參數(shù)資料
型號： LM12434CIWM
廠商： NATIONAL SEMICONDUCTOR CORP
元件分類： 模擬信號調(diào)理
英文描述： Sign Data Acquisition System with Serial I/O and Self-Calibration
中文描述： SPECIALTY ANALOG CIRCUIT, PDSO28
封裝： SOP-28
文件頁數(shù)： 7/80頁
文件大?。?/td> 1561K
代理商： LM12434CIWM
2.0 Electrical Specifications
(Continued)
2.2.2 Converter Dynamic Characteristics
The following specifications apply only to the LM12434 and LM12438 for V
A
a
e
V
D
a
e
5V, AGND
e
DGND
e
0V, V
REF
a
e
4.096V, V
REF
b
e
0V, 12-bit
a
sign conversion mode, f
CLK
e
8.0 MHz,
throughput rate
e
133.3 kHz, R
S
e
25
X
, source impedance for V
REF
a
and V
REF
b
s
25
X
, fully-differential input with fixed
2.048V common-mode voltage, and minimum acquisition time unless otherwise specified.
Boldface limits apply for T
A
e
T
J
e
T
MIN
to T
MAX
; all other limits T
A
e
T
J
e
25
§
C. (Notes 6, 7, 8 and 9) (Continued)
Symbol
Parameter
Conditions
Typical
(Note 10)
Limits
(Note 11)
Units
(Limit)
t
Z
Auto-Zero Time
Sequencer State S2(Figure 10)
76 (t
CLK
)
76 (t
CLK
)
a
50 ns
(max)
t
CAL
Full Calibration Time
Sequencer State S2(Figure 10)
4944 (t
CLK
)
4944 (t
CLK
)
a
50 ns
(max)
Throughput Rate
(Note 18)
142
140
kHz
(min)
t
WD
‘‘Watchdog’’ Mode Comparison Time
Sequencer States S6, S4,
and S5(Figure 10)
11 (t
CLK
)
11 (t
CLK
)
a
50 ns
(max)
SNR
Signal-to-Noise Ratio,
Differential Input
V
IN
e
g
4.096V (Note 20)
f
IN
e
1 kHz
f
IN
e
10 kHz
f
IN
e
62 kHz
79
79
70
dB
dB
dB
SNR
Signal-to-Noise Ratio,
Single-Ended Input
V
IN
e
4.096 V
p-p
f
IN
e
1 kHz
f
IN
e
10 kHz
f
IN
e
62 kHz
71
71
67
dB
dB
dB
SINAD
Signal-to-Noise
a
Distortion Ratio,
Differential Input
V
IN
e
g
4.096V (Note 20)
f
IN
e
1 kHz
f
IN
e
10 kHz
f
IN
e
62 kHz
79
78
67
dB
dB
dB
SINAD
Signal-to-Noise
a
Distortion Ratio,
Single-Ended Input
V
IN
e
4.096 V
p-p
f
IN
e
1 kHz
f
IN
e
10 kHz
f
IN
e
62 kHz
71
70
64
dB
dB
dB
THD
Total Harmonic Distortion,
Differential Input
V
IN
e
g
4.096V (Note 20)
f
IN
e
1 kHz
f
IN
e
10 kHz
f
IN
e
62 kHz
b
90
b
85
b
71
dBc
dBc
dBc
THD
Total Harmonic Distortion,
Distortion, Single-Ended Input
V
IN
e
4.096 V
p-p
f
IN
e
1 kHz
f
IN
e
10 kHz
f
IN
e
62 kHz
b
88
b
82
b
67
dBc
dBc
dBc
ENOB
Effective Number of Bits,
Differential Input
V
IN
e
g
4.096V (Note 20)
f
IN
e
1 kHz
f
IN
e
10 kHz
f
IN
e
62 kHz
12.6
12.2
12.1
Bits
Bits
Bits
ENOB
Effective Number of Bits,
Single-Ended Input
V
IN
e
4.096 V
p-p
f
IN
e
1 kHz
f
IN
e
10 kHz
f
IN
e
62 kHz
11.3
11.2
10.8
Bits
Bits
Bits
SFDR
Spurious Free Dynamic Range,
Differential Input
V
IN
e
g
4.096V (Note 20)
f
IN
e
1 kHz
f
IN
e
10 kHz
f
IN
e
62 kHz
90
86
76
dBc
dBc
dBc
SFDR
Spurious Free Dynamic Range,
Single-Ended Input
V
IN
e
4.096V V
p-p
f
IN
e
1 kHz
f
IN
e
10 kHz
f
IN
e
62 kHz
90
85
72
dBc
dBc
dBc
7
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