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參數(shù)資料
| 型號： | DDC112U/1K |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | ADC |
| 英文描述： | 2-CH 20-BIT DELTA-SIGMA ADC, SERIAL ACCESS, PDSO28 |
| 封裝： | GREEN, PLASTIC, SOIC-28 |
| 文件頁數(shù)： | 7/34頁 |
| 文件大小： | 776K |
| 代理商： | DDC112U/1K |
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DDC112
15
SBAS085B
www.ti.com
determines the boundary between the cont and ncont modes
described earlier in the Overview section. DVALID goes
LOW after CONV toggles in time t7, indicating that data is
ready to be retrieved. As shown in Figure 10, there are two
values for t7, depending on TINT. The reason for this will be
discussed in the Special Considerations section.
Figure 11 shows the result of inverting the logic level of
CONV. The only difference is in the first three states. After-
wards, the states toggle between 4 and 5 just as in the
previous example. Figure 12 shows the timing diagram of the
internal operations occurring during continuous mode opera-
tion.
FIGURE 11. Continuous Mode Timing (CONV LOW at power-up).
5
6
7
84
5
Integrate A
Integrate B
Integrate A
m/r/az B
m/r/az A
m/r/az B
CONV
State
Integration
Status
m/r/az
Status
mbsy
DVALID
t6
t7
t = 0
Power-Up
Side B
Data
Side A
Data
Side B
Data
FIGURE 12. Timing Diagram of the Internal Operation in Continuous Mode of the DDC112.
t
12
t
12
t
14
t
13
T
INT
T
INT
End Integration Side A
Start Integration Side B
Side A
Data Ready
Side B
Data Ready
Side B
Side A
Side B
Side A
End Integration Side B
Start Integration Side A
End Integration Side A
Start Integration Side B
CONV
DVALID
A/D Conversion
Input 1 (Internal)
A/D Conversion
Input 2 (Internal)
CLK = 10MHz
CLK = 15MHz
SYMBOL
DESCRIPTION
MIN
TYP
MAX
MIN
TYP
MAX
UNITS
TINT
Integration Period (continuous mode)
500
1,000,000
333
1,000,000
s
t12
A/D Conversion Time (internally controlled)
202.2
134.8
s
t13
A/D Conversion Reset Time (internally controlled)
13.2
8.8
s
t14
Integrator and A/D Conversion Reset Time
61.8
41.2
s
(internally controlled)
TABLE VI. Timing for the Internal Operation in the Continuous Mode.
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相關(guān)代理商/技術(shù)參數(shù) |
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| DDC112UG4 | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC Dual Current Input 20-Bit 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 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| DDC112UK | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC Dual Current Input 20-Bit 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 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| DDC112UK | 制造商:Texas Instruments 功能描述:DUAL CURRENT INPUT 20 BIT ANALOG/DIGITAL |
| DDC112UK | 制造商:Texas Instruments 功能描述:20BIT ADC DUAL SMD SOIC28 112 |
| DDC112UK/1K | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC Dual Current Input 20-Bit 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 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
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