Preliminary Information
DC Electrical Characteristics
†
Characteristics
1
2
3
4
5
RVLC
LC
MH88422
Sym
I
DD
PC
V
OL
V
OH
V
IL
V
IH
I
IH
I
IL
Min
Typ
‡
3
15
Max
Units
mA
mW
Test Conditions
V
DD
= -5.0V, Idle state
V
DD
= -5.0V, Idle state
I
OL
= 4mA
I
OH
= 0.4mA
Supply Current
Power Consumption
Low Level Output Voltage
High Level Output Voltage
Low Level Input Voltage
High Level Input Voltage
Low Level Input Current
High Level Input Current
0.4
2.4
0.8
2.0
60
60
V
V
V
V
µΑ
µA
V
IH
= 5.0V
V
IL
= 0.0V
† DC 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.
AC Electrical Characteristics
†
- MH88422 All Variants
Characteristics
1
2
3
4
Input Impedance VR
Output Impedance at VX
Receive Gain (VR to 2-wire)
Sym
Min
Typ
‡
47k
10
3.5
0
0
Max
Units
Ω
Ω
dB
dB
dB
Input 0.5V at 1kHz
300 Hz
3400 Hz
THD <5% @ 1kHz
I
Loop
=15 to 40mA
+2.0
+2.0
THD
at 2-wire
at VX
7
Power Supply Reject Ratio
at 2-wire
at VX
Transhybrid Loss
PSRR
30
30
THL
20
dB
dB
dB
1.2
1.2
%
%
+3.0
+3.0
dBm
dBm
Input -10dB at 1kHz
DC loop = 25mA
V
DD
=5.0V
Ripple 0.1V,1kHz on
V
DD
Input -3.5dBm, 1kHz at
V
R
V
DD
=4.5V to 5.5V
Test Conditions
Frequency Response Gain
(relative to Gain @ 1kHz)
Signal Output Overload Level
5
at 2-Wire
at VX
6
Total Harmonic Distortion
8
† Electrical Characteristics are over Recommended Operating Conditions unless otherwise stated.
‡ Typical figures are at 25°C and are for design aid only.
Note 1: All of the above characteristics use a test circuit as per Figure 3.
Note 2: All of the above test conditions use a test source impedance which matches the device’s impedance.
Note 3: dBm is referenced to 600Ω unless otherwise stated.
2-25
MITEL [ MITEL NETWORKS CORPORATION ]
