MAX1245 Datasheet, PDF (18/20 Pages) Maxim Integrated Products – +2.375V, Low-Power, 8-Channel, Serial 12-Bit ADC

+2.375V, Low-Power, 8-Channel,
Serial 12-Bit ADC
ANALOG
INPUTS
+2.5V +3V
1 _CH0
2 _CH1
V_DD 20
SCLK 19
3 CH2
CS 18
4 CH3 _MAX1245 DIN 17
5 CH4
SSTRB 16
6 CH5
DOUT 15
7 CH6
DGND 14
8 CH7
AGND 13
9 COM
10 SHDN
V_DD 12
VREF 11
0.1µF
0.1µF
+2.048V
4.7µF
(POWER SUPPLIES)
SCK
PCS0
MOSI
MC683XX
MISO
(GND)
CLOCK CONNECTIONS NOT SHOWN
Figure 17. MAX1245 QSPI Connections
High-Speed Digital Interfacing with QSPI
The MAX1245 can interface with QSPI using the circuit in
Figure 17 (fSCLK = 1.5MHz, CPOL = 0, CPHA = 0). This
QSPI circuit can be programmed to do a conversion on
each of the eight channels. The result is stored in memory
without taxing the CPU, since QSPI incorporates its own
micro-sequencer.
Because the maximum external clock frequency is
1.5MHz, the MAX1245 is QSPI compatible up to 1.5MHz.
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