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58
INSERTION LOSS
2-Wire to 4-Wire
0dBm, 1kHz (Note 19, Figure 9)
-0.2
-
0.2
dB
4-Wire to 2-Wire
0dBm, 1kHz (Note 20, Figure 9)
-0.2
-
0.2
dB
GAIN TRACKING (Ref = -10dBm, at 1.0kHz)
2-Wire to 4-Wire
-40dBm to +3dBm (Note 21, Figure 9)
-0.1
-
0.1
dB
2-Wire to 4-Wire
-55dBm to -40dBm (Note 21, Figure 9)
-
±
0.03
-
dB
4-Wire to 2-Wire
-40dBm to +3dBm (Note 22, Figure 9)
-0.1
-
0.1
dB
4-Wire to 2-Wire
-55dBm to -40dBm (Note 22, Figure 9)
-
±
0.03
-
dB
FIGURE 8. CURRENT GAIN-RSN TO METALLIC
FIGURE 9. FREQUENCY RESPONSE, INSERTION LOSS,
GAIN TRACKING AND HARMONIC DISTORTION
NOISE
Idle Channel Noise at 2-Wire
C-Message Weighting (Note 23,
Figure 10)
-
12
-
dBrnC
Idle Channel Noise at 4-Wire
C-Message Weighting (Note 24,
Figure 10)
-
12
-
dBrnC
HARMONIC DISTORTION
2-Wire to 4-Wire
0dBm, 1kHz (Note 25, Figure 7)
-
-65
-54
dB
4-Wire to 2-Wire
0dBm, 0.3kHz to 3.4kHz (Note 26,
Figure 9)
-
-65
-54
dB
BATTERY FEED CHARACTERISTICS
Constant Loop Current Tolerance
R
DCX
= 41.2k
I
L
= 2500/(R
DC1
+ R
DC2
),
-40
o
C to 85
o
C (Note 27)
0.9I
L
I
L
1.1I
L
mA
Loop Current Tolerance (Standby)
I
L
= (V
BAT
-3)/(R
L
+1800),
-40
o
C to 85
o
C (Note 28)
0.8I
L
I
L
1.2I
L
mA
Open Circuit Voltage (V
TIP
- V
RING
)
-40
o
C to 85
o
C, (Active)
14
-
20
V
Electrical Specifications
T
A
= -40
o
C to 85
o
C, V
CC
= 5V
±
5%, V
EE
= -5V
±
5%, V
BAT
= -28V, AGND = BGND = 0V, R
DC1
= R
DC2
=
41.2k
, R
D
= 39k
, R
SG
=
∞
, R
F1
= R
F2
= 0
, C
HP
= 10nF, C
DC
= 1.5
μ
F, Z
L
= 600
, Unless Otherwise
Specified. All pin number references in the figures refer to the 28 lead PLCC package.
(Continued)
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
R
DC2
41.2k
R
DC1
41.2k
C
DC
1.5
μ
F
R
L
600
TIP
27
RING
28
R
DC
14
RSN
16
R
RX
300k
V
RSN
= 0V
V
RSN
= -3V
GRX = ((V
TR1
- V
TR2
)(300k))/(-3)(600)
Where: V
TR1
is the Tip to Ring Voltage with V
RSN
= 0V
and V
TR2
is the Tip to Ring Voltage with V
RSN
= -3V
V
TR
R
T
600k
R
RX
I
DCMET
300k
C
1/
ω
C << R
L
E
G
R
L
V
TX
600
V
TR
E
RX
TIP
27
V
TX
19
RING
28
RSN
16
HC5513