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| 型号： | MAX1452AAE+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 22/25页 |
| 文件大小： | 0K |
| 描述： | IC SENSOR SIGNAL COND 16-SSOP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,000 |
| 类型： | 信号调节器 |
| 输入类型： | 模拟 |
| 输出类型： | 模拟 |
| 接口： | 串行 |
| 电流 - 电源： | 2.5mA |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-SSOP（0.209"，5.30mm 宽） |
| 供应商设备封装： | 16-SSOP |
| 包装： | 带卷 (TR) |
MAX1452
Low-Cost Precision Sensor
Signal Conditioner
6
Maxim Integrated
Detailed Description
The MAX1452 provides amplification, calibration, and
temperature compensation to enable an overall perfor-
mance approaching the inherent repeatability of the
sensor. The fully analog signal-path introduces no
quantization noise in the output signal while enabling
digitally controlled trimming with the integrated 16-bit
DACs. Offset and span can be calibrated to within
±0.02% of span.
The MAX1452 architecture includes a programmable
sensor excitation, a 16-step programmable-gain ampli-
fier (PGA), a 768-byte (6144 bits) internal EEPROM, four
16-bit DACs, an uncommitted op amp, and an on-chip
temperature sensor.The MAX1452 also provides a
unique temperature compensation strategy for offset
TC and FSOTC that was developed to provide a
remarkable degree of flexibility while minimizing testing
costs.
The customer can select from one to 114 temperature
points to compensate their sensor. This allows the lati-
tude to compensate a sensor with a simple first order
linear correction or match an unusual temperature
curve. Programming up to 114 independent 16-bit EEP-
ROM locations corrects performance in 1.5°C tempera-
ture increments over a range of -40°C to +125°C. For
sensors that exhibit a characteristic temperature perfor-
mance, a select number of calibration points can be
used with a number of preset values that define the
temperature curve. In cases where the sensor is at a
different temperature than the MAX1452, the MAX1452
uses the sensor bridge itself to provide additional tem-
perature correction.
The single pin, serial Digital Input-Output (DIO) commu-
nication architecture and the ability to timeshare its
activity with the sensor’s output signal enables output
sensing and calibration programming on a single line
by parallel connecting OUT and DIO. The MAX1452
provides a Secure-Lock feature that allows the cus-
tomer to prevent modification of sensor coefficients and
the 52-byte user definable EEPROM data after the sen-
sor has been calibrated. The Secure-Lock feature also
provides a hardware override to enable factory rework
and recalibration by assertion of logic high on the
UNLOCK pin.
The MAX1452 allows complete calibration and sensor
verification to be performed at a single test station.
Once calibration coefficients have been stored in the
MAX1452, the customer can choose to retest in order to
verify performance as part of a regular QA audit or to
generate final test data on individual sensors.
The MAX1452’s low current consumption and the inte-
grated uncommitted op amp enables a 4–20mA output
signal format in a sensor that is completely powered
from a 2-wire current loop. Frequency response can be
user-adjusted to values lower than the 3.2kHz band-
width by using the uncommitted op amp and simple
passive components.
The MAX1452 (Figure 1) provides an analog amplifica-
tion path for the sensor signal. It also uses an analog
architecture for first-order temperature correction. A
digitally controlled analog path is then used for nonlin-
ear temperature correction. Calibration and correction
is achieved by varying the offset and gain of a pro-
grammable-gain-amplifier (PGA) and by varying the
Pin Description (continued)
PIN
SSOP/TSSOP
TQFN-EP
NAME
FUNCTION
911
VDDF
Positive Supply Voltage for EEPROM. Connect a 1F capacitor from
VDDF to VSS. Connect VDDF to VDD or for improved noise performance
connect a 30
Ω resistor to VDD.
10
12
UNLOCK
Secure-Lock Disable. Allows communication to the device.
11
14
DIO
Digital Input Output. DIO allows communication with the device.
12
15
CLK1M
1MHz Clock Output. The output can be controlled by a configuration bit.
13
17
AMPOUT
Uncommitted Amplifier Output
14
18
AMP-
Uncommitted Amplifier Negative Input
15
19
AMP+
Uncommitted Amplifier Positive Input
16
21
FSOTC
Full Span TC Buffered Output
—
EP
Exposed Pad (TQFN Only). Internally connected; connect to VSS.
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相关代理商/技术参数 |
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|---|---|
| MAX1452ATG | 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 |
| MAX1452ATG+ | 功能描述:数据转换系统 LO-COST PREC SNSR SIGNAL CDTNR 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 |
| MAX1452ATG+C8J | 功能描述:数据转换系统 Low-Cost Precision Sensor Signal Conditioner 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 |
| MAX1452ATG+T | 功能描述:数据转换系统 LO-COST PREC SNSR SIGNAL CDTNR 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 |
| MAX1452ATG+TC8J | 功能描述:数据转换系统 Low-Cost Precision Sensor Signal Conditioner 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 |
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