MT9092
AC Characteristics† for A/D (Transmit) Path - 0dBm0 = 1.421Vrms for µ-Law and 1.477Vrms for A-Law, at the
CODEC. (VRef = 0.5 volts and VBias = 2.5 volts). All parameters pertain exclusively to the Filter/CODEC except absolute half-channel gain
and transmit idle channel noise.
‡
Characteristics
Sym
Min
Typ
Max
Units
Test Conditions
µ-Law
1
2
Analog input equivalent to
overload decision
ALi3.17
ALi3.14
5.79
6.0
Vp-p
Vp-p
A-Law
Both at CODEC
Absolute half-channel gain.
Transmit filter gain = 0dB setting
GAX1
GAX2
5.4
14.7
6.1
15.4
6.8
16.1
dB
dB
MICA/u=0*
MICA/u=1*
MIC± or M± to PCM
1020Hz
All other transmit filter settings
(1 to 7dB) are in addition to 0dB
setting
GAX1
GAX2
-0.15
-0.15
+0.15
+0.15
dB
dB
MICA/u=0*
MICA/u=1*
from nominal
MIC± or M± to PCM
1020Hz
3
4
Gain tracking vs. input level
CCITT G.714 Method 2
GTX
-0.3
-0.6
-1.6
0.3
0.6
1.6
dB
dB
dB
3 to -40 dBm0
-40 to -50 dBm0
-50 to -55 dBm0
Signal to total Distortion vs.
input level.
CCITT G.714 Method 2
DQX
35
29
24
dB
dB
dB
0 to -30dBm0
-40 dBm0
-45 dBm0
5
6
Transmit Idle Channel Noise
NCX
NPX
15
-72
17.5
-66
dBrnC0 µ-Law
dBrn0p A-Law
Gain relative to gain at 1020Hz
<50 Hz
60 Hz
GRX
-25
-30
0.0
0.25
0.25
-12.5
-25
dB
dB
dB
dB
dB
dB
dB
200 Hz
300-3000 Hz
3000-3400 Hz
4000 Hz
-0.25
-0.9
>4600 Hz
7
8
Absolute Delay
DAX
DDX
360
µs
at frequency of minimum
delay
Group Delay relative to D
750
380
130
750
µs
µs
µs
µs
500-600 Hz
AX
600-1000 Hz
1000-2600 Hz
2600 - 2800 Hz
9
Power Supply Rejection
f=1020 Hz
f=0.3 to 3 kHz
f=3 to 4 kHz
±1000mV
µ-Law
PSSR1-3 not production
tested
peak signal
rms
PSSR
PSSR1
PSSR2
PSSR3
37
40
35
40
dB
dB
dB
dB
f=4 to 50 kHz
† AC Electrical Characteristics are over recommended temperature range & recommended power supply voltages.
‡ Typical figures are at 25°C and are for design aid only: not guaranteed and not subject to production testing.
* Note: MICA/u, refer to General Control Register, address 0Fh.
7-39
MITEL [ MITEL NETWORKS CORPORATION ]
