STLC1512 查看數據表（PDF） - STMicroelectronics
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STLC1512 Datasheet PDF : 26 Pages
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STLC1512
Table 5. PGA performance Specifications
Input Impedance (over
process)7,8
4.0
5
6.0
kΩ
Measure at pin PGAIN. For all
PGA gains
Input Impedance (over
temperature)7,9
-10%
10%
kΩ
Measure at pin PGAIN. For all
PGA gains
Input Impedance (over process
3.5
5
and temperature)7,10
6.5
kΩ
Measure at pin PGAIN. For all
PGA gains
Input Signal Level @ PGAIN
0
Vcc+0.1 V
Single ended input
Maximum Output Signal Level @
PGAOUT11
1.1
Vpeak
Referenced to RXANG. For
minimum load impedance of
440 Ohms.
Power12
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,
NdB
=
10
log
1--1--0-0--0--0-0--
V
2
n
+G+H
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
00
01
10
11
2 Tone Amplitudes
173 mV
550 mV
1.125 V
1.125 V
Multi-tone RMS
66 mV
207 mV
414 mV
414 mV
Multi-Tone
Amplitudes
9.78 mV
30.7 mV
61.4 mV
61.4 mV
10/26
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