Si3216
Rev. 1.0
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Table 4. AC Characteristics—Narrowband Audio Mode
(VDDA, VDDD = 3.13 to 5.25 V, TA = 0 to 70 °C for K-Grade, –40 to 85 °C for B-Grade)
Parameter
Test Condition
Min
Typ
Max
Unit
TX/RX Performance—Narrowband Audio Mode
Overload Level
THD = 1.5%
2.5
—
VPK
Single Frequency Distortion1
2-wire – PCM or
PCM – 2-wire:
200 Hz–3.4 kHz
——
–45
dB
Signal-to-(Noise + Distortion) Ratio2
200 Hz–3.4 kHz
D/A or A/D 16-bit
Active off-hook and OHT,
any Zac
—
Audio Tone Generator
Signal-to-Distortion Ratio2
0 dBm0, Active off-hook and
OHT, any Zac
45
—
dB
Intermodulation Distortion
—
–41
dB
Gain Accuracy2
2-wire to PCM, 1014 Hz
–0.5
0
0.5
dB
PCM to 2-wire, 1014 Hz
–0.5
0
0.5
dB
Gain Accuracy Over Frequency
—
Group Delay Over Frequency
—
Gain Tracking3
1014 Hz sine wave, refer-
ence level –10 dBm
signal level:
3 dB to –37 dB
–0.25
—
0.25
dB
–37 dB to –50 dB
–0.5
—
0.5
dB
–50 dB to –60 dB
–1.0
—
1.0
dB
Round-Trip Group Delay
at 1000 Hz
—
1100
—
s
Gain Step Accuracy
–6 dB to 6 dB
–0.017
—
0.017
dB
Gain Variation with Temperature
All gain settings
–0.25
—
0.25
dB
Gain Variation with Supply
VDDA =VDDA = 3.3/5 V ±5%
–0.1
—
0.1
dB
2-Wire Return Loss
200 Hz–3.4 kHz
30
35
—
dB
Transhybrid Balance
200 Hz–3.4 kHz
30
—
dB
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 VTIP – VRING. Assumes ideal line impedance matching.
3. The quantization errors inherent in the /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.