Specifications

AC65/AC75 Hardware Interface Description
5.5 Pin Assignment and Signal Description
s
AC65_AC75_HD_v01.002 Page 87 of 117 2006-10-30
Confidential / Released
Analog
Audio
interface
VMIC O V
O
min = 2.4V
V
O
typ = 2.5V
V
O
max = 2.6V
I
max
= 2mA
Microphone supply for customer
feeding circuits
EPP2 O 3.0Vpp differential typical @ 0dBm0
4.2Vpp differential maximal @
3.14dBm0
Measurement conditions:
Audio mode:5 and
AT^SAIC=2,2,2,0,0,0
Outstep 3
No load
Minimum differential resp. single
ended load 27Ohms
The audio output can directly
operate a 32-Ohm-loudspeaker.
If unused keep pins open.
EPN2 O
EPP1 O 4.2Vpp (differential) typical @
0dBm0
6.0Vpp differential maximal @
3.14dBm0
Measurement conditions:
Audio mode:5 and
AT^SAIC=2,1,1,0,0,0
Outstep 4
No load
Minimum differential resp. single
ended load 7.5Ohms
The audio output can directly
operate an 8-Ohm-loudspeaker.
If unused keep pins open.
EPN1 O
MICP1 I Full Scale Input Voltage 1.6Vpp
0dBm0 Input Voltage 1.1Vpp
At MICN1, apply external bias from
1.0V to 1.6V.
Measurement conditions:
Audio mode:5 and
AT^SAIC=2,1,1,0,0,0
Balanced or single ended micro-
phone or line input with external
feeding circuit (using VMIC and
AGND).
If unused keep pins open.
MICN1 I
MICP2 I Full Scale Input Voltage 1.6Vpp
0dBm0 Input Voltage 1.1Vpp
At MICN2, apply external bias from
1.0V to 1.6V.
Measurement conditions:
Audio mode:5 and
AT^SAIC=2,2,2,0,0,0
Balanced or single ended micro-
phone or line input with external
feeding circuit (using VMIC and
AGND).
If unused keep pins open.
MICN2 I
AGND Analog Ground GND level for external audio cir-
cuits
Table 26: Signal description
Function Signal name IO Signal form and level Comment