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CLC5957PCASM 数据表(PDF) 6 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
部件名 CLC5957PCASM
功能描述  12-bit, 70MSPS Broadband Monolithic A/D Converter
PDF  12 Pages
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制造商  NSC [National Semiconductor (TI)]
网页  http://www.national.com
标志 NSC - National Semiconductor (TI)

CLC5957PCASM 数据表(HTML) 6 Page - National Semiconductor (TI)

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6
CLC5957 Pin Definitions
AIN, AIN
(Pin 13, 14) Differential input with a common mode voltage
of +2.4V. The ADC full scale input is 1.024Vpp on each of
the complimentary input signals.
ENCODE,
(Pin 9, 10) Differential clock where ENCODE initiates a new
ENCODE
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 VCC/2 with
a termination impedance of 2.5k
Ω.
D0-D11
(Pins 30-34, 39-45) Digital data outputs are CMOS and
TTL compatible. D0 is the LSB and D11 is the MSB. MSB
is inverted. Output coding is two’s complement.
DAV
(Pin 27) Data Valid Clock. Data is valid on rising edge.
OUTLEV
(Pin 28) Output Logic 3.3V or 2.5V option.
Open = 3.3V, GND = 2.5V.
VCM
(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.
GND
(Pins 1-4, 8, 11, 12, 15, 19, 20, 23-26, 29, 35, 36, 47, 48)
circuit ground.
+AVCC
(Pins 5-7, 16-18, 22,) +5V power supply for the analog
section. Bypass to ground with a 0.1
µF capacitor.
+DVCC
(Pin 37, 38, 46) +5V power supply for the digital section.
Bypass to ground with a 0.1
µF capacitor.
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
+DVCC
4
GND
45
D11 (MSB)
5
+AVCC
44
D10
6
+AVCC
43
D9
7
+AVCC
42
D8
8
GND
41
D7
9
ENCODE
40
D6
10
ENCODE
39
D5
11
GND
38
+DVCC
12
GND
37
+DVCC
13
AIN
36
GND
14
AIN
35
GND
15
GND
34
D4
16
+AVCC
33
D3
17
+AVCC
32
D2
18
+AVCC
31
D1
19
GND
30
D0 (LSB)
20
GND
29
GND
21
VCM
28
OUTLEV
22
+AVCC
27
DAV
23
GND
26
GND
24
GND
25
GND
CLC5957



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