adc12132 National Semiconductor Corporation, adc12132 Datasheet - Page 8

• Manufacturer Part Number: adc12132
• Description: Self-calibrating 12-bit Plus Sign Serial I/o A/d Converters With Mux And Sample/hold
• Manufacturer: National Semiconductor Corporation

www.national.com
f
f
t
t
t
t
t
t
t
Symbol
CK
SK
C
A
CAL
AZ
SYNC
DOR
CONV
AC Electrical Characteristics
The following specifications apply for (V
common-mode voltage) or (V
mode voltage), V
= f
other limits T
SK
= 5 MHz, and 10 (t
Conversion Clock (CCLK) Frequency
Serial Data Clock SCLK Frequency
Conversion Clock Duty Cycle
Serial Data Clock Duty Cycle
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
A
= T
REF
J
= 25˚C. (Note 17)
− = 0V, 12-bit + sign conversion mode, source impedance for analog inputs, V
Parameter
CK
) acquisition time unless otherwise specified. Boldface limits apply for T
+
= V
A
+ = V
+
D
= V
+ = +3.3V, V
A
+ = V
12-Bit + Sign or 12-Bit
6 Cycles Programmed
10 Cycles Programmed
18 Cycles Programmed
34 Cycles Programmed
D
+ = +5V, V
REF
Conditions
+ = +2.5V and fully-differential input with fixed 1.250V common-
8
REF
+ = +4.096V, and fully-differential input with fixed 2.048V
(Note 10)
4944(t
Typical
44(t
10(t
18(t
34(t
76(t
6(t
2(t
9(t
8(t
10
10
1
0
CK
CK
SK
SK
CK
CK
CK
CK
CK
CK
)
)
)
)
)
)
)
)
)
)
Limits (Note 11)
4944(t
44(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
8.8
1.2
1.4
2.0
2.2
3.6
3.8
6.8
7.0
1.8
1.6
40
60
40
60
REF
5
5
CK
CK
CK
CK
SK
SK
CK
CK
CK
CK
CK
CK
CK
CK
A
CK
)
)
)
)
)
)
− and V
= T
)
)
)
)
)
)
)
)
)
J
= T
REF
MIN
Units (Limits)
+ ≤ 25Ω, f
MHz (max)
MHz (max)
MHz (min)
µs (max)
µs (max)
µs (max)
µs (max)
µs (max)
µs (max)
µs (max)
µs (max)
µs (max)
µs (max)
to T
Hz (min)
% (max)
% (max)
µs (min)
µs (min)
µs (min)
µs (min)
µs (min)
% (min)
% (min)
(max)
(max)
(max)
(max)
(max)
(max)
(max)
(max)
(max)
(max)
(min)
(min)
(min)
(min)
(min)
MAX
; all
CK