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| 型號： | LM4121AI-4.1 |
| 廠商： | National Semiconductor Corporation |
| 元件分類： | 串行ADC |
| 英文描述： | Self-Calibrating 12-Bit Plus Sign Serial I/O A/D Converters with MUX and Sample/Hold |
| 中文描述： | 自校準12位帶符號串行I /辦公自動化/ D轉(zhuǎn)換器MUX和采樣/保持 |
| 文件頁數(shù)： | 8/41頁 |
| 文件大?。?/td> | 1152K |
| 代理商： | LM4121AI-4.1 |
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DC and Logic Electrical Characteristics
(Continued)
The following specifications apply for V
+
= V
+ = V
+ = +5.0 V
, V
+ = +4.096 V
, V
= 0 V
DC
, 12-bit + sign conver-
sion mode, f
= f
= 8 MHz for the ADC12H030, ADC12H032, ADC12H034 and ADC12H038, f
CK
= f
SK
= 5 MHz for the
ADC12030, ADC12032, ADC12034 and ADC12038, R
= 25
, source impedance for V
+ and V
25
,
fully-differential input with fixed 2.048V common-mode voltage, and 10(t
) acquisition time unless otherwise specified.
Bold-
face limits apply for T
A
= T
J
= T
MIN
to T
MAX
;
all other limits T
A
= T
J
= 25C. (Notes 7, 8, 9)
Symbol
Parameter
Conditions
Typical
(Note 10)
Limits
(Note 11)
Units
(Limits)
POWER SUPPLY CHARACTERISTICS
and ADC12038
Digital Supply Current
ADC12H030, ADC12H032,
ADC12H034 and ADC12H038
I
A
+
Positive Analog Supply Current
CS = HIGH, Powered Down, CCLK off
Awake
CS = HIGH, Powered Down, CCLK on
CS = HIGH, Powered Down, CCLK off
Awake
CS = HIGH, Powered Down, CCLK on
CS = HIGH, Powered Down, CCLK off
Awake
CS = HIGH, Powered Down
20
2.3
0.9
20
2.7
10
0.1
70
0.1
μA
mA
mA
μA
3.2
4.0
mA (max)
μA
μA
μA
μA
I
REF
Reference Input Current
AC Electrical Characteristics
The following specifications apply for V
+
= V
+ = V
+ = +5.0 V
, V
+ = +4.096 V
, V
= 0 V
, 12-bit + sign conver-
sion mode, t
= t
= 3 ns, f
= f
= 8 MHz for the ADC12H030, ADC12H032, ADC12H034 and ADC12H038, f
CK
= f
SK
= 5
MHz for the ADC12030, ADC12032, ADC12034 and ADC12038, R
= 25
, source impedance for V
+ and V
≤
25
,
fully-differential input with fixed 2.048V common-mode voltage, and 10(t
) acquisition time unless otherwise specified.
Bold-
face limits apply for T
A
= T
J
= T
MIN
to T
MAX
;
all other limits T
A
= T
J
= 25C. (Note 17)
Symbol
Parameter
Conditions
(Note 10)
Typical
ADC12H030/2/4/8 ADC12030/2/4/8
Limits
(Note 11)
8
Units
(Limits)
Limits
(Note 11)
5
f
CK
Conversion Clock
(CCLK) Frequency
Serial Data Clock
SCLK Frequency
Conversion Clock
Duty Cycle
Serial Data Clock
Duty Cycle
Conversion Time
10
1
10
0
MHz (max)
MHz (min)
MHz (max)
Hz (min)
% (min)
% (max)
% (min)
% (max)
(max)
μs (max)
(max)
μs (max)
f
SK
8
5
40
60
40
60
40
60
40
60
t
C
12-Bit + Sign or 12-Bit
44(t
CK
)
44(t
CK
)
5.5
21(t
CK
)
2.625
44(t
CK
)
8.8
21(t
CK
)
4.2
8-Bit + Sign or 8-Bit
21(t
CK
)
A
www.national.com
8
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