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參數(shù)資料
| 型號： | ADSD-1410S-EX |
| 廠商： | CD TECHNOLOGIES INC |
| 元件分類： | ADC |
| 英文描述： | Dual 14-Bit, 10MSPS Sampling A/D Converter |
| 中文描述： | 2-CH 14-BIT PROPRIETARY METHOD ADC, PARALLEL ACCESS, DSO40 |
| 封裝： | SMT, TDIP-40 |
| 文件頁數(shù)： | 3/5頁 |
| 文件大?。?/td> | 144K |
| 代理商： | ADSD-1410S-EX |
ADSD-1410S
Page 3 of 5
www.cd4power.com
TECHNICAL NOTES
1. Rated performance requires using good high-frequency cir-
cuit board layout techniques. Connect the digital and
analog grounds to one point, the analog ground plane
beneath the converter. Due to the inductance and resis-
tance of the power supply return paths, return the analog
and digital ground separately to the power supplies.
Figure 2. ADSD-1410S Timing Diagram
CALIBRATION PROCEDURE
1. Connect the converter per Figure 3. Apply a pulse of 50
nanoseconds typical to START CONVERT (pin 11) at a rate
of 2MHz. This rate is chosen to reduce flicker if LED's are
used on the outputs for calibration purposes.
2.
Zero (Offset) Adjustments
Apply a precision voltage reference source between
ANALOG INPUT A (pin 1) and SIGNAL GROUND (pin 3),
then adjust the reference source output per Table 2. Adjust
trimpot R1 until the code flickers equally between 10 0000
0000 0000 and 10 0000 0000 0001.
3. Repeat above step for Analog Input B (Pin 40). Use trimpot
R2 for the zero (Offset) adjustment .
Table 3. Output Coding
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
+2.499695
+1.875000
+1.250000
±0.000000
–1.250000
–1.875000
–2.499695
–2.500000
+FS – 1LSB
+3/4FS
+1/2FS
0
–1/2FS
–3/4FS
–FS+1LSB
–FS
OUTPUT CODING
MSB
±2.5V
+0.000153V
Table 2. Offset Adjustment
Input
Range
Offset Adjust
+1/2 LSB
4. To confirm proper operation of the device, vary the precision
reference voltage source to obtain the output coding listed
in Table 3.
LSB
INPUT RANGE
±2.5V
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|---|---|
| ADSD1420S | 制造商:DELTA 制造商全稱:Delta Electronics, Inc. 功能描述:Dual 14-Bit, 20MSPS Sampling A/D Converter |
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