as2521t austriamicrosystems, as2521t Datasheet - Page 11

• Manufacturer Part Number: as2521t
• Description: Telephone Speech Circuit With Loudhearing And Handsfree
• Manufacturer: austriamicrosystems

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