THS1040_15 Datasheet, PDF (10/33 Pages) Texas Instruments – CMOS ANALOG-TO-DIGITAL CONVERTER

THS1040
Not Recommended For New Designs
SLAS290C − OCTOBER 2001 − REVISED OCTOBER 2004
TYPICAL CHARACTERISTICS
SIGNAL-TO-NOISE PLUS DISTORTION
vs
INPUT FREQUENCY
TOTAL HARMONIC DISTORTION
vs
INPUT FREQUENCY
Diff Input = 2 V
−82
Diff Input = 2 V
57
Diff Input = 1 V
Diff Input = 1 V
−72
52
47
−62
42
SE Input = 1 V
−52
37
SE Input = 2 V
See Note
32
0 10 20 30 40 50 60 70 80 90 100 110 120
fi − Input Frequency − MHz
−42
−32
0
SE Input = 1 V
See Note
SE Input = 2 V
10 20 30 40 50 60 70 80 90 100 110 120
fi − Input Frequency − MHz
Figure 9
Figure 10
NOTE: AVDD = DVDD = 3 V, fS = 40 MSPS, 20-pF capacitors AIN+ to AGND and AIN− to AGND,
Input series resistor = 25 Ω,
2-V Input: Ext Ref, REFT = 2 V, REFB = 1 V, −0.5 dBFS
1-V Input: Ext Ref, REFT = 1.75 V, REFB = 1.25 V, −0.5 dBFS
TOTAL HARMONIC DISTORTION
vs
SAMPLE RATE
SIGNAL-TO-NOISE RATIO
vs
SAMPLE RATE
−75
75
−70
70
−65
65
−60
60
−55
55
−50
50
−45
Diff Input = 2 V
−40
fi = 20 MHz, −0.5 dBFS
0 5 10 15 20 25 30 35 40 45 50 55
Sample Rate − MSPS
Figure 11
45
Diff Input = 2 V
fi = 20 MHz, −0.5 dBFS
40
0 5 10 15 20 25 30 35 40 45 50 55
Sample Rate − MSPS
Figure 12
10
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