欢迎访问ic37.com |
会员登录 免费注册
发布采购

AD7528LR 参数 Datasheet PDF下载

AD7528LR图片预览
型号: AD7528LR
PDF下载: 下载PDF文件 查看货源
内容描述: CMOS双8位缓冲乘法DAC [CMOS Dual 8-Bit Buffered Multiplying DAC]
分类和应用:
文件页数/大小: 8 页 / 191 K
品牌: AD [ ANALOG DEVICES ]
 浏览型号AD7528LR的Datasheet PDF文件第1页浏览型号AD7528LR的Datasheet PDF文件第2页浏览型号AD7528LR的Datasheet PDF文件第3页浏览型号AD7528LR的Datasheet PDF文件第4页浏览型号AD7528LR的Datasheet PDF文件第5页浏览型号AD7528LR的Datasheet PDF文件第6页浏览型号AD7528LR的Datasheet PDF文件第7页  
AD7528
DIGITALLY CONTROLLED DUAL TELEPHONE
ATTENUATOR
In this configuration the AD7528 functions as a 2-channel digi-
tally controlled attenuator. Ideal for stereo audio and telephone
signal level control applications. Table IV gives input codes vs.
attenuation for a 0 dB to 15.5 dB range.
Input Code
= 256
V
DD
V
IN
A
DAC A
A1
DB0
DB7
Table IV. Attenuation vs. DAC A, DAC B Code for the Circuit
of Figure 15
Attn. DAC Input
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
11111111
11110010
11100100
11010111
11001011
11000000
10110101
10101011
10100010
10011000
10010000
10001000
10000000
01111001
01110010
01101100
Code In
Decimal
255
242
228
215
203
192
181
171
162
152
144
136
128
121
114
108
Attn. DAC Input
dB
Code
88.0
88.5
89.0
89.5
10.0
10.5
11.0
11.5
12.0
12.5
13.0
13.5
14.0
14.5
15.0
15.5
01100110
01100000
01011011
01010110
01010001
01001100
01001000
01000100
01000000
00111101
00111001
00110110
00110011
00110000
00101110
00101011
Code In
Decimal
102
96
91
86
81
76
72
68
64
61
57
54
51
48
46
43
C681e–0–9/98
PRINTED IN U.S.A.
Attenuation
,
dB
10
exp
 −
20
V
OUT
A
DATA BUS
CS
WR
DAC A/DAC
B
V
IN
B
AD7528
V
OUT
B
A2
DAC B
SUGGESTED
OP AMP: AD644
Figure 15. Digitally Controlled Dual Telephone Attenuator
For further applications information the reader is referred to
Analog Devices Application Note on the AD7528.
OUTLINE DIMENSIONS
Dimensions shown in inches and (mm).
20-Lead Cerdip (Q-20)
20
11
20-Lead Plastic DIP (N-20)
1.07 (27.18) MAX
PIN 1
1
10
0.28 (7.11)
0.24 (6.1)
0.97 (24.64)
0.935 (23.75)
0.32 (8.128)
0.29 (7.366)
0.14 (3.56)
0.125 (3.17)
SEATING
PLANE
0.145 (3.683)
MIN
0.125 (3.175)
MIN
0.011 (0.28)
0.009 (0.23)
20
1
11
10
0.255 (6.477)
0.245 (6.223)
PIN 1
0.135 (3.429)
0.125 (3.17)
0.32 (8.128)
0.30 (7.62)
0.20 (5.0)
0.14 (3.56)
0.15 (3.8)
0.125 (3.18)
0.07 (1.78) 0.02 (0.5) 0.11 (2.79)
15
0.05 (1.27) 0.016 (0.41) 0.09 (2.28)
0
LEAD NO. 1 IDENTIFIED BY DOT OR NOTCH
LEADS ARE SOLDER OR TIN-PLATED KOVAR OR ALLOY 42
SEATING
0.011 (0.28)
0.11 (2.79) 0.065 (1.66) PLANE
0.021 (0.533)
15
0.009 (0.23)
0.09 (2.28) 0.045 (1.15)
0
0.015 (0.381)
LEAD NO. 1 IDENTIFIED BY DOT OR NOTCH
LEADS ARE SOLDER OR TIN-PLATED KOVAR OR ALLOY 42
20-Lead SOIC (R-20)
0.5118 (13.00)
0.4961 (12.60)
20
20-Lead Plastic Leaded Chip Carrier (P-20A)
0.395 (10.02)
SQ
0.385 (9.78)
0.356 (9.04)
0.350 (8.89) SQ
0.048 (1.21)
0.042 (1.07)
3
4
19
PIN 1
IDENTIFIER
0.180 (4.47)
0.165 (4.19)
0.12 (3.05)
0.09 (2.29)
0.020 (0.51) MIN
0.021 (0.53)
0.013 (0.33)
0.032 (0.81)
0.026 (0.66)
11
0.2992 (7.60)
0.2914 (7.40)
1
10
0.4193 (10.65)
0.3937 (10.00)
18
TOP VIEW
(PINS DOWN)
0.050
(1.27)
BSC
PIN 1
0.1043 (2.65)
0.0926 (2.35)
0.0291 (0.74)
0.0098 (0.25)
45
8
0.02
9
(0.51)
MAX
0.02 (0.51)
MAX
14
13
0.025 (0.64)
MIN
0.060 (1.53)
MIN
0.0118 (0.30)
0.0040 (0.10)
8
0.0500 0.0192 (0.49) SEATING
0
(1.27) 0.0138 (0.35) PLANE 0.0125 (0.32)
BSC
0.0091 (0.23)
0.0500 (1.27)
0.0157 (0.40)
–8–
REV. B