L7554 Datasheet, PDF (13/28 Pages) Agere Systems – L7554 Low-Power SLIC

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