-Width Low t
CL
83 ns
CS Rise to SCLK Rise Ignore
t
CS1
45 ns
SCLK Rise to DOUT Hold t
DOH
13 ns
SCLK Rise to DOUT Valid t
DOV
100 ns
CS Rise to DOUT Disable
t
DOD
13 85 ns
C
LOAD
= 20pF
C
LOAD
= 20pF
CS Fall to DOUT Enable
t
DOE
85 ns
CS Pulse-Width High
t
CSW
100 ns
C
LOAD
= 20pF
C
LOAD
= 20pF
SCLK Period t
CP
208
SCLK Pulse-Width High t
CH
83 ns
PARAMETER SYMBOL MIN TYP MAX UNITSCONDITIONS
ns
