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参数资料
| 型号： | MAX1455AUE+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 22/25页 |
| 文件大小： | 0K |
| 描述： | IC AUTO SNSR SIGNAL COND 16TSSOP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 96 |
| 类型： | 自动 |
| 输入类型： | 模拟 |
| 输出类型： | 模拟 |
| 电流 - 电源： | 6mA |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-TSSOP（0.173"，4.40mm 宽） |
| 供应商设备封装： | 16-TSSOP |
| 包装： | 管件 |
MAX1455
The MAX1455 allows complete calibration and sensor
verification to be performed at a single test station. Once
calibration coefficients have been stored in the ASIC, the
customer can choose to retest in order to verify perfor-
mance as part of a regular QA audit or to generate final
test data on individual sensors. In addition, Maxim has
developed a pilot production test system to reduce time
to market. Engineering test evaluation and pilot produc-
tion of the MAX1455 can be performed without expending
the cost and time to develop in-house test capabilities.
Contact Maxim for additional information.
Frequency response can be user adjusted to values
lower than the 3.2kHz bandwidth by using the uncom-
mitted op amp and simple passive components.
The MAX1455 (Figure 1) provides an analog amplifica-
tion path for the sensor signal. It uses a digitally con-
trolled analog path for nonlinear temperature correction.
For PRT applications, analog architecture is available for
first-order temperature correction. Calibration and cor-
rection are achieved by varying the offset and gain of a
PGA and by varying the 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 MAX1455 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 calibration coefficient table
FSO temperature correction 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 one hundred
seventy-six 16-bit entries. The on-chip temperature sen-
sor 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 is
transferred to the offset DAC register. The resulting volt-
age 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 maximum temperature error is equivalent
to 1°C of temperature drift of the sensor, given that the
Offset DAC has corrected the sensor every 1.5°C. The
temperature indexing boundaries are outside the speci-
fied 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, FSODAC sets the sensor bridge cur-
rent or voltage with the digital input obtained from a tem-
perature indexed reference to the FSO lookup table in
EEPROM. FSO correction occurs through the use of a
Low-Cost Automotive Sensor Signal
Conditioner
6
_______________________________________________________________________________________
Figure 1. Functional Diagram
MAX1455
BIAS
GENERATOR
OSCILLATOR
ANAMUX
AMP-
AMPOUT
OUT
TEST 1
BDR
PGA
INP
INM
8-BIT A/D
TEMP
SENSOR
IRO
DAC
CURRENT
SOURCE
∑
CLIP-TOP
CLIP-BOT
TEST 2
TEST 3
TEST 4
AMP+
CONTROL
VDD1
VDD2
DIO
UNLOCK
VSS
176-POINT
TEMPERATURE-
INDEXED
FSO
COEFFICIENTS
176-POINT
TEMPERATURE-
INDEXED
OFFSET
COEFFICIENTS
416 BITS FOR
USER DATA
CONFIG REG
6144-BIT
EEPROM
16-BIT
DAC
-
FSO
16-BIT
DAC
-
OFFSET
16-BIT
DAC
-
OFFSET
TC
16-BIT
DAC
-
FSO
TC
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1455AUE+ | 功能描述:板上安装温度传感器 Automotive 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 |
| MAX1455AUE+T | 功能描述:板上安装温度传感器 Automotive 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 |
| MAX1455AUE-T | 功能描述:板上安装温度传感器 Automotive 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 |
| MAX1455C/D | 功能描述:板上安装温度传感器 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 |
| MAX1455C/D DIE | 制造商:Maxim Integrated Products 功能描述: |
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