Si3215
Table 3. AC Characteristics (Continued)
(V
DDA
, V
DDD
= 3.13 to 5.25 V, T
A
= 0 to 70 °C for K-Grade, –40 to 85 °C for B-Grade)
Parameter
2-Wire Return Loss
Transhybrid Balance
Idle Channel Noise
4
Test Condition
200 Hz to 3.4 kHz
300 Hz to 3.4 kHz
Noise Performance
C-Message Weighted
Psophometric Weighted
3 kHz flat
Min
30
30
—
—
—
40
40
40
56
43
53
53
40
Typ
35
—
—
—
—
—
—
—
60
60
60
60
—
Max
—
—
15
–75
18
—
—
—
—
—
—
—
—
Unit
dB
dB
dBrnC
dBmP
dBrn
dB
dB
dB
dB
dB
dB
dB
dB
PSRR from VDDA
PSRR from VDDD
PSRR from VBAT
Longitudinal to Metallic or PCM
Balance
RX and TX, DC to 3.4 kHz
RX and TX, DC to 3.4 kHz
RX and TX, DC to 3.4 kHz
Longitudinal Performance
200 Hz to 3.4 kHz,
β
Q1,Q2
≥
150, 1% mismatch
β
Q1,Q2
=
60 to 240
5
β
Q1,Q2
=
300 to 800
5
Using Si3201
Metallic to Longitudinal Balance
Longitudinal Impedance
200 Hz to 3.4 kHz
200 Hz to 3.4 kHz at TIP or
RING
Register selectable
ETBO/ETBA
00
01
10
Longitudinal Current per Pin
Active off-hook
200 Hz to 3.4 kHz
Register selectable
ETBO/ETBA
—
—
—
33
17
17
—
—
—
Ω
Ω
Ω
00
01
10
—
—
—
4
8
8
—
—
—
mA
mA
mA
Notes:
1.
The input signal level should be 0 dBm0 for frequencies greater than 100 Hz. For 100 Hz and below, the level should be
–10 dBm0. The output signal magnitude at any other frequency will be smaller than the maximum value specified.
2.
Analog signal measured as V
TIP
– V
RING
. Assumes ideal line impedance matching.
3.
The quantization errors inherent in the µ3/A-law companding process can generate slightly worse gain tracking
performance in the signal range of 3 dB to –37 dB for signal frequencies that are integer divisors of the 8 kHz PCM
sampling rate.
4.
The level of any unwanted tones within the bandwidth of 0 to 4 kHz does not exceed –55 dBm.
5.
Assumes normal distribution of betas.
6
Rev. 0.92
SILABS [ SILICON LABORATORIES ]
