參數(shù)資料
型號: ADADC80-Z-12
廠商: Analog Devices Inc
文件頁數(shù): 3/16頁
文件大?。?/td> 0K
描述: IC ADC 12BIT INTEGRATED 32-CDIP
標準包裝: 1
位數(shù): 12
采樣率(每秒): 40k
數(shù)據(jù)接口: 并聯(lián)
轉(zhuǎn)換器數(shù)目: 1
功率耗散(最大): 800mW
電壓電源: 模擬和數(shù)字,雙 ±
工作溫度: -25°C ~ 85°C
安裝類型: 通孔
封裝/外殼: 32-CDIP(0.910",23.12mm)
供應(yīng)商設(shè)備封裝: 32-CDIP 側(cè)面銅焊
包裝: 管件
輸入數(shù)目和類型: 2 個單端,單極;2 個單端,雙極
ADADC80
Rev. E | Page 11 of 16
CALIBRATION
External zero adjustment and gain adjustment potentiometers,
connected as shown in Figure 13 and Figure 14, are used for
device calibration. To prevent interaction of these two adjustments,
zero is always adjusted first and gain second. Zero is adjusted
with the analog input near the most negative end of the analog
range (0 for unipolar and FS for bipolar input ranges). Gain is
adjusted with the analog input near the most positive end of the
analog range.
0 V to 10 V Range
Set analog input to +1 LSB = 0.0024 V; adjust zero for digital
output = 111111111110. Zero is now calibrated. Set analog
input to +FSR 2 LSB = 9.9952 V; adjust gain for 000000000001
digital output code. Full-scale gain is now calibrated. For half-
scale calibration check, set analog input to 5.0000 V; digital
output code should be 011111111111.
10 V to +10 V Range
Set analog input to 9.9951 V; adjust zero for 111111111110
digital output (complementary offset binary) code. Set analog
input to +9.9902 V; adjust gain for 000000000001 digital output
(complementary offset binary) code. For half-scale calibration
check, set analog input to 0.0000 V; digital output (complemen-
tary offset binary) code should be 011111111111.
12
14
COMPARATOR
SAR
DAC
13
11
+
REF
ADADC80
1.8M
10k
–15V
+15V
ANALOG
INPUT
0.01F
10M
10k
–15V
+15V
+5V
–15V
+15V
25
24
15
17
9
10
16
REF OUT
(6.3V)
15V OR 12V
ANALOG
GND
–15V OR
–12V
5V DIGITAL
SUPPLY
DIGITAL
GND
GAIN
ADJUST
COMPARATOR
IN
BIPOLAR
OFFSET
OUT
20V
SPAN
IN
10V
SPAN
IN
0
120
2-
01
3
Figure 13. Analog and Power Connections for Unipolar 0 V to 10 V Input Range
12
COMPARATOR
SAR
DAC
13
11
+
REF
ADADC80
1.8M
10k
+15V
ANALOG
INPUT
–15V
0.01F
10M
10k
–15V
+15V
+5V
–15V
+15V
25
24
15
17
9
10
16
REF OUT
(6.3V)
15V OR 12V
ANALOG
GND
–15V OR
–12V
5V DIGITAL
SUPPLY
DIGITAL
GND
GAIN
ADJUST
COMPARATOR
IN
BIPOLAR
OFFSET
OUT
20V
SPAN
IN
10V
SPAN
IN
14
01
20
2-
01
4
Figure 14. Analog and Power Connections for Bipolar ±10 V Input Range
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