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AS2521 数据表(PDF) 11 Page - ams AG

部件名 AS2521
功能描述  Telephone Speech Circuit with Loudhearing and Handsfree
PDF  14 Pages
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制造商  AMSCO [ams AG]
网页  http://www.ams.com
标志 AMSCO - ams AG

AS2521 数据表(HTML) 11 Page - ams AG

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Preliminary
AS2520/21/20B/21B
Rev. 5.1
Page 11
May 1999
Receive
Symbol
Parameter
Condition
Min.
Typ.
Max.
Units
A
RX
Gain (LS to RO), Default
LSP Gain (LSI to LO)
Volume reset
1.5
17.5
3
19
4.5
20.5
dB
dB
∆A
TX/F
Variation with Frequency
f = 500 Hz to 3.4 kHz
+/- 0.8
dB
A
LLC
Gain Range, LLC
Speech mode; LLC = V
SS or VDD
-6
dB
A
RX
Volume Range
10 steps, each 2 dB
20
dB
THD
Distortion
V
RI < 0.2 VRMS
2
%
V
SC
A
SCO
Soft Clip Level (RO)
Soft Clip Level (LO)
Soft Clip Overdrive
V
RO =
Not AS2520B/21B; V
LO =
Unloaded
1
1.3
30
V
PEAK
V
PEAK
dB
V
RTH
A
AD
t
DECAY
t
DECAY
Threshold Voltage at RTH
Attenuation Depth
Attack Time
Decay Time
Channel control; V
RI > 0.8 VRMS
Channel control
7
15
30
25
mV
dB
µs/6dB
µs/6dB
V
NO
V
UFC
Noise Output Voltage (RO)
Unwanted Frequency
Components (RO)
HS = high; T
AMB = 25°C
50 Hz.........20 kHz
-72
-60
dBmp
dBmp
Z
IN
Input Impedance, RI
8
kohm
V
IN RI
Input Voltage Range, RI
+/- 2
V
PEAK
A
ST
Sidetone Cancellation
V
RI < 0.2 VRMS; TAMB = 25°C
26
dB
Z
IN
Input Impedance, STB
80
kohm
V
IN ST
Input Voltage Range, STB
+/- 2
V
PEAK
General Timings
Symbol
Parameter
Condition
Min.
Typ.
Max.
Units
t
VOL
Volume Key Debounce
7
ms
t
SCA
Soft Clip Attack Time
V
IN above soft clip level
0.12
ms/6dB
t
SCD
Soft Clip Decay Time
V
IN below soft clip level
128
ms/6dB
t
PDA
Peak Detector Attack Time V
IN above VTH
3.2
ms/V
t
PDD
Peak Detector Decay Time V
IN below VTH
29
ms/V
t
LPA
Low-Power Attack Time
V
PP < 3.6V
250
ms/6dB
t
LPD
Low-Power Release
V
PP > 3.6V
1
sec/6dB



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