TLV320AIC22
DUAL VOIP CODEC
SLAS281B – JULY 2000 – REVISED JUNE 2002
8
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
ADC channel passband frequency characteristics with line input selected
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
–10 dBr input signal, LNIN selected,
G(
)
300 Hz to 3 kHz
–0.3
0.3
Gain relative to gain at 1.02 kHz
(see Note 6)
PGA gain = 0 dB (see Note 5)
Sampling rate = 8 kHz
3.3 kHz
–0.4
0.2
dB
(see Note 6)
Sam ling rate = 8 kHz
Pole select = 64, 32, 21.3, or 16 kHz
3.4 kHz
–1
–0.1
–9 dBr input signal, LNIN selected,
G(
)
600 Hz to 6 kHz
–0.7
0.3
PGA gain = 0 dB (see Note 5)
Sampling rate = 16 kHz
6.6 kHz
–0.9
0.2
dB
Gain relative to gain at 1.02 kHz
Sam ling rate = 16 kHz
Pole select = 64, 32, or 21.3 kHz
6.8 kHz
–1.5
–0.1
g
(see Note 7)
–21 dBr input signal, LNIN selected,
PGA
i
0 dB (
N t 5)
600 Hz to 6 kHz
–0.9
0.3
PGA gain = 0 dB (see Note 5)
Sampling rate = 16 kHz
6.6 kHz
–1.5
0.15
dB
Sam ling rate = 16 kHz
Pole select = 16 kHz
6.8 kHz
–2.5
0
NOTES:
5. The filter gain outside of the passband is measured with respect to the gain at 1020 Hz. The analog input test signal is a sine wave
with 0 dBr = 4 VI(PP) differential as the reference level for ADC analog input signal.
6. When the high-pass filter is bypassed, the passband is 0 Hz to 3 kHz. When the high-pass filter is inserted, the passband is 300 Hz
to 3 kHz.
7. When the high-pass filter is bypassed, the passband is 0 kHz to 6 kHz. When the high-pass filter is inserted, the passband is 600 Hz
to 6 kHz.
ADC dynamic performance characteristics (see Note 5 and Note 8)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
THD
–72
VI = –3 dBr, PGA gain = 0 dB, Sampling rate = 8 kHz
SNR
–70
dB
THD+N
–68
ADC d
i
f
ith
THD
–72
ADC dynamic performance with
line input selected
VI = –9 dBr, PGA gain = 0 dB, Sampling rate = 8 kHz
SNR
–70
dB
line in ut selected
THD+N
–68
THD
–45
VI = –40 dBr, PGA Gain = 0 dB, Sampling rate = 8 kHz SNR
–40
dB
THD+N
–38
V
35 dB
P
i
32 dB PGA
i
0 dB
THD
–72
VI = –35 dBr, Preamp gain = 32 dB, PGA gain = 0 dB,
Sampling rate = 16 kHz (–3 dBr at ADC input)
SNR
–70
dB
Sam ling rate = 16 kHz (–3 dBr at ADC in ut)
THD+N
–68
ADC d
i
f
ith
V
41 dB
P
i
32 dB PGA
i
0 dB
THD
–70
ADC dynamic performance with
microphone input selected
VI = –41 dBr, Preamp gain = 32 dB, PGA gain = 0 dB,
Sampling rate = 16 kHz (–9 dBr at ADC input)
SNR
–68
dB
micro hone in ut selected
Sam ling rate = 16 kHz (–9 dBr at ADC in ut)
THD+N
–65
V
45 dB
P
i
42 dB PGA
i
0 dB
THD
–70
VI = –45 dBr, Preamp gain = 42 dB, PGA gain = 0 dB,
Sampling rate = 16 kHz (–3 dBr at ADC input)
SNR
–62
dB
Sam ling rate = 16 kHz (–3 dBr at ADC in ut)
THD+N
–60
NOTES:
5. The filter gain outside of the passband is measured with respect to the gain at 1020 Hz. The analog input test signal is a sine wave
with 0 dBr = 4 VI(PP) differential as the reference level for ADC analog input signal.
8. The test condition is a 1020-Hz input signal with an 8-kHz conversion rate. Input and output common mode is 1.5 V.