Datasheet
ADC12030, ADC12032, ADC12034
ADC12038, ADC12H030, ADC12H032
ADC12H034, ADC12H038
SNAS080K –JULY 1999–REVISED MARCH 2013
www.ti.com
AC Electrical Characteristics (continued)
The following specifications apply for V
+
= V
A
+ = V
D
+ = +5.0 V
DC
, V
REF
+ = +4.096 V
DC
, V
REF
− = 0 V
DC
, 12-bit + sign
conversion mode, t
r
= t
f
= 3 ns, f
CK
= f
SK
= 8 MHz for the ADC12H030, ADC12H032, ADC12H034 and ADC12H038, f
CK
= f
SK
= 5 MHz for the ADC12030, ADC12032, ADC12034 and ADC12038, R
S
= 25Ω, source impedance for V
REF
+ and V
REF
− ≤
25Ω, fully-differential input with fixed 2.048V common-mode voltage, and 10(t
CK
) acquisition time unless otherwise specified.
Boldface limits apply for T
A
= T
J
= T
MIN
to T
MAX
; all other limits T
A
= T
J
= 25°C.
(1)
Typical ADC12H030/2/4/8 ADC12030/2/4/8 Units
Parameter Test Conditions
(2)
Limits
(3)
Limits
(3)
(Limits)
6(t
CK
) 6(t
CK
) (min)
6(t
CK
)
7(t
CK
) 7(t
CK
) (max)
6 Cycles
Programmed
0.75 1.2 µs (min)
0.875 1.4 µs (max)
10(t
CK
) 10(t
CK
) (min)
10(t
CK
)
11(t
CK
) 11(t
CK
) (max)
10 Cycles
Programmed
1.25 2.0 µs (min)
1.375 2.2 µs (max)
t
A
Acquisition Time
(4)
18(t
CK
) 18(t
CK
) (min)
18(t
CK
)
19(t
CK
) 19(t
CK
) (max)
18 Cycles
Programmed
2.25 3.6 µs (min)
2.375 3.8 µs (max)
34(t
CK
) 34(t
CK
) (min)
34(t
CK
)
35(t
CK
) 35(t
CK
) (max)
34 Cycles
Programmed
4.25 6.8 µs (min)
4.375 7.0 µs (max)
4944(t
CK
) 4944(t
CK
) 4944(t
CK
) (max)
t
CKAL
Self-Calibration Time
618.0 988.8 µs (max)
76(t
CK
) 76(t
CK
) 76(t
CK
) (max)
t
AZ
Auto Zero Time
9.5 15.2 µs (max)
2(t
CK
) 2(t
CK
) 2(t
CK
) (min)
3(t
CK
) 3(t
CK
) (max)
Self-Calibration or Auto Zero
t
SYNC
Synchronization Time from DOR
0.250 0.40 µs (min)
0.375 0.60 µs (max)
DOR High Time when CS is Low
t
DOR
Continuously for Read Data and 9(t
SK
) 9(t
SK
) 9(t
SK
) (max)
Software Power Up/Down 1.125 1.8 µs (max)
8(t
SK
) 8(t
SK
) 8(t
SK
) (max)
t
CONV
CONV Valid Data Time
1.0 1.6 µs (max)
(4) If SCLK and CCLK are driven from the same clock source, then t
A
is 6, 10, 18 or 34 clock periods minimum and maximum.
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ADC12H038