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參數(shù)資料
| 型號： | ADSD-1402S-EX |
| 廠商： | MURATA POWER SOLUTIONS INC |
| 元件分類： | ADC |
| 英文描述： | 2-CH 14-BIT PROPRIETARY METHOD ADC, PARALLEL ACCESS, PDSO40 |
| 封裝： | SMT, TDIP-40 |
| 文件頁數(shù)： | 3/5頁 |
| 文件大?。?/td> | 1523K |
| 代理商： | ADSD-1402S-EX |
ADSD-1402S
3
3.
Full-Scale (Gain) Adjustments
Set the output of the voltage reference used in step 2 to the
value shown in Table 2.
Table 2. Offset and Gain Adjustments
Input
Offset Adjust
Range
+1/2 LSB
Gain Adjust
FS – 1 LSB
±5V
+0.000305V
+4.999085V
Adjust the gain trimpot R1 until the output code flickers
equally between 11 1111 1111 1110 and 11 1111 1111
1111
4. Repeat above steps for Analog Input B (Pin 40). Use trim-
pot R3 for the zero (Offset) adjustment and trimpot R4 for
the Full-Scale (Gain) adjustment.
5. To confirm proper operation of the device, vary the preci-
sion reference voltage source to obtain the output coding
TECHNICAL NOTES
1. Rated performance requires using good high-frequency
circuit board layout techniques. Connect the digital and
analog grounds to one point, the analog ground plane be-
neath the converter. Due to the inductance and resistance
of the power supply return paths, return the analog and
digital ground separately to the power supplies.
Figure 2. ADSD-1402S Timing Diagram
CALIBRATION PROCEDURE
1. Connect the converter per Figure 3. Apply a pulse of 100
nanoseconds minimum to START CONVERT (pin 11) at a
rate of 200kHz. 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 ANA-
LOG INPUT A (pin 1) and SIGNAL GROUND (pin 3), then
adjust the reference source output per Table 2. Adjust trim-
pot R2 until the code flickers equally between 10 0000 0000
0000 and 10 0000 0000 0001.
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
+4.999390
+4.250000
+2.500000
±0.000000
–2.500000
–4.250000
–4.999390
–5.000000
+FS – 1LSB
+3/4FS
+1/2FS
0
–1/2FS
–3/4FS
–FS+1LSB
–FS
OUTPUT CODING
MSB
INPUT RANGE
±5V
BIPOLAR
SCALE
LSB
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ADSD-1405MC | 制造商:Murata Power Solutions 功能描述:Analog to Digital Converter |
| ADSD-1410MC | 制造商:Murata Power Solutions 功能描述:ADC Dual 10Msps 14-bit Parallel 28-Pin CDDIP 制造商:Murata Power Solutions 功能描述:Dual ADC 10Msps 14-bit Parallel 28-Pin CDDIP |
| ADSD-1410MM | 制造商:Murata Power Solutions 功能描述:ADC Dual 10Msps 14-bit Parallel 28-Pin CDDIP |
| ADSD-1410S | 制造商:Murata Power Solutions 功能描述:Dual ADC 10Msps 14-bit Parallel 40-Pin TDIP SMT |
| ADSD-1410S-EX | 制造商:MURATA-PS 制造商全稱:Murata Power Solutions Inc. 功能描述:Dual 14-Bit, 10MSPS Sampling A/D Converter |
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