MH88510 Просмотр технического описания (PDF) - Mitel Networks
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MH88510 Datasheet PDF : 10 Pages
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Preliminary Information
MH88510/11
AC and DC Loop Electrical Characteristics*
Characteristics
Sym Min Typ‡ Max Units
Test Conditions
1 Maximum AC Ringing
Current Rejection x
44
mA
2 Ring Trip Detect Time
125 ms
3 Operating Loop Current
VBAT = -48V
IIP
VBAT = -23V
18
23
28
mA RLoop < 2000Ω
18
23
28
mA RLoop < 600Ω
4 Maximum Operating Loop
RIP
Resistance y VBAT = -48V
2000
VBAT = -23V
600
Ω
ILoop = 18mA
Ω
ILoop = 18mA
5 Loop Current at
Off-Hook Detect Threshold
ISH
8
10
12
µA VDD = 5.0V, VEE = -5.0V
9
11
13
µA VDD = 7.0V, VEE = -8.0V
* AC and DC Loop 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.
x The SLIC can be loaded with an AC impedance as low as 2200Ω without generating a false SHK output. Since each REN represents 8kΩ,
the SLIC can drive a REN of 3.6 without generating a false SHK output.
y See section on Tip-Ring Drive Circuit for driving longer lines.
AC Electrical Characteristics
Characteristics
1 Return Loss at 2-Wire
Sym
Min Typ‡
20
30
2 Impedance at Junctor
604
3 Longitudinal to Metallic Balance
50
60
4 Longitudinal to Junctor Balance
50
60
5 Signal Output Overload Level
at 2-Wire
3.5
at Junctor
3.5
6 Total Harmonic Distortion
at 2-Wire
at Junctor
THD
7 Idle Channel Noise
Nc
at 2-Wire
at Junctor
8 Power Supply Rejection Ratio at
PSRR
2-Wire and Junctor
VDD
25
VEE
25
VBAT
25
9 Mute Attenuation
30
‡ Typical figures are at 25°C with nominal + 5V supplies and are for design aid only.
Max
1.0
1.0
12
12
Units
dB
Ω
dB
dB
dBm
dBm
%
%
Test Conditions
Reference 600Ω
@ 1kHz
40Hz - 4kHz
40Hz - 4kHz
% THD < 5%
Reference: 600Ω
Reference: 754Ω
Input 0.5V 1kHz
dBrnc
dBrnc
Reference: 600Ω
Reference: 754Ω
Ripple 0.1V 1kHz
dB
dB
dB
dB Input 0.5V MUTE
= 0.0V @1kHz
2-59
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