WM8352GEB/V Wolfson Microelectronics, WM8352GEB/V Datasheet - Page 66

Audio CODECs Audio CODEC plus pwr management

WM8352GEB/V

Manufacturer Part Number
WM8352GEB/V
Description
Audio CODECs Audio CODEC plus pwr management
Manufacturer
Wolfson Microelectronics
Datasheet

Specifications of WM8352GEB/V

Number Of Adc Inputs
2
Number Of Dac Outputs
2
Conversion Rate
48 KSPS
Interface Type
Serial (2-Wire, 3-Wire, 4-Wire)
Resolution
12 bit
Operating Supply Voltage
3.7 V
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
Package / Case
BGA
Minimum Operating Temperature
- 25 C
Number Of Channels
2 ADC/2 DAC
Supply Current
260 uA
Thd Plus Noise
- 83 dB
Audio Codec Type
Stereo
No. Of Adcs
2
No. Of Dacs
2
No. Of Input Channels
8
No. Of Output Channels
6
Adc / Dac Resolution
24bit
Adcs / Dacs Signal To Noise Ratio
95dB
Rohs Compliant
Yes
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
WM8352
w
13.4.4
The gain of each microphone pre-amplifier is controlled by writing to the appropriate control registers.
The gain of each pre-amplifier applies to all three inputs associated with that pre-amplifier, whether
inverting or non-inverting. Although the gain settings for each pre-amplifier are in two separate
registers, both gains can be changed simultaneously using the IN_VU bit (see Table 22).
Additionally, it is also possible to control the gain updates to only occur when the respective signal
crosses through zero. This feature reduces clicking noise caused by gain changes.
R80 (50h)
Left Input
Volume
R81 (51h)
Right Input
Volume
Table 22 Controlling the Microphone Pre-amplifier Gain
ADDRESS
CONTROLLING THE PRE-AMPLIFIER GAINS
BIT
7:2
7:2
14
13
14
13
8
8
INL_MUTE
INL_ZC
IN_VU
INL_VOL
[5:0]
INR_MUTE
INR_ZC
IN_VU
INR_VOL
[5:0]
LABEL
DEFAULT
01_0000
01_0000
0
0
0
0
0
0
Mute control for left channel input PGA:
0 = Input PGA not muted, normal operation
1 = Input PGA muted (and disconnected from
the following input record mixer).
Left channel input PGA zero cross enable:
0 = Update gain when gain register changes
1 = Update gain on 1st zero cross after gain
register write.
Input left PGA and input right PGA volume do
not update until a 1 is written to either IN_VU
register bit.
Left channel input PGA volume
000000 = -12dB
000001 = -11.25dB
.
010000 = 0dB
.
111111 = 35.25dB
Mute control for right channel input PGA:
0 = Input PGA not muted, normal operation
1 = Input PGA muted (and disconnected from
the following input record mixer).
Right channel input PGA zero cross enable:
0 = Update gain when gain register changes
1 = Update gain on 1st zero cross after gain
register write.
Input left PGA and input right PGA volume do
not update until a 1 is written to either IN_VU
register bit.
Right channel input PGA volume
000000 = -12dB
000001 = -11.25dB
.
010000 = 0dB
.
111111 = 35.25dB
DESCRIPTION
PD, March 2010, Rev 4.2
Production Data
66

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