Data Sheet
March 1997
L7554 Low-Power SLIC
Test Configurations
(continued)
I
LONG
100 µF
PT
V
S
368
Ω
368
Ω
+
V
PT
PT
+
V
M
BASIC
TEST CIRCUIT
PR
I
LONG
–
–
V
PR
BASIC
TEST CIRCUIT
–
100 µF
+
PR
V
S
LONGITUDINAL BALANCE = 20 log
------
-
V
M
12-2584 (C)
Z
LONG
=
∆
V
PR
∆
V
PT
OR
∆
I
LONG
∆
I
LONG
12-2585 (C)
Figure 7. Longitudinal Balance
Figure 9. Longitudinal Impedance
0.01 µF
50
Ω
600
Ω
82.5
Ω
1
6,7
PT
2
LB1201
4
PT
BASIC
TEST CIRCUIT
PR
XMT
BASIC
TEST CIRCUIT
V
S
0.01 µF
2.15
µF
82.5
Ω
V
BAT
+
600
Ω
V
T/R
–
PR
RCV
V
S
HP4935A
TIMS
V
S
= 0.5 Vrms 30% AM 1 kHz MODULATION,
f = 500 kHz––1 MHz
DEVICE IN POWERUP MODE, 600
Ω
TERMINATION
12-2586 (C)
V
XMT
G
XMT
= V
T/R
G
RCV
=
V
T/R
V
RCV
12-2587 (C)
Figure 8. RFI Rejection
Figure 10. ac Gains
Lucent Technologies Inc.
13
AGERE [ AGERE SYSTEMS ]
