adc12032 National Semiconductor Corporation, adc12032 Datasheet - Page 9

• Manufacturer Part Number: adc12032
• Description: 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
Symbol
A
CKAL
AZ
SYNC
DOR
CONV
HPU
SPU
Symbol
AC Electrical Characteristics
The following specifications apply for V
sion mode, t
MHz for the ADC12030, ADC12032, ADC12034 and ADC12038, R
fully-differential input with fixed 2.048V common-mode voltage, and 10(t
face limits apply for T
AC Electrical Characteristics
The following specifications apply for V
sion mode, t
MHz for the ADC12030, ADC12032, ADC12034 and ADC12038, R
fully-differential input with fixed 2.048V common-mode voltage, and 10(t
face limits apply for 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
r
r
= t
= t
Parameter
f
f
= 3 ns, f
= 3 ns, f
A
A
Parameter
= T
= T
CK
CK
J
J
= f
= f
= T
= T
SK
SK
6 Cycles Programmed
10 Cycles Programmed
18 Cycles Programmed
34 Cycles Programmed
MIN
MIN
= 8 MHz for the ADC12H030, ADC12H032, ADC12H034 and ADC12H038, f
= 8 MHz for the ADC12H030, ADC12H032, ADC12H034 and ADC12H038, f
to T
to T
+
+
= V
= V
Conditions
MAX
MAX
A
A
+ = V
+ = V
; all other limits T
; all other limits T
(Continued)
D
D
+ = +5.0 V
+ = +5.0 V
Conditions
4944(t
(Note 10)
9
Typical
10(t
18(t
34(t
76(t
DC
DC
A
6(t
2(t
A
9(t
8(t
= T
= T
, V
, V
CK
CK
SK
SK
S
S
CK
CK
CK
CK
CK
REF
= 25Ω, source impedance for V
)
)
)
)
REF
= 25Ω, source impedance for V
J
J
)
)
)
)
)
= 25˚C. (Note 17)
= 25˚C. (Note 17)
CK
CK
+ = +4.096 V
+ = +4.096 V
) acquisition time unless otherwise specified. Bold-
ADC12H030/2/4/8 ADC12030/2/4/8
) acquisition time unless otherwise specified. Bold-
4944(t
(Note 11)
10(t
11(t
18(t
19(t
34(t
35(t
76(t
Limits
6(t
7(t
2(t
3(t
9(t
8(t
0.875
1.375
2.375
4.375
618.0
0.250
0.375
1.125
0.75
1.25
2.25
4.25
9.5
1.0
CK
CK
CK
CK
SK
SK
CK
CK
CK
CK
CK
CK
CK
(Note 10)
Typical
CK
)
)
)
)
)
)
DC
DC
)
)
)
)
)
)
)
140
140
)
, V
, V
REF
REF
− = 0 V
− = 0 V
4944(t
(Note 11)
10(t
11(t
18(t
19(t
34(t
35(t
76(t
Limits
6(t
7(t
2(t
3(t
9(t
8(t
988.8
15.2
0.40
0.60
REF
REF
1.2
1.4
2.0
2.2
3.6
3.8
6.8
7.0
1.8
1.6
(Note 11)
CK
CK
CK
CK
SK
SK
DC
DC
Limits
CK
CK
CK
CK
CK
CK
CK
250
250
+ and V
CK
+ and V
)
)
)
)
)
)
, 12-bit + sign conver-
, 12-bit + sign conver-
)
)
)
)
)
)
)
)
CK
REF
CK
REF
www.national.com
= f
= f
− ≤ 25Ω,
− ≤ 25Ω,
µs (max)
µs (max)
µs (max)
µs (max)
µs (max)
µs (max)
µs (max)
µs (max)
µs (max)
(Limits)
µs (min)
µs (min)
µs (min)
µs (min)
µs (min)
µs (max)
µs (max)
Units
(max)
(max)
(max)
(max)
(max)
(max)
(max)
(max)
(max)
(Limits)
(min)
(min)
(min)
(min)
(min)
SK
SK
Units
= 5
= 5