MH88634B
AC Electrical Characteristics
†
Characteristics
1
2
3
2-wire Input Impedance
Return Loss at 2-wire
Longitudinal to Metallic
Balance
Symbol
Zin
RL
20
58
55
53
THL
20
-0.25
-0.3
-2.25
-0.3
29
60
60
58
27
0
0
-2
0
10
5
4.0
1.7
THD
1.0
1.0
NC
at 2-Wire
at TX
12
Power Supply Rejection Ratio
at 2-wire and TX
V
CC
V
EE
On-Hook Gain, 2-Wire to TX
Relative to Off-Hook Gain
Met. to Long. Balance
-2 Variant
-4 Variant
15
Common Mode Rejection
Ratio
CMRR
PSRR
25
25
-1
48
47
0
15
15
16.5
16.5
%
%
0.25
0.3
-1.75
0.3
Min
Typ
‡
600
900
Max
Advance Information
Units
Ω
Test Conditions
-2 Variant
-4 Variant
Test Circuit as Fig 6
200-3400 Hz
Test Circuit as Fig 7
200Hz
1000Hz
3400Hz
200-3400Hz
Test Circuit as Fig 4
1000Hz
200-3400Hz
Test Circuit as Fig 5
1000Hz
200-3400Hz
dB
dB
dB
dB
dB
dB
dB
dB
dB
kΩ
Ω
4
5
Transhybrid Loss
Gain, 2 wire to TX
Relative Gain
6
Gain, Rx to 2 wire
Relative Gain
7
8
9
Input impedance at RX
Output impedance at TX
Signal Overload Level
at 2-wire
at TX
Total Harmonic Distortion
at 2-wire
at TX
% THD < 5% @ 20mA
dBm
dBm
Input 0.5V, 1kHz @
RX
Input 0.5V, 1kHz @
Tip-Ring
10
11
Idle Channel Noise
dBrnC
dBrnC
Ripple 0.1V, 1kHz
dB
dB
dB
13
14
1
Input 1000Hz @ 0.5V
Test Circuit as Fig. 8
60
40
55
40
48
62
48
62
48
55
200-1000Hz
1000-3400Hz
200-1000Hz
1000-3400Hz
dB
Test Circuit as Fig. 7
1000Hz, FL = 0V,
I
Loop
= 25mA
† Electrical Characteristics are over recommended operating conditions unless otherwise stated.
‡ Typical figures are at 25°C with nominal 5V supplies and are or design aid only.
f
2-272
MITEL [ MITEL NETWORKS CORPORATION ]
