Specifications

Sensors
Pressure sensors and weigh scales (force sensing)
66 Maxim Industrial Solutions
Benefits
• Saves cost and board space by
interfacing directly with a micropro-
cessor or control unit
– SPI-compatible interface eliminates
need for interface stage
– GPIO terminals facilitate instrument
control, system warning, and two-way
signaling
• Multichannel functionality reduces
BOM cost, improves performance, and
saves space
– Use one multichannel device instead of
multiple devices , so measurements are
more comparable and costs lowered
– Highly integrated conditioner minimizes
component requirements and saves
board space
– No external trim components required
for a calibrated and accurate output
• Adaptable compensation algorithm
optimizes sensor performance
– User can customize the compensation
algorithm suitable for the application
– Compensation algorithm is stored in
on-chip nonvolatile (NV) flash memory
• Reduces product development time
– Flexible for use in products requiring
digital output, voltage output, PWM
output, or a 4–20mA current loop
– Integrated microprocessor with only 16
instructions makes programming easy
– Suitable for use with many types of
transducers
MAX1464
The MAX1464 is a highly integrated, digital, multichannel sensor signal
conditioner optimized for industrial process-control and automotive
applications. Typical implementations include pressure sensing, RTD
and thermocouple linearization, weight sensing/classification, and
remote process monitoring with limit indication. The MAX1464
simplifies designs and improves manufacturing efficiency by accepting
sensors with either single-ended or differential outputs. It provides
comprehensive temperature compensation without requiring any
external trim components. A calibrated output signal can be driven
independently through an SPI-compatible interface, voltage-output
DACs, or PWM terminals. The MAX1464 integrates a 16-bit CPU; 4kB of
flash memory for a user-programmable compensation algorithm and
128 bytes for user information; and two general-purpose inputs/
outputs (GPIOs). It has a flexible dual op-amp output block and
supports 4–20mA applications.
Low-power, low-noise, multichannel sensor signal processor saves cost and
board space
(Block diagram on next page)