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參數資料
| 型號： | ADS-942AME |
| 廠商： | Electronic Theatre Controls, Inc. |
| 元件分類： | 串行ADC |
| 英文描述： | 14-Bit, 2MHz, Low-Power Sampling A/D Converters |
| 中文描述： | 14位，2MHz的，低功耗采樣A / D轉換器 |
| 文件頁數： | 4/6頁 |
| 文件大小： | 76K |
| 代理商： | ADS-942AME |
ADS -942A
4
Use external trimpots to remove system errors or to reduce
small initial errors to zero. Use a 100
trimpot in series
with the analog input for gain adjustment; use a fixed 50
resistor in its place for operation without adjustment.
Use a 20k
trimpot with the wiper tied to OFFSET ADJUST
(pin 5) for zero/offset adjustment. Connect pin 5 to ANA-
LOG GROUND (pin 6) for operation without zero/offset
adjustment.
Figure 3. ADS-942A Connection Diagram (Unipolar Input)
Table 3. Output Coding
UNIPOLAR
SCALE
INPUT VOLT.
0 TO +10V
OUTPUT CODING
MSB
INPUT VOLT.
±5V
BIPOLAR
SCALE
MSB
LSB
LSB
MSB
LSB
+FS – 1 LSB
+7/8 FS
+3/4 FS
+1/2 FS
+1/4 FS
+1/8 FS
+1 LSB
0
+9.999390
+8.750000
+7.500000
+5.000000
+2.500000
+1.250000
+0.000610
0.000000
11 1111 1111 1111
11 1000 0000 0000
11 0000 0000 0000
10 0000 0000 0000
01 0000 0000 0000
00 1000 0000 0000
00 0000 0000 0001
00 0000 0000 0000
00 0000 0000 0000
00 0111 1111 1111
00 1111 1111 1111
01 1111 1111 1111
10 1111 1111 1111
11 0111 1111 1111
11 1111 1111 1110
11 1111 1111 1111
01 1111 1111 1111
01 1000 0000 0000
01 0000 0000 0000
00 0000 0000 0000
11 0000 0000 0000
10 1000 0000 0000
10 0000 0000 0001
10 0000 0000 0000
+4.999390
+3.750000
+2.500000
0.000000
–2.500000
–3.750000
–4.999390
–5.000000
+FS – 1LSB
+3/4FS
+1/2FS
0
–1/2FS
–3/4FS
–FS+1LSB
–FS
STRAIGHT BIN.
COMP. BINARY
OFF. BINARY
COMP. OFF. BIN.
TWO'S COMP.
ADS-942A
20k
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
7
16
BIT 1 OUT(MSB)
BIT 1 OUT(MSB)
BIT 2 OUT
BIT 3 OUT
BIT 4 OUT
BIT 5 OUT
BIT 6 OUT
BIT 7 OUT
BIT 8 OUT
BIT 9 OUT
BIT 10 OUT
BIT 11 OUT
BIT 12 OUT
BIT 13 OUT
BIT 14 OUT (LSB)
OVERFLOW
EOC
ANALOG
GROUND
DIGITAL
GROUND
4.7μF
0.1μF
ENABLE
+10V REF. OUT
CODING SELECT
10
11
9
1
8
–15V
+15V
OFFSET
ADJUST
5
3
0.1μF
4.7μF
6, 15
13
0.1μF
4.7μF
12
+
+
–15V
+15V
32
START CONVERT
ANALOG INPUT
100
2
BIPOLAR
4 SIGNAL GROUND
ZERO/OFFSET
ADJUST
0 to +10V
GAIN ADJUST
0.1μF
4.7μF
0.1μF
4.7μF
+
+
–5V
+5V
14
+5V
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相關代理商/技術參數 |
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