MAX1452
Low-Cost Precision Sensor
Signal Conditioner
________________________________________________________________ Maxim Integrated Products 1
19-1829; Rev 1; 6/01
EVALUATION KIT
AVAILABLE
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
temperature compensation that enables an overall per-
formance 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 with the integrated 16-bit
DACs. Offset and span are calibrated using 16-bit
DACs, allowing sensor products to be truly inter-
changeable.
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
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
a111 Provides Amplification, Calibration, and
Temperature Compensation
a111 Accommodates Sensor Output Sensitivities
from 1mV/V to 40mV/V
a111 Single Pin Digital Programming
a111 No External Trim Components Required
a111 16-Bit Offset and Span Calibration Resolution
a111 Fully Analog Signal Path
a111 On-Chip Lookup Table Supports Multipoint
Calibration Temperature Correction
a111 Supports Both Current and Voltage Bridge
Excitation
a111 Fast 3.2kHz Frequency Response
a111 On-Chip Uncommitted Op Amp
a111 Secure-Lock™ Prevents Data Corruption
a111 Low 2mA Current Consumption
Rail-to-Rail is a trademark of Nippon Motorola Ltd.
Secure-Lock is a trademark of Maxim Integrated Products.
16
15
14
13
12
11
10
9
1
2
3
4
5
6
7
8
ISRC FSOTC
AMP+
AMP-
AMPOUT
CLK1M
DIO
UNLOCK
V
DDF
TOP VIEW
MAX1452
(NOT TO SCALE)
SSOP
OUT
V
SS
INP
INM
BDR
V
DD
TEST
Pin Configuration
Ordering Information
16 SSOP
PIN-PACKAGETEMP. RANGE
0°C to +70°CMAX1452CAE
PART
16 SSOP-40°C to +85°CMAX1452EAE
16 SSOP-40°C to +125°CMAX1452AAE
Dice*0°C to +70°CMAX1452C/D
*Dice are tested at T
A
= +25°C, DC parameters only.
A detailed block diagram appears at the end of data sheet.
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.