User Manual

AC Electrical Characteristics
The following specifications apply for V
a
e
V
A
a
e
V
D
a
ea
3.3 V
DC
,V
REF
a
ea
2.500 V
DC
,V
REF
b
e
0V
DC
, 12-bit
a
sign conversion mode, t
r
e
t
f
e
3 ns, f
CK
e
f
SK
e
5 MHz, R
S
e
25X, source impedance for V
REF
a
and V
REF
b
s
25X, fully-
differential input with fixed 1.250V common-mode voltage, and 10(t
CK
) acquisition time unless otherwise specified. Boldface
limits apply for T
A
e
T
J
e
T
MIN
to T
MAX
; all other limits T
A
e
T
J
e
25
§
C. (Note 17)
Symbol Parameter Conditions
Typical Limits Units
(Note 10) (Note 11) (Limits)
f
CK
Conversion Clock (CCLK) Frequency 10 5 MHz (max)
1 MHz (min)
f
SK
Serial Data Clock SCLK Frequency 10 5 MHz (max)
0 Hz (min)
Conversion Clock Duty Cycle 40 % (min)
60 % (max)
Serial Data Clock Duty Cycle 40 % (min)
60 % (max)
t
C
Conversion Time 12-Bit
a
Sign or 12-Bit 44(t
CK
) 44(t
CK
) (max)
8.8 ms (max)
8-Bit
a
Sign or 8-Bit 21(t
CK
) 21(t
CK
) (max)
4.2 ms (max)
t
A
Acquisition Time 6 Cycles Programmed 6(t
CK
) 6(t
CK
) (min)
(Note 19) 7(t
CK
) (max)
1.2 ms (min)
1.4 ms (max)
10 Cycles Programmed 10(t
CK
) 10(t
CK
) (min)
11(t
CK
) (max)
2.0 ms (min)
2.2 ms (max)
18 Cycles Programmed 18(t
CK
) 18(t
CK
) (min)
19(t
CK
) (max)
3.6 ms (min)
3.8 ms (max)
34 Cycles Programmed 34(t
CK
) 34(t
CK
) (min)
35(t
CK
) (max)
6.8 ms (min)
7.0 ms (max)
t
CAL
Self-Calibration Time 4944(t
CK
) 4944(t
CK
) (max)
988.8 ms (max)
t
AZ
Auto-Zero Time 76(t
CK
) 76(t
CK
) (max)
15.2 ms (max)
t
SYNC
Self-Calibration or Auto-Zero 2(t
CK
) 2(t
CK
) (min)
Synchronization Time from DOR
3(t
CK
) (max)
0.40 ms (min)
0.60 ms (max)
t
DOR
DOR High Time when CS is Low 9(t
SK
) 9(t
SK
) (max)
Continuously for Read Data and Software
1.8 ms (max)
Power Up/Down
t
CONV
CONV Valid Data Time 8(t
SK
) 8(t
SK
) (max)
1.6 ms (max)
7