ADS5409 Datasheet, PDF (31/41 Pages) Texas Instruments – Dual Channel 12-Bit 900Msps Analog-to-Digital Converter

ADS5409
www.ti.com
SLAS935 – MAY 2013
Register
Address
Register Data
A7-A0 in D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
hex
2
0
0
0
0
0
Over-range threshold
0
0
0
0
0
0
0
D10-D7 Over-range threshold
Default 1111
The over-range detection is triggered 12 output clock cycles after the
overload condition occurs. The threshold at which the OVR is triggered =
1.0V x [decimal value of <Over-range threshold>]/16. After power up or
reset, the default value is 15 (decimal) which corresponds to a OVR
threshold of 0.56dB below fullscale (20*log(15/16)). This OVR threshold is
applicable to both channels.
OVR Detection Threshold
0
-5
-10
-15
-20
-25
0
2
4
6
8
10
12
14
16
Programmed Value (1-15)
Register
Address
Register Data
A7-A0 in D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
hex
3
0 Start 0
0
1
0
1
1
0
0
0
1
1
0
0
0
Auto
Coff
ChA
D14
Start Auto Corr ChA
Starts DC offset and Gain correction loop for ChA
Default 1
0
Starts the DC offset and Gain correction loops
1
Clears DC offset correction value to 0 and Gain correction value to 1
D11, 9, 8, 4, 3 Must be set to 1 for maximum performance
Default 1
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