PCM1604 BURR-BROWN [Burr-Brown Corporation], PCM1604 Datasheet - Page 18

• Manufacturer Part Number: PCM1604
• Description: 24-Bit, 192kHz Sampling,6-Channel, Enhanced Multi-Level, Delta-Sigma DIGITAL-TO-ANALOG CONVERTER
• Manufacturer: BURR-BROWN [Burr-Brown Corporation]

REGISTER DEFINITIONS
Register 1
Register 2
Register 3
Register 4
Register 5
Register 6
R/W
ATx[7:0]
The following table shows attenuator levels for various settings.
®
1111 1111
1111 1110
1111 1101
1000 0010
1000 0001
1000 0000
0000 0000
PCM1604, PCM1605
R/W
R/W
R/W
R/W
R/W
R/W
B15
Read/Write Mode Select
When R/W = 0, a Write operation is performed.
When R/W = 1, a Read operation is performed.
Default Value: 0
Digital Attenuation Level Setting
where x = 1-6, corresponding to the DAC output V
These bits are Read/Write.
Default Value: 1111 1111
Each DAC output, V
set from 0dB to –63dB, in 0.5dB steps. Alternatively, the attenuator may be set to infinite attenuation (or
mute).
The attenuation data for each channel can be set individually. However, the data load control (ATLD bit of
Control Register 7) is common to all six attenuators. ATLD must be set to ‘1’ in order to change an
attenuator’s setting. The attenuation level may be set using the formula below.
Attenuation Level (dB) = 0.5 (ATx [7:0]
where: ATx [7:0]
for: ATx [7:0]
ATx[7:0]
•
•
•
•
•
•
IDX6
IDX6
IDX6
IDX6
IDX6
IDX6
B14
B
B
B
B
B
B
B
IDX5
IDX5
IDX5
IDX5
IDX5
IDX5
B13
DEC
DEC
= 0 through 128, the attenuator is set to infinite attenuation.
IDX4
IDX4
IDX4
IDX4
IDX4
IDX4
B12
OUT
= 0 through 255
Decimal Value
1 through V
B
IDX3
IDX3
IDX3
IDX3
IDX3
IDX3
B11
255
254
253
130
129
128
0
•
•
•
•
•
•
IDX2
IDX2
IDX2
IDX2
IDX2
IDX2
B10
OUT
6, has a digital attenuator associated with it. The attenuator may be
IDX1
IDX1
IDX1
IDX1
IDX1
IDX1
DEC
B9
18
– 255)
0dB, No Attenuation (default)
Attenuator Level Setting
IDX0
IDX0
IDX0
IDX0
IDX0
IDX0
B8
OUT
AT17
AT27
AT37
AT47
AT57
AT67
B7
x.
–62.5dB
–63.0dB
–0.5dB
–1.0dB
Mute
Mute
•
•
•
•
•
•
AT16
AT26
AT36
AT46
AT56
AT66
B6
AT15
AT25
AT35
AT45
AT55
AT65
B5
AT14
AT24
AT34
AT44
AT54
AT64
B4
AT13
AT23
AT33
AT43
AT53
AT63
B3
AT12
AT22
AT32
AT42
AT52
AT62
B2
AT11
AT21
AT31
AT41
AT51
AT61
B1
AT10
AT20
AT30
AT40
AT50
AT60
B0