THS1041 Datasheet, PDF (10/37 Pages) Texas Instruments – 10-Bit, 40-MSPS ANALOG-TO-DIGITAL CONVERTER WITH PGA AND CLAMP

THS1041
SLAS289B – OCTOBER 2001 – REVISED FEBRUARY 2002
TYPICAL CHARACTERISTICS
TOTAL HARMONIC DISTORTION
vs
INPUT FREQUENCY
–80
Differential Input = 1 V
–75
–0.5 dB
–70
–6 dB
–65
TOTAL HARMONIC DISTORTION
vs
INPUT FREQUENCY
–80
Differential Input = 2 V
–75
–0.5 dB
–70
–65
–6 dB
–60
–55
–20 dB
–50
–45
–40
0
See Note
10 20 30 40 50 60 70 80
fi – Input Frequency – MHz
Figure 6
90 100
–60
–20 dB
–55
–50
–45
–40
0
See Note
10 20 30 40 50 60 70 80 90 100
fi – Input Frequency – MHz
Figure 7
SIGNAL-TO-NOISE RATIO
vs
INPUT FREQUENCY
61
Diff Input = 2 V
59
SE Input = 2 V
57
55 _{SE Input = 1 V}
Diff Input = 1 V
53
51
49
See Note
47
0 10 20 30 40 50 60 70 80 90 100
fi – Input Frequency – MHz
Figure 8
NOTE: AVDD = DVDD = 3 V,
CLK = 40 MSPS,
Input series resistor = 25 Ω,
2-V Input: Ext Ref, REFT = 2 V, REFB = 1 V
1-V Input: Ext Ref, REFT = 1.75 V, REFB = 1.25 V
PGA = 1,
SPURIOUS FREE DYNAMIC RANGE
vs
INPUT FREQUENCY
85
80
Diff Input = 2 V
75
Diff Input = 1 V
70
65
60
55
50
45
40 ^{SE Input = 2 V}
35 ^{See Note}
SE Input = 1 V
0 10 20 30 40 50 60 70 80 90 100
fi – Input Frequency – MHz
Figure 9
20-pF capacitors AIN+ to AGND and AIN– to AGND,
10
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