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AD7322 датащи(PDF) 30 Page - Analog Devices

номер детали AD7322
подробное описание детали  2-Channel, Software-Selectable, True Bipolar Input, 1 MSPS, 12-Bit Plus Sign ADC
PDF  37 Pages
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производитель  AD [Analog Devices]
домашняя страница  http://www.analog.com
Logo AD - Analog Devices

AD7322 датащи(HTML) 30 Page - Analog Devices

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Data Sheet
AD7322
Rev. B | Page 29 of 36
POWER vs. THROUGHPUT RATE
The power consumption of the AD7322 varies with throughput
rate. The static power consumed by the AD7322 is very low, and
a significant power savings can be achieved as the throughput
rate is reduced. Figure 48 and Figure 49 shows the power vs.
throughput rate for the AD7322 at a VCC of 3 V and 5 V,
respectively. Both plots clearly show that the average power
consumed by the AD7322 is greatly reduced as the sample
frequency is reduced. This is true whether a fixed SCLK value is
used or if it is scaled with the sampling frequency. Figure 48 and
Figure 49 show the power consumption when operating in
normal mode for a fixed 20 MHz SCLK and a variable SCLK
that scales with the sampling frequency.
12
0
0
1100
THROUGHPUT RATE (kSPS)
10
8
6
4
2
100
200
300
400
500
600
700
800
900 1000
VARIABLE SCLK
20MHz SCLK
VCC = 3V
VDD/VSS = ±12V
TA = 25°C
INTERNAL REFERENCE
Figure 48. Power vs. Throughput Rate with 3 V VCC
20
0
0
1000
THROUGHPUT RATE (kHz)
18
16
14
12
10
8
6
4
2
100
200
300
400
500
600
700
800
900
20MHz SCLK
VARIABLE SCLK
VCC = 5V
VDD/VSS = ±12V
TA = 25°C
INTERNAL REFERENCE
Figure 49. Power vs. Throughput Rate with 5 V VCC



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