THS1041 Datasheet, PDF (11/37 Pages) Texas Instruments – 10-Bit, 40-MSPS ANALOG-TO-DIGITAL CONVERTER WITH PGA AND CLAMP

THS1041
SLAS289B – OCTOBER 2001 – REVISED FEBRUARY 2002
TYPICAL CHARACTERISTICS
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,
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,
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
SE Input = 2 V
–35
0 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 dB
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 dB
40
0 5 10 15 20 25 30 35 40 45 50
Sample Rate – MSPS
Figure 13
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