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ADS8411 Datasheet(PDF) 19 Page - Burr-Brown (TI)

[Old version datasheet] Texas Instruments acquired Burr-Brown Corporation. Click here to check the latest version.
Part No. ADS8411
Description  16-BIT, 2 MSPS, UNIPOLAR INPUT, MICRO POWER SAMPLING ANALOG-TO-DIGITAL CONVERTER WITH PARALLEL INTERFACE AND REFERENCE
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Manufacturer  BURR-BROWN [Burr-Brown (TI)]
Direct Link  http://www.burr-brown.com
Logo BURR-BROWN - Burr-Brown (TI)

ADS8411 Datasheet(HTML) 19 Page - Burr-Brown (TI)

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APPLICATION INFORMATION
MICROCONTROLLER INTERFACING
ADS8411 to 8-Bit Microcontroller Interface
CS
RD
CONVST
BUSY
BDGND
+VBD
DB[15:8]
Micro
Controller
RD
GPIO
INT
10
µF
0.1
µF
Analog 5 V
0.1
µF
Digital 3 V
Ext Ref Input
Analog Input
ADS8411
0.1
µF
1
µF
AGND
BDGND
GPIO
BYTE
P[7:0]
GPIO
0.1
µF
1
µF
0.1
µF
10
µF
Analog 5 V
ADS8411
AGND
AGND
PRINCIPLES OF OPERATION
ADS8411
SLAS369B – APRIL 2002 – REVISED DECEMBER 2004
Figure 29 shows a parallel interface between the ADS8411 and a typical microcontroller using the 8-bit data bus.
The BUSY signal is used as a falling-edge interrupt to the microcontroller.
Figure 29. ADS8411 Application Circuitry (using external reference)
Figure 30. Use Internal Reference
The ADS8411 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 29
for the application circuit for the ADS8411.
The conversion clock is generated internally. The conversion time of 400 ns is capable of sustaining a 2-MHz
throughput.
19


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