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參數(shù)資料
| 型號： | CLC5955MTDX |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | ADC |
| 英文描述： | 11-bit, 55MSPS Broadband Monolithic A/D Converter |
| 中文描述： | 1-CH 11-BIT PROPRIETARY METHOD ADC, PARALLEL ACCESS, PDSO48 |
| 封裝： | TSSOP-48 |
| 文件頁數(shù)： | 7/10頁 |
| 文件大?。?/td> | 197K |
| 代理商： | CLC5955MTDX |
CLC5955
7
http://www.national.com
CLC5955 Pin De
fi
nitions
A
IN
,
A
IN
(Pins 13, 14) Differential input with a common mode
voltage of +2.4V. The ADC full scale input is 1.024V
on each of the complimentary input signals.
ENCODE,
ENCODE
(Pins 9, 10) Differential clock where ENCODE initiates a
new data conversion cycle on each rising edge. Logic for
these inputs are 50% duty cycle universal differential signal
(>200mV). The clock input is internally biased to V
a termination impedance of 2.5k
.
/2 with
D0-D10
(Pins 31-34, 39-45) Digital data outputs are CMOS and
TTL compatible. D0 is the LSB and D10 is the MSB. MSB
is inverted. Output coding is two’s complement.
Current limited to source/sink 2.5mA typical.
DAV
(Pin 27) Data Valid Clock. Data is valid on rising edge.
Current limited to source/sink 5mA typical.
OUTLEV
(Pin 28) Output Logic 3.3V or 2.5V option.
Open = 3.3V, GND = 2.5V.
V
CM
(Pin 21) Internal common mode voltage reference. Nominally
+2.4V. Can be used for the input common mode voltage.
This voltage is derived from an internal bandgap reference.
VCM should be buffered when driving any external load.
Failure to buffer this signal can cause errors in the internal
bias currents.
GND
(Pins 1-4, 8, 11, 12, 15, 19, 20, 23-26, 35, 36, 47, 48)
circuit ground.
+AV
CC
(Pins 5-7, 16-18, 22,) +5V power supply for the analog
section. Bypass to ground with a 0.1
μ
F capacitor.
+DV
CC
(Pins 37, 38, 46) +5V power supply for the digital section.
Bypass to ground with a 0.1
μ
F capacitor.
NC
(Pin 29) No connect. May be left open or grounded.
OGND
(Pin 30) Option ground. May be tied to GND or left floating.
Physical Dimensions
Symbol
Min
Max
Notes
A
–
1.10
A1
0.05
0.15
A2
0.80
1.05
b
0.17
0.27
b1
0.17
0.23
c
0.09
0.20
c1
0.09
0.16
D
12.40
12.60
2
E
8.1 BSC
E1
6.00
6.20
2
e
0.50 BSC
L
0.50
0.75
L1
1.00 REF
R1
0.127
Notes:
1. All dimensions are in millimeters.
2. Dimensions D and E1 do not include mold protrusion.
Allowable protrusion is 0.20mm per side.
1
GND
48
GND
2
GND
47
GND
3
GND
46
+DV
CC
4
GND
45
D10 (MSB)
5
+AV
CC
44
D9
6
+AV
CC
43
D8
7
+AV
CC
42
D7
8
GND
41
D6
9
ENCODE
40
D5
10
ENCODE
39
D4
11
GND
38
+DV
CC
12
GND
37
+DV
CC
13
A
IN
36
GND
14
A
IN
35
GND
15
GND
34
D3
16
+AV
CC
33
D2
17
+AV
CC
32
D1
18
+AV
CC
31
D0 (LSB)
19
GND
30
OGND
20
GND
29
NC
21
V
CM
28
OUTLEV
22
+AV
CC
27
DAV
23
GND
26
GND
24
GND
25
GND
CLC5955
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