Datasheet

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ADS820
6
SBAS037B
TYPICAL CHARACTERISTICS (Cont.)
At T
A
= +25°C, V
S
= +5V, Sampling Rate = 20MHz, with a 50% duty cycle clock having a 2ns rise/fall time, unless otherwise noted.
DYNAMIC PERFORMANCE vs INPUT FREQUENCY
Frequency (Hz)
SFDR, SNR (dB)
85
80
75
70
65
60
55
100k 1M 10M 100M
SFDR
SNR
100
80
60
40
20
0
Input Amplitude (dBm)
SFDR (dBFS)
SWEPT POWER SFDR
–50 –40 –30 –20 –10 0 10
f
IN
= 10MHz
60
50
40
30
20
10
0
Input Amplitude (dBm)
SWEPT POWER SNR
–48.125 –40 –30 –20 –10 0 10
SNR (dB)
f
IN
= 10MHz
4.0
2.0
0
–2.0
–4.0
INTEGRAL LINEARITY ERROR
Code
ILE (LSB)
f
IN
= 500kHz
24 224 424 624 824 1024
80
75
70
65
60
55
DYNAMIC PERFORMANCE
vs SINGLE-ENDED FULL-SCALE INPUT RANGE
Dynamic Range (dB)
12345
Single-Ended Full-Scale Input Range (Vp-p)
SNR (f
IN
= 10MHz)
SFDR (f
IN
= 500kHz)
SNR (f
IN
= 500kHz)
SFDR (f
IN
= 10MHz)
NOTE: REFT
EXT
varied, REFB is fixed at the internal value of +1.25V.
80
75
70
65
60
55
DYNAMIC PERFORMANCE
vs DIFFERENTIAL FULL-SCALE INPUT RANGE
Dynamic Range (dB)
12345
Differential Full-Scale Input Range (Vp-p)
NOTE: REFT
EXT
varied, REFB is fixed at internal value of +1.25V.
SNR (f
IN
= 10MHz)
SFDR (f
IN
= 500kHz)
SNR (f
IN
= 500kHz)
SFDR (f
IN
= 10MHz)