¡ Semiconductor
MSM7540/7560
AC Characteristics (Continued)
(VDD = 4.5 V to 5.5 V, Ta = –25°C to +70°C)
Condition
Parameter
Symbol Freq.
(Hz)
Level
(dBm0)
Min.
Others
Typ.
Max. Unit
Idle Channel Noise
NIDLT
—
NIDLR
—
AIN = SG (*1) —
(*1)
—
—
(*2)
–69
—
(–72) dBm0p
–72 (dBmp)
—
(–75)
Absolute Signal
Amplitude
AVT
1020
AVR
0.548
GSX2 0.488
0.615 Vrms
(*3)
0
0.548
VFRO 0.488
0.615 Vrms
(*3)
Power Supply Noise
PSRRT Noise Freq. Noise Level
—
30
—
—
dB
Rejection Ratio
PSRRR : 0 to 50 kHz : 50 mVPP
30
—
—
dB
tSDX
50
—
200 ns
Digital Output
Delay Time
tSDR
1 LSTTL + 100 pF,
50
—
200 ns
tXD1
—
—
50
Pull-up: 500 W
—
200 ns
tXD2
50
—
200 ns
tXD3
50
—
200 ns
*1 Use the P-message weighted filter
*2 PCMRI input code "11010101"(MSM7540)
"11111111"(MSM7560)
*3 0.548 Vrms = 0 dBm0= –3 dBm
Note: All ADPCM coder and decoder characteristics comply with ITU-T Recommendation
G.721.
12/15