TWL1102
VOICE-BAND AUDIO PROCESSOR (VBAP
)
SLVS264 – NOVEMBER 1999
8
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
electrical characteristics at 2.7 V and 25
° C (unless otherwise noted) (continued)
transmit gain and dynamic range, companded mode (
-law or A-law) or linear mode selected, transmit slope
filter bypassed (see Notes 7 and 8)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Transmit reference-signal level (0dB)
Differential
175
mVpp
Overload signal level (3 dBm0)
Differential, normal mode
248
mVpp
Overload-signal level (3 dBm0)
Differential, extended mode
63
mVpp
Absolute gain error
0 dBm0 input signal, VDD = 2.7 V (minimum)
–1
1
dB
Gi
ith i
t l
l
lti
t
i
t
MIC1N, MIC1P to PCMO at 3 dBm0 to –30 dBm0
– 0.5
0.5
Gain error with input level relative to gain at
–10 dBm0 MIC1N MIC1P to PCMO
MIC1N, MIC1P to PCMO at –31 dBm0 to –45 dBm0
–1
1
dB
–10 dBm0 MIC1N, MIC1P to PCMO
MIC1N, MIC1P to PCMO at –46 dBm0 to –55 dBm0
–1.2
1.2
dB
NOTES:
7. Unless otherwise noted, the analog input is 0 dB, 1020-Hz sine wave, where 0 dB is defined as the zero-reference point of the channel
under test.
8. The reference signal level, which is input to the transmit channel, is defined as a value 3 dB below the full-scale value of 88-mVrms.
transmit gain and dynamic range, companded mode (
-law or A-law) or linear mode selected, transmit slope
filter enabled (see Notes 9 and 10)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Transmit reference-signal level (0dB)
Differential
175
mVpp
Overload signal level (3 dBm0)
Differential, normal mode
248
mVpp
Overload-signal level (3 dBm0)
Differential, extended mode
63
mVpp
Absolute gain error
0 dBm0 input signal, VDD = 2.7 V (minimum)
–1
1
dB
Gi
ith i
t l
l
lti
t
i
t
MIC1N, MIC1P to PCMO at 3 dBm0 to –30 dBm0
–0.5
0.5
Gain error with input level relative to gain at
–10 dBm0 MIC1N MIC1P to PCMO
MIC1N, MIC1P to PCMO at –31 dBm0 to –45 dBm0
–1
1
dB
–10 dBm0 MIC1N, MIC1P to PCMO
MIC1N, MIC1P to PCMO at –46 dBm0 to –55 dBm0
–1.2
1.2
dB
NOTES:
9. Unless otherwise noted, the analog input is 0 dB, 1020-Hz sine wave, where 0 dB is defined as the zero-reference point of the channel
under test.
10. The reference signal level, which is input to the transmit channel, is defined as a value 3 dB below the full-scale value of 88-mVrms.
transmit filter transfer, companded mode (
-law or A-law) or linear mode selected, transmit slope filter
bypassed, external high pass filter bypassed (MCLK = 2.048 MHz)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
fMIC1 or fMIC2 <100 Hz
–0.5
0.5
fMIC1 or fMIC2 = 200 Hz
–0.5
0.5
G i
l ti
t i
l
i
t 1020 H
i t
l hi h
fMIC1 or fMIC2 = 300 Hz to 3 kHz
–0.5
0.5
Gain relative to input signal gain at 1020 Hz, internal high-pass
filter disabled
fMIC1 or fMIC2 = 3.4 kHz
–1.5
0
dB
filter disabled.
fMIC1 or fMIC2 = 4 kHz
–14
dB
fMIC1 or fMIC2 = 4.6 kHz
–35
fMIC1 or fMIC2 = 8 k Hz
–47
Gain relative to input signal gain at 1020 Hz, internal high-pass
fMIC1 or fMIC2 <100 Hz
–15
dB
Gain relative to in ut signal gain at 1020 Hz, internal high ass
filter enabled.
fMIC1 or fMIC2 = 200 Hz
–5
dB