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ADC12H030 Datasheet(PDF) 8 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part No. ADC12H030
Description  Self-Calibrating 12-Bit Plus Sign Serial I/O A/D Converters with MUX and Sample/Hold
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Maker  NSC [National Semiconductor (TI)]
Homepage  http://www.national.com
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ADC12H030 Datasheet(HTML) 8 Page - National Semiconductor (TI)

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DC and Logic Electrical Characteristics (Continued)
The following specifications apply for V
+ =V
A+=VD+ = +5.0 VDC,VREF+ = +4.096 VDC,VREF−=0 VDC, 12-bit + sign conver-
sion mode, f
CK =fSK = 8 MHz for the ADC12H030, ADC12H032, ADC12H034 and ADC12H038, fCK =fSK = 5 MHz for the
ADC12030, ADC12032, ADC12034 and ADC12038, R
S =25
Ω, source impedance for V
REF+ and VREF
≤ 25Ω,
fully-differential input with fixed 2.048V common-mode voltage, and 10(t
CK) acquisition time unless otherwise specified. Bold-
face limits apply for T
A =TJ =TMIN to TMAX; all other limits TA =TJ = 25˚C. (Notes 7, 8, 9)
Symbol
Parameter
Conditions
Typical
Limits
Units
(Note 10)
(Note 11)
(Limits)
POWER SUPPLY CHARACTERISTICS
and ADC12038
CS = HIGH, Powered Down, CCLK off
20
µA
Digital Supply Current
Awake
2.3
3.2
mA
ADC12H030, ADC12H032,
CS = HIGH, Powered Down, CCLK on
0.9
mA
ADC12H034 and ADC12H038
CS = HIGH, Powered Down, CCLK off
20
µA
I
A+
Positive Analog Supply Current
Awake
2.7
4.0
mA (max)
CS = HIGH, Powered Down, CCLK on
10
µA
CS = HIGH, Powered Down, CCLK off
0.1
µA
I
REF
Reference Input Current
Awake
70
µA
CS = HIGH, Powered Down
0.1
µA
AC Electrical Characteristics
The following specifications apply for V
+ =V
A+=VD+ = +5.0 VDC,VREF+ = +4.096 VDC,VREF−=0 VDC, 12-bit + sign conver-
sion mode, t
r =tf = 3 ns, fCK =fSK = 8 MHz for the ADC12H030, ADC12H032, ADC12H034 and ADC12H038, fCK =fSK =5
MHz for the ADC12030, ADC12032, ADC12034 and ADC12038, R
S =25
Ω, source impedance for V
REF+ and VREF
≤ 25Ω,
fully-differential input with fixed 2.048V common-mode voltage, and 10(t
CK) acquisition time unless otherwise specified. Bold-
face limits apply for T
A =TJ =TMIN to TMAX; all other limits TA =TJ = 25˚C. (Note 17)
Symbol
Parameter
Conditions
Typical
(Note 10)
ADC12H030/2/4/8 ADC12030/2/4/8
Units
(Limits)
Limits
Limits
(Note 11)
(Note 11)
f
CK
Conversion Clock
10
85
MHz (max)
(CCLK) Frequency
1
MHz (min)
f
SK
Serial Data Clock
10
85
MHz (max)
SCLK Frequency
0
Hz (min)
Conversion Clock
40
40
% (min)
Duty Cycle
60
60
% (max)
Serial Data Clock
40
40
% (min)
Duty Cycle
60
60
% (max)
t
C
Conversion Time
12-Bit + Sign or 12-Bit
44(t
CK)
44(t
CK)
44(t
CK)
(max)
5.5
8.8
µs (max)
8-Bit + Sign or 8-Bit
21(t
CK)
21(t
CK)
21(t
CK)
(max)
2.625
4.2
µs (max)
www.national.com
8


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