B&B Electronics RS-232 to Ethernet Converter ES1A Specifikace Strana 10

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Si3216
10 Rev. 1.0
Not Recommended
f
o
r N
e
w
D
e
si
g
n
s
Noise Performance—Narrowband Audio Mode
Idle Channel Noise
4
C-Message Weighted 15 dBrnC
Psophometric Weighted –75 dBmP
3kHz flat 18 dBrn
PSRR from VDDA RX and TX, DC to 3.4 kHz 40 dB
PSRR from V
DDD
RX and TX, DC to 3.4 kHz 40 dB
PSRR from V
BAT
RX and TX, DC to 3.4 kHz 40 dB
Longitudinal Performance—Narrowband Audio Mode
Longitudinal to Metallic or PCM
Balance
200Hz3.4kHz,
Q1,Q2
150, 1% mismatch
—60dB
Q1,Q2
60 to 240
5
—60dB
Q1,Q2
300 to 800
5
—60dB
Using Si3201 60 dB
Metallic to Longitudinal Balance 200 Hz–3.4 kHz 40 dB
Longitudinal Impedance 200 Hz–3.4 kHz
at TIP or RING
Register selectable
ETBO/ETBA
00
01
10
33
17
17
Longitudinal Current per Pin Active off-hook
200 Hz–3.4 kHz
Register selectable
ETBO/ETBA
00
01
10
4
8
8
mA
mA
mA
Table 4. AC Characteristics—Narrowband Audio Mode (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 Test Condition Min Typ Max Unit
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 µ/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.
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