Datasheet


SLAS357 − DECEMBER 2001
7
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electrical characteristics over recommended ranges of supply voltage and operating free-air temperature
(unless otherwise noted) (continued)
transmit idle channel noise and distortion, companded mode (µ-law) selected
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
Transmit idle channel noise, psophometrically weighted
MIC Amp 1 configured for 23.5-dB gain
(see Note 8)
−80 −70 dBm0
p
MICIN−, MICIN+ to PCMO at 3 dBm0 27
MICIN−, MICIN+ to PCMO at 0 dBm0 30
MICIN−, MICIN+ to PCMO at −5 dBm0 33
Transmit signal-to-distortion ratio with 1.02-kHz sine-wave
MICIN−, MICIN+ to PCMO at −10 dBm0 36
dBm0
Transmit signal-to-distortion ratio with 1.02-kHz sine-wave
input
MICIN−, MICIN+ to PCMO at −20 dBm0 35
dBm0
input
MICIN−, MICIN+ to PCMO at −30 dBm0 26
MICIN−, MICIN+ to PCMO at −40 dBm0 24
MICIN−, MICIN+ to PCMO at −45 dBm0 19
Intermodulation distortion, 2-tone CCITT method, composite
CCITT G.712 (7.1), R2 49
dB
Intermodulation distortion, 2-tone CCITT method, composite
power level, −13 dBm0
CCITT G.712 (7.2), R2 51
dB
NOTE 8: With recommended impedances and resistor tolerance of 1%
transmit idle channel noise and distortion, linear mode selected
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
Transmit idle channel noise, psophometrically weighted
MIC Amp 1 configured for 23.5-dB gain
(see Note 8)
−80 −74 dBm0
p
MICIN−, MICIN+ to PCMO at 3 dBm0 40 55
MICIN−, MICIN+ to PCMO at 0 dBm0 50 61
MICIN−, MICIN+ to PCMO at −5 dBm0 52 62
Transmit signal-to-total distortion ratio with 1.02-kHz
MICIN−, MICIN+ to PCMO at −10 dBm0 56 66
dB
Transmit signal-to-total distortion ratio with 1.02-kHz
sine-wave input
MICIN−, MICIN+ to PCMO at −20 dBm0 52 68
dB
sine-wave input
MICIN−, MICIN+ to PCMO at −30 dBm0 51 61
MICIN−, MICIN+ to PCMO at −40 dBm0 43 59
MICIN−, MICIN+ to PCMO at −45 dBm0 38 55
NOTE 8: With recommended impedances and resistor tolerance of 1%
receive gain and dynamic range, linear or companded (µ-law) mode selected (see Note 9)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
Load = 8 Ω, volume control = −3 dB, PCMI data input to −4 dB level 3.2
Overload-signal level (3 dB)
Load = 16 Ω, volume control = −3 dB, PCMI data input to −2 dB level 4.05
V
pp
Overload-signal level (3 dB)
Load = 32 Ω, volume control = −3 dB, PCMI data input to −1 dB level 4.54
V
pp
Absolute gain error 0 dBm0 input signal, 2.7 V ≤ V
DD
≤ 3.3 V −1 1 dB
Gain error with output level
PCMI to EAROUT−, EAROUT+ at 3 dBm0 to −40 dBm0 −0.5 0.5
Gain error with output level
relative to gain at −10 dBm0
PCMI to EAROUT−, EAROUT+ at −41 dBm0 to −50 dBm0 −1 1
dB
relative to gain at −10 dBm0
PCMI to EAROUT−, EAROUT+ at −51 dBm0 to −55 dBm0 −1.2 1.2
dB
NOTE 9: 1020-Hz input signal at PCMI, output measured differentially between EAROUT− and EAROUT+