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Receiver External Parameters: Pin RX_IN, RX_OUT, REF_OUT
Table 9. RECEIVER EXTERNAL PARAMETERS
Parameter
Input offset voltage 42 dB
Input offset voltage 0 dB
Max. peak input voltage (corres-
ponding to 62.5% of the SD full
scale)
Input referred noise of the analog
receiver path
Input leakage current of receiver
input
Max. current delivered by
REF_OUT
Power supply rejection ratio of the
receiver input section
AGC gain step
AGC range
Analog ground reference output
voltage
Signal to noise ratio at 62.5 % of
the SD full scale
Clipping level at the output of the
gain stage (RX_OUT)
9. Input at RX_IN, no other external components.
10. Characterization data only. Not tested in production.
11. A sinusoidal signal of 10 kHz and 100 mVpp is injected between VDDA and VSSA. The signal level at the differential LPF_OUT and
REF_OUT output is measured to determine the parameter.
12. A sinusoidal signal of 50 Hz and 100 mVpp is injected between VDDA and VSSA. The signal level at the differential LPF_OUT output is
measured to determine the parameter.
13. 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.
Table 10. RECEIVER FREQUENCY CHARACTERISTICS
Frequency (kHz)
NCN49597
Test Conditions
AGC gain = 42 dB
AGC gain = 0 dB
AGC gain = 0 dB (Note 9)
AGC gain = 42 dB
(Notes 9 and 10)
AGC gain = 42 dB (Note 11)
AGC gain = 42 dB (Note 12)
(Notes 9 and 13)
10
95
130
165
330
660
1000
2000
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Symbol
Min
V
OFFS_RX_IN
V
OFFS_RX_IN
V
0.85
MAX_RX_IN
NF
RX_IN
I
−1
LE_RX_IN
I
−300
Max_REF_OUT
PSRR
10
LPF_OUT
35
AGC
5.7
step
AGC
39.9
range
V
1.52
REF_OUT
SN
54
AD_OUT
V
1.15
CLIP_AGC_IN
Attenuation
Min
−0.5
−1.3
−4.5
11
Typ
Max
Unit
5
mV
50
mV
1.15
Vp
150
nV/ Hz
1
mA
300
mA
dB
6.3
dB
44.1
dB
1.78
V
dB
1.65
Vp
Max
Unit
0.5
dB
0.5
dB
−2.0
dB
−3.0
dB
−18.0
dB
−36.0
dB
−50
dB
−55
dB
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