AD7324 Analog Devices, AD7324 Datasheet - Page 30

• Manufacturer Part Number: AD7324
• Description: Software Selectable True Bipolar Input, 4-Channel, 12-Bit Plus Sign A/D Converter
• Manufacturer: Analog Devices

Specifications of AD7324

• Resolution (bits): 13bit
• # Chan: 4
• Sample Rate: 1MSPS
• Interface: Ser,SPI
• Analog Input Type: Diff-Bip,Diff-Uni,SE-Uni
• Ain Range: Bip (Vref),Bip (Vref) x 2,Bip (Vref) x 4,Bip 10V,Bip 2.5V,Bip 5.0V,Uni (Vref) x 4,Uni 10V
• Adc Architecture: SAR
• Pkg Type: SOP

AD7324
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
CC
DD
A
VARIABLE SCLK
of 3 V and 5 V,
= 25°C
/V
= 3V
SS
800
= ±12V
900 1000
CC
1100
Rev. A | Page 30 of 36
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
CC
DD
A
= 25°C
/V
= 5V
700
SS
= ±12V
20MHz SCLK
800
900
CC
1000