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Table 10. LNA characteristics

RX Filters

The combination of the external filter (an LC ladder filter typically) with the integrated lowpass filter pro-

vides:

– echo reduction to improve dynamic range

– DMT sidelobe and out of band (anti-aliasing) attenuation.

– Anti alias filter (60 dB rejection @ image freq.)

ATU-R-RX filters

The integrated filter characteristics are shown in table 6.

ATU-C-RX Filter

This filter is the same as the one used for ATU-R_TX.

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 0.5 Vpd amplitude (total _1 Vpd) at the output of the RX-AGC amplifier (i.e: before

the ADC) for the case of minimal AGC setting.

Table 11. Integrated filter characteristics ATU-R-RX

Data

Min

Typical

Max

Unity

Input common mode voltage

–

AVDD/2

–

V

Input differential voltage

–

1

–

Vpdiff

Maximum peak input differential voltage

–

1

–

Vpdiff

Output common mode voltage

–

AVDD/2

–

V

Maximum peak output differential voltage

–

1

–

Vpdiff

Amplification step

0.7

1

1.3

dB

Amplification range

0

–

+31

dB

Input refered noise at max gain,

5.5

6.5

8

nV/

√Hz

min atten. (over a 36 kHz to 1.1 MHz band)

Power consumption

–

32

–

mW

Digital interface

–

5

–

bits

Digital code

’00000’

–> 0 dB

amplification

’11111’

–> +31 dB

amplification

Description

Value/Units

Type

4th order butterworth

Cut-off frequency

1.104 MHz (f0)

Max. in-band ripple

0-2 dB