THS1041_15 Datasheet, PDF (11/42 Pages) Texas Instruments – 10-Bit, 40-MSPS ANALOG-TO-DIGITAL CONVERTER WITH PGA AND CLAMP

THS1041
SLAS289C − OCTOBER 2001 − REVISED OCTOBER 2004
TYPICAL CHARACTERISTICS
SIGNAL-TO-NOISE PLUS DISTORTION
vs
INPUT FREQUENCY
65
Diff Input = 2 V
60
Diff Input = 1 V
55
50
45
SE Input = 1 V
40
See Note
SE Input = 2 V
35
0 10 20 30 40 50 60 70 80 90 100
fi − Input Frequency − MHz
Figure 10
NOTE: AVDD = DVDD = 3 V,
fS = 40 MSPS,
Input series resistor = 25 Ω,
PGA = 1,
2-V Input: Ext Ref, REFT = 2 V, REFB = 1 V
1-V Input: Ext Ref, REFT = 1.75 V, REFB = 1.25 V
TOTAL HARMONIC DISTORTION
vs
INPUT FREQUENCY
−85
Diff Input = 2 V
−80
See Note
−75
Diff Input = 1 V
−70
−65
−60
−55
−50
−45 ^{SE Input = 1 V}
−40
−35
0
SE Input = 2 V
10 20 30 40 50 60 70 80 90 100
fi − Input Frequency − MHz
Figure 11
20-pF capacitors AIN+ to AGND and AIN− to AGND,
TOTAL HARMONIC DISTORTION
vs
SAMPLE RATE
−75
SIGNAL-TO-NOISE RATIO
vs
SAMPLE RATE
75
−70
70
−65
65
−60
60
−55
−50
−45
−40
0
Diff Input = 2 V
fi = 20 MHz, −0.5 dBFS
5 10 15 20 25 30 35 40 45 50
Sample Rate − MSPS
Figure 12
55
50
45
Diff Input = 2 V
fi = 20 MHz, −0.5 dBFS
40
0 5 10 15 20 25 30 35 40 45 50
Sample Rate − MSPS
Figure 13
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