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參數資料
| 型號： | AD7628TE |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | DAC |
| 英文描述： | CMOS Dual 8-Bit Buffered Multiplying DAC |
| 中文描述： | DUAL, PARALLEL, 8 BITS INPUT LOADING, 8-BIT DAC, CQCC20 |
| 封裝： | CERAMIC, LCC-20 |
| 文件頁數： | 8/8頁 |
| 文件大小： | 193K |
| 代理商： | AD7628TE |
AD7628
–8–
REV. A
ME CHANICAL INFORMAT ION
OUT LINE DIME NSIONS
Dimensions shown in inches and (mm).
C
P
DIGIT ALLY CONT ROLLE D DUAL
T E LE PHONE AT T E NUAT OR
In this configuration, the AD7628 functions as a 2-channel
digitally controlled attenuator; ideal for stereo audio and tele-
phone signal level control applications. T able IV gives input
codes vs. attenuation for a 0 dB to 15.5 dB range.
Input Code = 256
×
10 exp
Attenuation, dB
20
Figure 15. Digitally Controlled Dual Telephone Attenuator
T able IV. Attenuation vs. DAC A, DAC B Code for the
Circuit of Figure 15
DAC Input
Code in
Decimal Attn. dB
DAC Input
Code
Code in
Decimal
Attn. dB Code
0.
0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
6.5
7.0
7.5
1 1 1 1 1 1 1 1
1 1 1 1 0 0 1 0
1 1 1 0 0 1 0 0
1 1 0 1 0 1 1 1
1 1 0 0 1 0 1 1
1 1 0 0 0 0 0 0
1 0 1 1 0 1 0 1
1 0 1 0 1 0 1 1
1 0 1 0 0 0 1 0
1 0 0 1 1 0 0 0
1 0 0 1 0 0 0 0
1 0 0 0 1 0 0 0
1 0 0 0 0 0 0 0
0 1 1 1 0 0 1
0 1 1 1 0 0 1 0
0 1 1 0 1 1 0 0
255
242
228
215
203
192
181
171
162
152
144
136
128
121
114
108
8.0
8.5
9.0
9.5
10.0
10.5
11.0
11.5
12.0
12.5
13.0
13.5
14.0
14.5
15.0
15.5
0 1 1 0 0 1 1 0
0 1 1 0 0 0 0 0
0 1 0 1 1 0 1 1
0 1 0 1 0 1 1 0
0 1 0 1 0 0 0 1
0 1 0 0 1 1 0 0
0 1 0 0 1 0 0 0
0 1 0 0 0 1 0 0
0 1 0 0 0 0 0 0
0 0 1 1 1 1 0 1
0 0 1 1 1 0 0 1
0 0 1 1 0 1 1 0
0 0 1 1 0 0 1
0 0 1 1 0 0 0 0
0 0 1 0 1 1 1 0
0 0 1 0 1 0 1 1
102
96
91
86
81
76
72
68
64
61
57
54
51
48
46
43
20-Pin Cerdip (Q Suffix)
20-Pin Plastic DIP (N Suffix)
20-T erminal
Leadless Chip
Carrier (E Suffix)
20-T erminal
Plastic Leaded
Chip Carrier (P Suffix)
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