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參數(shù)資料
| 型號(hào)： | ADS7812 |
| 英文描述： | Low-Power, Serial 12-Bit Sampling ANALOG-TO-DIGITAL CONVERTER |
| 中文描述： | 低功耗，串行12位采樣模擬到數(shù)字轉(zhuǎn)換器 |
| 文件頁(yè)數(shù)： | 17/17頁(yè) |
| 文件大?。?/td> | 381K |
| 代理商： | ADS7812 |
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17
ADS7812
the DSP56002 must be programmed to enable the serial
interface when a LOW to HIGH transition on SCI occurs.
The DSP56002 can also provide the CONV signal, as shown
in Figure 17. The receive and transmit sections of the
interface are decoupled (asynchronous mode) and the trans-
mit section is set to generate a word length frame sync every
other transmit frame (frame rate divider set to 2). The
prescale modulus should be set to produce a transmit frame
at twice the desired conversion rate.
APPLICATIONS CIRCUIT
Figure 18 shows a multiplexed data acquisition circuit using
the ADS7812. The MPC508A provides the multiplexing
function while the OPA134 is configured as a Sallen-Key,
two-pole, unity gain lowpass filter.
CONV
BUSY
DATACLK
DATA
CS
EXT/INT
ADS7812
DSP56002
SC2
SC0
SRD
SYN = 0 (Asychronous)
GCK = 1 (Gated clock)
SCD2 = 1 (SC2 is an output)
SHFD = 0 (Shift MSB first)
WL1 = 0 WL0 = 1 (Word length = 12 bits)
FIGURE 17. DSP56002 Interface to the ADS7812. Processor Initiates Conversions.
In 1
In 2
In 3
In 4
In 5
In 6
In 7
In 8
A
0
A
1
A
2
MPC508A
R1
IN
R2
IN
R3
IN
BUF
BUSY
CONV
DATA
DATACLK
ADS7812
OPA134
C
330pF
C
2.2nF
R
1
1.4k
R
2
15.4k
+15V
±10V
Full Scale
–15V
μP
FIGURE 18. Multiplexed Data Acquisition Circuit.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ADS7812P | Low-Power, Serial 12-Bit Sampling ANALOG-TO-DIGITAL CONVERTER |
| ADS7812PB | Low-Power, Serial 12-Bit Sampling ANALOG-TO-DIGITAL CONVERTER |
| ADS7812U | Low-Power, Serial 12-Bit Sampling ANALOG-TO-DIGITAL CONVERTER |
| ADS7812UB | Low-Power, Serial 12-Bit Sampling ANALOG-TO-DIGITAL CONVERTER |
| ADS7813 | Low-Power, Serial 16-Bit Sampling ANALOG-TO-DIGITAL CONVERTER |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ADS7812B/1K | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| ADS7812P | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC Low-Power Serial 12-Bit Sampling 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 |
| ADS7812P | 制造商:Texas Instruments 功能描述:IC 12BIT ADC SERIAL PDIP16 7812 |
| ADS7812PB | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC Low-Power Serial 12-Bit Sampling 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 |
| ADS7812PBG4 | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC Low-Power Serial 12-Bit Sampling 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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