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| 型號(hào)： | ADC12032CIWM |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 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： | 2-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, SERIAL ACCESS, PDSO20 |
| 封裝： | SOP-20 |
| 文件頁(yè)數(shù)： | 6/41頁(yè) |
| 文件大小： | 1036K |
| 代理商： | ADC12032CIWM |
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Converter 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
S
= 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.
Boldface 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)
STATIC CONVERTER CHARACTERISTICS
Offset Error
8-bit + sign mode,
after Auto-Zero (Note 13)
V
IN
(+) = V
IN
() = + 2.048V
8-bit + sign mode
after Auto-Zero
(Notes 12, 13, 14)
±
1/2
LSB (max)
TUE
Total Unadjusted Error
±
3/4
LSB (max)
Multiplexer Channel
to Channel Matching
Power Supply Sensitivity
±
0.05
LSB
V
+
= +5V
±
10%
V
REF
= +4.096V
Offset Error
±
0.5
±
0.5
±
0.5
±
0.5
±
0.5
±
1
±
1.5
±
1.5
LSB (max)
LSB (max)
LSB (max)
LSB
LSB
LSB (max)
LSB (min)
+ Full-Scale Error
Full-Scale Error
+ Integral Linearity Error
Integral Linearity Error
Output Data from
“12-Bit Conversion of Offset”
(see Table 5)
Output Data from
“12-Bit Conversion of Full-Scale”
(see Table 5)
UNIPOLAR DYNAMIC CONVERTER CHARACTERISTICS
S/(N+D)
Signal-to-Noise Plus
Distortion Ratio
(Note 20)
+10
10
(Note 20)
4095
4093
LSB (max)
LSB (min)
f
IN
= 1 kHz, V
IN
= 5 V
PP
, V
REF+
= 5.0V
f
IN
= 20 kHz, V
IN
= 5 V
PP
, V
REF+
= 5.0V
f
IN
= 40 kHz, V
IN
= 5 V
PP
, V
REF
+ = 5.0V
V
IN
= 5 V
PP
, where S/(N+D) drops 3 dB
69.4
68.3
65.7
31
dB
dB
dB
kHz
3 dB Full Power Bandwidth
DIFFERENTIAL DYNAMIC CONVERTER CHARACTERISTICS
S/(N+D)
Signal-to-Noise Plus
Distortion Ratio
f
IN
= 1 kHz, V
IN
=
±
5V, V
REF+
= 5.0V
f
IN
= 20 kHz, V
IN
=
±
5V, V
REF+
= 5.0V
f
IN
= 40 kHz, V
IN
=
±
5V, V
REF+
= 5.0V
V
IN
=
±
5V, where S/(N+D) drops 3 dB
77.0
73.9
67.0
40
dB
dB
dB
kHz
3 dB Full Power Bandwidth
REFERENCE INPUT, ANALOG INPUTS AND MULTIPLEXER CHARACTERISTICS
C
REF
Reference Input Capacitance
C
A/D
A/DIN1 and A/DIN2 Analog
Input Capacitance
A/DIN1 and A/DIN2 Analog
Input Leakage Current
CH0–CH7 and COM
Input Voltage
C
CH
CH0–CH7 and COM
Input Capacitance
C
MUXOUT
MUX Output Capacitance
85
75
pF
pF
V
IN
= +5.0V or
V
IN
= 0V
±
0.1
±
1.0
μA (max)
GND 0.05
V
A
+ + 0.05
V (min)
V (max)
pF
10
20
pF
www.national.com
6
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