ml7029 Oki Semiconductor, ml7029 Datasheet - Page 4

• Manufacturer Part Number: ml7029
• Description: Multifunction Adpcm Codec
• Manufacturer: Oki Semiconductor

FEDL7029-03
OKI Semiconductor
ML7029
PIN FUNCTIONAL DESCRIPTIONS
AIN–, GEX
Transmit analog input and transmit level adjustment.
AIN– is connected to the inverting input of the transmit amplifier. GSX is connected to the transmit amplifier
output. During power-down mode, the GSX output is a high impedance state.
VFRO
Receive analog output. During power-down mode, the VFRO output is in a high impedance state.
SG
Analog signal ground.
The output voltage of this pin is approximately 1.4 V. Put 10 µF plus 0.1 µF (ceramic type) bypass capacitors
between this pin and AG. During power-down, this output voltage is 0 V. This pin should be used via a buffer if
used externally.
AG
Analog ground.
DG
Digital ground.
This ground is separated from the analog signal ground pin (AG). The DG pin must be kept as close as possible
to AG on the PCB.
Va
Analog +3 V power supply.
V
D
Digital +3 V power supply.
This power supply is separated from the analog signal power supply pin (V
). The V
pin must be kept as close
A
D
as possible to V
on the PCB.
A
PDN
Power-down and reset control input.
A “0” level makes the IC enter a power-down state. At the same time, all control register data are reset to the
initial state. Set this pin to “1” during normal operating mode. The power-down state is controlled by a logical
OR with CR0-B5 of the control register. When using PDN for power-down and reset control, set CR0-B5 to
digital “0”. The reset width (a “L” level period) should be 200 ns or more.
Be sure to reset the control registers by executing this power down to keep this pin to digital “0”level for 200 ns
or longer after the power is turned on and V
exceeds 2.7 V.
DD
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