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SSM2804CBZ-R7

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SSM2804
Rev. 0 | Page 30 of 36
ALC CONTROL 1, ADDRESS 0x0A
Table 34. ALC Control 1 Register Bit Map
D7 D6 D5 D4 D3 D2 D1 D0
0 0 RECTIME[2:0] ATTIME[2:0]
Table 35. ALC Control 1 Register Bit Descriptions
Bit Name Description Settings
RECTIME[2:0] ALC release rate 000 = 4 ms per 0.5 dB step (6 dB/48 ms)
001 = 8 ms
010 = 16 ms
011 = 32 ms
100 = 64 ms
101 = 128 ms (default)
110 = 256 ms
111 = 512 ms
ATTIME[2:0] ALC attack rate 000 = 32 µs per 0.5 dB step (6 dB/384 µs)
001 = 64 µs
010 = 128 µs
011 = 256 µs (default)
100 = 512 µs
101 = 1 ms
110 = 2 ms
111 = 4 ms
SSM2804
Rev. 0 | Page 31 of 36
ALC CONTROL 2, ADDRESS 0x0B
Table 36. ALC Control 2 Register Bit Map
D7 D6 D5 D4 D3 D2 D1 D0
ALCEN COMP[1:0] ALCLV_FIX ALCLV[3:0]
Table 37. ALC Control 2 Register Bit Descriptions
Bit Name Description Settings
ALCEN ALC enable 0 = ALC disabled (default)
1 = ALC enabled
COMP[1:0]
Compressor setting (see the Soft-Knee
Compression section for more information)
00 = Compression Mode 1 (1:4 to 1:∞)
01 = Compression Mode 2 (1:1.7 to 1:4 to 1:∞)
10 = Compression Mode 3 (1:1.3 to 1:2.5 to 1:∞)
11 = Limiter mode (1:∞)
ALCLV_FIX ALC threshold mode setting 0 = supply tracking (threshold is a constant fraction of supply voltage)
1 = fixed power (threshold is a fixed voltage)
ALCLV[3:0] ALC threshold level setting See Table 38
Table 38. ALC Threshold Levels
Supply Tracking Threshold (% of PVDD) Fixed Power Threshold (V)
ALCLV[3:0] Value (ALCLV_FIX = 0) (ALCLV_FIX = 1)
0000 65 2.74
0001 67 2.89
0010 69 3.04
0011 72 3.19
0100 75 3.34
0101 78 3.50
0110 81 3.65
0111 85 3.80
1000 88 3.95
1001 93 4.10
1010 97 4.25
1011 102 4.40
1100 108 4.56
1101 114 4.71
1110 122 4.86
1111 130 5.01
SSM2804
Rev. 0 | Page 32 of 36
ALC CONTROL 3, ADDRESS 0x0C
Table 39. ALC Control 3 Register Bit Map
D7 D6 D5 D4 D3 D2 D1 D0
0 LCDBOOST RCDBOOST SOFTSTART SOFTCLIPEN NGEN NGATE[1:0]
Table 40. ALC Control 3 Register Bit Descriptions
Bit Name Description Settings
LCDBOOST Left channel Class-D gain boost 0 = 0 dB (default)
1 = +6 dB boost
RCDBOOST Right channel Class-D gain boost 0 = 0 dB (default)
1 = +6 dB boost
SOFTSTART Soft start enable 0 = soft start disabled (default)
1 = soft start enabled
SOFTCLIPEN Soft clip enable 0 = soft clip disabled (default)
1 = soft clip enabled
NGEN Noise gate enable 0 = noise gate disabled (default)
1 = noise gate enabled
NGATE[1:0] Noise gate level 00 = 2 mV (default)
01 = 4 mV
10 = 8 mV
11 = 16 mV
POWER-DOWN CONTROL, ADDRESS 0x0D
Table 41. Power-Down Control Register Bit Map
D7 D6 D5 D4 D3 D2 D1 D0
PASSPDB INCPDB INBPDB INAPDB RCDPDB LCDPDB HPPDB PWDB
Table 42. Power-Down Control Register Bit Descriptions
Bit Name Description Settings
PASSPDB Passive switch power-down 0 = power down (default)
1 = power up
INCPDB Input Channel C power-down 0 = power down (default)
1 = power up
INBPDB Input Channel B power-down 0 = power down (default)
1 = power up
INAPDB Input Channel A power-down 0 = power down (default)
1 = power up
RCDPDB Class-D right channel power-down 0 = power down (default)
1 = power up
LCDPDB Class-D left channel power-down 0 = power down (default)
1 = power up
HPPDB Headphone power-down 0 = power down (default)
1 = power up
PWDB System power-down 0 = power down (default)
1 = power up
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SSM2804CBZ-R7

Mfr. #:
Buy SSM2804CBZ-R7
Manufacturer:
Analog Devices Inc.
Description:
Audio Amplifiers Audio Subsystem w/ Stereo ClassD Speakr
Lifecycle:
New from this manufacturer.
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