參數(shù)資料
型號(hào)： MAX1478
廠商： Maxim Integrated Products, Inc.
英文描述： 1% Accurate, Digitally Trimmed,Rail-to-Rail Sensor Signal Conditioner
中文描述： 1%精確度、數(shù)字校準(zhǔn)、滿擺幅傳感器信號(hào)調(diào)理器
文件頁(yè)數(shù)： 16/20頁(yè)
文件大?。?/td> 210K
代理商： MAX1478
M
Ratiometric Output Configuration
Ratiometric output configuration provides an output that
is proportional to the power-supply voltage. When used
with ratiometric A/D converters, this output provides
digital pressure values independent of supply voltage.
Most automotive and some industrial applications
require ratiometric outputs.
The MAX1478 provides a high-performance ratiometric
output with a minimum number of external components
(Figure 10). These external components include the fol-
lowing:
One power-supply bypass capacitor (C1)
Two optional resistors, one from FSOTC to ISRC, and
another from ISRC to V
SS
, depending on the sensor
type
One optional capacitor (C2) from BDRIVE to V
SS
Test System Configuration
The MAX1478 is designed to support an automated
production pressure-temperature test system with inte-
grated calibration and temperature compensation.
Figure 11 shows the implementation concept for a low-
cost test system capable of testing up to 12 transducer
modules connected in parallel. The test system shown
in Figure 11 includes a dedicated test bus consisting of
four wires:
Two power-supply lines
Two serial-interface lines: DIO (input/output) and
SCLK (clock)
An individual V
OUT
line
For simultaneous testing of more than 12 sensor mod-
ules, use buffers to prevent overloading the data bus. A
digital multiplexer controls the chip-select signal for
each transducer.
1% Accurate, Digitally Trimmed,
Rail-to-Rail Sensor Signal Conditioner
16
______________________________________________________________________________________
MAX1478
1
1
C
1
O
(
1
FSOTC
TEMP
A = 1
V
SS
+5V
OUT
V
DD
DIGITAL
INTERFACE
PGA
CS
WE
TEMP
SCLK
DIO
BDRIVE
INP
ISRC
INM
C2
0.1
μ
F
C1
0.1
μ
F
V
SS
R
ISRC
R
FTC
R
ISRC
R
FTC
128-BIT
EEPROM
V
DD
Σ
SENSOR
Figure 10. Basic Ratiometric Output Configuration
相關(guān)PDF資料
PDF描述
MAX1478AAE 1% Accurate, Digitally Trimmed,Rail-to-Rail Sensor Signal Conditioner
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