Datasheet

MAX11618–MAX11621/MAX11624/MAX11625
10-Bit, 300ksps ADCs
with FIFO and Internal Reference
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Detailed Description
The MAX11618–MAX11621/MAX11624/MAX11625 are
low-power, serial-output, multichannel ADCs with FIFO
capability for system monitoring, process-control, and
instrumentation applications. These 10-bit ADCs have
internal track and hold (T/H) circuitry supporting single-
ended inputs. Data is converted from analog voltage
sources in a variety of channel and data-acquisition con-
figurations. Microprocessor (µP) control is made easy
through a 3-wire SPI-/QSPI-/MICROWIRE-compatible
serial interface.
Figure 2 shows a simplified functional diagram of the
MAX11618–MAX11621/MAX11624/MAX11625 internal
architecture. The MAX11624/MAX11625 have 16 sin-
gle-ended analog input channels. The MAX11620/
MAX11621 have 8 single-ended analog input channels.
The MAX11618/MAX11619 have 4 single-ended analog
input channels.
SCLK
DIN
DOUT
CS
t
DH
t
DOE
t
DS
t
CH
t
CL
t
CSS0
t
CP
t
CSH1
t
CSH0
t
CSS1
t
DOD
t
DOT
Figure 1. Detailed Serial-Interface Timing Diagram
10-BIT
SAR
ADC
CONTROL
SERIAL
INTERFACE
OSCILLATOR
FIFO AND
ACCUMULATOR
T/H
CNVST
SCLK
CS
DIN
EOC
DOUT
AIN15
AIN0
AIN1
INTERNAL
REFERENCE
REF
MAX11618–MAX11621
MAX11624/MAX11625
Figure 2. Functional Diagram