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