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ADS5545 Datasheet(PDF) 14 Page - Texas Instruments

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Part No. ADS5545
Description  11-BIT, 200 MSPS ADC
Download  54 Pages
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Maker  TI [Texas Instruments]
Homepage  http://www.ti.com
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ADS5545 Datasheet(HTML) 14 Page - Texas Instruments

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REGISTER INITIALIZATION
Register Address
RegisterData
t
(SCLK)
t
(DSU)
t
(DH)
t
(SLOADS)
D7
A7
D3
A3
D5
A5
D1
A1
D6
A6
D2
A2
D4
A4
D0
A0
SDATA
SCLK
SEN
RESET
t
(SLOADH)
SERIAL INTERFACE TIMING CHARACTERISTICS
ADS5517
SLWS203 – DECEMBER 2007
After power-up, the internal registers must be reset to their default values. This is done in one of two ways:
1. Either through hardware reset by applying a high-going pulse on RESET pin (of width greater than 10 ns) as
shown in Figure 5.
OR
2. By applying software reset. Using the serial interface, set the <RST> bit (D1 in register 0x6C) to high. This
initializes the internal registers to their default values and then self-resets the <RST> bit to low. In this case
the RESET pin is kept low.
Figure 5. Serial Interface Timing Diagram
Typical values at 25
°C, min and max values across the full temperature range T
MIN = –40°C to TMAX = 85°C,
AVDD = DRVDD = 3.3 V (unless otherwise noted)
MIN
TYP
MAX
UNIT
fSCLK
SCLK frequency
> DC
20
MHz
tSLOADS
SEN to SCLK setup time
25
ns
tSLOADH
SCLK to SEN hold time
25
ns
tDSU
SDATA setup time
25
ns
tDH
SDATA hold time
25
ns
14
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Copyright © 2007, Texas Instruments Incorporated
Product Folder Link(s): ADS5517


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