TLC32040M Datasheet, PDF (24/30 Pages) Texas Instruments – ANALOG INTERFACE CIRCUIT

TLC32040M
ANALOG INTERFACE CIRCUIT
TYPICAL CHARACTERISTICS^†
A/D SIGNAL-TO-DISTORTION RATIO
vs
INPUT SIGNAL
80
1-kHz Input Signal With an
ÎÎÎÎÎÎÎÎ _{8-kHz Conversion Rate}
ÎÎÎÎÎÎÎÎ ⁷⁰
Gain = 4X
ÎÎÎÎÎÎÎÎ _{ÎÎÎÎ 60}
Gain = 1X
50
40
30
20
10
0
– 50 – 40 – 3
– 20 – 10
0
10
Input S0ignal Relative to Vref – dB
Figure 8
A/D GAIN TRACKING
(GAIN RELATIVE TO GAIN
AT 0-dB INPUT SIGNAL)
0.5 _{1-kHz Input Signal}
ÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎÎ _{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 9
D/A CONVERTER SIGNAL-TO-DISTORTION RATIO
vs
INPUT SIGNAL
100
1-kHz Input Signal into 600 Ω
ÎÎÎÎÎÎÎÎÎ 90 _{8-kHz Conversion Rate}
ÎÎÎÎÎÎÎÎÎ ₈₀
70
60
50
40
30
20
10
0
– 50 – 40 –30 –20 –10
0
10
Input Signal Relative to Vref – dB
Figure 10
D/A GAIN TRACKING
(GAIN RELATIVE TO GAIN
AT 0-dB INPUT SIGNAL)
1.0
ÎÎÎÎÎÎÎÎÎ ^0.8
1-kHz Input Signal into 600 Ω
8-kHz Conversion Rate
ÎÎÎÎÎÎÎÎÎ _0.6
0.4
0.2
0
– 0.2
– 0.4
– 0.6
– 0.8
–1
– 50 – 40 – 30 – 20 –10
0
10
Input Signal Relative to Vref – dB
Figure 11
4–24
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