TEA7092TQ 데이터 시트보기 (PDF) - STMicroelectronics
부품명
상세내역
일치하는 목록
TEA7092TQ Datasheet PDF : 24 Pages
| |||
TEA7092
DC CHARACTERISTICS (Tamb = 25°C, see Test 1)
Between IL = 8mA and IL = 20mA the DC slope is fixed by RS and RSLP :
VL(IL) = RS x (40E-6 + 0.5E-3 x IL) + RSLP/55 x (IL - 5.6E-3).
For line current higher than 20mA the slope is fixed by RSLP : VL(IL) = VL (20E-3) + RSLP/55 x (IL - 20E-3).
Symbol
VL 1
VL 2
ILSQ
I(VMC)1
I(VMC)2
VRMC
(VL-VLS)1
(VL-VLS)2
ILS1
Parameter
Line Voltage in Speech Mode
Line Voltage after Having Sent
0010101 Mask Code
Loudspeaker Amplifier Quiescent
Bias Current
Unstabilized Supply :
- Start up Current
- Unregulated Input Current
Stabilized Microprocessor Supply
ILS Drop Voltage
Loudspeaker Current Supply
Test Conditions
IL = 20mA
IL = 90mA
IL = 20mA
VLS = 4.5V
IL = 20 mA, VLS no connect, VMC = 2.4V
VRMC = 2.4V
VRMC = 3.75V
IL = 20mA, I(VRMC) = -1.8 or 0mA
VL AC = 0VRMS
IL = 20mA
IL = 90mA
VLS = 2V
IL = 20mA
IL = 90mA
Min.
4.1
6.6
10
2
3.2
11
70
Typ.
4.7
7.5
1.6
1.1
15
2.7
3.5
1.1
1.8
13
77
Max.
5.25
8.4
2.5
2.2
3.6
3.75
1.3
2.3
Unit
V
V
V
mA
mA
mA
V
V
V
mA
mA
RETURN LOSS (Tamb = 25°C, see Test 2
Symbol
Parameter
RLoss Return Loss
Test Conditions
IL = 20mA, f = 1000Hz
Min. Typ. Max. Unit
20 23
dB
TRANSMIT CHARACTERISTICS
The maximum gain Gtl is adjustable between 44
and 56dB versus RGT value
Gtl
=
20
x
log
820
x
(
RZ
// RL +
RGT //
R3 ) //
50kΩ
ZIN
ZIN = internal impedance at Pin VL # 8kΩ.
The AGC variation is programmable through two
external resistors connected on Pins ILL and ISL.
ILL is the line current at which the gain is at the
maximum value and ISL is the line current at which
the gain is at the maximum value minus 6dB. For
line current lower than ILL or higher than ISL, the
transmit and receive gains have a constant value.
The following formulas give RLL and RSL values
versus ILL and ISL.
RSL
=
ISL
310
− 5.6mA
and
RLL
=
ILL
310
− 5.6mA
Tx Softclipping (see Figure 2)
Figure 2 : Tx Softclipping and Distortion
at IL = 20mA
2
12
VLINE
1
Distortion
10
0.5
8
6
0.2
4
0.1
2
0.05
0.2
0.5 1 2
5 10 20
VMIC1-MIC2 (mVRMS)
0
50 100
6/24
Share Link: 