參數(shù)資料
型號(hào): AD7706*
廠商: Analog Devices, Inc.
英文描述: 3 V/5 V. 1 mW 2-/3-Channel 16-Bit. Sigma-Delta ADCs
中文描述: 3 V / 5號(hào)五,1毫瓦2-/3-Channel 16位。 Σ-Δ模數(shù)轉(zhuǎn)換器
文件頁(yè)數(shù): 9/32頁(yè)
文件大小: 264K
AD7705/AD7706
–9–
REV. A
Typical Performance Characteristics–
READING NO.
32763
0
100
C
32764
32765
32766
32767
32768
32769
32770
32771
200
300
400
500
600
700
800
900 1000
V
DD
= 5V
V
REF
= 2.5V
GAIN = 128
50Hz UPDATE RATE
T
= +25
8
C
RMS NOISE = 600nV
Figure 2. Typical Noise Plot @ Gain = 128 with 50 Hz
Update Rate
FREQUENCY – MHz
0.4
I
D
V
DD
= 3V
T
A
= +25
8
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 3. Typical I
DD
vs. MCLKIN Frequency @ 3 V
GAIN
1
I
D
V
= 3V
EXTERNAL MCLK
CLKDIS = 1
T
A
= +25
8
C
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
f
= 5MHz,
CLKDIV = 1
BUFFERED MODE
f
CLK
= 1MHz, CLKDIV = 0
BUFFERED MODE
f
CLK
= 2.4576MHz, CLKDIV = 0
UNBUFFERED MODE
f
CLK
= 2.84MHz, CLKDIV = 0
UNBUFFERED MODE
f
= 1MHz,
CLKDIV = 0
UNBUFFERED MODE
f
CLK
= 5MHz, CLKDIV = 1
Figure 4. Typical I
DD
vs. Gain and Clock Frequency @ 3 V
CODE
32764
O
400
0
32765
32766
32767
32768
32769
32770
300
200
100
Figure 5. Histogram of Data in Figure 2
FREQUENCY – MHz
0.4
I
D
V
DD
= 5V
T
A
= +25
8
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. Typical I
DD
vs. MCLKIN Frequency @ 5 V
GAIN
1
I
D
V
= 5V
EXTERNAL MCLK
CLKDIS = 1
T
A
= +25
8
C
1.2
0.8
0.6
0.4
0.2
0
1.0
2
4
8
16
32
64
128
BUFFERED MODE
f
= 5MHz,
CLKDIV = 1
BUFFERED MODE
f
CLK
= 1MHz, CLKDIV = 0
BUFFERED MODE
f
CLK
= 2.4576MHz, CLKDIV = 0
UNBUFFERED MODE
f
CLK
= 2.4576MHz, CLKDIV = 0
UNBUFFERED MODE
f
= 1MHz,
CLKDIV = 0
UNBUFFERED MODE
f
CLK
= 5MHz, CLKDIV = 1
Figure 7. Typical I
DD
vs. Gain and Clock Frequency @ 5 V
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