Rainbow Electronics ADC12L038 - Manual (Page 7)

AC Electrical Characteristics
The following specifications apply for V a e V
A
a e V
D
a e a 3 3 V
DC
V
REF
a e a 2 500 V
DC
V
REF
b e 0 V
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 m s (max)
8-Bit a Sign or 8-Bit 21(t
CK
) 21(t
CK
) (max)
4 2 m s (max)
t A Acquisition Time 6 Cycles Programmed 6(t CK ) 6(t CK ) (min)
(Note 19) 7(t CK ) (max)
1 2 m s (min)
1 4 m s (max)
10 Cycles Programmed 10(t CK ) 10(t CK ) (min)
11(t
CK
) (max)
2 0 m s (min)
2 2 m s (max)
18 Cycles Programmed 18(t CK ) 18(t CK ) (min)
19(t
CK
) (max)
3 6 m s (min)
3 8 m s (max)
34 Cycles Programmed 34(t
CK
) 34(t
CK
) (min)
35(t
CK
) (max)
6 8 m s (min)
7 0 m s (max)
t
CAL
Self-Calibration Time 4944(t
CK
) 4944(t
CK
) (max)
988 8 m s (max)
t AZ Auto-Zero Time 76(t CK ) 76(t CK ) (max)
15 2 m s (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 m s (min)
0 60 m s (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 m s (max)
Power Up Down
t CONV CONV Valid Data Time 8(t SK ) 8(t SK ) (max)
1 6 m s (max)
7