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參數(shù)資料
| 型號： | ADS-929MC |
| 廠商： | MURATA POWER SOLUTIONS INC |
| 元件分類： | ADC |
| 中文描述： | 1-CH 14-BIT FLASH METHOD ADC, PARALLEL ACCESS, CDIP24 |
| 封裝： | METAL SEALED, CERAMIC, DDIP-24 |
| 文件頁數(shù)： | 4/8頁 |
| 文件大?。?/td> | 639K |
| 代理商： | ADS-929MC |
To Pin 20
15V
SINPUT
AGAIN
1.98k
7
50
7
+15V
2k
7
200k
7
20k
7
–15V
+15V
ADJUST
Figure 2. ADS-919 Calibration Circuit
Figure 3. Typical ADS-919 Connection Diagram
CALIBRATION PROCEDURE (Refer to Figures 2 and 3)
Any offset and/or gain calibration procedures should not be implemented
until devices are fully warmed up. To avoid interaction, offset must be
adjusted before gain. The ranges of adjustment for the circuit of Figure 2
are guaranteed to compensate for the ADS-919's initial accuracy errors
and may not be able to compensate for additional system errors.
All fixed resistors in Figure 2 should be metal-film types, and multiturn
potentiometers should have TCR’s of 100ppm/°C or less to minimize drift
with temperature.
A/D converters are calibrated by positioning their digital outputs exactly
on the transition point between two adjacent digital output codes. This can
be accomplished by connecting LED's to the digital outputs and adjusting
until certain LED's "flicker" equally between on and off. Other approaches
employ digital comparators or microcontrollers to detect when the outputs
change from one code to the next.
For the ADS-919, offset adjusting is normally accomplished at the point
where the output bits are 0's and the LSB just changes from a 0 to a 1.
This digital output transition ideally occurs when the applied analog input
is + LSB (+305μV).
Gain adjusting is accomplished when all bits are 1's and the LSB just
changes from a 1 to a 0. This transition ideally occurs when the analog
input is at +full scale minus 1 LSB's (+9.999085V).
Zero/Offset Adjust Procedure
1. Apply a train of pulses to the START CONVERT input (pin 16) so the con-
verter is continuously converting. If using LED's on the outputs, a 200kHz
conversion rate will reduce flicker.
2. Apply +305μV to the ANALOG INPUT (pin 20).
3. Adjust the offset potentiometer until the output bits are all 0's and the LSB
flickers between 0 and 1.
Gain Adjust Procedure
1. Apply +9.999085V to the ANALOG INPUT (pin 20).
2. Adjust the gain potentiometer until the output bits are all 1's and the LSB
flickers between 1 and 0.
Table 2. Output Coding
INPUT VOLTAGE
(0 TO +10V)
UNIPOLAR SCALE
DIGITAL OUTPUT
OFFSET
MSB
BINARY
LSB
+9.999390
+FS –1LSB
11 1111 1111 1111
+7.500000
+3/4 FS
11 0000 0000 0000
+5.000000
+1/2 FS
10 0000 0000 0000
+2.500000
+1/4 FS
01 0000 0000 0000
+0.000610
+1LSB
00 0000 0000 0001
0.000000
0
00 0000 0000 0000
Coding is straight binary; 1LSB = 610μV.
Table 1. Zero and Gain Adjust
NPUT VOLT-
AGE RANGE
ZERO ADJUST
+ LSB
GAIN ADJUST
+FS –1 LSB
0 to +10V
+305μV
+9.999085V
ADS-919
14-Bit, 2MHz, Low-Power Sampling A/D Converters
DATEL
11 Cabot Boulevard, Mansfield, MA 02048-1151 USA Tel: (508) 339-3000 www.datel.com e-mail: help@datel.com
01 Apr 2011 MDA_ADS-919.B02
Page 4 of 8
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PDF描述 |
|---|---|
| ADS-945 | |
| ADS-951MC | |
| ADS-CCD1202MM | |
| ADSD-1402S-EX | 2-CH 14-BIT PROPRIETARY METHOD ADC, PARALLEL ACCESS, PDSO40 |
| ADSD-1410S-EX | 2-CH 14-BIT PROPRIETARY METHOD ADC, PARALLEL ACCESS, DSO40 |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| ADS-929MM | 制造商:Murata Power Solutions 功能描述:Single ADC 2-Step Flash 2Msps 14-bit Parallel 24-Pin CDDIP |
| ADS930 | 制造商:BB 制造商全稱:BB 功能描述:8-Bit, 30MHz Sampling ANALOG-TO-DIGITAL CONVERTER |
| ADS-930 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:16-Bit, 500kHz Sampling A/D Converters |
| ADS-930/883 | 制造商:Murata Power Solutions 功能描述:Single ADC Pipelined 500ksps 16-bit Parallel 40-Pin CTDIP |
| ADS930E | 功能描述:模數(shù)轉換器 - ADC 8-Bit 30 MSPS SE/ Diff Input RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結構:Sigma-Delta 轉換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
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