STLC1512

10/26

Input Impedance (over

4.0

5

6.0

k

Ω

Measure at pin PGAIN. For all

PGA gains

Input Impedance (over

-10%

10%

k

Ω

Measure at pin PGAIN. For all

PGA gains

Input Impedance (over process

3.5

5

6.5

k

Ω

Measure at pin PGAIN. For all

PGA gains

Input Signal Level @ PGAIN

0

V

Single ended input

Maximum Output Signal Level @

1.1

Vpeak

Referenced to RXANG. For

minimum load impedance of

440 Ohms.

19

mW

Active Power

<1>

The absolute gain test should be done at 30kHz, 75kHz and 120kHz with maximum output signal level of 1.1Vp.

<2>

The calculation to show how to determine the gain from the line is given in Appendix A. This appendix also shows how to cal

culate the gain variations in the application

<3>

These are chip specs only. The application specs are calculated in Appendix A.

<4>

Two tone distortion is measured with two sine waves having an amplitude given in 6. Tone one is at f1=500kHz and tone two

is at f2=300kHz, IM2 appears at 200kHz and IM3 appears ar 100kHz.

<5>

A multi-tone sine wave is used for the DS (Down Stream) Multi-tone test. (The multi-tone signal will be 91 sine waves equally

spaced from 35x4.3125kHz to 125x4.3125kHz with a peak-to-rms ratio of 5.3 and an rms voltage given in Table 6. The multi-

tone test measures the difference between the rms voltage of a single tone at the output to the rms voltage of the maximum

distortion product at the output in the frequency band between 30kHz to 120kHz.

<6>

This is the noise referred to the PGA input pin PGAIN. The input noise can be referenced to tip and ring in dBm/Hz through the

formula,

where NdB is the line noise in dBm/Hz, Vn is the input referred voltage noise of the PGA, H is the hybrid loss (9.54dB) and G

is the gain from the hybrid output to the input of the PGA. See Appendix A for calculation of G. Appendix B shows plots of the

noise performance of the entire receive path as shown in Figure 9.

<7>

These numbers are required to determine the gain variations in the application.

<8>

The input impedance specified here is the nominal value and the variation is due only to processing.

<9>

The input impedance specified here is the nominal value and the variation is due only to temperature. This variation is specified

from the nominal value at 27°C.

<10> The input impedance specified here is the nominal value with the variation due to both process and temperature.

<11> This spec is guaranteed by the distortion test.

<12> This power can not be verified independently. It can only be measured as part of the power from the RXVCC supply.

Table 6. Multi-tone sine waves

Gain Setting

2 Tone Amplitudes

Multi-tone RMS

Multi-Tone

Amplitudes

00

173 mV

66 mV

9.78 mV

01

550 mV

207 mV

30.7 mV

10

1.125 V

414 mV

61.4 mV

11

1.125 V

414 mV

61.4 mV

Table 5. PGA performance Specifications

N

dB

10

100

1000

-------------

V

n

2





log

G

H

++

=