MAX11905 Datasheet, PDF (25/29 Pages) Maxim Integrated Products – 20-Bit, 1.6Msps, Low-Power, Fully Differential

MAX11905
20-Bit, 1.6Msps, Low-Power, Fully Differential
SAR ADC
VREF
0.5 x VREF
0V
R
R
VREF +
2-
RS
CS
COG
RS
Figure 13. Unipolar Single-Ended Input
2.7V
2.5V TO
TO
VREFVDD - 0.2V 3.6V 1.8V 1.8V
1.5V TO
3.6V
REFVDD AVDD
REFIN
AIN+
DVDD OVDD
DIN
MAX11905
SCLK
DOUT
AIN-
CNVST
REF REFGND AGND DGND
DSP
SPI
INTERFACE
10µF
+2 x VREF
0V
-2 x VREF
R
4R
R
VREF ⁺
4R
2
-
Figure 14. Bipolar Single-Ended Input
R
R
VREF +
2-
RS
CS
COG
RS
2.7V
2.5V TO
TO
VREFVDD - 0.2V 3.6V 1.8V 1.8V
1.5V TO
3.6V
REFVDD AVDD
REFIN
AIN+
DVDD OVDD
DIN
MAX11905
SCLK
DOUT
AIN-
CNVST
REF REFGND AGND DGND
DSP
SPI
INTERFACE
10µF
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