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| ADS8201 Datasheet, PDF (9/33 Pages) Texas Instruments – 2.2V to 5.5V,Low-Power, 12-Bit, 100kSPS, 8-Channel Data Acquisition System with PGA and SPI™ Interface | |||
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ADS8201
www.ti.com
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SLAS534B â JULY 2009 â REVISED MAY 2010
TYPICAL CHARACTERISTICS (continued)
EFFECTIVE NUMBER OF BITS
vs INPUT FREQUENCY
TA = +25°C
fSAMPLE = 91kHz
SIGNAL-TO-NOISE + DISTORTION
vs INPUT FREQUENCY
80
TA = +25°C
fSAMPLE = 91kHz
70
VDD = 2.2V, VREF = 2.048V
VDD = 5V, VREF = 4.9V
2 3 4 5 6 7 8 9 10
Input Frequency (kHz)
Figure 16.
60
VDD = 2.2V, VREF = 2.048V
50
VDD = 5V, VREF = 4.9V
40
1 2 3 4 5 6 7 8 9 10
Input Frequency (kHz)
Figure 17.
TOTAL HARMONIC DISTORTION
vs INPUT FREQUENCY
-60
TA = +25°C
fSAMPLE = 91kHz
VDD = 2.2V, VREF = 2.048V
-70
-80
VDD = 5V, VREF = 4.9V
-90
1 2 3 4 5 6 7 8 9 10
Input Frequency (kHz)
Figure 18.
CROSSTALK
vs INPUT FREQUENCY
115
TA = +25°C
fSAMPLE = 91kHz
105
95
VDD = 2.2V, VREF = 2.048V
85
VDD = 5V, VREF = 4.9V
75
1 2 3 4 5 6 7 8 9 10
Input Frequency (kHz)
Figure 19.
OUTPUT CODE HISTOGRAM FOR A DC INPUT
6000
5000
4000
5326
8192 Conversions with
VIN = 2.5V at 5V Supply
VREF = 4.096V
fSAMPLE = 91kHz
3000
2812
2000
1000
0
2
2081
52
0
2082 2083 2084 2085
Input Frequency (kHz)
Figure 20.
0
2086
OUTPUT CODE HISTOGRAM FOR A DC INPUT
4500
4000
3500
3000
2500
8192 Conversions
with VIN = 1.024V at
2.2V Supply,
VREF = 2.048V,
fSAMPLE = 91kHz
4237
3791
2000
1500
1000
500
0
0
4
50
109
1
2037 2038 2039 2040 2041 2042 2043
Code
Figure 21.
Copyright © 2009â2010, Texas Instruments Incorporated
Product Folder Link(s): ADS8201
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