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參數(shù)資料
| 型號： | ADC-318A |
| 廠商： | Electronic Theatre Controls, Inc. |
| 元件分類： | 圓形連接器 |
| 英文描述： | Circular Connector; No. of Contacts:85; Series:LJT00R; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:23; Circular Contact Gender:Pin; Circular Shell Style:Wall Mount Receptacle; Insert Arrangement:23-2 |
| 中文描述： | 8位，120MHz的和140MHz的全閃光的A / D轉(zhuǎn)換器 |
| 文件頁數(shù)： | 3/8頁 |
| 文件大小： | 285K |
| 代理商： | ADC-318A |
ADC-318, ADC-318A
3
318A requires that the characteristic impedance of all input/
output logic and analog input lines be properly matched.
2. Power supply lines and grounding may effect the perfor-
mance of the ADC-318 and ADC-318A. Separate and
substantial AGND and DGND ground planes are required.
These grounds have to be connected to one earth point
underneath the device. There are three digital grounds,
DGND1 (pin 29), DGND2 (pins 20, 32, 41) and DGND3 (pin
12). These DGND 's are separated internally. DGND1 and
DGND2 are always connected externally but DGND3 shall
be connected differently depending on whether the single or
dual power supply mode is used, as explained later.
The ADC-318 and ADC-318A have separate +AVs and
+DVs pins. It is recommended that both +AVs and +DVs be
powered from a single source. Other external digital circuits
must be powered with a separate +DVs. Layouts of +AVs
and +DVs lines must be separated like the GND lines to
avoid mutual interference and are connected to a point
through an LC filter. There are two digital supplies +DVs1
(pin 30) and +DVs2 (pins 19, 31, 42). These are also
separated internally. These must be tied together outside
while in use. Bypassing all power lines with a 0.1uF ceramic
chip capacitor and the use of multilayered PC boards is
recommended.
3. The analog input terminal (pin 6) has 21pF of input capaci-
tance. The input signal has to be given via a buffer amplifier
which has enough driving power. Make lead wires as short
as possible and use chip resistors and capacitors to avoid
parasitic capacitance and inductance.
4. The use of a buffer amplifier and bypass capacitors is also
recommended on the reference input terminals VRT (pin 11)
and VRB (pin 2). The analog input range is determined by
POWER REQUIREMENTS
(cont.)
Power Dissipation
ADC-318
ADC-318A
680
570
780
790
980
960
mW
mW
PARAMETERS
Operating Temp. Range, Case
ADC-318, 318A
Thermal Impedance
θ
ja
Storage Temperature Range
Package Type
Weight
–20
—
+75
°C
—
–65
62.5
—
48-pin, plastic QFP
0.25 ounces (0.7 grams)
—
°C/Watt
°C
+150
Footnotes:
VIN = +3V +0.07Vrms
VIH = DGND3–0.8V
VIL = DGND3–1.6V
VIH = 3.5V
VIL = 0.2V
TTL, 0.8 to 2.0V, CL = 5pF
DMUX Mode, CL = 5pF; FC = Clock
frequency
Straight Mode, CL = 5pF
CL = 5pF
VIN = FS, DMUX mode
VIN = FS, DMUX mode, Error >16LSB
VIN = FS, Straight mode, Error >16LSB
"Times Per Sample"
Mounted on 50x50mm 1.6mmthick
glass fiber base epoxy board
TECHNICAL NOTES
1. The ADC-318 and ADC-318A are ultra high speed full flash
A/D converters that have 120MHz and 140MHz sampling
rates respectively. The ADC-318 and ADC-318A are fully
interchangeable products with the exception of their
sampling rates. Their inputs are TTL, ECL and PECL
compatible and their outputs are TTL compatible. Obtaining
fully specified performance from the ADC-318 and ADC-
12
11
12
Figure 2-1: One Power Supply Operation (TTL, PECL)
Figure 2-2: Two Power Supply Operation (ECL)
Note: All capacitors not otherwise designated are 0.1μF
+
+
+
+
5V(A)
10μF
10μH
5V(D)
10μF
8
5
19
30 31
42
10μF
2
V
RB
+2V
ANALOG IN
+2V to +4V
4
6
7
9
11
VRT
+4V
10μF
A/D CLOCK
15
13
14
48
47
46
3
10
20
29
32
41
45
44
43
TTL
CLOCK OUT
5V(D)
28 B BIT 1
27 B BIT 2
26 B BIT 3
25 B BIT 4
24 B BIT 5
23 B BIT 6
22 B BIT 7
21 B BIT 8
LSB
MSB
40 A BIT 1
39 A BIT 2
38 A BIT 3
37 A BIT 4
36 A BIT 5
35 A BIT 6
34 A BIT 7
33 A BIT 8
LSB
MSB
ADC-318
ADC-318A
12
1
TTL
PECL
5V(D)
+
+
+
+
+
5V(A)
10μF
10μH
5V(D)
10μF
8
5
19
30 31 42
10μF
2
V
RB
+2V
ANALOG IN
+2V to +4V
4
6
7
9
11
VRT
+4V
10μF
ECL
A/D CLOCK
A/D CLOCK
15
13
14
48
47
46
3
10
1
12
20
29
32 41
10μF
5V(D)
45
44
43
TTL
CLOCK OUT
28 B BIT 1
27 B BIT 2
26 B BIT 3
25 B BIT 4
24 B BIT 5
23 B BIT 6
22 B BIT 7
21 B BIT 8
LSB
MSB
40 A BIT 1
39 A BIT 2
38 A BIT 3
37 A BIT 4
36 A BIT 5
35 A BIT 6
34 A BIT 7
33 A BIT 8
LSB
MSB
ADC-318
ADC-318A
5V(D)
5V(D)
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