ADC12034 National Semiconductor Corporation, ADC12034 Datasheet - Page 9

• Manufacturer Part Number: ADC12034
• 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
t
t
t
Symbol
Symb
C
A
CKAL
AZ
SYNC
DOR
CONV
HPU
SPU
ACC
SET-UP
Timing Characteristics
The following specifications apply for V
mode, t
ADC12030, ADC12032, ADC12034 and ADC12038, R
input with fixed 2.048V common-mode voltage, and 10(t
T
ol
A
= T
Conversion Time
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
J
r
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
= T
= t
f
MIN
= 3 ns, f
to T
Parameter
MAX
CK
; all other limits T
= f
SK
= 8 MHz for the ADC12H030, ADC12H032, ADC12H034 and ADC12H03, f
Parameter
12-Bit + Sign or 12-Bit
8-Bit + Sign or 8-Bit
6 Cycles Programmed
10 Cycles Programmed
18 Cycles Programmed
34 Cycles Programmed
+
A
= V
= T
A
Conditions
J
+ = V
= 25°C. (Note 17)
D
+ = +5.0 V
S
CK
= 25Ω, source impedance for V
) acquisition time unless otherwise specified. Boldface limits apply for
DC
9
, V
(Note 10)
4944(t
Typical
44(t
21(t
10(t
18(t
34(t
76(t
6(t
2(t
9(t
8(t
REF
CK
CK
SK
SK
CK
CK
CK
CK
CK
CK
+ = +4.096 V
CK
)
)
)
)
)
)
)
)
)
)
Conditions
)
ADC12H030/2/4/8
4944(t
(Note 11)
44(t
21(t
10(t
11(t
18(t
19(t
34(t
35(t
76(t
Limits
6(t
7(t
2(t
3(t
2.625
0.875
1.375
2.375
4.375
618.0
0.250
0.375
9(t
1.125
8(t
DC
0.75
1.25
2.25
4.25
5.5
9.5
1.0
, V
CK
CK
CK
CK
SK
SK
CK
CK
CK
CK
CK
CK
CK
CK
CK
REF
CK
)
)
)
)
)
)
REF
)
)
)
)
)
)
)
)
)
)
+ and V
− = 0 V
(Note 10)
Typical
140
140
20
ADC12030/2/4/8
REF
DC
4944(t
(Note 11)
, 12-bit + sign conversion
−
44(t
21(t
10(t
11(t
18(t
19(t
34(t
35(t
76(t
Limits
6(t
7(t
2(t
3(t
988.8
9(t
8(t
15.2
0.40
0.60
CK
≤
8.8
4.2
1.2
1.4
2.0
2.2
3.6
3.8
6.8
7.0
1.8
1.6
CK
CK
CK
CK
SK
SK
(Note 11)
25Ω, fully-differential
CK
CK
CK
CK
CK
CK
CK
CK
CK
= f
Limits
CK
)
)
)
)
)
)
)
)
)
)
)
)
)
)
)
250
250
SK
50
30
)
= 5 MHz for the
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µs (max)
µs (max)
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)
ns (max)
(Limits)
ns (min)
(max)
(max)
(max)
(max)
(max)
(max)
(max)
(max)
(max)
(max)
(max)
Units
(min)
(min)
(min)
(min)
(min)
Units