MAX11902 Datasheet, PDF (15/29 Pages) Maxim Integrated Products – Fully Differential SAR ADC

MAX11902
18-Bit, 1Msps, Low-Power,
Fully Differential SAR ADC
REFVDD
D1
RON = 260Ω
AIN+
CIN = 30pF
D2
VDC
REFVDD
D1
RON = 260Ω
AIN-
CIN = 30pF
D2
Figure 2. Simplified Model of Input Sampling Circuit
SAR Conversion
Sample 1
CNVST
1/Sample Rate
Track
Read Data
SAR Conversion
Sample 2
1/Sample Rate
Track
Read Data
SCLK
DOUT
Sample 1
MSB MSB-1
LSB+1 LSB
Reading sample1 during track
Sample 2
MSB MSB-1
LSB+1 LSB
Reading sample 2 during track
Figure 3. Conversion Frame, SAR Conversion, Track and Read Operation
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