Advance Information
Variations from Standard Loop Electrical Characteristics
(MH88437AD-PI/MH88437AS-PI) (+70˚C to +85˚C)
Characteristics
1
Operating Loop Current
Sym
Min
16
Typ
Max
60
80
Units
mA
mA
MH88437-P
)
Test Conditions
CL\=0
CL\=1
DC Electrical Characteristics
†
Characteristics
1
2
3
RV,
LCD
LC
Supply Current
Low Level Output Voltage
High Level Output Voltage
Low Level Input Voltage
High Level Input Voltage
Low Level Input Current
High Level Input Current
DC common mode
Sym
I
CC
V
OL
V
OH
V
IL
V
IH
I
IL
I
IH
VCM
2.4
0.8
2.0
0
350
0
2
60
400
VCC
Min
Typ
‡
5
0.4
Max
Units
mA
V
V
V
V
µA
µA
VDC
Test Conditions
V
DD
(= 5.0V, On-hook)
I
OL
= 4mA
I
OH
= 0.4mA
V
IL
= 0.0V
V
IH
= 5.0V
Use coupling caps for
higher voltages and single
ended
4
VR+
VR-
† 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
†
Characteristics
1
Input Impedance
VR-
VR+
2
3
4
5
Output Impedance at VX
Receive Gain (VR to 2-Wire)
Frequency Response Gain
(relative to Gain @ 1kHz)
Signal Output Overload Level
at 2-Wire
at VX
Signal/Noise & Distortion
at 2-Wire
at VX
Power Supply Rejection Ratio
at 2-Wire
at VX
Transhybrid Loss
2-Wire Input Impedance
SINAD
70
70
PSRR
25
25
THL
Zin
16
40
40
25
Note 3
dB
dB
dB
Ω
dB
dB
-1
-0.5
10
0
0
1
0.5
Ω
Sym
Min
Typ
‡
47k
94k
Max
Units
Ω
Ω
Test Conditions
dB
dB
Test circuit (Figure 8)
Input 0.5V at 1kHz
ILOOP = 15-60mA
300Hz to 3400 Hz
THD < 5% @ 1kHz
I
LOOP
= 25-60mA
VCC = 5V
Input 0.5V at 1kHz
0
0
dBm
dBm
6
I
LOOP
= 25-60mA
300-3400Hz
Ripple 0.1Vrms 1kHz on
V
DD
Test circuit (Figure 8)
300-3400Hz at V
R
@ 1kHz
7
8
9
9
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