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L3281 数据表(PDF) 4 Page - STMicroelectronics

部件名 L3281
功能描述  LOW VOLTAGE TELEPHONE SPEECH CIRCUITS
PDF  10 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

L3281 数据表(HTML) 4 Page - STMicroelectronics

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ELECTRICAL CHARACTERISTICS IL = 20 to 100mA; R4 =( 51
Ω // diode) + 33Ω;
T= 25
°C; f = 1kHz; Unless Otherwise Specified
Symbol
Parameter
Test Condition
Min.
Typ.
Max.
Unit
Vl
Line Voltage
IL = 6.5mA
IL = 20mA
IL = 50mA
IL = 80mA
1.65
3.4
6.0
8
3.7
6.5
9.5
V
V
V
V
CMRR
Common Mode Rej. Ratio
50
dB
Gtx
Sending Gain
Vmi = 10mV; IL = 20mA
30
31.5
33
dB
DGtx
Delta Sending Gain
Vmi = 10mV; IL = 70mA
– 7.2
–5.7
–4.2
dB
THDtx
Sending Distortion
Vso = 700mV; IL = 20mA
5
%
Ntx
Sending Noise
Vmi = 0V; IL = 50mA
– 70
dB
Zml
Mic. Input Impedance
Vmi = 10mV
40
k
Ω
Grx
Receiving Gain
IL = 20mA; Vri = 0.2V
– 10.7
– 9.2
– 7.7
dB
DGrx
Delta Receiving Gain
IL = 70mA; Vri = 0.2V
– 7.2
– 5.7
– 4.2
dB
THDrx
Receiving Distortion
Vro = 350mV; Load = 350
Ω
Vro = 300mV; IL =10 mA
5
5
%
%
Nrx
Receiving Noise
Vri = 0V
100
µV
Zro
Rec. Output Impedance
Load = 200
Ω;Vro = 50V
10
Ω
Sidetone
Vmi = 10mV
10
20
dB
Zm
Line Match. Impedance
Vri = 0.2V
500
600
700
Ω
Vso
Sending Output Voltage
IL = 6.5mA; THD = 5%
100
mV
Iro
Receiving Output Current
IL = 6.5mA; THD = 5%
0.5
mAp
MUlo
Mute Input Low
Dialing Mode
50
100
µA
MUhl
Mute Input Open
Speaking Mode
1
µA
Gmf
DTMF Gain
Vmf IN = 10mV
14.5
16
17.5
dB
Rmf
DTMF Input Impedance
5
10
k
Ω
THDmf
DTMF Distortion
Vmf LN = 140mV
5
%
Gbeep
Beeptone Gain
Vbeep IN = 25mV
8.5
dB
Rbeep
Beeptone Input Impedance
5.5
8
k
Ω
THDbeep
Beeptone Distortion
Vbeep IN = 100mV; IL = 20mA
0.5
5
%
Vz
Zener Voltage (Pin 5)
Iz = 1 mA
4.2
5.1
6.2
V
Ileak
Leakage Current,Vpin5 =3V
20
µA
L3281
4/10



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