ADS5400-SP_15 Datasheet, PDF (19/47 Pages) Texas Instruments – 12-Bit, 1-GSPS Analog-to-Digital Converter

ADS5400-SP
www.ti.com
Description of Serial Registers
Each register function is explained in detail below.
SLAS669D – SEPTEMBER 2010 – REVISED JANUARY 2014
Address (hex)
0x00
Defaults
BIT <7:0>
Table 5. Serial Register 0x00 (Read or Write)
BIT 7
0
BIT 6
0
BIT 5
0
BIT 4
BIT 3
BIT 2
Analog Gain Adjustment bits<11:4>
0
0
0
BIT 1
0
Analog gain adjustment (most significant 8 bits of a 12 bit word)
All 12-bits in this adjustment in address 0x00 and 0x01 set to 0000
0000 0000 = fullscale analog input 2.0V_PP
All 12-bits in this adjustment in address 0x00 and 0x01 set to 1111
1111 1111 = fullscale analog input 1.52V_PP
Step adjustment resolution is 120µV.
Can be used for one-time setting or continual calibration of analog
signal path gain.
BIT 0
0
Address (hex)
0x01
Defaults
BIT <0:1>
0
1
BIT <2>
0
1
BIT <3>
0
1
BIT <7:4>
Table 6. Serial Register 0x01 (Read or Write)
BIT 7
BIT 6
BIT 5
BIT 4
Analog Gain Adjustment bits<3:0>
0
0
0
0
BIT 3
3 or 4-pin SPI
0
BIT 2
SPI Reset
0
RESERVED
set to 0 if writing this register
do not set to 1
BIT 1
0
0
SPI Register Reset
altered register settings are kept
resets all SPI registers to defaults (self clearing)
Set SPI mode to 3- or 4-pin
3-pin SPI (read/write on SDIO, SDO not used)
4-pin SPI (SDIO is write, SDO is read)
Analog gain adjustment continued (least significant 4 bits of a 12-
bit word)
All 12-bits in this adjustment in address 0x00 and 0x01 set to 0000
0000 0000 = fullscale analog input 2V_PP
All 12-bits in this adjustment in address 0x00 and 0x01 set to 1111
1111 1111 = fullscale analog input 1.52V_PP
Step adjustment resolution is 120µV.
Can be used for one-time setting or continual calibration of analog
signal path gain.
BIT 0
0
0
Copyright © 2010–2014, Texas Instruments Incorporated
19
Product Folder Links: ADS5400-SP