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参数资料
| 型号： | MAX1452CAE+TC8H |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 23/25页 |
| 文件大小： | 0K |
| 描述： | IC SENSOR SIGNAL COND 16SSOP |
| 标准包装： | 2,000 |
| 系列： | * |
MAX1452
Low-Cost Precision Sensor
Signal Conditioner
7
Maxim Integrated
sensor bridge excitation current or voltage. The PGA
utilizes a switched capacitor CMOS technology, with an
input referred offset trimming range of more than
±150mV with an approximate 3V resolution (16 bits).
The PGA provides gain values from 39V/V to 234V/V in
16 steps.
The MAX1452 uses four 16-bit DACs with calibration
coefficients stored by the user in an internal 768 x 8
EEPROM (6144 bits). This memory contains the follow-
ing information, as 16-bit wide words:
Configuration Register
Offset Calibration Coefficient Table
Offset Temperature Coefficient Register
FSO (Full-Span Output) Calibration Table
FSO Temperature Error Correction Coefficient
Register
52 bytes (416 bits) uncommitted for customer pro-
gramming of manufacturing data (e.g., serial num-
ber and date)
Offset Correction
Initial offset correction is accomplished at the input
stage of the signal gain amplifiers by a coarse offset
setting. Final offset correction occurs through the use of
a temperature indexed lookup table with 176 16-bit
entries. The on-chip temperature sensor provides a
unique 16-bit offset trim value from the table with an
indexing resolution of approximately 1.5°C from -40°C
to +125°C. Every millisecond, the on-chip temperature
sensor provides indexing into the offset lookup table in
EEPROM and the resulting value transferred to the off-
set DAC register. The resulting voltage is fed into a
summing junction at the PGA output, compensating the
sensor offset with a resolution of ±76V (±0.0019%
FSO). If the offset TC DAC is set to zero then the maxi-
mum temperature error is equivalent to one degree of
temperature drift of the sensor, given the Offset DAC
has corrected the sensor at every 1.5°C. The tempera-
ture indexing boundaries are outside of the specified
Absolute Maximum Ratings. The minimum indexing
value is 00hex corresponding to approximately -69°C.
All temperatures below this value output the coefficient
value at index 00hex. The maximum indexing value is
AFhex, which is the highest lookup table entry. All tem-
peratures higher than approximately 184°C output the
highest lookup table index value. No indexing wrap-
around errors are produced.
FSO Correction
Two functional blocks control the FSO gain calibration.
First, a coarse gain is set by digitally selecting the gain
of the PGA. Second, FSO DAC sets the sensor bridge
current or voltage with the digital input obtained from a
temperature-indexed reference to the FSO lookup table
in EEPROM. FSO correction occurs through the use of
a temperature indexed lookup table with 176 16-bit
entries. The on-chip temperature sensor provides a
unique FSO trim from the table with an indexing resolu-
tion approaching one 16-bit value at every 1.5°C from
-40°C to +125°C. The temperature indexing boundaries
are outside of the specified
Absolute Maximum
Ratings. The minimum indexing value is 00hex corre-
sponding to approximately -69°C. All temperatures
below this value output the coefficient value at index
00hex. The maximum indexing value is AFhex, which is
the highest lookup table entry. All temperatures higher
than approximately 184°C output the highest lookup
table index value. No indexing wrap-around errors are
produced.
MAX1452
BIAS
GENERATOR
OSCILLATOR
16
BIT
DAC
-
OFFSET
TC
16
BIT
DAC
-
OFFSET
(176)
16
BIT
DAC
-
FSO
(176)
POINT
16
BIT
DAC
-
FSO
TC
ANAMUX
FSOTC
176
TEMPERATURE
LOOK UP
POINTS FOR
OFFSET AND
SPAN.
OP-AMP
A = 1
AMPOUT
VSS
OUT
VDD
CLK1M
TEST
INTERNAL
EEPROM
6144 BITS
416 BITS
FOR USER
BDR
PGA
VDDF
VDD
BDR
DIO
UNLOCK
AMP+
AMP-
INP
ISRC
INM
8-BIT ADC
TEMP
SENSOR
IRO
DAC
CURRENT
SOURCE
VDD
∑
Figure 1. Functional Diagram
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1452CDW | 功能描述:数据转换系统 RoHS:否 制造商:Texas Instruments 转换速率:0.001 MSPs 分辨率:24 bit 最大工作温度:+ 125 C 最小工作温度:- 40 C 安装风格:SMD/SMT 封装 / 箱体:TQFP-64 封装:Reel |
| MAX1452EAE | 功能描述:板上安装温度传感器 Precision Sensor Signal Conditioner RoHS:否 制造商:Omron Electronics 输出类型:Digital 配置: 准确性:+/- 1.5 C, +/- 3 C 温度阈值: 数字输出 - 总线接口:2-Wire, I2C, SMBus 电源电压-最大:5.5 V 电源电压-最小:4.5 V 最大工作温度:+ 50 C 最小工作温度:0 C 关闭: 安装风格: 封装 / 箱体: 设备功能:Temperature and Humidity Sensor |
| MAX1452EAE+ | 功能描述:板上安装温度传感器 Precision Sensor Signal Conditioner RoHS:否 制造商:Omron Electronics 输出类型:Digital 配置: 准确性:+/- 1.5 C, +/- 3 C 温度阈值: 数字输出 - 总线接口:2-Wire, I2C, SMBus 电源电压-最大:5.5 V 电源电压-最小:4.5 V 最大工作温度:+ 50 C 最小工作温度:0 C 关闭: 安装风格: 封装 / 箱体: 设备功能:Temperature and Humidity Sensor |
| MAX1452EAE+C8H | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
| MAX1452EAE+T | 功能描述:板上安装温度传感器 Precision Sensor Signal Conditioner RoHS:否 制造商:Omron Electronics 输出类型:Digital 配置: 准确性:+/- 1.5 C, +/- 3 C 温度阈值: 数字输出 - 总线接口:2-Wire, I2C, SMBus 电源电压-最大:5.5 V 电源电压-最小:4.5 V 最大工作温度:+ 50 C 最小工作温度:0 C 关闭: 安装风格: 封装 / 箱体: 设备功能:Temperature and Humidity Sensor |
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