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EVAL-AD7705EB bảng dữ liệu(PDF) 14 Page - Analog Devices

tên linh kiện EVAL-AD7705EB
Giải thích chi tiết về linh kiện  3 V/5 V, 1 mW, 2-/3-Channel, 16-Bit, Sigma-Delta ADCs
PDF  44 Pages
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nhà sản xuất  AD [Analog Devices]
Trang chủ  http://www.analog.com
Logo AD - Analog Devices

EVAL-AD7705EB bảng dữ liệu(HTML) 14 Page - Analog Devices

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AD7705/AD7706
Rev. C | Page 14 of 44
TYPICAL PERFORMANCE CHARACTERISTICS
READING NUMBER
32763
0
100
32764
32765
32766
32767
32768
32769
32770
32771
200
300
400
500
600
700
800
900
1000
VDD = 5V
VREF = 2.5V
GAIN = +128
50Hz UPDATE RATE
TA = 25°C
RMS NOISE = 600nV
Figure 5. Noise @ Gain = +128 With 50 Hz Update Rate
FREQUENCY (MHz)
0.4
VDD = 3V
TA = 25°C
1.2
1.0
0.8
0.6
0.4
0.2
0
0.6
0.8
1.0
1.2
1.4
1.6
1.8
2.0
2.2
2.4
2.6
BUFFERED MODE, GAIN = +128
UNBUFFERED MODE, GAIN = +1
UNBUFFERED MODE, GAIN = +128
BUFFERED MODE, GAIN = +1
Figure 6. IDD vs. MCLK IN Frequency @ 3 V
GAIN
1
1.0
0.8
0.6
0.4
0.2
0
0.1
0.3
0.5
0.7
0.9
2
4
8
16
32
64
128
BUFFERED MODE
fCLK = 5MHz,
CLKDIV = 1
UNBUFFERED MODE
fCLK = 1MHz,
CLKDIV = 0
VDD = 3V
EXTERNAL MCLK
CLKDIS = 1
TA = 25°C
BUFFERED MODE
fCLK = 2.4576MHz, CLKDIV = 0
UNBUFFERED MODE
fCLK = 5MHz, CLKDIV = 1
UNBUFFERED MODE
fCLK = 2.84MHz, CLKDIV = 0
BUFFERED MODE
fCLK = 1MHz, CLKDIV = 0
Figure 7. IDD vs. Gain and Clock Frequency @ 3 V
CODE
32764
400
0
32765
32766
32767
32768
32769
32770
300
200
100
Figure 8. Histogram of Data in Figure 5
FREQUENCY (MHz)
0.4
VDD = 5V
TA = +25°C
1.2
1.0
0.8
0.6
0.4
0.2
0
0.6
0.8
1.0
1.2
1.4
1.6
1.8
2.0
2.2
2.4
2.6
BUFFERED MODE, GAIN = +128
UNBUFFERED MODE, GAIN = +1
UNBUFFERED MODE, GAIN = +128
BUFFERED MODE, GAIN = +1
Figure 9. IDD vs. MCLK IN Frequency @ 5 V
GAIN
1
VDD = 5V
EXTERNAL MCLK
CLKDIS = 1
TA = 25°C
1.2
0.8
0.6
0.4
0.2
0
1.0
2
4
8
16
32
64
128
BUFFERED MODE
fCLK = 5MHz,
CLKDIV = 1
BUFFERED MODE
fCLK = 1MHz, CLKDIV = 0
BUFFERED MODE
fCLK = 2.4576MHz, CLKDIV = 0
UNBUFFERED MODE
fCLK = 2.4576MHz, CLKDIV = 0
UNBUFFERED MODE
fCLK = 1MHz,
CLKDIV = 0
UNBUFFERED MODE
fCLK = 5MHz, CLKDIV = 1
Figure 10. IDD vs. Gain and Clock Frequency @ 5 V



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