MH88628 Просмотр технического описания (PDF) - Mitel Networks
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MH88628 Datasheet PDF : 16 Pages
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Preliminary Information
MH88628
AC Electrical Characteristics‡
Characteristics
1 TX Gain
2 RX Gain
3 Ringing Capability
4 On-Hook Transmission
Signal Input Level
Gain
5 External Signal Output Level
Sym
6 SHK Rise Time
tR
Fall time
tF
7 2-Wire Termination
Impedance
8 Off-Hook Detect Threshold
9 2-Wire Return Loss
10 Longitudinal Balance
Longitundinal to Metallic
11 Longitudinal Current
Capability
12 Idle channel Noise
Rx to T-R NCR
T-R to Tx NCX
13 Transhybrid Loss
THL
14 Unbalanced Detect Threshold IUB
15 Analog Signal Overload Level
At Tip and Ring
16 Ringing Signal Voltage
Min Typ* Max Units
Test Conditions
0
dB externally adjustable
0
dB externally adjustable
5
REN
2.0
6
1.75
2.25
1
1
600/
900
10
20
20
20
Vrms
dB
VBat=-48V
T-R load = 10kΩ min.
Vrms
VBat= -48V, T-R load=
200Ω LCA=0V, Zo-600Ω,
Gain=0dB
ms Dial Pulse Detection
ms
Ω
Selectable
mA
dB 300 to 500Hz
dB 500 to 2500Hz
dB 2500 to 3400Hz
58
dB 200-1000Hz
53
dB 1kHz - 3k4Hz
40
mA 20mA per lead
8
12
22
40
10
90
dBrnC
dBrnC
dB
mA
200-3400Hz
4
dBm T-R=600Ω, VBat=-48V
Vrms
17 Ringing Frequency
17
33
Hz
18 Ring Trip Delay
100
ms
19 Absolute Gain, Variation
+0.1
dB
20 Relative Gain, reference to
1kHz
+0.05
dB
21 Power Supply Rejection Ratio PSRR
dB
VBat
24
VDD
24
VEE
24
* Typical figure are at 25°C with nominal +5V supplies and are for design aid only.
‡ AC Electrical Characteristics are over recommended operating conditions unless otherwise stated.
0dB at T-R, 1kHz
300-3400Hz
1kHz, 100mVpp
Notes:
Impedance set by external network of 600Ω or 900Ω default.
External network for test purposes consists of 2200Ω + 8200Ω // 11.5nF between pins Z1 and Z2, the equivalent Zin has 1/10th the impedance
and is equivalent o 220Ω+820Ω // 115nF.
Test condition uses a Zin value of 600Ω, 900Ω and the above external network.
Test conditions use a transmit and receive gain set to 0dB default and a Zin value of 600Ω unless otherwise stated.
“Ref” indicates reference impedance which is equivalent to the termination impedance.
“Net” indicates network balance impedance.
Refer to Table 1, 2 for TX, RX gain adjustment.
2-203
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