EVAL-AD7324CB AD [Analog Devices], EVAL-AD7324CB Datasheet - Page 31

• Manufacturer Part Number: EVAL-AD7324CB
• Description: 4-Channel, Software-Selectable, True Bipolar Input, 12-Bit Plus Sign ADC
• Manufacturer: AD [Analog Devices]

POWER VS. THROUGHPUT RATE
The power consumption of the AD7324 varies with throughput
rate. The static power consumed by the AD7324 is very low, and
a significant power savings can be achieved as the throughput
rate is reduced. Figure 49 and Figure 50 shows the power vs.
throughput rate for the AD7324 at a V
respectively. Both plots clearly show that the average power
consumed by the AD7324 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 49 and
Figure 50 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
10
8
6
4
2
0
0
Figure 49. Power vs. Throughput Rate with 3 V V
100
200
300
THROUGHPUT RATE (kSPS)
400
20MHz SCLK
500
600
CC
V
V
T
INTERNAL REFERENCE
700
A
CC
DD
VARIABLE SCLK
= 25°C
of 3 V and 5 V,
/V
= 3V
SS
800
= ±12V
900 1000
CC
1100
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20
18
16
14
12
10
8
6
4
2
0
0
Figure 50. Power vs. Throughput Rate with 5 V V
100
200
300
THROUGHPUT RATE (kHz)
400
500
VARIABLE SCLK
600
V
V
T
INTERNAL REFERENCE
A
CC
DD
= 25°C
/V
700
= 5V
SS
= ±12V
20MHz SCLK
800
900
CC
AD7324
1000