MH88437 Ver la hoja de datos (PDF) - Mitel Networks
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MH88437 Datasheet PDF : 16 Pages
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Advance Information
Variations from Standard Loop Electrical Characteristics
(MH88437AD-PI/MH88437AS-PI) (+70˚C to +85˚C)
Characteristics
Sym Min Typ
Max
1 Operating Loop Current
16
60
80
MH88437-P
)
Units
mA
mA
Test Conditions
CL\=0
CL\=1
DC Electrical Characteristics †
Characteristics
Sym Min Typ‡ Max Units
Test Conditions
1
Supply Current
ICC
5
mA
2 RV, Low Level Output Voltage VOL
LCD High Level Output Voltage VOH 2.4
0.4
V
V
3 LC Low Level Input Voltage
High Level Input Voltage
Low Level Input Current
High Level Input Current
VIL
0.8
V
VIH 2.0
V
IIL
0
60
µA
IIH
350 400 µA
4 VR+ DC common mode
VR-
VCM 0
2 VCC VDC
† Electrical Characteristics are over Recommended Operating Conditions unless otherwise stated.
‡ Typical figures are at 25°C with nominal + 5V supplies and are for design aid only.
VDD (= 5.0V, On-hook)
IOL = 4mA
IOH = 0.4mA
VIL = 0.0V
VIH = 5.0V
Use coupling caps for
higher voltages and single
ended
AC Electrical Characteristics †
Characteristics
Sym Min Typ‡ Max Units
1
Input Impedance
VR-
47k
Ω
94k
Ω
Test Conditions
VR+
2 Output Impedance at VX
3 Receive Gain (VR to 2-Wire)
10
-1
0
1
4 Frequency Response Gain
(relative to Gain @ 1kHz)
5 Signal Output Overload Level
at 2-Wire
at VX
-0.5
0
0.5
0
0
6 Signal/Noise & Distortion
SINAD
at 2-Wire
70
at VX
70
7 Power Supply Rejection Ratio
PSRR
at 2-Wire
25
40
at VX
25
40
8 Transhybrid Loss
THL 16
25
9 2-Wire Input Impedance
Zin
Note 3
Ω
dB
dB
dBm
dBm
dB
dB
dB
dB
dB
Ω
Test circuit (Figure 8)
Input 0.5V at 1kHz
ILOOP = 15-60mA
300Hz to 3400 Hz
THD < 5% @ 1kHz
ILOOP = 25-60mA
VCC = 5V
Input 0.5V at 1kHz
ILOOP = 25-60mA
300-3400Hz
Ripple 0.1Vrms 1kHz on
VDD
Test circuit (Figure 8)
300-3400Hz at VR
@ 1kHz
9
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