Datasheet

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TYPICAL CHARACTERISTICS ADS7868
−90
−80
−70
−60
−50
−40
−30
−20
−10
0
0 5
10 15
20 25 30 35 40 45 50
Normalized Amplitude − dB
V
DD
= 1.2 V,
f
SAMPLE
= 100 KSPS,
f
i
= 30 kHz,
SNR = 48.669 dB,
SINAD = 48.605 dB,
THD (9) = −66.910 dB,
SFDR = 67.041 dB
f
i
− Input Frequency − kHz
−90
−80
−70
−60
−50
−40
−30
−20
−10
0
0 10 20 30 40 50 60 70 80 90 100
Normalized Amplitude − dB
V
DD
= 1.6 V,
f
SAMPLE
= 200 KSPS,
f
i
= 30 kHz,
SNR = 49.420 dB,
SINAD = 49.413 dB,
THD (9) = −77.085 dB,
SFDR = 67.893 dB
f
i
− Input Frequency − kHz
150
175
200
225
250
275
300
1.2 1.4 1.6 1.8
V
DD
− Supply Voltage − V
Throughput Rate − KSPS
8-Bit NMC, T
A
= 25°C,
t
SAMPLE
= 2.375/f
SCLK
,
t
DIS(EOC-SDOZ)
+t
SU(LSBZ-CSF)
= 0.375/f
SCLK
,
Throughput Rate = 12 SCLK Cycles
300
325
350
375
400
425
450
475
500
525
550
575
1.6 1.8 2 2.2 2.4 2.6 2.8 3 3.2 3.4 3.6
V
DD
− Supply Voltage − V
Throughput Rate − KSPS
8-Bit NMC, T
A
= 25°C,
t
SAMPLE
= 2.25/f
SCLK
,
t
DIS(EOC-SDOZ)
+t
SU(LSBZ-CSF)
= 0.25/f
SCLK
,
Throughput Rate = 12 SCLK Cycles
ADS7866
ADS7867
ADS7868
SLAS465 – JUNE 2005
FFT (8192 Points)
Figure 23.
FFT (8192 Points)
Figure 24.
THROUGHPUT RATE THROUGHPUT RATE
vs vs
SUPPLY VOLTAGE SUPPLY VOLTAGE
Figure 25. Figure 26.
16