MAX1452_09 Datasheet, PDF (1/25 Pages) Maxim Integrated Products – Low-Cost Precision Sensor Signal Conditioner

19-1829; Rev 2; 4/09
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Low-Cost Precision Sensor
Signal Conditioner
General Description
The MAX1452 is a highly integrated analog-sensor sig-
nal processor optimized for industrial and process con-
trol applications utilizing resistive element sensors. The
MAX1452 provides amplification, calibration, and tem-
perature compensation that enables an overall perfor-
mance approaching the inherent repeatability of the
sensor. The fully analog signal path introduces no quan-
tization noise in the output signal while enabling digitally
controlled trimming with the integrated 16-bit DACs.
Offset and span are calibrated using 16-bit DACs,
allowing sensor products to be truly interchangeable.
The MAX1452 architecture includes a programmable
sensor excitation, a 16-step programmable-gain ampli-
fier (PGA), a 768-byte (6144 bits) internal EEPROM,
four 16-bit DACs, an uncommitted op amp, and an on-
chip temperature sensor. In addition to offset and span
compensation, the MAX1452 provides a unique tem-
perature compensation strategy for offset TC and
FSOTC that was developed to provide a remarkable
degree of flexibility while minimizing testing costs.
The MAX1452 is packaged for the commercial, industri-
al, and automotive temperature ranges in 16-pin SSOP/
TSSOP and 24-pin TQFN packages.
Customization
Maxim can customize the MAX1452 for high-volume
dedicated applications. Using our dedicated cell library
of more than 2000 sensor-specific functional blocks,
Maxim can quickly provide a modified MAX1452 solu-
tion. Contact Maxim for further information.
Applications
Pressure Sensors
Transducers and Transmitters
Strain Gauges
Pressure Calibrators and Controllers
Resistive Elements Sensors
Accelerometers
Humidity Sensors
Outputs Supported
4–20mA
0 to +5V (rail-to-rail)
+0.5V to +4.5V Ratiometric
+2.5V to ±2.5V
Features
o Provides Amplification, Calibration, and
Temperature Compensation
o Accommodates Sensor Output Sensitivities
from 4mV/V to 60mV/V
o Single Pin Digital Programming
o No External Trim Components Required
o 16-Bit Offset and Span Calibration Resolution
o Fully Analog Signal Path
o On-Chip Lookup Table Supports Multipoint
Calibration Temperature Correction
o Supports Both Current and Voltage Bridge
Excitation
o Fast 150µs Step Response
o On-Chip Uncommitted Op Amp
o Secure-Lock™ Prevents Data Corruption
o Low 2mA Current Consumption
Ordering Information
PART
TEMP RANGE
PIN-PACKAGE
MAX1452CAE+
0°C to +70°C
16 SSOP
MAX1452EAE+
-40°C to +85°C
16 SSOP
MAX1452AAE+
-40°C to +125°C 16 SSOP
MAX1452AUE+
-40°C to +125°C 16 TSSOP
MAX1452ATG+
-40°C to +125°C 24 TQFN-EP*
MAX1452C/D
0°C to +70°C
Dice**
+Denotes a lead(Pb)-free/RoHS-compliant package.
*EP = Exposed pad.
**Dice are tested at T_A = +25°C, DC parameters only.
Detailed Block Diagram and Pin Configurations appear at
the end of data sheet.
Secure-Lock is a trademark of Maxim Integrated Products.
________________________________________________________________ Maxim Integrated Products 1
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.