The MAX144/MAX145 low-power, 12-bit analog-to-digital
converters (ADCs) are available in 8-pin µMAX®
and DIP packages. Both devices operate with a single
+2.7V to +5.25V supply and feature a 7.4µs successive-
approximation ADC, automatic power-down, fast
wake-up (2.5µs), an on-chip clock, and a high-speed,
3-wire serial interface.
Power consumption is only 3.2mW (VDD = +3.6V) at the
maximum sampling rate of 108ksps. At slower throughput
rates, the automatic shutdown (0.2µA) further
reduces power consumption.
The MAX144 provides 2-channel, single-ended operation
and accepts input signals from 0 to VREF. The
MAX145 accepts pseudo-differential inputs ranging
from 0 to VREF. An external clock accesses data-through
the 3-wire serial interface, which is SPI™,
QSPI™, and MICROWIRE™-compatible.
Excellent dynamic performance and low power, combined
with ease of use and small package size, make
these converters ideal for battery-powered and data-acquisition
applications, or for other circuits with
demanding power-consumption and space requirements.
For pin-compatible 10-bit ADCs, see the
MAX157 and MAX159 data sheets.
Key Features
Applications/Uses
Single-Supply Operation (+2.7V to +5.25V)
Two Single-Ended Channels (MAX144) One Pseudo-Differential Channel (MAX145)
Low Power
0.9mA (108ksps, +3V Supply)
100µA (10ksps, +3V Supply)
10µA (1ksps, +3V Supply)
0.2µA (Power-Down Mode)
Internal Track/Hold
108ksps Sampling Rate
SPI/QSPI/MICROWIRE-Compatible 3-Wire Serial Interface
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