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參數(shù)資料
| 型號： | ADS8406IPFFBR |
| 英文描述： | 16-BIT, 1.25 MSPS, PSEUDO-BIPOLAR, FULLY DIFFERENTIAL INPUT, MICRO POWER SAMPLING ANALOG-TO-DIGITAL CONVERTER WITH PARALLEL INTERFACE |
| 中文描述： | 16位，1.25 MSPS的，偽雙極，全差分輸入，微功耗采樣模擬到數(shù)字轉(zhuǎn)換并行接口 |
| 文件頁數(shù)： | 18/25頁 |
| 文件大小： | 536K |
| 代理商： | ADS8406IPFFBR |
www.ti.com
APPLICATION INFORMATION
MICROCONTROLLER INTERFACING
ADS8406 to 8-Bit Microcontroller Interface
CS
BYTE
RD
CONVST
BUSY
BDGND
+VBD
DB[15:8]
Micro
Controller
RD
GPIO
INT
10
μ
F
0.1
μ
F
Analog 5 V
0.1
μ
F
Digital 3 V
Ext Ref Input
Analog Input
+
R
A
+
ADS8406
0.1
μ
F
R
1
μ
F
AGND
BDGND
GPIO
P[7:0]
GPIO
+
R
R
R
A
0.1
μ
F
1
μ
F
0.1
μ
F
10
μ
F
Analog 5 V
ADS8406
AGND
AGND
PRINCIPLES OF OPERATION
ADS8406
SLAS426A–AUGUST 2004–REVISED DECEMBER 2004
Figure 31 shows a parallel interface between the ADS8406 and a typical microcontroller using the 8-bit data bus.
The BUSY signal is used as a falling-edge interrupt to the microcontroller.
Figure 31. ADS8406 Application Circuitry (using external reference)
Figure 32. Use Internal Reference
The ADS8406 is a high-speed successive approximation register (SAR) analog-to-digital converter (ADC). The
architecture is based on charge redistribution, which inherently includes a sample/hold function. See Figure 31
for the application circuit for the ADS8406.
The conversion clock is generated internally. The conversion time of 650 ns is capable of sustaining a 1.25-MHz
throughput.
18
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