The MAX1146–MAX1149 low-power, 14-bit, multichannel,
analog-to-digital converters (ADCs) feature an
internal track/hold (T/H), voltage reference, and clock.
The MAX1146/MAX1148 operate from a single +4.75V
to +5.25V supply, and the MAX1147/MAX1149 operate
from a single +2.7V to +3.6V supply. All analog inputs
are software configurable for unipolar/bipolar and single-ended/differential operation.
The 4-wire serial interface connects directly to
SPI™/QSPI™/MICROWIRE™ devices without external
logic. The serial strobe output (SSTRB) allows convenient
connection to digital signal processors. The
MAX1146–MAX1149 use an internal clock or an external
serial-interface clock to perform successive-approximation
analog-to-digital conversions.
The MAX1146/MAX1148 include an internal +4.096V
reference, while the MAX1147/MAX1149 include an
internal +2.500V reference. All devices accept an external
reference from 1.5V to VDD.
The MAX1146–MAX1149 provide a hardware shutdown
and two software power-down modes. Using the software
power-down modes allows the devices to be powered
down between conversions. When powered down,
accessing the serial interface automatically powers up
the devices. The quick turn-on time allows power-down
between all conversions. This technique reduces supply
current to under 120µA for quick turn-on.
The MAX1146–MAX1149 are available in a 20-pin
TSSOP package.
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