Data Sheet
March 1997
L7554 Low-Power SLIC
Test Configurations
VBAT
VCC
0.1 µF
0.1 µF
V
REG
VBAT BGND
V
CC
AGND
VTR
100 Ω
PT
20 kΩ
20 kΩ
SN
XMT
R
LOOP
L7554
XMT
RCV
SLIC
65 kΩ
100 Ω
26 kΩ
PR
RCVN
10 kΩ
DCOUT
RCVP
B0
68.1 kΩ
24.9 kΩ
I
PROG
B1
B2
LCTH
NLC
NRDET
RGDET
CF1
RTSP
RTSN
0.1 µF
0.1 µF
I
CM
CF2
VTX TXI
FB2 FB1
0.1 µF
12-2570 (C)
Figure 4. L7554 Basic Test Circuit
VBAT OR VCC
V
BAT OR VCC
100 Ω
100 Ω
4.7 µF
DISCONNECT
BYPASS CAP
DISCONNECT
BYPASS CAP
4.7 µF
V
S
VS
V
BAT OR
CC
V
BAT OR
V
V
CC
67.5 Ω
PT
PR
TP
PR
+
10 µF
BASIC
TEST CIRCUIT
BASIC
TEST CIRCUIT
900 Ω
V
T/R
–
67.5 Ω
56.3 Ω
+
V
–
M
10 µF
VS
VS
PSRR = 20 log
---------
PSRR = 20 log
------
VT/R
VM
12-2335.a (C)
12-2336.a (C)
Figure 5. Metallic PSRR
Figure 6. Longitudinal PSRR
12
Lucent Technologies Inc.
AGERE [ AGERE SYSTEMS ]
