參數資料
型號: ADS7812U
廠商: Texas Instruments
文件頁數: 9/24頁
文件大?。?/td> 0K
描述: IC LP SERIAL 12-BIT A/D 16-SOIC
產品培訓模塊: Data Converter Basics
標準包裝: 40
位數: 12
采樣率(每秒): 40k
數據接口: 串行,SPI?
轉換器數目: 1
功率耗散(最大): 35mW
電壓電源: 單電源
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 16-SOIC(0.295",7.50mm 寬)
供應商設備封裝: 16-SOIC
包裝: 管件
輸入數目和類型: 3 個單端,單極;3 個單端,雙極
產品目錄頁面: 891 (CN2011-ZH PDF)
ADS7812
17
SBAS042A
www.ti.com
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
2
330pF
C
1
2.2nF
R
1
1.4k
R
2
15.4k
+15V
±10V
Full Scale
–15V
P
FIGURE 18. Multiplexed Data Acquisition Circuit.
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相關代理商/技術參數
參數描述
ADS7812U 制造商:Texas Instruments 功能描述:A/D Converter (A-D) IC 制造商:Texas Instruments 功能描述:IC, ADC, 12BIT, 40KSPS, SOIC-16
ADS7812U/1K 功能描述:模數轉換器 - ADC Low-Pwr Serial 12B Sampling ADC Cnvrtr RoHS:否 制造商:Texas Instruments 通道數量: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
ADS7812U/1KE4 功能描述:模數轉換器 - ADC Low-Power Serial 12-Bit Sampling RoHS:否 制造商:Texas Instruments 通道數量: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
ADS7812U/1KG4 功能描述:模數轉換器 - ADC Low-Pwr Serial 12B Sampling ADC Cnvrtr RoHS:否 制造商:Texas Instruments 通道數量: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
ADS7812UB 功能描述:模數轉換器 - ADC Low-Power Serial 12-Bit Sampling RoHS:否 制造商:Texas Instruments 通道數量: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