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| U4089B Datasheet, PDF (13/25 Pages) ATMEL Corporation – MONOLITHIC INTEGRATED FEATUREPHONE CIRCUIT | |||
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U4089B-M
Electrical Characteristics (Continued)
f = 1 kHz, 0 dBm = 775 mVrms, IM = 0.3 mA, IMP = 2 mA, RDC = 130 kW, Tamb = 25°C, RGSA = 560 kW,
Zear = 68 nF + 100 W, ZM = 68 nF, Pin 20 open, VMUTX = GND, unless otherwise specified.
Parameters
Test Conditions
Pin
Symbol
Min.
Input resistance
RGT = 27 kW,
RGT = 15 kW
Ri
60
26
Distortion of DTMF signal
IL ³ 15 mA
VL = 0 dBm
Gain deviation with current IL = 15 to 100 mA
AFS Acousting Feedback Suppression
dD
DGD
Range of attenuation
IL ³ 15 mA
Attenuation of transmit gain
IL ³ 15 mA,
IINLDT = 0 µA
RATAFS = 30 kW
IINLDR = 10 µA
Attenuation of speaker
amplifier
IL ³ 15 mA
IINLDP = 0 µ
RATAFS = 30 kW
IINLDR = 10 µ
AFS disable
IL ³ 15 mA
Supply Voltages, Vmic = 25 mV, Tamb = -10 to +60°C
IL = 14 mA,
VMP
RDC = 68 kW
IMP = 2 mA
IL ³ 14 mA,
VM
IM = 300 µA
RDC = 130 kW
0
DGT
DGSA
VATAFS
1.5
VMP
3.1
VM
1.4
VB
IB = +20 mA,
IL = 0 mA
VB
MUTX Input (see Figure 20)
Input current
Input voltage
VMUTX = VMP
VMUTX = GND
Input high
Input low
IMUTX
IMUTX
VMUTX
VMUTX
VMP -
0.3 V
Typ.
180
70
45
50
3.3
7
+20
-20
Max.
300
130
2
±0.5
50
3.5
3.3
7.6
+30
-30
0.3
Unit
kW
%
dB
dB
dB
dB
V
V
V
V
µA
µA
V
V
13
4570AâCORDâ04/03
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