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MAX5498 Evaluation Kit
Command History
The Command History group box displays the
Table 2. J1 and J2 Shunt Configuration
sequence of bytes sent to the device for each of the
GUI’s button controls. For the write controls ( Write and
Write NV ), the group box displays the command byte fol-
lowed by the 2 data bytes (wiper setting). The 2 data
bytes correspond to the W-L tap value. For the save,
load, and copy controls the group box displays the asso-
ciated command byte. All values are displayed in hex.
SHUNT
POSITION
3-4*
Not
installed
PIN
L1, L2
L1, L2
DESCRIPTION
L terminals connected to GND (use
when measuring digital pot resistance)
L terminals unconnected
*Default position.
Evaluating Other Devices
The MAX5498 EV kit software can also be used to
evaluate any of the other devices in the MAX5494 –
MAX5499 family. The software is reconfigured for each
device by choosing the device number from the
Options | Device menu bar. To ensure proper opera-
tion, install the alternate device on the EV kit before
reconfiguring the software.
Keyboard Navigation
When you type on the keyboard, the system must know
which control should receive the keys. Press the Tab
key to move the keyboard’s focus from one control to
the next. The focused control is indicated by a dotted
outline. Shift + Tab moves the focus to the previously
focused control. Buttons respond to the keyboard’s
space bar. Some controls respond to the keyboard’s up
and down arrow keys. Activate the program’s menu bar
by pressing the F10 key, and then press the letter of the
menu item you want. Most menu items have one letter
underlined, indicating their shortcut key.
Detailed Description of Hardware
As configured, the MAX5498 EV kit evaluates the
MAX5498 dual, linear-taper potentiometer with one
programmable voltage-divider and one variable resis-
tor. The potentiometer terminals are accessible from
headers H1 and H2. The MAX5498 EV kit hardware and
software can also be used to evaluate the MAX5494–
MAX5497 or MAX5499. The installed device is con-
trolled using a graphical user interface (GUI) that can
be downloaded by visiting www.maxim-ic.com/evkitsoft-
Evaluating the
MAX5494–MAX5497 or MAX5499
To evaluate the MAX5494–MAX5497 or MAX5499, con-
tact the factory for a free sample of the MAX5494ETE+,
MAX5495ETE+, MAX5496ETE+, MAX5497ETE+, or
MAX5499ETE+. Refer to the MAX5494–MAX5499 IC
data sheet for additional device information.
External User-Supplied SPI Interface
The MAX5498 EV kit can be modified for use with an
external user-supplied SPI interface. First, with power
off and USB disconnected, turn the board over and cut
the four traces that are on the back of the board, under-
neath location J3. Install a standard dual-row header
and connect an external SPI interface. See Figure 2a
for the J3 schematic and Figure 4 for J3 trace locations
on the bottom side of the PCB.
Single-Supply Operation (VDD)
The MAX5498 EV kit’s default configuration is for single-
supply operation. The USB interface and microcontroller
are powered from the USB bus voltage (5V). The device
under test can be powered from an external power sup-
ply (2.7V to 5.25V) connected between VDD and GND
(see Table 3). When operating with a single supply, the
VSS input should be connected to GND (Table 4).
Table 3. JU1 Jumper Functions
SHUNT
SIGNAL EV KIT FUNCTION
POSITION
ware and clicking on the MAX5498 EVKIT software link.
1-2*
Power device from USB 5V supply.
Ground Referencing Test Equipment
The L terminals of each digital pot are linked to ground
by placing a shunt on pins 3-4 of headers J1 and J2
VDD
Open
2-3
Do not use—device will not be powered.
Power device from external power
supply (2.7V to 5.25V) connected
(see Table 2). This provides a ground reference when
using nonground referenced test equipment (e.g.,
handheld digital multimeter).
*Default position.
between VDD and GND pads.
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相关代理商/技术参数
MAX5499ETE
功能描述:数字电位计 IC RoHS:否 制造商:Maxim Integrated 电阻:200 Ohms 温度系数:35 PPM / C 容差:25 % POT 数量:Dual 每 POT 分接头:256 弧刷存储器:Volatile 缓冲刷: 数字接口:Serial (3-Wire, SPI) 描述/功能:Dual Volatile Low Voltage Linear Taper Digital Potentiometer 工作电源电压:1.7 V to 5.5 V 电源电流:27 uA 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:TQFN-16 封装:Reel
MAX5499ETE+
功能描述:数字电位计 IC 10-Bit Dual NV Linear-Taper RoHS:否 制造商:Maxim Integrated 电阻:200 Ohms 温度系数:35 PPM / C 容差:25 % POT 数量:Dual 每 POT 分接头:256 弧刷存储器:Volatile 缓冲刷: 数字接口:Serial (3-Wire, SPI) 描述/功能:Dual Volatile Low Voltage Linear Taper Digital Potentiometer 工作电源电压:1.7 V to 5.5 V 电源电流:27 uA 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:TQFN-16 封装:Reel
MAX5499ETE+T
功能描述:数字电位计 IC 10-Bit Dual NV Linear-Taper RoHS:否 制造商:Maxim Integrated 电阻:200 Ohms 温度系数:35 PPM / C 容差:25 % POT 数量:Dual 每 POT 分接头:256 弧刷存储器:Volatile 缓冲刷: 数字接口:Serial (3-Wire, SPI) 描述/功能:Dual Volatile Low Voltage Linear Taper Digital Potentiometer 工作电源电压:1.7 V to 5.5 V 电源电流:27 uA 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:TQFN-16 封装:Reel
MAX5499ETE-T
功能描述:数字电位计 IC RoHS:否 制造商:Maxim Integrated 电阻:200 Ohms 温度系数:35 PPM / C 容差:25 % POT 数量:Dual 每 POT 分接头:256 弧刷存储器:Volatile 缓冲刷: 数字接口:Serial (3-Wire, SPI) 描述/功能:Dual Volatile Low Voltage Linear Taper Digital Potentiometer 工作电源电压:1.7 V to 5.5 V 电源电流:27 uA 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:TQFN-16 封装:Reel
MAX549AC/D
功能描述:数模转换器- DAC RoHS:否 制造商:Texas Instruments 转换器数量:1 DAC 输出端数量:1 转换速率:2 MSPs 分辨率:16 bit 接口类型:QSPI, SPI, Serial (3-Wire, Microwire) 稳定时间:1 us 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-14 封装:Tube
MAX549ACPA
功能描述:数模转换器- DAC Integrated Circuits (ICs) RoHS:否 制造商:Texas Instruments 转换器数量:1 DAC 输出端数量:1 转换速率:2 MSPs 分辨率:16 bit 接口类型:QSPI, SPI, Serial (3-Wire, Microwire) 稳定时间:1 us 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-14 封装:Tube
MAX549ACPA+
功能描述:数模转换器- DAC 8-Bit 2Ch Precision DAC RoHS:否 制造商:Texas Instruments 转换器数量:1 DAC 输出端数量:1 转换速率:2 MSPs 分辨率:16 bit 接口类型:QSPI, SPI, Serial (3-Wire, Microwire) 稳定时间:1 us 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-14 封装:Tube
MAX549ACUA
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