MAX1452 Datasheet, PDF (1/24 Pages) Maxim Integrated Products – Low-Cost Precision Sensor Signal Conditioner

19-1829; Rev 1; 6/01
EVAALVUAAILTAIOBNLEKIT
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
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
Rail-to-Rail is a trademark of Nippon Motorola Ltd.
Secure-Lock is a trademark of Maxim Integrated Products.
Features
o Provides Amplification, Calibration, and
Temperature Compensation
o Accommodates Sensor Output Sensitivities
from 1mV/V to 40mV/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 3.2kHz Frequency Response
o On-Chip Uncommitted Op Amp
o Secure-Lock™ Prevents Data Corruption
o Low 2mA Current Consumption
Ordering Information
PART
MAX1452CAE
MAX1452EAE
MAX1452AAE
MAX1452C/D
TEMP. RANGE
0°C to +70°C
-40°C to +85°C
-40°C to +125°C
0°C to +70°C
PIN-PACKAGE
16 SSOP
16 SSOP
16 SSOP
Dice*
*Dice are tested at T_A = +25°C, DC parameters only.
A detailed block diagram appears at the end of data sheet.
Pin Configuration
TOP VIEW
ISRC 1
OUT 2
V_SS 3
INM 4
BDR 5
INP 6
V_DD 7
TEST 8
MAX1452
(NOT TO SCALE)
16 FSOTC
15 AMP+
14 AMP-
13 AMPOUT
12 CLK1M
11 DIO
10 UNLOCK
9 V_DDF
SSOP
________________________________________________________________ Maxim Integrated Products 1
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.