參數(shù)資料
型號: U4090B-NFN
英文描述: Low power dual voltage comparators
中文描述: 電話線路(支援)
文件頁數(shù): 13/34頁
文件大小: 622K
代理商: U4090B-NFN
13
U4090B-N
4740A–CORD–09/03
Electrical Characteristics
f = 1 kHz, 0 dBm = 775 mV
rms
, I
M
= 0.3 mA, I
MP
= 2 mA, RDC = 130 k , T
amb
= 25°C, RGSA = 560 k ,
Z
ear
= 68 nF + 100 , Z
M
= 68 nF, pin 31 open, V
IMPSEL
= GND, V
MUTX
= GND, V
MUTR
= GND, unless otherwise specified.
Parameters
Test Conditions
DC Characteristics
I
L
= 2 mA
I
L
= 14 mA
I
L
= 60 mA
I
L
= 100 mA
Transmission Amplifier, I
L
= 14 mA, V
MIC
= 2 mV, R
GT
= 27 k , Unless Otherwise Specified
Range of transmit gain
R
GT
= 12 k
R
GT
= 27 k
I
L
14 mA
f = 300 to 3400 Hz
Pin 31 open
I
L
= 14 to 100 mA
Gain deviation
T
amb
= -10 to +60 C
CMRR of microphone amplifier
R
GT
= 12 k
R
GT
= 27 k
I
L
> 14 mA
V
L
= 700 mV
rms
I
L
> 19 mA, d < 5%
V
MIC
= 25 mV
CTXA = 1 μF
IMPSEL = open
R
GT
= 12 k
Noise at line psophometrically
weighted
G
T
= 48 dB
Anti-clipping attack time
release time
Each 3 dB overdrive
I
L
= 10 mA
I
MP
= 1 mA
RDC = 68 k
V
MIC
= 1 mV
I
M
= 300 μA
I
L
= 10 mA
I
M
= 300 μA
I
MP
= 1 mA
RDC = 68 k
V
MIC
= 10 mV
I
L
= 100 mA
R
AGA
= 20 k
Mute suppression
a) MIC muted
(microphone preamplifier)
b) TXA muted (second stage)
Symbol
Min.
Typ.
Max.
Unit
DC voltage drop over circuit
V
L
4.6
8.8
2.4
5.0
7.5
9.4
5.4
10.0
V
G
T
40
47
39.8
45
48
50
49
41.8
dB
Transmitting amplification
G
T
dB
Frequency response
G
T
±0.5
dB
Gain change with current
G
T
±0.5
dB
G
T
±0.5
dB
dB
CMRR
60
80
50
75
Input resistance of MIC amplifier
R
i
45
110
k
Distortion at line
d
t
2
%
Maximum output voltage
V
Lmax
1.8
3
4.2
dBm
V
MICOmax
-5.2
dBm
I
L
> 14 mA
no
-80
-72
dBmp
CTXA = 1 μF
0.5
9
ms
Gain at low operating current
G
T
40
42.5
dB
Distortion at low operating current
d
t
5
%
Line loss compensation
G
TI
-6.4
-5.8
-5.2
dB
I
L
14 mA
Mutx = open
G
TM
60
80
dB
IMPSEL = open
G
TTX
60
dB
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