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参数资料
| 型号： | MAX115EAX |
| 厂商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分类： | ADC |
| 英文描述： | 2x4-Channel, Simultaneous-Sampling 12-Bit ADCs |
| 中文描述： | 4-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, PARALLEL ACCESS, PDSO36 |
| 封装： | 0.300 INCH, 0.80 MM PITCH, SSOP-36 |
| 文件页数： | 13/14页 |
| 文件大小： | 215K |
| 代理商： | MAX115EAX |
M
2x4-Channel, Simultaneous-Sampling
12-Bit ADCs
______________________________________________________________________________________
13
part of the current (torque) feedback loop. The
MAX115/MAX116 digitize the currents and deliver raw
data to the following DSP and controller stages, where
the vector processing takes place. Sensorless vector
control uses a computer model for the motor and an
algorithm to split each output current into its magnetiz-
ing (stator current) and torque-producing (rotor current)
components.
If a two-to-three phase conversion is not practical,
three currents can be sampled simultaneously with the
addition of a third sensor (not shown). Optional voltage
(position) feedback can be derived by measuring two
phase voltages (CH3A, CH4A). Typically, an isolated
differential amplifier is used between the motor and the
MAX115/MAX116. Again, the third phase voltage can
be derived from the magnitude (phase voltage) and its
relative phase.
For optimum speed control and good load regulation
close to zero speed, additional velocity and position
feedback are derived from an encoder or resolver and
brought to the MAX115/MAX116 at CH4B. The addi-
tional channels can be used to evaluate slower analog
inputs, such as the main DC bus voltage (CH2B), tem-
perature sensors (CH3B), or other analog inputs (AUX,
CH1B).
Power-Supply Bypassing
and Ground Management
For optimum system performance, use printed circuit
boards with separate analog and digital ground planes.
Wire-wrapped boards are not recommended. Connect
the two ground planes together at the low-impedance
power-supply source. For the best ground connection,
connect the DGND and AGND pins together and con-
nect that point to the system analog ground plane to
avoid interference from other digital noise sources. If
DGND is connected to the system digital ground, digi-
tal noise may get through to the ADC’s analog portion.
The AGND pins must be connected directly to a low-
impedance ground plane. Extra impedance between
the pins and the ground plane increases crosstalk and
degrades INL.
MAIN DC
12 BIT ADC +
MICRO-
SEQUENCER
CH1
CH2
CH3
CH4
A
B
A
B
TEMP
A
B
A
B
AUX
MAIN DC
C
F
V
F
VELOCITY
FEEDBACK
AC
AC
MOTOR
S
MAX115
MAX116
R/E
RESOLVER/
ENCODER
μ
C
DSP
12
B
POWER
STAGE
CONTROLLER
EXTERNAL
SETPOINTS
Figure 10. Vector Motor Control
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| MAX116EAX | 2x4-Channel, Simultaneous-Sampling 12-Bit ADCs |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX115EAX+ | 制造商:Maxim Integrated Products 功能描述: |
| MAX115EAX+T | 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 |
| MAX115EAX-T | 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 |
| MAX115EVB16 | 功能描述:数据转换 IC 开发工具 12-Bit 8Ch 116ksps 2.6V Precision ADC 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 |
| MAX115EVKIT | 功能描述:数据转换 IC 开发工具 MAX115 Eval Kit 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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