參數(shù)資料
型號: AD7791BRM
廠商: ANALOG DEVICES INC
元件分類: ADC
英文描述: Low Power, Buffered 24-Bit Sigma-Delta ADC
中文描述: 1-CH 24-BIT DELTA-SIGMA ADC, SERIAL ACCESS, PDSO10
封裝: MSOP-10
文件頁數(shù): 9/20頁
文件大小: 308K
代理商: AD7791BRM
AD7791
TYPICAL PERFORMANCE CHARACTERISTICS
Rev. 0 | Page 9 of 20
04227-0-012
–120
–110
–100
–90
–80
–70
–60
–50
–40
–30
–20
–10
0
40
80
20
60
FREQUENCY (Hz)
100
120
140
d
160
0
Figure 6. Frequency Response with 16.6 Hz Update Rate
04227-0-010
0
20
8388591
O
8388619
40
60
80
100
CODE
V
DD
= 3V
V
= 2.048V
9.5Hz UPDATE RATE
T
= 25°C
RMS NOISE = 1
μ
V
Figure 7. Noise Distribution Histogram
(CDIV1 = CDIV0 = 0)
04227-0-011
8388591
0
200
400
600
800
C
1000
8388619
READ NO.
V
DD
= 3V, V
= 2.048V, 9.5Hz UPDATE RATE
T
A
= 25°C, RMS NOISE = 1
μ
V
Figure 8. Typical Noise Plot with 16.6 Hz Update Rate
(CDIV1 = CDIV0 = 0)
04227-0-014
1
2
3
4
5
6
7
8
80
O
8388616
9
CODE
V
DD
= 3V
V
= 2.048V
1.1875Hz UPDATE RATE
T
= 25°C
RMS NOISE = 1.25
μ
F
Figure 9. Noise Histogram for Clock Divide by 8 Mode
(CDIV0 = CDIV1 = 1)
04227-0-013
8388592
0
20
40
60
80
C
100
8388616
READ NO.
V
= 3V, V
= 2.048V
1.1875Hz UPDATE RATE
T
A
= 25°C, RMS NOISE = 1.25
μ
F
Figure 10. Noise Plot in Clock Divide by 8 Mode
(CDIV0 = CDIV1 = 1)
04227-0-015
0
0.5
1.0
1.5
0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
R
μ
V
5.0
3.0
2.5
2.0
V
REF
(V)
V
= 5V
UPDATE RATE = 16.6Hz
T
A
= 25°C
Figure 11. RMS Noise vs. Reference Voltage
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