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参数资料
| 型号： | MAX1254BEUE |
| 厂商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分类： | 电源管理 |
| 英文描述： | Stand-Alone, 10-Channel, 12-Bit System Monitors with Internal Temperature Sensor and VDD Monitor |
| 中文描述： | 9-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO16 |
| 封装： | TSSOP-16 |
| 文件页数： | 11/29页 |
| 文件大小： | 439K |
| 代理商： | MAX1254BEUE |
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M
Stand-Alone, 10-Channel, 12-Bit System Monitors
with Internal Temperature Sensor and V
DD
Monitor
______________________________________________________________________________________
11
During the acquisition interval, IN+ and IN- charge both
a positive (CHOLDP) and a negative (CHOLDN) sam-
pling capacitor. After completing the acquisition inter-
val, the T/H switches open, storing an accurate sample
of the differential voltage between IN+ and IN-. This
charge is then transferred to the ADC and converted.
Finally, the conversion result is transferred to the cur-
rent data register.
Temperature conversions require 46μs (typ) and mea-
sure the difference between two sequential voltage
measurements (see the
Temperature Measurement
section for a detailed description).
Fully Differential Track/Hold (T/H)
The T/H acquisition interval begins with the rising edge
of
CS
(for manually triggered conversions) and is inter-
nally timed to 1.5μs (typ). The accuracy of the input sig-
nal sample is a function of the input signal
’
s source
impedance and the T/H
’
s capacitance. In order to
achieve adequate settling of the T/H, limit the signal
source impedance to a maximum of 1k
.
Input Bandwidth
The ADC
’
s input tracking circuitry has a 1MHz small-
signal bandwidth. To avoid high-frequency signals
aliasing into the frequency band of interest, anti-alias
prefiltering of the input signals is recommended.
Analog Input Protection
Internal protection diodes, which clamp the analog
inputs to V
DD
and GND, allow the channel input pins to
swing from (GND - 0.3V) to (V
DD
+ 0.3V) without dam-
age. However, for accurate conversions near full scale,
the inputs must not exceed V
DD
by more than 50mV or
be lower than GND by 50mV. If the analog input range
must exceed 50mV beyond the supplies, limit the input
current.
Single Ended/Differential
The MAX1253/MAX1254 use a fully differential ADC for
all conversions. Through the input configuration regis-
ter, the analog inputs can be configured for either dif-
ferential or single-ended conversions. When sampling
signal sources close to the MAX1253/MAX1254, single-
ended conversion is generally sufficient. Single-ended
conversions use only one analog input per signal
source, internally referenced to GND.
MUX
AIN0
V
DD
AIN1
AIN2
AIN3
AIN4
AIN5
AIN6
AIN7
TEMP
SENSE
12-BIT
ADC WITH T/H
DIGITAL
COMPARATOR
INPUT REGISTERS
CURRENT DATA
UPPER THRESHOLD
LOWER THRESHOLD
# FAULT CYCLES
AVERAGE
CONFIGURATION/
STATUS
REGISTERS
SCAN AND
CONVERSION
CONTROL
SERIAL
INTERFACE
DIN
DOUT
SCLK
CS
INT
Figure 3. Simplified Alarm Block Diagram of the MAX1253/MAX1254
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX1254BEUE+ | 功能描述:模数转换器 - ADC 12-Bit 10Ch 94ksps 5V Precision ADC RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
| MAX1254BEUE+T | 功能描述:模数转换器 - ADC 12-Bit 10Ch 94ksps 5V Precision ADC RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
| MAX1254BEUE-T | 功能描述:模数转换器 - ADC RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
| MAX1254EVC16 | 功能描述:模数转换器 - ADC Stand-Alone 10-Channel 12-Bit System Monitors with Internal Temperature Sensor and VDD Monitor RoHS:否 制造商:Texas Instruments 通道数量:2 结构:Sigma-Delta 转换速率:125 SPs to 8 KSPs 分辨率:24 bit 输入类型:Differential 信噪比:107 dB 接口类型:SPI 工作电源电压:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-32 |
| MAX1254EVKIT | 功能描述:数据转换 IC 开发工具 Evaluation Kit/Evaluation System for the MAX1254 MAX1253 RoHS:否 制造商:Texas Instruments 产品:Demonstration Kits 类型:ADC 工具用于评估:ADS130E08 接口类型:SPI 工作电源电压:- 6 V to + 6 V |
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