AD7628KRZ Analog Devices Inc, AD7628KRZ Datasheet - Page 8

• Manufacturer Part Number: AD7628KRZ
• Description: IC DAC 8BIT DUAL W/BUFF 20-SOIC
• Manufacturer: Analog Devices Inc

Specifications of AD7628KRZ

• Settling Time: 400ns
• Number Of Bits: 8
• Number Of Converters: 2
• Voltage Supply Source: Single Supply
• Power Dissipation (max): 450mW
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 20-SOIC (7.5mm Width)
• Resolution (bits): 8bit
• Input Channel Type: Parallel
• Data Interface: Parallel
• Supply Voltage Range - Analogue: 10.8V To 15.75V
• Supply Current: 2mA
• Digital Ic Case Style: SOIC
• No. Of Pins: 20
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

AD7628
DIGITALLY CONTROLLED DUAL
TELEPHONE ATTENUATOR
In this configuration, the AD7628 functions as a 2-channel
digitally controlled attenuator; ideal for stereo audio and tele-
phone signal level control applications. Table IV gives input
codes vs. attenuation for a 0 dB to 15.5 dB range.
Input Code = 256 10 exp
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
Figure 15. Digitally Controlled Dual Telephone Attenuator
Table IV. Attenuation vs. DAC A, DAC B Code for the
Circuit of Figure 15
DAC Input
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
Code in
Decimal Attn. dB Code
255
242
228
215
203
192
181
171
162
152
144
136
128
121
114
108
Attenuation, dB
10.0
10.5
11.0
11.5
12.0
12.5
13.0
13.5
14.0
14.5
15.0
15.5
8.0
8.5
9.0
9.5
20
DAC Input
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
Code in
Decimal
102
96
91
86
81
76
72
68
64
61
57
54
51
48
46
43
–8–
MECHANICAL INFORMATION
Dimensions shown in inches and (mm).
20-Pin Plastic DIP (N Suffix)
OUTLINE DIMENSIONS
20-Pin Cerdip (Q Suffix)
Chip Carrier (P Suffix)
Carrier (E Suffix)
Plastic Leaded
Leadless Chip
20-Terminal
20-Terminal
REV. A