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ADS8528SRGCR Datasheet(PDF) 7 Page - Texas Instruments

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No. de pieza ADS8528SRGCR
Descripción Electrónicos  16-Bit, 8-Channel, Simultaneous Sampling ADCs
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Fabricante Electrónico  TI1 [Texas Instruments]
Página de inicio  http://www.ti.com
Logo TI1 - Texas Instruments

ADS8528SRGCR Datasheet(HTML) 7 Page - Texas Instruments

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7
ADS8528, ADS8548, ADS8568
www.ti.com
SBAS543C – AUGUST 2011 – REVISED FEBRUARY 2016
Product Folder Links: ADS8528 ADS8548 ADS8568
Submit Documentation Feedback
Copyright © 2011–2016, Texas Instruments Incorporated
Pin Functions (continued)
PIN
TYPE(1)
DESCRIPTION
NAME
NO.
PARALLEL INTERFACE (PAR/SER = 0)
SERIAL INTERFACE (PAR/SER = 1)
DB4
29
DIO
Data bit 4 input/output
Connect to DGND
DB5/SEL_CD
28
DIO, DI
Data bit 5 input/output
Select SDO_C and SDO_D input.
When high, data from channel pair C are available on SDO_C and
data from channel pair D are available on SDO_D. When low and
SEL_B = 1, data from channel pairs A and C are available on
SDO_A and data from channel pairs B and D are available on
SDO_B. When low and SEL_B = 0, data from all eight channels
are available on SDO_A.
DB6/SEL_B
27
DIO, DI
Data bit 6 input/output
Select SDO_B input.
When low, SDO_B is disabled and data from all eight channels are
only available through SDO_A.
When high and SEL_CD = 0, data from channel pairs B and D are
available on SDO_B. When SEL_CD = 1, data from channel pair B
are available on SDO_B.
DB7
26
DIO
Data bit 7 input/output
Must be connected to DGND
DB8/DCEN
23
DIO, DI
Data bit 8 input/output
Daisy-chain enable input.
When high, DB[3:0] serve as daisy-chain inputs DCIN_[A:D].
If daisy-chain mode is not used, connect to DGND.
DB9/SDI
22
DIO, DI
Data bit 9 input/output
Hardware mode (HW/SW = 0): connect to DGND.
Software mode (HW/SW = 1): serial data input.
DB10/SCLK
21
DIO, DI
Data bit 10 input/output
Serial interface clock input.
DB11/
REFBUFEN
20
DIO, DI
Data bit 11 input/output.
Output is MSB for the ADS8528.
Hardware mode (HW/SW = 0): reference buffer enable input.
When low, all internal reference buffers are enabled (mandatory if
internal reference is used).
When high, all reference buffers are disabled.
Software mode (HW/SW = 1): connect to DGND or DVDD.
The internal reference buffers are controlled by CONFIG bit C14
(REFBUFEN).
DB12/SDO_A
19
DIO, DO
Data bit 12 input/output.
Output is sign extension for the ADS8528.
Data output for channel pair A.
When SEL_CD = 0, data from channel pair C are also available on
this output.
When SEL_CD = 0 and SEL_B = 0, SDO_A functions as single
data output for all eight channels.
DB13/SDO_B
18
DIO, DO
Data bit 13 input/output.
Output is sign extension for the ADS8528
and MSB for the ADS8548.
When SEL_B = 1, this pin is the data output for channel pair B.
When SEL_B = 0, tie this pin to DGND. When SEL_CD = 0, data
from channel pair D are also available on this output.
DB14/SDO_C
17
DIO, DO
Data bit 14 input/output.
Output is sign extension for the ADS8528
and ADS8548.
When SEL_CD = 1, this pin is the data output for channel pair C.
When SEL_CD = 0, tie this pin to DGND.
DB15/SDO_D
16
DIO, DO
Data bit 15 (MSB) input/output.
Output is sign extension for the ADS8528
and ADS8548.
When SEL_CD = 1, this pin is the data output for channel pair D.
When SEL_CD = 0, tie this pin to DGND.
DGND
24
P
Buffer I/O ground, connect to digital ground plane
DVDD
25
P
Buffer I/O supply, connect to digital supply.
Decouple according to the Power Supply Recommendations section.
HVDD
48
P
Positive supply voltage for the analog inputs.
Decouple according to the Power Supply Recommendations section.
HVSS
1
P
Negative supply voltage for the analog inputs.
Decouple according to the Power Supply Recommendations section.
HW/SW
41
DI
Mode selection input.
When low, hardware mode is selected and the device functions according to the settings of the external pins.
When high, software mode is selected and the device is configured by writing to the Configuration register
(CONFIG).
PAR/SER
8
DI
Interface mode selection input.
When low, the parallel interface is selected. When high, the serial interface is enabled.
RANGE/XCLK
34
DI/DI/DO
Hardware mode (HW/SW = 0): analog input voltage range select input.
When low, the analog input voltage range is ±4 VREF. When high, the analog input voltage range is ±2 VREF.
Software mode (HW/SW = 1): this pin is an external conversion clock input if CONFIG bit C29 = 1 (CLKSEL); or
an internal conversion clock output if CONFIG bit C28 = 1 (CLKOUT_EN).
If this pin is not used, connect to DGND.
RD
12
DI/DI
Read data input.
When low, the parallel data output is
enabled (if CS = 0). When high, the data
output is disabled.
Must be connected to DGND.


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