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PDF MAX1452 Data sheet ( Hoja de datos )
| Número de pieza | MAX1452 | |
| Descripción | Low-Cost Precision Sensor Signal Conditioner | |
| Fabricantes | Maxim Integrated | |
| Logotipo |  |
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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 TA = +25°C, DC parameters only.
A detailed block diagram appears at the end of data sheet.
Pin Configuration
TOP VIEW
ISRC 1
OUT 2
VSS 3
INM 4
BDR 5
INP 6
VDD 7
TEST 8
MAX1452
(NOT TO SCALE)
16 FSOTC
15 AMP+
14 AMP-
13 AMPOUT
12 CLK1M
11 DIO
10 UNLOCK
9 VDDF
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.
1 page  
(VDD = +5V, TA = +25°C, unless otherwise noted.)
OFFSET DAC DNL
5.0
2.5
0
-2.5
-5.0
0
10k 20k 30k 40k 50k 60k 70k
DAC CODE
Low-Cost Precision Sensor
Signal Conditioner
Typical Operating Characteristics
AMPLIFIER GAIN NONLINEARITY
5.0
ODAC = 6800hex
OTCDAC = 0
FSODAC = 4000hex
2.5 FSOTCDAC = 8000hex
IRO = 2hex
PGA = 0
0
-2.5
OUTPUT NOISE
-5.0
-50
-25 0
25
INPUT VOLTAGE [INP-INM] (mV)
50
OUT
10mV/div
400µs/div
C = 4.7µF, RLOAD = 1kΩ
Pin Description
PIN NAME
FUNCTION
1
ISRC
Bridge Drive Current Mode Setting
2
OUT
High ESD and Scan Path Output Signal. May need a 0.1µF capacitor, in noisy environments.
OUT may be parallel connected to DIO.
3 VSS Negative Supply Voltage
4 INM Bridge Negative Input. Can be swapped to INP by configuration register.
5
BDR
Bridge Drive
6 INP Bridge Positive Input. Can be swapped to INM by configuration register.
7 VDD Positive Supply Voltage. Connect a 0.1µF capacitor from VDD to VSS.
8
TEST
Internally Connected. Connect to VSS.
_______________________________________________________________________________________ 5
5 Page 
Low-Cost Precision Sensor
Signal Conditioner
Table 1. EEPROM Memory Address Map
PAGE
0
1
2
3
4
5
6
7
8
9
A
B
LOW-BYTE
ADDRESS (hex)
000
03E
040
07E
080
0BE
0C0
0FE
100
13E
140
15E
160
162
164
166
168
16A
16C
17E
180
19E
1A0
1BE
1C0
1FE
200
23E
240
27E
280
2BE
2C0
2FE
HIGH-BYTE
ADDRESS (hex)
001
03F
041
07F
081
0BF
0C1
0FF
101
13F
141
15F
161
163
165
167
169
16B
16D
17F
181
19F
1A1
1BF
1C1
1FF
201
23F
241
27F
281
2BF
2C1
2FF
TEMP-INDEX[7:0]
(hex)
00
1F
20
3F
40
5F
60
7F
80
9F
A0
AF to FF
CONTENTS
ODAC
Lookup Table
Configuration
Reserved
OTCDAC
Reserved
FSOTCDAC
Control Location
52 General-Purpose
User Bytes
80
8F
90
AF to FF
00
1F
20
3F
40
5F
60
7F
FSODAC
Lookup Table
the serial digital interface during calibration or loaded
automatically from EEPROM at power-on. In this way
the device can be tested and configured during cali-
bration and test and the appropriate compensation val-
ues stored in internal EEPROM. The device will
auto-load the registers from EEPROM and be ready for
use without further configuration after each power-up.
The EEPROM is configured as an 8-bit wide array so
each of the 16-bit registers is stored as two 8-bit quan-
tities. The configuration register, FSOTCDAC and OTC-
______________________________________________________________________________________ 11
11 Page | ||
| Páginas | Total 24 Páginas | |
| PDF Descargar | [ Datasheet MAX1452.PDF ] | |
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