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參數(shù)資料
| 型號(hào)： | U3762MB |
| 英文描述： | Stellaris Programming Services |
| 中文描述： | 通用電話芯片-所有的功能集成 |
| 文件頁(yè)數(shù)： | 17/23頁(yè) |
| 文件大?。?/td> | 248K |
| 代理商： | U3762MB |
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U3762MB
Preliminary Information
Rev. A1, 15-Sep-98
17 (23)
Electrical Characteristics Speech Circuit
Reference point Pin GND, f = 1000 Hz, 0 dBm = 775 mV
rms,
R
DC
= 39
/ 1 W, T
amb
= 25
°
C, unless otherwise specified,
refer to “Basic Test Circuit”.
Parameters
Test Conditions / Pin
Line voltage
I
L
= 8 mA
I
L
= 20 mA
I
L
= 73 mA
I
L
= 100 mA
Transmit and sidetone
Input resistance
R
i
Gain
I
L
= 20 mA, S5 = open
Gain change with current
I
L
= 20 to 60 mA
R
AGC
= infinite
Gain deviation
T
amb
= –10 to +60
°
C
I
L
= 20 mA
Line-loss compensation
R
AGC
= 12 k , I
L
= 73 mA
Max. output voltage at line
I
L
= 20 mA, V
mic
= 10 mV,
CLIM = 2.2 F, S
1
= open
Noise at line weighted
psophometrically
Sidetone reduction
I
L
20 mA
DTMF amplifier
Volume range d < 5%
Single tone, I
L
20 mA
DTMF output level low
frequency group
Pre-emphasis between
high- and low-level
frequency group
Receiving amplifier
Gain
I
L
20 mA
Gain change with current
I
L
= 20 to 60 mA
R
AGC
= infinite
Gain deviation
T
amb
= –10 to +60
°
C
I
L
= 20 mA
Line-loss compensation
I
L
= 73 mA
Receiving noise at
earphone weighted
psophometrially
Gain change when muted
I
L
20 mA
Output voltage push-pull
I
L
20 mA, Z
ear
= 68 nF,
100 in series, d
≤
2%
Ear protection differential
I
L
= 40 mA, V
gen
= 4 V
rms
,
Z
ear
= 68 nF + 100
Supply voltage (for internal use only)
Output voltage *
I
L
20 mA dialing mode
Available current for
peripherals
Distortion at line
V
L
= 0.775 V
rms
Maximum output voltage
swing at line
V
MIC
= 50 mV
rms
Mute suppression transmit
with privacy function
*
Output must be limited externally to max. 5.5 V
Symbol
V
L
Min.
Typ.
1.4
3.85
6.55
Max.
Unit
V
V
V
V
3.6
5.9
6.9
4.1
7.2
8.2
R
i
G
s
G
S
45
46.8
–0.5
80
47.8
120
48.8
0.5
k
dB
dB
G
S
–0.5
0.5
dB
G
s
–4.8
–6
1.2
–7
dB
dBm
V
Lmax
I
L
> 20 mA, G
S
= 48dB
n
o
– 72
dBmp
G
STA
10
15
20
dB
V
L
V
L
1.3
–8
dBm
dBm
I
L
= 20 mA, S5 = closed
–4
P
PRE
= P
HLG
– P
LLG,
S5 = closed
P
PRE
1
3
dB
G
R
G
R
3
5
dB
dB
–0.5
0.5
G
R
–0.3
0.7
dB
G
R
n
i
–4.7
–6
–7
–71
dB
dBm
I
L
= 73 mA
–77.5
G
RM
V
RECO
24
0.8
29
0.9
34
dB
V
rms
V
ear
1.3
1.6
2.5
V
rms
V
DD
I
DD
2.0
150
6.3
V
A
I
L
20 mA dialing mode
I
L
= 20 mA, S5 = open
d
t
2
%
I
L
= 20 mA,
V
L max
3.4
4
Vpp
I
L
= 20 mA
G
SPRIV
60
dB
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