Preliminary Information
MH88622
AC Electrical Characteristics*
Characteristics
Sym Min‡ Typ† Max‡ Units
Test Comments
1 Gain VR to 2-Wire
Gain relative to Gain @ 1kHz
2 Gain 2-wire to VX
Gain relative to Gain @ 1kHz
3 Off-Hook Detect Threshold
4 Transhybrid Loss
5 Ringing Signal Voltage
-0.2
-6.2
THL 22
40
6 Ringing Frequency
17
7 Ringing Capability
4
8 Power Supply Rejection Ratio
PSRR
VBat
VDD/VEE
VDCRI
9 2-wire Return Loss
20
10 Longitudinal to Metallic Balance
-1 Variant
40
55
53
-2 Variant
58
53
-3 Variant
46
-5 Variant
40
46
Metallic to Longitudinal Balance
-2 Variant only
60
40
11 Input AC Impedance (2- wire)
ZIN
-1 variant (220Ω + 820Ω // 115nF)
-2 variant (600Ω)
-3 variant (370Ω + 620Ω // 310nF)
-5 variant (200Ω + 680Ω // 100nF)
12 Input Impedance @ VR
13 Output Impedance @ VR
14 Total Harmonic Distortion
THD
at VX
at Tip & Ring
15 Common Mode Rejection
Ratio 2-Wire to VX
CMRR 40
16 Idle Channel Noise
NC
at VX
at 2-wire
0
+0.15
-6
+0.15
7.5
30
30
30
30
35
600
900
700
823
230
10
0.2
0.2
60
15
15
+0.2
-5.8
68
dB Input 1.0Vrms 1kHz @ VR,
Zload = Zin
300-3.4kHz
dB Input 3dBm 1kHz @ 2W
Zsource = Zin
300-3.4kHz
mA
dB 300-3.4kHz
Vrms Min 65Vdc differential between
DCRI & VBAT
Hz See Table 1
REN 1750Ω impedance @ 20Hz min.
dB Ripple
0.1 VPP 1kHz
dB Input 0.5 Vrms 1kHz across Tip
& Ring Zload = Zin
Input 0.5Vrms
dB 50-300Hz
dB 300-1000Hz
dB 1k-4kHz
dB 200Hz to 1kHz
dB 3kHz
dB 300Hz to 3k4Hz
dB 300Hz to 600Hz
dB 600Hz to 3k4Hz
dB 200Hz to 1kHz
dB 1kHz to 4kHz
Ω 1kHz @ 2-wire
kΩ
Ω
% Input 4dBm @2-Wire
% Input 1V at VR
dB Input 0,5V, 1kHz
dBrn
C
17 On-Hook Transmission Signal
Input Level Gain
18 External Signal Output Level
6
1.75 2.2
2.0 Vrms VBat = -48V
dB T-R load = 10kΩ min.
Vrms VBat = -48V
T-R load = 200Ω
2-177