W6811 Datasheet, PDF (8/37 Pages) Winbond – SINGLE-CHANNEL VOICEBAND CODEC

W6811
Pin
Name
Pin V_DD* Functionality
No.
V_SSD
NC
17 D
18
This is the digital supply ground. This pin should be connected to 0V.
Not Connected
V_SSA
19 A
µ/A-Law 20 D
AO
21 A
This is the analog supply ground. This pin should be connected to 0V.
Compander mode select pin. µ-Law companding is selected when this pin is
tied to V_DDD. A-Law companding is selected when this pin is tied to V_SSD.
Analog output of the first gain stage in the transmit path.
AI-
22 A Inverting input of the first gain stage in the transmit path.
AI+
23 A Non-inverting input of the first gain stage in the transmit path.
V_AG
24 A Mid-Supply analog ground pin, which supplies a 2.5 Volt reference voltage for
all-analog signal processing. This pin should be decoupled to V_SSA with a
0.01µF capacitor. This pin becomes high impedance when the chip is
powered down.
* These columns represent whether the pin Is driven by Analog (‘A’) or Digital (‘D’) power supply.
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