adc12l032 National Semiconductor Corporation, adc12l032 Datasheet - Page 7

• Manufacturer Part Number: adc12l032
• Description: 3.3v Self-calibrating 12-bit Plus Sign Serial I/o A/d Converters With Mux And Sample/hold
• Manufacturer: National Semiconductor Corporation

t
t
t
t
t
t
t
t
t
t
t
t
t
t
Symbol
A
CAL
AZ
SYNC
DOR
CONV
HPU
SPU
ACC
SET-UP
DELAY
1H
HDI
SDI
AC Electrical Characteristics
The following specifications apply for V
sion mode, t
with fixed 1.250V common-mode voltage, and 10(t
T
, t
A
0H
= T
J
= T
Acquisition Time (Note 19)
Self-Calibration Time
Auto-Zero Time
Self-Calibration or Auto-Zero
Synchronization Time from DOR
DOR High Time when CS is Low
Continuously for Read Data and
Software Power Up/Down
CONV Valid Data Time
Hardware Power-Up Time, Time from
PD Falling Edge to EOC Rising Edge
Software Power-Up Time, Time from
Serial Data Clock Falling Edge to EOC
Rising Edge
Access Time Delay from CS Falling
Edge to DO Data Valid
Set-Up Time of CS Falling Edge to
Serial Data Clock Rising Edge
Delay from SCLK Falling Edge to CS
Falling Edge
Delay from CS Rising Edge to DO
TRI-STATE
DI Hold Time from Serial Data Clock
Rising Edge
DI Set-Up Time from Serial Data Clock
Rising Edge
MIN
r
= t
to T
f
= 3 ns, f
MAX
®
Parameter
; all other limits T
CK
= f
SK
= 5 MHz, R
+
= V
A
= T
A
+ = V
S
J
= 25Ω, source impedance for V
= 25˚C. (Note 17)
(Continued)
CK
D
6 Cycles Programmed
10 Cycles Programmed
18 Cycles Programmed
34 Cycles Programmed
+ = +3.3 V
) acquisition time unless otherwise specified. Boldface limits apply for
R
L
= 3k, C
Conditions
7
DC
L
, V
= 100 pF
REF
+ = +2.500 V
4944(t
REF
(Note 10)
Typical
10(t
18(t
34(t
76(t
6(t
2(t
9(t
8(t
250
500
25
70
+ and V
0
5
5
CK
CK
SK
SK
CK
CK
CK
CK
DC
CK
)
)
)
)
)
)
)
)
, V
)
REF
REF
Limits (Note 11)
− = 0 V
− ≤ 25Ω, fully-differential input
4944(t
10(t
11(t
18(t
19(t
34(t
35(t
76(t
6(t
7(t
2(t
3(t
9(t
8(t
988.8
15.2
0.40
0.60
700
700
100
1.2
1.4
2.0
2.2
3.6
3.8
6.8
7.0
1.8
1.6
60
50
15
10
5
CK
CK
CK
CK
SK
SK
CK
CK
CK
CK
CK
CK
CK
DC
CK
)
)
)
)
)
)
)
)
)
)
)
)
)
, 12-bit + sign conver-
)
Units (Limits)
www.national.com
µs (max)
µs (max)
µs (max)
µs (max)
µs (max)
µs (max)
µs (max)
µs (max)
µs (max)
µs (max)
µs (max)
ns (max)
ns (max)
µs (min)
µs (min)
µs (min)
µs (min)
µs (min)
ns (min)
ns (min)
ns (min)
ns (min)
(max)
(max)
(max)
(max)
(max)
(max)
(max)
(max)
(max)
(min)
(min)
(min)
(min)
(min)