TLC32044C_11 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 V_ref − 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 V_ref − 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 V_ref − dB
Figure 22
A/D SECOND HARMONIC DISTORTION
vs
INPUT-SIGNAL LEVEL
− 100
1-kHz Input Signal
−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 V_ref − dB
Figure 23
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