THS1040_15 Datasheet, PDF (9/33 Pages) Texas Instruments – CMOS ANALOG-TO-DIGITAL CONVERTER

Not Recommended For New Designs
THS1040
SLAS290C − OCTOBER 2001 − REVISED OCTOBER 2004
TYPICAL CHARACTERISTICS
TOTAL HARMONIC DISTORTION
vs
INPUT FREQUENCY
−80
1-V FS Differential Input Range
−75
−70
−0.5 dBFS
−65
−6 dBFS
−60
−55
−50
−20 dBFS
−45
−40
0
See Note
10 20 30 40 50 60 70 80 90 100 110 120
fi − Input Frequency − MHz
Figure 5
TOTAL HARMONIC DISTORTION
vs
INPUT FREQUENCY
−85
2-V FS Differential Input Range
−80
−75
−0.5 dBFS
−70
−65
−6 dBFS
−60
−20 dBFS
−55
−50
−45
−40
0
See Note
10 20 30 40 50 60 70 80 90 100 110 120
fi − Input Frequency − MHz
Figure 6
SIGNAL-TO-NOISE RATIO
vs
INPUT FREQUENCY
61
Diff Input = 2 V
59
SE Input = 2 V
57
Diff Input = 1 V
55
SPURIOUS FREE DYNAMIC RANGE
vs
INPUT FREQUENCY
82
Diff Input = 2 V
72
Diff Input = 1 V
62
53
SE Input = 1 V
52
51
49
See Note
47
0 10 20 30 40 50 60 70 80 90 100 110 120
fi − Input Frequency − MHz
42
SE Input = 1 V
See Note
SE Input = 2 V
32
0 10 20 30 40 50 60 70 80 90 100 110 120
fi − Input Frequency − MHz
Figure 7
Figure 8
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
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