AMIS-30585 Datasheet, PDF (13/17 Pages) AMI SEMICONDUCTOR – S-FSK PLC Modem

AMIS−30585
Table 13. RECEIVER EXTERNAL PARAMETERS: Pin RX_IN, RX_OUT, REF_OUT
Parameter
Description
Condition
Min.
Max.
Unit
VOFFS_RX_IN Input offset voltage 42 dB
AGC gain = 42 dB
5
mV
VOFFS_RX_IN Input offset voltage 0 dB
AGC gain = 0 dB
50
mV
V_{MAX_RX_IN}
Max. peak input voltage (corresponding to 62.5%
AGC gain = 0 dB
0.85
1.15
Vp
of the SD full scale)
(Note 16)
NF_{RX_IN}
Input referred noise of the analog receiver path
AGC gain = 42 dB
(Notes 16 and 17)
150
NV/#Hz
I_{LE_RX_IN}
IMax_REF_OUT
Input leakage current of receiver input
Max. current delivered by REF_OUT
−1
1
mA
−300
+300
mA
PSRR_{LPF_OUT}
Power supply rejection ratio of the receiver input
AGC gain = 42 dB
10
dB
section
(Note 18)
35
(Note 19)
AGC_step
AGC gain step
5.7
6.3
dB
AGC_range
AGC range
39.9
44.1
dB
V_{REF_OUT}
Analog ground reference output voltage
1.57
1.73
V
SN_{AD_OUT}
Signal to noise ratio at 62.5% of the SD full scale
(Notes 16 and 20)
54
dB
V_{CLIP_AGC_IN}
Clipping level at the output of the gain stage
1.15
1.65
Vp
16. Input at RX_IN, no other external components.
17. This parameter will be characterized on a limited number of prototypes and will not be tested in production.
18. A sinusoidal signal of 10 kHz and 100 mV ptp is injected between VDDA and VSSA. The signal level at the differential LPF_OUT and
REF_OUT output is measured to determine the parameter.
19. A sinusoidal signal of 50 Hz and 100 mV ptp is injected between VDDA and VSSA. The signal level at the differential LPF_OUT output is
measured to determine the parameter.
20. These parameters will be tested in production with an input signal of 95 kHz and 1 Vp by reading out the digital samples at the point AD_OUT
with the default settings of T_RX_MOD[7], SDMOD_TYP, DEC_TYP, and COR_F_ENA. The AGC gain is switched to 0 dB.
The receive LPF filter + AGC + low noise amplifier must
have a frequency characteristic between the limits listed
below. The absolute output level depends on the operating
condition. In production the measurement will be done for
relative output levels where the 0 dB reference value is
measured at 50 kHz with a signal amplitude of 100 mV.
Table 14. RECEIVER FREQUENCY
CHARACTERISTICS
Frequency (kHx)
Min. (dB)
10
−0.5
95
−1.3
130
−4.5
165
330
660
1000
2000
Max. (dB)
0.5
0.5
−2.0
−3.0
−18.0
−36.0
−50
−50
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