参数资料
型号: MAX197AEWI+T
厂商: Maxim Integrated Products
文件页数: 3/16页
文件大小: 0K
描述: IC DAS 12BIT SNGL 28-SOIC
产品培训模块: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
标准包装: 1,000
类型: 数据采集系统(DAS)
分辨率(位): 12 b
采样率(每秒): 100k
数据接口: 并联
电压电源: 单电源
电源电压: 4.75 V ~ 5.25 V
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 28-SOIC(0.295",7.50mm 宽)
供应商设备封装: 28-SOIC W
包装: 带卷 (TR)
How to Read a Conversion
A standard interrupt signal, INT, is provided to allow the
device to flag the P when the conversion has ended
and a valid result is available. INT goes low when con-
version is complete and the output data is ready
(Figures 5 and 6). It returns high on the first read cycle
or if a new control byte is written.
Clock Modes
The MAX197 operates with either an internal or an
external clock. Control bits (D6, D7) select either inter-
nal or external clock mode. Once the desired clock
mode is selected, changing these bits to program
power-down will not affect the clock mode. In each
mode, internal or external acquisition can be used. At
power-up, external clock mode is selected.
Internal Clock Mode
Select internal clock mode to free the P from the
burden of running the SAR conversion clock. To select
this mode, write the control byte with D7 = 0 and D6 = 1.
A 100pF capacitor between the CLK pin and ground
sets this frequency to 1.56MHz nominal. Figure 7
shows a linear relationship between the internal clock
period and the value of the external capacitor used.
MAX197
Multi-Range (±10V, ±5V, +10V, +5V),
Single +5V, 12-Bit DAS with 8+4 Bus Interface
______________________________________________________________________________________
11
tCS
tCSWS
tWR
tACQI
tCONV
tDH
tDS
tINT1
tD0
tD01
tTR
tCSHW
tCSRS
tCSRH
ACQMOD = "1"
CS
WR
D7–D0
INT
RD
HBEN
DOUT
ACQMOD = "0"
HIGH / LOW
BYTE VALID
HIGH / LOW
BYTE VALID
CONTROL
BYTE
CONTROL
BYTE
Figure 6. Conversion Timing Using External Acquisition Mode
2000
0
50
250
350
500
CLOCK PIN CAPACITANCE (pF)
INTERNAL
CLOCK
PERIOD
(ns)
100
150 200
300
1500
1000
Figure 7. Internal Clock Period vs. Clock Pin Capacitance
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相关代理商/技术参数
参数描述
MAX197AMWI/PR 制造商:Maxim Integrated Products 功能描述:- Rail/Tube
MAX197AMYI 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
MAX197BC/D 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
MAX197BCAI 功能描述:模数转换器 - ADC Integrated Circuits (ICs) 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
MAX197BCAI+ 功能描述:模数转换器 - ADC 12-Bit 8Ch 100ksps 4.18V 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