ST70134A

9/22

Figure 5 : HC Filter Mask for RX

Note: The total RX path (including ADC) group delay distortion is 16

µs (i.e. = 15µs + 1µs of ADC)

Linearity of RX

Linearity of the RX analog path is defined by the IM3 product of two sinusoidal signals with frequencies f1

and f2 and each with 0.5Vpd amplitude (total

≤ 1Vpd) at the output of the RX - AGC amplifier (i.e: before

the ADC) for the case of minimal AGC setting.

Table 7 lists the RX path intermodulation distortion (as S/IM3 ratio) in downstream and upstream band-

width.

Power Supply Rejection

The noise on the power supplies for the RX path must be lower than the following: <50mVrms in band

white noise for any AVDD.

In this case, PSR (power supply rejection) of ST70134 RX path is lower than -43dB.

Table 7 : Linearity of RX

f1 (0.5Vpd)

f2 (0.5Vpd)

300kHz

200kHz

500kHz

400kHz

700kHz

600kHz

S/IM3

(AGC = 0dB)

59.5dB @ 100kHz

53.5dB @ 400kHz

43.5dB @ 700kHz

42.5dB @ 800kHz

59.5dB @ 300kHz

48.0dB @ 600kHz

48.0dB @ 500kHz

42.5dB @ 800kHz

Table 8 : RX Filter to A/D Interface

RX filter to A/D maximal level:

1Vpd = full scale of A/D

Table 9 : A/D Converters

Numbers of bits:

12bits

Minimum resolution of the A/D converter

11bits

Linearity error of the A/D converter

<1LSB (out of 12bits)

Full scale input range:

1 Vpdif ±5%

Sampling rate:

8.832MHz (or 4.416MHz in OSR = 2 mode)

Maximum attenuation at 1.1MHz:

<0.5dB without in-band ripple

Maximum group delay:

<3

µs

Maximum group delay distortion:

<1

µs

5dB 36dB 50dB

±1dB

0dB

30

1104 2208 7728 16560

kHz

Amplitude