参数资料
型号: AD7321BRUZ-REEL7
厂商: Analog Devices Inc
文件页数: 25/37页
文件大小: 0K
描述: IC ADC 12BIT+ SAR 2CHAN 14TSSOP
标准包装: 1,000
位数: 12
采样率(每秒): 500k
数据接口: DSP,MICROWIRE?,QSPI?,串行,SPI?
转换器数目: 1
功率耗散(最大): 17mW
电压电源: 双 ±
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 14-TSSOP(0.173",4.40mm 宽)
供应商设备封装: 14-TSSOP
包装: 带卷 (TR)
输入数目和类型: 2 个单端,单极;2 个单端,双极;1 个差分,单极;1 个差分,双极
配用: EVAL-AD7321CBZ-ND - BOARD EVALUATION FOR AD7321
AD7321
Data Sheet
Rev. B | Page 30 of 36
POWER VS. THROUGHPUT RATE
The power consumption of the AD7321 varies with throughput
rate. The static power consumed by the AD7321 is very low, and
significant power savings is achieved as the throughput rate is
reduced. Figure 48 and Figure 49 shows the power vs.
throughput rate for the AD7321 at a VCC of 3 V and 5 V,
respectively. Both plots clearly show that the average power
consumed by the AD7321 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 variable SCLK that scales with the sampling
frequency.
12
0
THROUGHPUT RATE (kSPS)
A
VER
A
G
E
PO
W
ER
(m
W
)
10
8
6
4
2
100
200
300
400
500
VARIABLE SCLK
VCC = 3V
VDD/VSS = ±12V
TA = 25°C
INTERNAL REFERENCE
05399-
052
Figure 48. Power vs. Throughput Rate with 3 V VCC
20
0
THROUGHPUT RATE (kSPS)
A
VER
A
G
E
PO
W
ER
(m
W
)
18
16
14
12
10
8
6
4
2
100
200
300
400
500
VARIABLE SCLK
VCC = 5V
VDD/VSS = ±12V
TA = 25°C
INTERNAL REFERENCE
05399-
053
Figure 49. Power vs. Throughput Rate with 5 V VCC
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