U2090B
| Model | U2090B |
| Description | Monolithic Integrated Feature Phone Circuit |
| PDF file | Total 34 pages (File size: 675K) |
| Chip Manufacturer | ATMEL |
U4090B
Parameters
AC impedance
Distortion at low operating
current
Speaker Amplifier
Minimum line current for
operation
Input resistance
Gain from SAI to SAO
Test Conditions / Pin
V
IMPSEL
= GND
V
IMPSEL
= V
MP
I
L
= 10 mA
I
MP
= 1 mA
V
GEN
= 560 mV
RDC = 68 k
W
No ac signal
Pin 24
V
SAI
= 3 mV,
I
L
= 15 mA,
RGSA = 560 k
W
RGSA = 20 k
W
Load resistance
R
L
= 50
W
, d < 5%
V
SAI
= 20 mV
I
L
= 15 mA
I
L
= 20 mA
I
L
> 15 mA
I
L
= 15 mA
T
amb
= – 10 to + 60°C
I
L
= 15 mA,
V
L
= 0 dBm,
V
SAI
= 4 mV
Pin 23 open
I
L
= 15 to 100 mA
I
L
= 15 to 100 mA
I
L
= 15 mA
f = 300 to 3400 Hz
20 dB over drive
Symbol
Z
imp
Z
imp
Min
570
840
Typ
600
900
Max
640
960
Unit
W
W
Figure
27
dR
5
%
27
I
Lmin
14
G
SA
35.5
15
22
mA
k
W
31
31
31
36.5
–3
37.5
dB
Output power
31
P
SA
P
SA
n
SA
3
7
20
200
mW
Output noise (Input SAI
open)
psophometrically weighted
Gain deviation
m
V
psoph
dB
31
31
D
G
SA
VSAO
"
1
– 60
Mute suppression
Gain change with current
Resistor for turning off
speaker amplifier
Gain change with frequency
dBm
dB
M
W
dB
ms
ms
31
31
31
31
31
31
D
G
SA
RG
SA
0.8
1.3
"
1
2
D
G
SA
"
0.5
Attack time of anti-clipping
tr
5
Release time of anti-clip-
tf
80
ping
DTMF-Amplifier
Test conditions: IMP = 2 mA, IM = 0.3 mA, V
MUTX
= VMP
Adjustment range of DTMF I
L
= 15 mA
G
D
40
50
gain
Mute active
I
L
= 15 mA,
VDTMF = 8 mV
DTMF amplification
G
D
40.7
41.7
42.7
Mute active:
MUTX = VMP
Gain deviaton
I
L
= 15 mA
T
amb
= – 10 to + 60
°C
G
D
dB
29
dB
29
"
0.5
dB
29
TELEFUNKEN Semiconductors
Rev. C1, 28-Oct-96
17 (34)
Preliminary Information
