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ADS8558 Datenblatt(PDF) 11 Page - Texas Instruments

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Teilenummer ADS8558
Bauteilbeschribung  16-14-12-Bit Six-Channel Simultaneous Sampling ANALOG-TO-DIGITAL CONVERTERS
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Hersteller  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

ADS8558 Datenblatt(HTML) 11 Page - Texas Instruments

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ADS8556
ADS8557
ADS8558
www.ti.com ............................................................................................................................................... SBAS404A – OCTOBER 2006 – REVISED AUGUST 2009
TERMINAL FUNCTIONS
DESCRIPTION
NAME
PIN #
TYPE(1)
PARALLEL INTERFACE (PAR/SER = 0)
SERIAL INTERFACE (PAR/SER = 1)
Hardware mode (HW/SW = 0):
Reference buffers enable input.
When low, all reference buffers are enabled (mandatory if
internal reference is used). When high, all reference buffers
Data bit 14 input/output
DB14/REFBUFEN
1
DIO/DI
are disabled.
Output is '0' for the ADS8557/8
Software mode (HW/SW = 1):Connect to BGND or BVDD.
The reference buffers are controlled by bit C24 (REFBUF) in
control register (CR).
Data bit 13 input/output
Hardware mode (HW/SW = 0): Connect to BGND
DB13/SDI
2
DIO/DI
Output is MSB for the ADS8557 and '0' for the
Software mode (HW/SW = 1): Serial data input
ADS8558
Data bit 12 input/output
DB12
3
DIO
Connect to BGND
Output is '0' for the ADS8558
Data bit 11 input/output
DB11
4
DIO
Connect to BGND
Output is MSB for the ADS8558
When SEL_C = 1, data output for channel C
DB10/SDO_C
5
DIO/DO
Data bit 10 input/output
When SEL_C = 0, this pin should be tied to BGND
When SEL_B = 1, data output for channel B
When SEL_B = 0, this pin should be tied to BGND
DB9/SDO_B
6
DIO/DO
Data bit 9 input/output
When SEL_C = 0, data from channel C1 are also available
on this output
Data output for channel A
When SEL_C = 0, data from channel C0 are also available
DB8/SDO_A
7
DIO/DO
Data bit 8 input/output
on this output
When SEL_C = 0 and SEL_B = 0, SDO_A acts as the single
data output for all channels
BGND
8
P
Buffer IO ground, connect to digital ground plane
Buffer IO supply, connect to digital supply (2.7V to 5.5V). Decouple with a 1
µF ceramic capacitor or a combination
BVDD
9
P
of 100nF and 10
µF ceramic capacitors to BGND.
Word mode (WORD/BYTE = 0):
Data bit 7 input/output
Daisy-chain enable input.
Byte mode (WORD/BYTE = 1):
DB7/HBEN/DCEN
10
DIO/DI/DI
When high, DB[5:3] serve as daisy-chain inputs DCIN[A:C].
High byte enable input.
If daisy-chain mode is not used, connect to BGND.
When high, the high byte is output first on
DB[15:8]. When low, the low byte is output first on
DB[15:8].
Word mode (WORD/BYTE = 0):
Data bit 6 input/output
DB6/SCLK
11
DIO/DI
Serial interface clock input (36MHz max)
Byte mode (WORD/BYTE = 1):
Connect to BGND or BVDD
Word mode (WORD/BYTE = 0):
Data bit 5 input/output
When DCEN = 1, daisy-chain data input for channel A
DB5/DCIN_A
12
DIO/DI
When DCEN = 0, connect to BGND
Byte mode (WORD/BYTE = 1):
Connect to BGND or BVDD
Word mode (WORD/BYTE = 0):
When SEL_B = 1 and DCEN = 1, daisy-chain data input for
Data bit 4 input/output
DB4/DCIN_B
13
DIO/DI
channel B
Byte mode (WORD/BYTE = 1):
When DCEN = 0, connect to BGND
Connect to BGND or BVDD
Word mode (WORD/BYTE = 0):
When SEL_C = 1 and DCEN = 1, daisy-chain data input for
Data bit 3 input/output
DB3/DCIN_C
14
DIO/DI
channel C
Byte mode (WORD/BYTE = 1):
When DCEN = 0, connect to BGND
Connect to BGND or BVDD
Word mode (WORD/BYTE = 0):
Data bit 2 input/output
Select SDO_C input.
DB2/SEL_C
15
DIO/DI
When high, SDO_C is active. When low, SDO_C is disabled.
Byte mode (WORD/BYTE = 1):
Connect to BGND or BVDD
Word mode (WORD/BYTE = 0):
Data bit 1 input/output
Select SDO_B input.
DB1/SEL_B
16
DIO/DI
When high, SDO_B is active. When low, SDO_B is disabled.
Byte mode (WORD/BYTE = 1):
Connect to BGND or BVDD
(1)
AI = analog input; AIO = analog input/output; DI = digital input; DO = digital output; DIO = digital input/output; and P = power supply.
Copyright © 2006–2009, Texas Instruments Incorporated
11
Product Folder Link(s): ADS8556 ADS8557 ADS8558


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