參數(shù)資料
型號(hào): AD7707BR
廠商: ANALOG DEVICES INC
元件分類(lèi): ADC
英文描述: 3 V/5 V, +-10 V Input Range, 1 mW 3-Channel 16-Bit, Sigma-Delta ADC
中文描述: 3-CH 16-BIT DELTA-SIGMA ADC, SERIAL ACCESS, PDSO20
封裝: 0.300 INCH, SOIC-20
文件頁(yè)數(shù): 12/40頁(yè)
文件大?。?/td> 316K
代理商: AD7707BR
REV. A
AD7707
–12–
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 for Low Level Input Channel
READING NO.
0
C
10Hz UPDATE RATE, UNBUFFERED MODE
GAIN = 2, (
10V INPUT RANGE)
BIPOLAR MODE
ANALOG INPUT SET ON CODE TRANSITION
32769
32768
32767
32766
200
400
600
800
1000
Figure 3. Typical Noise Plot for AIN3, High Level Input
Channel
AIN3 – Volts
–10
R
m
V
AV
= DV
= 5V
REFIN(+) = 2.5V
REFIN(–) = AGND
T
A
= +25
8
C
7
8
9
10
HIGH LEVEL INPUT CHANNEL
10V INPUT RANGE
10Hz UPDATE RATE
–6
–2
2
6
10
BUFFERED MODE
UNBUFFERED MODE
6
5
4
3
2
1
0
Figure 4. Typical RMS Noise vs. Analog Input Voltage for
High Level Input Channel, AIN3
CODE
32764
O
400
0
32765
32766
32767
32768
32769
32770
300
200
100
Figure 5. Histogram of Data in Figure 2
CODE
O
10Hz UPDATE RATE
UNBUFFERED MODE
BIPOLAR MODE
GAIN = 2,
(
6
10V INPUT RANGE)
0
800
700
600
500
400
300
200
100
1
2
32767
32768
Figure 6. Histogram of Data in Figure 3
INPUT VOLTAGE – mV
–20
R
m
V
AV
= DV
= 5V
REFIN(+) = 2.5V
REFIN(–) = AGND
T
A
= +25 C
0
0.2
0.4
0.6
LOW LEVEL INPUT CHANNEL
GAIN = 128
10Hz UPDATE RATE
–15
–10
10
15
20
BUFFERED MODE
UNBUFFERED MODE
–5
0
5
0.5
0.3
0.1
Figure 7. Typical RMS Noise vs. Analog Input Voltage for
Low Level Input Channels, AIN1 and AIN2
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