參數(shù)資料
型號(hào): AD7707BR
廠商: Analog Devices Inc
文件頁(yè)數(shù): 4/52頁(yè)
文件大?。?/td> 0K
描述: IC ADC 16BIT 3CH 20-SOIC
標(biāo)準(zhǔn)包裝: 37
位數(shù): 16
采樣率(每秒): 500
數(shù)據(jù)接口: DSP,MICROWIRE?,QSPI?,串行,SPI?
轉(zhuǎn)換器數(shù)目: 1
功率耗散(最大): 1mW
電壓電源: 模擬和數(shù)字
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 20-SOIC(0.295",7.50mm 寬)
供應(yīng)商設(shè)備封裝: 20-SOIC W
包裝: 管件
輸入數(shù)目和類型: 1 個(gè)單端,單極;1 個(gè)單端,雙極;2 個(gè)偽差分,單極;2 個(gè)偽差分,雙極
AD7707
Rev. B | Page 12 of 52
TYPICAL PERFORMANCE CHARACTERISTICS
CODE
32,764
O
CCURR
E
NCE
400
0
32,765
32,766
32,767
32,768
32,769
32,770
300
200
100
08
69
1-
00
7
READING NUMBER
32,763
0100
CO
DE
R
E
AD
32,764
32,765
32,766
32,767
32,768
32,769
32,770
32,771
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
08
69
1-
0
04
Figure 4. Typical Noise Plot at Gain = 128 with 50 Hz Update Rate for Low
Level Input Channel
Figure 7. Histogram of Data in Figure 4
READING NUMBER
0
CO
D
E
32,769
32,768
32,767
32,766
10Hz UPDATE RATE, UNBUFFERED MODE
GAIN = 2 (±10V INPUT RANGE)
BIPOLAR MODE
ANALOG INPUT SET ON CODE TRANSITION
200
400
600
800
1000
08
69
1-
0
05
CODE
O
CC
URRE
N
CE
0
800
700
600
500
400
300
200
100
08
69
1-
0
08
10Hz UPDATE RATE
UNBUFFERED MODE
BIPOLAR MODE
GAIN = 2
(±10V INPUT RANGE)
1
32,767
2
32,768
Figure 8. Histogram of Data in Figure 5
Figure 5. Typical Noise Plot for AIN3, High Level Input Channel
AIN3 (V)
–10
R
M
S
N
O
ISE
(
V)
7
8
9
10
–6
–2
2
6
10
BUFFERED MODE
UNBUFFERED MODE
6
5
4
3
2
1
0
08
69
1-
00
6
HIGH LEVEL INPUT CHANNEL
±10V INPUT RANGE
10Hz UPDATE RATE
AVDD= DVDD= 5V
REF IN(+) = 2.5V
REF IN(–) = AGND
TA = 25°C
INPUT VOLTAGE (mV)
–20
RM
S
NO
IS
E
(
V
)
0
0.2
0.4
0.6
0
2
5
1
0
1
0
1
5
1
BUFFERED MODE
UNBUFFERED MODE
–5
0
5
0.5
0.3
0.1
08
69
1-
0
09
LOW LEVEL INPUT CHANNEL
GAIN = 128
10Hz UPDATE RATE
AVDD= DVDD= 5V
REF IN(+) = 2.5V
REF IN(–) = AGND
TA = +25°C
Figure 6. Typical RMS Noise vs. Analog Input Voltage for High Level Input
Channel, AIN3
Figure 9. Typical RMS Noise vs. Analog Input Voltage for Low Level Input
Channels, AIN1 and AIN2
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