參數(shù)資料
型號(hào)： MAX1458
廠(chǎng)商： Maxim Integrated Products, Inc.
英文描述： 1%-Accurate, Digitally Trimmed Sensor Signal Conditioner
中文描述： 1%精確度、數(shù)字調(diào)節(jié)傳感器信號(hào)調(diào)理器
文件頁(yè)數(shù)： 1/20頁(yè)
文件大小： 145K
代理商： MAX1458
For the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 408-737-7600 ext. 3468.
General Desc ription
The MAX1458 highly integrated analog-sensor signal
processor is optimized for piezoresistive sensor calibra-
tion and compensation without any external compo-
nents. It includes a programmable current source for
sensor excitation, a 3-bit programmable-gain amplifier
(PGA), a 128-bit internal EEPROM, and four 12-bit
DACs. Achieving a total error factor within 1% of the
sensor’s repeatability errors, the MAX1458 compen-
sates offset, offset temperature coefficient, full-span
output (FSO), FSO temperature coefficient (FSOTC),
and FSO nonlinearity of silicon piezoresistive sensors.
The MAX1458 calibrates and compensates first-order
temperature errors by adjusting the offset and span of
the input signal via digital-to-analog converters (DACs),
thereby eliminating quantization noise. Built-in testabili-
ty features on the MAX1458 result in the integration of
three traditional sensor-manufacturing operations into
one automated process:
Pretest:
Data acquisition of sensor performance
under the control of a host test computer.
Calibration and compensation:
Computation and
storage (in an internal EEPROM) of calibration and
compensation coefficients computed by the test
computer and downloaded to the MAX1458.
Final test operation:
Verification of transducer cali-
bration and compensation without removal from the
pretest socket.
Although optimized for use with piezoresistive sensors,
the MAX1458 may also be used with other resistive
sensors (i.e., accelerometers and strain gauges) with
some additional external components.
______________________Customization
Maxim can customize the MAX1458 for unique require-
ments. With a dedicated cell library consisting of more
than 90 sensor-specific functional blocks, Maxim can
quickly provide customized MAX1458 solutions. Please
contact Maxim for further information.
________________________Applic ations
Piezoresistive Pressure and Acceleration
Transducers and Transmitters
MAP (Manifold Absolute Pressure) Sensors
Automotive Systems
Hydraulic Systems
Industrial Pressure Sensors
Features
o
Medium Accuracy (±1%), Single-Chip Sensor
Signal Conditioning
o
Sensor Errors Trimmed Using Correction
Coefficients Stored in Internal EEPROM—
Eliminates the Need for Laser Trimming and
Potentiometers
o
Compensates Offset, Offset-TC, FSO, FSOTC,
FSO Linearity
o
Programmable Current Source (0.1mA to 2.0mA)
for Sensor Excitation
o
Fast Signal-Path Settling Time (<1ms)
o
Accepts Sensor Outputs from 10mV/V to 40mV/V
o
Fully Analog Signal Path
M
1%-Ac c urate, Digitally Trimmed
S ensor S ignal Conditioner
________________________________________________________________ Maxim Integrated Products
1
16
15
14
13
12
11
10
9
1
2
3
4
5
6
7
8
SCLK
LIMIT
V
DD
INP
BDRIVE
INM
I.C.
OUT
ISRC
TOP VIEW
MAX1458
SSOP
CS
I.C.
DIO
TEMP
FSOTC
WE
V
SS
19-1373; Rev 0; 5/98
PART
MAX1458CAE
MAX1458C/D
MAX1458AAE
*Dice are tested at T
A
= +25°C, DC parameters only.
-40°C to +125°C
0°C to +70°C
0°C to +70°C
TEMP. RANGE
PIN-PACKAGE
16 SSOP
Dice*
16 SSOP
Functional Diagram appears at end of data sheet.
Pin Configuration
Ordering Information
相關(guān)PDF資料
PDF描述
MAX1458AAE 1%-Accurate, Digitally Trimmed Sensor Signal Conditioner
MAX1458CAE 1%-Accurate, Digitally Trimmed Sensor Signal Conditioner
MAX1459 2-Wire, 4-20mA Smart Signal Conditioner
MAX1459AAP 2-Wire, 4-20mA Smart Signal Conditioner
MAX1459CAP 2-Wire, 4-20mA Smart Signal Conditioner
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