CS3318-CQZ Cirrus Logic Inc, CS3318-CQZ Datasheet - Page 20

• Manufacturer Part Number: CS3318-CQZ
• Description: IC ANLG VOL CTRL 8CH DGTL 48LQFP
• Manufacturer: Cirrus Logic Inc
• Type: Stereo Audio Volume Controlr

Specifications of CS3318-CQZ

• Package / Case: 48-LQFP
• Applications: High End Audio
• Mounting Type: Surface Mount
• Product: General Purpose Audio Amplifiers
• Output Power: 650 mW
• Available Set Gain: 22 dB
• Thd Plus Noise: - 112 dB
• Operating Supply Voltage: +/- 8 V to +/- 9 V, 3.3 V
• Supply Current: 36 mA
• Maximum Operating Temperature: + 70 C
• Mounting Style: SMD/SMT
• Audio Load Resistance: 2 KOhms
• Input Offset Voltage: 0.75 V
• Input Signal Type: Single
• Minimum Operating Temperature: - 10 C
• Output Signal Type: Analog
• Supply Voltage (max): 9.45 V
• Supply Voltage (min): 3.1 V
• Output Type: 8-Channel Audio
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: 598-1497 - BOARD EVAL FOR CS3318 VOL CTRL
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 598-1180

20
5.5.3
Table 1
Refer to
Volume Limits
The analog section of the CS3318 is designed to accommodate gain and attenuation over the range of
+22 dB to -96 dB. Values outside this range may, however, be written to the CS3318’s internal registers.
As shown in
summed before being limited to the range allowed by the CS3318’s analog section. This architecture has
the benefit of allowing both individual and master volume control input beyond the analog range of the
CS3318.
If the effective volume (See
channel’s volume will be set to +22 dB.
If the effective volume of an individual channel is less than -96 dB, the channel will mute, but the MuteChX
bit will not be set. When the channel’s effective volume returns to -96 dB or above, the mute condition will
be released. It should be noted that if the channel’s MuteChX bit or any of the channel’s unmasked
Master X Mute bits are set, the channel will remain muted until the necessary mute conditions are re-
leased.
Channel 1
Channel 2
Channel 3
Channel 4
Channel 5
Channel 6
Channel 7
Channel 8
Referenced Control
Master X Volume.................
Master X Control .................
Master X Mask ....................
Referenced Control
MuteChX .............................
Master X Mute.....................
shows example volume settings using individual and master volume controls.
Figure 6 on page 18
Individual
+3.75 dB
+1.25 dB
-1.25 dB
-3.75 dB
Figure 6 on page
+2.5 dB
-2.5 dB
-4.0 dB
0 dB
ChX
Register Location
Register Location
“Master 1 Volume - Address 11h” on page 36
“Master 2 Volume - Address 14h” on page 37
“Master 3 Volume - Address 17h” on page 38
“Master 1 Control - Address 12h” on page 37
“Master 2 Control - Address 15h” on page 38
“Master 3 Control - Address 18h” on page 39
“Master 1 Mask - Address 10h” on page 36
“Master 2 Mask - Address 13h” on page 37
“Master 3 Mask - Address 16h” on page 38
“Mute Control - Address 0Ah” on page 33
“Master 1 Mute (Bit 1)” on page 37
“Master 2 Mute (Bit 1)” on page 38
“Master 3 Mute (Bit 1)” on page 39
Master 1
+1.0 dB
Equation 1 on page
for a graphical representation of the volume controls’ functionality.
18, the value of the Individual and Master volume control registers are
Table 1. Example Volume Settings
Mask 1
0
0
0
0
1
1
1
1
ChX
Master 2
+5.25 dB
19) of an individual channel is greater than +22 dB, the
Mask 2
0
0
1
1
0
0
1
1
ChX
Master 3
-8.5 dB
Mask 3
0
1
0
1
0
1
0
1
ChX
CS3318
Level
+3.75 dB
DS693F1
-3.25 dB
-0.25 dB
-10.0 dB
-6.25 dB
+6.5 dB
+2.5 dB
-6.0 dB
ChX