TLC32044C Datasheet, PDF (36/39 Pages) Texas Instruments – VOICE-BAND ANALOG INTERFACE CIRCUITS

TLC32044C, TLC32044E, TLC32044I, TLC32044M, TLC32045C, TLC32045I
VOICE-BAND ANALOG INTERFACE CIRCUITS
SLAS017F – MARCH 1988 – REVISED MAY 1995
TYPICAL CHARACTERISTICS
A/D GAIN TRACKING
(GAIN RELATIVE TO GAIN
AT 0-dB INPUT-SIGNAL LEVEL)
0.5
1-kHz Input Signal
0.4 _{8-kHz Conversion Rate}
0.3
0.2
0.1
0
– 0.1
– 0.2
– 0.3
– 0.4
– 0.5
– 50 – 40 – 30 – 20
–10
0
10
Input Signal Relative to Vref – dB
Figure 20
D/A CONVERTER SIGNAL-TO-DISTORTION RATIO
vs
INPUT-SIGNAL LEVEL
100
1-kHz Input Signal into 600 Ω
90 _{8-kHz Conversion Rate}
80
70
60
50
40
30
20
10
0
– 50 – 40 – 30 – 20 –10
0
10
Input Signal Relative to Vref – dB
Figure 21
D/A GAIN TRACKING
(GAIN RELATIVE TO GAIN
AT 0-dB INPUT-SIGNAL LEVEL)
0.5
1-kHz Input Signal into 600 Ω
0.4 _{8-kHz Conversion Rate}
0.3
0.2
0.1
0
– 0.1
– 0.2
– 0.3
– 0.4
– 0.5
– 50 – 40 – 30 – 20
–10
0
10
Input Signal Relative to Vref – dB
Figure 22
A/D SECOND HARMONIC DISTORTION
vs
INPUT-SIGNAL LEVEL
– 100
– 90
1-kHz Input Signal
8-kHz Conversion Rate
– 80
– 70
– 60
– 50
– 40
– 30
– 20
– 10
0
– 50 – 40 – 30 – 20
–10
0
10
Input Signal Relative to Vref – dB
Figure 23
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