STA529Q STMicroelectronics, STA529Q Datasheet - Page 18

• Manufacturer Part Number: STA529Q
• Description: IC AMP 2X100MW CLASS D 52VFQFPN
• Manufacturer: STMicroelectronics
• Series: Sound Terminal™r
• Type: Class Dr

Specifications of STA529Q

• Output Type: 2-Channel (Stereo)
• Max Output Power X Channels @ Load: 100mW x 2 @ 16 Ohm
• Voltage - Supply: 1.5 V ~ 1.95 V
• Features: Depop, I²C, I²S, Mute, Volume Control
• Mounting Type: Surface Mount
• Package / Case: 52-VFQFN, 52-VFQFPN
• Ic Function: FFX Audio Codec Analogue & Digital Inputs, Class D Amplifier
• Brief Features: Up To 96dB Dynamic Range, FFX Class-D Driver
• Supply Voltage Range: 1.55V To 1.95V, 1.8V To 3.6V
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-8879

Digital processing
5.3
18/55
Volume control and gain
The volume control structure of the STA529 consists of individual volume registers for each
channel and a master volume register that provides an offset to each channel’s volume
setting. The individual channel volumes are adjustable in 0.5-dB steps from +36 dB
to -91.5 dB. As an example, if register LVOL = 0x00 or +36 dB and register MVOL = 0x18
or -12 dB, then the total gain for the left channel is +24 dB.
When the mute bit is set to 1, all channels are muted. The volume control provides a soft
mute with the volume ramping down to mute in 4096 samples from the maximum volume
setting at the internal processing rate (around 48 kHz).
Table 13.
Table 14.
0x00
0x01
0x02
…
0x78
…
0xFE
0xFF
0x00
0x01
0x02
…
0x47
0x48
0x49
…
…
0xFF
LVOL/RVOL[7:0]
MVOL[7:0]
Master volume offset as a function of register MVOL
Channel volume as a function of registers LVOL and RVOL
Doc ID 13095 Rev 2
0 dB
-0.5 dB
-1dB
…
-60 dB
…
-105 dB
Hard master mute
+36 dB
+35.5 dB
+35 dB
…
+0.5 dB
0 dB
-0.5 dB
…
…
-91.5 dB
Volume offset from channel value
Volume
STA529