ADS5294_15 Datasheet, PDF (27/81 Pages) Texas Instruments – Octal-Channel 14-Bit 80-MSPS High-SNR and Low-Power ADC

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ADS5294
SLAS776D – NOVEMBER 2011 – REVISED SEPTEMBER 2015
Typical Characteristics (continued)
Typical values are at 25°C, AVDD = 1.8 V, LVDD = 1.8 V, 50% clock duty cycle, –1-dBFS differential analog input, 14 Bit/ 80
MSPS, ADC is configured in the internal reference mode, unless otherwise noted.
0
−10
−20
−30
−40
−50
−60
−70
−80
−90
−100
−110
−120
−130
−140
0
LF noise suppression enabled
LF noise suppression disabled
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1
Frequency (MHz)
0
LF noise suppression enabled
−10
LF noise suppression disabled
−20
−30
−40
−50
−60
−70
−80
−90
−100
−110
−120
−130
−140
39 39.1 39.2 39.3 39.4 39.5 39.6 39.7 39.8 39.9 40
Frequency (MHz)
Figure 38. FFT (0 to 1 MHz) for 5-MHz Input Signal, Sample
Rate = 80 MSPS with Low Frequency Noise Suppression
Enabled
Figure 39. FFT (39 MHz to 40 MHz) for 5-MHz Input Signal,
Sample Rate = 80 MSPS with Low Frequency Noise
Suppression Enabled
450
350
2−wire
325
1−wire
1−wire Decimate by 2
400
300
275
350
250
225
300
200
175
250
150
200
150
10
20
30
40
50
60
70
80
Sampling Frequency (MSPS)
125
100
75
50
10 15 20 25 30 35 40 45 50 55 60 65 70 75 80
Sampling Frequency (MSPS)
Figure 40. Power Consumption on Analog Supply
Figure 41. Power Consumption on Digital Supply
240
190
2−wire
1−wire
220
170
1−wire Decimate by 2
200
150
180
130
160
110
140
90
120
70
100
50
80
10
20
30
40
50
60
70
80
Sampling Frequency (MSPS)
Figure 42. Supply Current on Analog Supply
30
10
20
30
40
50
60
70
80
Sampling Frequency (MSPS)
Figure 43. Supply Current on Digital Supply
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