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參數(shù)資料
| 型號(hào)： | PSB4851 |
| 英文描述： | Analog Front End for Sophisticated Answering Machine |
| 中文描述： | 模擬前端的精密應(yīng)答機(jī) |
| 文件頁(yè)數(shù)： | 36/44頁(yè) |
| 文件大小： | 752K |
| 代理商： | PSB4851 |
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PSB 4851
Data Sheet
36
09.99
4.3
AC Characteristics
Digital inputs are driven to 2.4 V for a logical “1” and to 0.45 V for a logical “0”. Timing
reference points are 2V and 0.8 V. The AC-testing waveforms are shown below.
Figure 38
Input/Output Waveforms for AC-Tests
The performance is guaranteed for 3.0V-3.6V aor 4.75V-5.25V only. In emergency mode
the supply voltage range is 3.0V-5.25V for V
DDD
/V
DDA
/V
DDP
Analog Front End Input Characteristics
1)
Parameter
Symbol
Limit Values
min.
typ.
12.5
20.5
Unit
Test Condition
max.
AXI-input impedance
AXI-input voltage swing
AXI-input voltage swing
AXI-input voltage swing
AXI-input voltage swing
AXI-gain
AXI-input impedance in
bypass-mode
AXI-gain in bypass-mode
Z
AXI
V
AXI
V
AXI
V
AXI
V
AXI
G
AXI
Z
AXI
k
mVpk 42 dB, V
dd
=5 V
Vpk
dd
=5 V
mVpk 42 dB, V
dd
=3.3 V
Vpk
0 dB, V
dd
=3.3 V
dB
9.55 mV @ 1 kHz
k
300 – 3400 Hz
300 – 3400 Hz
19
1.67
9.53
0.75
42
160
270
G
AXI
0
dB
1V @ 1 kHz
MIP/MIN1,2-input voltage
swing
MIP/MIN1,2-input voltage
swing
MIP/MIN1,2-gain
V
MIP/MIN
19
mVpk 42 dB, V
dd
=5 V
V
MIP/MIN
9.53
mVpk 42 dB, V
dd
=3.3 V
G
MIP/MIN
42
dB
9.55 mV @ 1 kHz
1)
The maximum voltage swing at the internal paths corresponds to the maximum PCM-code (
±
127).
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