MAX1454_11 Datasheet, PDF (1/25 Pages) Maxim Integrated Products – Precision Sensor Signal Conditioner with Overvoltage Protection

19-5945 Rev 0; 6/11
EVALUATION KIT AVAILABLE
MAX1454
Precision Sensor Signal Conditioner
with Overvoltage Protection
General Description
The MAX1454 is a highly integrated analog sensor
signal conditioner targeted for automotive applications.
The device provides amplification, calibration, and tem-
perature compensation to enable an overall performance
approaching the inherent repeatability of the sensor. The
fully analog signal path introduces no quantization noise
in the output signal while enabling digitally controlled
trimming of the output. Offset and span are calibrated
with integrated 16-bit DACs, allowing sensors to be truly
interchangeable.
The device architecture includes a programmable sen-
sor excitation, a 32-step programmable-gain amplifier
(PGA), a 2K x 8 bits internal flash memory, four 16-bit
DACs, and an on-chip temperature sensor. In addition
to offset and span compensation, the device provides a
unique temperature-compensation method for offset TC
and FSO TC to provide a remarkable degree of flexibility
while minimizing manufacturing costs.
The device is packaged in a 16-pin TSSOP and covers
the automotive AEC-Q100 Grade 1 temperature range of
-40NC to +125NC.
Applications
Pressure Sensors
Strain Gauges
Pressure Calibrators and Controllers
Resistive Element Sensors
Humidity Sensors
Benefits and Features
S Complete Signal Conditioning in a Single IC
Package
 Provides Amplification, Calibration, and
Temperature Compensation
 Accommodates Sensor Output Sensitivities
from 1mV/V to 200mV/V
 Overvoltage Protection to 45V
 Reverse-Voltage Protection to 45V
S High-Precision Compensation Reduces
Downstream Circuit Complexity
 Fully Analog Signal Path
 16-Bit Offset and Span-Calibration Resolution
 On-Chip Lookup Table Supports Multipoint
Calibration Temperature Correction
S Supports Both Current and Voltage-Bridge
Excitation
S Fast 85µs Step Response
S Sensor Fault Detection
S Simple PCB Layout
S Single-Pin Digital Programming
S No External Trim Components Required
Ordering Information appears at end of data sheet.
For related parts and recommended products to use with this part,
refer to www.maxim-ic.com/MAX1454.related.
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For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.