Si3226/7
Si3208/9
Table 4. AC Characteristics
(VDD = 3.13 to 3.47 V, TA = 0 to 70 ยฐC for F-Grade, โ40 to 85 ยฐC for G-Grade)
Parameter
Test Condition
Min
Typ
Max Unit
TX/RX Performance
Overload Level
Overload Compression
Single Frequency Distortion1
2.5
โ
2-Wire โ PCM
Figure 6
โ
2-Wire โ PCM or PCM โ 2-Wire:
โ
โ
200 Hz to 3.4 kHz
โ
VPK
โ
โ65
dB
PCM โ 2-Wire โ PCM:
200 Hz โ 3.4 kHz,
16-bit Linear mode
โ
โ
โ65
dB
Signal-to-(Noise + Distortion)
Ratio2
200 Hz to 3.4 kHz
D/A or A/D 8-bit
Figure 5
โ
โ
Active off-hook, and OHT, any ZT
Audio Tone Generator Signal-to-
0 dBm0, Active off-hook, and
46
Distortion Ratio2
OHT, any ZT
Intermodulation Distortion
โ
Gain Accuracy2
2-Wire to PCM or PCM to 2-Wire
โ
โ
dB
โ
โ41
dB
1014 Hz, Any gain setting
VDD1 โ VDD4 = 3.3 V ยฑ 5%
โ0.2
โ
0.2
dB
Attenuation Distortion vs. Freq.
Group Delay vs. Frequency
0 dBm 0
See AN317
Gain Tracking3
1014 Hz sine wave,
โ
โ
โ
โ
reference level โ10 dBm
Signal level:
3 dB to โ37 dB
โ
โ
0.25
dB
โ37 dB to โ50 dB
โ
โ
0.5
dB
โ50 dB to โ60 dB
โ
โ
1.0
dB
Round-Trip Group Delay
1014 Hz, Within same time-slot
โ
450
500
ยตs
Crosstalk between channels
TX or RX to TX
TX or RX to RX
2-Wire Return Loss4
Transhybrid Balance4
0 dBm0,
300 Hz to 3.4 kHz
300 Hz to 3.4 kHz
200 Hz to 3.4 kHz
300 Hz to 3.4 kHz
โ
โ
โ75
dB
โ
โ
โ75
dB
26
30
โ
dB
26
30
โ
dB
Idle Channel Noise5
Noise Performance
C-Message weighted
โ
8
12 dBrnC
Psophometric weighted
โ
โ80
โ78 dBmP
PSRR from VDD1โVDD4
RX and TX, dc to 3.4 kHz
40
โ
โ
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 โ10 dBm0. The output signal magnitude at any other frequency is smaller than the maximum value specified.
2. Analog signal measured as VTIP โ VRING. Assumes ideal line impedance matching.
3. The quantization errors inherent in the ยต/A-law companding process can generate slightly worse gain tracking
performance in the signal range of 3 to โ37 dB for signal frequencies that are integer divisors of the 8 kHz PCM
sampling rate.
4. VDD1โVDD4 = 3.3 V, VBAT = โ52 V, no fuse resistors; RL = 600 ฮฉ, ZS = 600 ฮฉ synthesized using RS register
coefficients.
5. The level of any unwanted tones within the bandwidth of 0 to 4 kHz does not exceed โ55 dBm.
6
Preliminary Rev. 0.33