MAX1455AUE+ Maxim Integrated Products, MAX1455AUE+ Datasheet - Page 22

• Manufacturer Part Number: MAX1455AUE+
• Description: IC AUTO SNSR SIGNAL COND 16TSSOP
• Manufacturer: Maxim Integrated Products
• Type: Automotiver

Specifications of MAX1455AUE+

• Input Type: Analog
• Output Type: Analog
• Current - Supply: 6mA
• Mounting Type: Surface Mount
• Package / Case: 16-TSSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Interface: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

•
•
The MAX1455 temperature compensation design cor-
rects both sensor and IC temperature errors. This
enables the MAX1455 to provide temperature compen-
sation approaching the inherent repeatability of the
sensor. An example of the MAX1455’s capabilities is
shown in Figure 8. Table 16 lists the effects of compen-
sation.
A MAX1455 and a repeatable piezoresistive sensor with
an initial offset of 16.4mV and a span of 55.8mV were
converted into a compensated transducer with an offset
of 0.5000V and a span of 4.0000V. Nonlinear sensor
offset and FSO temperature errors, which were on the
order of 20% to 30% FSO, were reduced to under
±0.1% FSO. Figure 8 shows the output of the uncom-
pensated sensor and the output of the compensated
transducer. Six temperature points were used to obtain
this result.
To expedite the development of MAX1455-based
transducers and test systems, Maxim has produced the
Low-Cost Automotive Sensor Signal
Conditioner
22
Figure 8. Comparison of an Uncalibrated Sensor and a Calibrated Transducer
Download correction coefficients to EEPROM.
Perform a final test.
______________________________________________________________________________________
-0.05
-0.10
-0.15
0.15
0.10
0.05
80
60
40
20
0
0
MAX1455 Evaluation Kit
-50
0
COMPENSATED TRANSDUCER ERROR
FSO
20
RAW SENSOR OUTPUT
Compensation Example
0
Sensor Calibration and
OFFSET
TEMPERATURE (°C)
PRESSURE (kps)
(T
40
A
= +25°C)
50
60
100
80
100
150
MAX1455 evaluation kit (EV kit). First-time users of the
MAX1455 are strongly encouraged to use this kit.
The EV kit is designed to facilitate manual programming
of the MAX1455 with a sensor. It includes the following:
1) Evaluation board with or without a silicon pressure
2) Design/applications manual. This manual was
3) MAX1455 communication software, which enables
4) Interface adapter, which allows the connection of
TRANSISTOR COUNT: 62,242
PROCESS: CMOS
SUBSTRATE CONNECTED TO: V
-10
-20
30
20
10
0
5
4
3
2
1
0
sensor, ready for customer evaluation.
developed for test engineers familiar with data
acquisition of sensor data and provides sensor
compensation algorithms and test procedures.
programming of the MAX1455 from a computer key-
board (IBM compatible), one module at a time.
the evaluation board to a PC serial port.
-50
0
COMPENSATED TRANSDUCER
FSO
UNCOMPENSATED SENSOR
20
TEMPERATURE ERROR
0
(T
OFFSET
TEMPERATURE (°C)
A
PRESSURE (kps)
40
= +25°C)
50
60
Chip Information
100
80
SS
150
100