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參數(shù)資料
| 型號(hào)： | AS2504 |
| 廠商： | AUSTRIAMICROSYSTEMS AG |
| 英文描述： | ECONOLINE: REC3-S_DRW(Z)/H4,H6 - Safety standards and approval: EN 60950 certified, rated for 250VAV (LVD test report)- Applied for Ul 1950 Component Recognised Certification- 3W DIP Package- 4kVDC & 6kVDC Isolation- Regulated Output- Continuous Short Circiut Protection Auto-Restarting |
| 中文描述： | 無繩電話，應(yīng)答機(jī)線路接口 |
| 文件頁數(shù)： | 5/12頁 |
| 文件大?。?/td> | 202K |
| 代理商： | AS2504 |
Preliminary Data Sheet
AS2504
5/12
August 1998
The gain of the ATI1 —> LS is set to 6dB. The
input is unbalanced with an impedance of
25k
. There is no softclipping.
The gain of the ATI2 —> LS is set to 20dB.
The input is unbalanced with an impedance of
100k
. There is no softclipping.
Intercom path
The gain of the ATI3 —> ROH1 is set to 6dB.
The input is unbalanced with an impedance of
100k
. There is no softclipping.
The gain of the ATI3 —> ROH2 is set to 12dB.
The input is unbalanced with an impedance of
100k
. There is no softclipping.
The gain of the M1/M2 —> ARO1 is set to
23dB. The input is differential with an
impedance of 20k
. The soft clip circuit limits
the output voltage at ARO1 to 0.4V
p.
The
attack time is 30μs/6dB and the decay time is
20ms/6dB.
The gain of the M3/M4 —> ARO1 is set to
29dB. The input is differential with an
impedance of 10k
. The soft clip circuit limits
the output voltage at ARO1 to 0.4V
p.
The
attack time is 30μs/6dB and the decay time is
20ms/6dB.
Receive path
The gain of the LS —> ROH1 receive path is
set to 3dB. The receive input is the differential
signal of RI and STB. The soft clip circuit limits
the output voltage at ROH1 to 0.7V
p.
It
prevents harsh distortion and acoustic shock.
There is volume control and LLC for this path.
The gain of the LS —> ROH2 receive path is
set to 9dB. The receive input is the differential
signal of RI and STB. The soft clip circuit limits
the output voltage at ROH2 to 1.4V
p.
It
prevents harsh distortion and acoustic shock.
There is volume control and LLC for this path.
The gain of the LS —> ARO1 receive path is
set to 3dB. The receive input is the differential
signal of RI and STB. There is no softclipping,
no LLC and no volume control for this path.
Rx volume control
The volume control is available for LS —>
ROH1 and LS —> ROH2. It can be decreased
by 6dB and increased by 8dB in 2dB steps
from the default levels as described in the last
paragraph. It remains in the pre-set position as
long as VDD does not decrease less than 2.2V
Line Loss Compensation
The line loss compensation is a pin option.
When it is activated, the transmit and receive
gains for both I/O’s are decreased by 6dB at
line currents from 20mA to 50mA when the
LLC-pin is connected to AGND and from 45mA
to 75mA when the LLC-pin is connected to
VDD. The line loss compensation is
deactivated when LLC-pin is connected to
VSS.
Digital interface
The selection of the available signal paths
must be set via the digital control pins. The
following modes are possible:
HSS: bit
RX0: bit
0
1
0
1
0
0
1
1
LS —> ROH1
LS —> ROH2
ATI3 —> ROH1
ATI3 —> ROH2
AUX0: bit
AUX1: bit
HSS: bit
1
0
1
1
X
0
MUTE
M1/M2 —>
ARO1
M3/M4 —>
ARO1
LS —>
ARO1
MUTE
0
1
1
1
0
X
0
0
X
TX0: bit
TX1: bit
HSS: bit
0
0
0
1
1
0
0
1
0
1
0
1
X
X
X
M1/M2 —> LS
M3/M4 —> LS
ATI1 —> LS
ATI2 —> LS
MUTE
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