3. Pick VINMAX = ±2V
參數(shù)資料
型號： ALD500ASCL
廠商： Advanced Linear Devices Inc
文件頁數(shù)： 3/11頁
文件大?。?/td> 0K
描述： IC ADC 17BIT DUAL 16SOIC
標(biāo)準(zhǔn)包裝： 48
位數(shù)： 17
轉(zhuǎn)換器數(shù)目： 1
功率耗散（最大）： 10mW
電壓電源： 雙 ±
工作溫度： 0°C ~ 70°C
安裝類型： 表面貼裝
封裝/外殼： 16-SOIC（0.154"，3.90mm 寬）
供應(yīng)商設(shè)備封裝： 16-SOIC
包裝： 管件
輸入數(shù)目和類型： *
其它名稱： 1014-1184
ALD500AU/ALD500A/ALD500
Advanced Linear Devices
11
3. Pick VINMAX = ±2V
For I BMAX = 20A, applying equation (4),
4. Calculate, using equation (3) for CINT:
Use CINT 0.47F as the closest practical value.
5. Pick CREF and CAZ = 0.47 F
6. Pick tDINT = 2 x tINT = 200 msec.
7. Calculate the value for VREF, from equation (10):
VREF =
2
20x10-6
= 0.83
F
2
20x10-6
= 0.5
F
CINT . VINTMAX . RINT
tDINT MAX
= 1.00V
= 0.1666667 sec.
0.5 x 10-6 x 4 x 100 x 103
200 x 10-3
~
Design Example 3:
1. Pick resolution of 18 bit. Total number of counts during
tINT is 262,144.
2. Pick tINT = 16.66667 msec. x 10 cycles
This t INT allows clock period of 0.5425 sec.
and still achieve 18 bits resolution.
3. Again, as shown from previous example, pick VINMAX = ±2V
For I BMAX = 20 A, RINT =
= 100 K
4. Next, we calculate CINT:
C INT = (0.1666667) x (20 x 10-6)/4
In this case, use CINT = 1.0
F to keep
V INT < 4.0V
5. Pick CREF and CAZ = 1.0 F
6. Select tDINT = 2 x tINT = 333.333 msec.
7. Calculate VREF as shown in the previous examples
and VREF = 1.00V
4
245776
or 16.276
V/count
16.276
x
VINTMAX
VINMAX = 8.138 V/count
20 x 10-6
2
= 100 K
Design Example 4:
Objective: 5 1/2 digit + sign +over-range measurement.
1. Pick tINT = 133.333 msec. for 60Hz noise rejection.
(16.6667 msec. x 8 cycles)
Frequency = 1.8432 MHz
clock period = 0.5425
sec.
During Input Integrate Phase,
For VINT = 4.0V, the basic resolution is
For VINMAX = 2.00V, the input resolution is
2. Pick VIN range = ± 2V
For IB = 20 A, RINT =
3. Calculate CINT = (0.133333) x (20 x 10-6)/4 = 0.67 F
4. Pick CREF = CAZ = 0.67 F
5. Select tDINT = 2 x tINT = 266.667 msec.
6. Calculate VREF as shown in Design Example 1,
substituting the appropriate values:
CINT . VINTMAX . RINT
tDINT MAX
VREF =
~
= 1.005V
RINT =
= 100 K
CINT = (0.1) x (20 x 10-6/4)
~
133.333 x 10-3
0.5425 x 10-6
=
(assume VINTMAX = 4V)
(VINTMAX = 4.0V)
total count =
= 245776
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參數(shù)描述
ALD500ASWC 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 17 Bit A/D Processor RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)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(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32
ALD500ASWCL 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 17 Bit A/D Processor RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)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(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32
ALD500AU 制造商:ALD 制造商全稱:Advanced Linear Devices 功能描述:PRECISION INTEGRATING ANALOG PROCESSOR
ALD500AUPC 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 18 Bit A/D Processor RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)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(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32
ALD500AUPCL 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 18 Bit A/D Processor RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結(jié)構(gòu):Sigma-Delta 轉(zhuǎn)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(fēng)格:SMD/SMT 封裝 / 箱體:VQFN-32
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