AD7323 Analog Devices, AD7323 Datasheet - Page 31

• Manufacturer Part Number: AD7323
• Description: 500 kSPS, 4-Channel, Software Selectable True bipolar Input, 12-Bit Plus Sign A/D Converter
• Manufacturer: Analog Devices

Specifications of AD7323

• Resolution (bits): 13bit
• # Chan: 4
• Sample Rate: 500kSPS
• Interface: Ser,SPI
• Analog Input Type: Diff-Uni,SE-Uni
• Ain Range: Bip 10V,Bip 2.5V,Bip 5.0V,Uni 10V
• Adc Architecture: SAR
• Pkg Type: SOP

POWER vs. THROUGHPUT RATE
The power consumption of the AD7323 varies with throughput
rate. The static power consumed by the AD7323 is very low, and
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 AD7323 at a V
tively. Both plots clearly show that the average power consumed
by the AD7323 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 variable SCLK that scales with the sampling frequency.
12
10
8
6
4
2
0
0
V
V
T
INTERNAL REFERENCE
A
CC
DD
Figure 49. Power vs. Throughput Rate with 3 V V
= 25°C
/V
= 3V
SS
= ±12V
100
THROUGHPUT RATE (kSPS)
200
300
CC
VARIABLE SCLK
of 3 V and 5 V, respec-
400
CC
500
Rev. A | Page 31 of 36
20
18
16
14
12
10
8
6
4
2
0
0
V
V
T
INTERNAL REFERENCE
Figure 50. Power vs. Throughput Rate with 5 V V
CC
DD
A
= 25°C
/V
= 5V
SS
= ±12V
100
VARIABLE SCLK
THROUGHPUT RATE (kSPS)
200
300
400
CC
AD7323
500