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參數(shù)資料
| 型號： | MAX1999EVKIT |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | Evaluation Kit for the MAX1777/MAX1977/MAX1999 |
| 中文描述： | 評估板MAX1777/MAX1977/MAX1999 |
| 文件頁數(shù)： | 3/7頁 |
| 文件大?。?/td> | 540K |
| 代理商： | MAX1999EVKIT |
Detailed Description
The MAX1932 EV kit contains a step-up switching regu-
lator that includes an 8-bit DAC with an SPI-compatible
serial interface. The output of the EV kit has two set-
tings: the range voltage setting and a specific voltage
setting within the range.
As configured, the step-up switching regulator can
generate an output range of 40V to 90V and provide up
to 2mA of current to the output with 4.75V input. The
step-up switching-regulator output voltage can be
reconfigured to ranges of 4.5V to 15V, 4.5V to 45V, and
20V to 60V with proper resistor selection (see the
Output Voltage Range
section).
The voltage setting within the range is set by the 8-bit
DAC that receives input data from the SPI-compatible
interface. The EV kit connects to a compatible PC par-
allel port and uses the port to control the EV kit. The EV
kit’s SPI signals are connected to a MAX1841 level
translator (U2). The translator level shifts the comput-
er’s parallel port logic 5V signals to the EV kit’s logic
VCC voltage level chosen by the user. The translator
can function with voltages down to 2.7V. The level
translator’s parallel port side is powered by the parallel
port’s data pins 6, 7, 8, and 9, diodes D2/D3, and capac-
itor C6, which provides approximately 5V to the transla-
tor’s input. The power supply connected to V
CC
provides power to the level translator’s output. A 5-pin
header (J2) is provided for monitoring the 5V CLK_P,
CS_P, DIN_P nonlevel-translated and loopback signals
coming from the parallel port cable.
The EV kit can be reconfigured for stand-alone opera-
tion and connected to an external microcontroller for
evaluation. PC board pads are provided for interfacing
or monitoring the
CS
, SCLK, and DIN level-translated
pins of the MAX1932 IC.
Output Voltage Range
Step-Up Switching Regulator
Output Range
The MAX1932 EV kit’s step-up switching regulator output
range is set from 40V to 90V by feedback resistors R5,
R6, and R8. To generate output voltage ranges other
than 40V to 90V (4.5V to 15V, 4.5V to 45V, or 20V to
60V), select different external voltage-divider resistors
(R5, R6, and R8). Refer to the
Output and DAC
Adjustment Range
section in the MAX1932 data sheet
for instruction on selecting resistors.
Jumper Selection
Stand-Alone Configuration
The MAX1932 EV kit features four jumpers (JU1–JU4)
to reconfigure the EV kit for stand-alone operation
mode or PC/software control mode. Tables 1 and 2 list
the options for the desired evaluation mode.
Note:
All
jumpers must be configured for only one mode at a
time. A suitable voltage must be selected for stand-
alone mode. Configure all jumpers for either stand-
alone or PC/software control mode.
Detailed Description
of Software
The MAX1932 EV kit software’s main window has a but-
ton to start the SPI 3-wire parallel port diagnostic utility
used for bit-banging data into the MAX1932. Click on
SPI 3-Wire Parallel Port Diagnostic to start the utility.
SPI/3-Wire Diagnostic
The SPI/3-wire diagnostic screen allows you to send
SPI or 3-wire commands, or manipulate the parallel port
pins directly. Each of the 25 pins is represented by a
checkbox. A checkmark means that the corresponding
pin is at a logic-high level. Unused and grounded pins
are gray.
E
MAX1932 Evaluation Kit
_______________________________________________________________________________________________________
3
Figure 2. Parallel Port Diagnostic Window’s Bit-Banging Serial
Interface Tab
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| MAX199ACAI | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結構:Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| MAX199ACAI+ | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 12Bit 8Ch 100ksps 4.18V Precision ADC RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結構:Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| MAX199ACAI+T | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC 12Bit 8Ch 100ksps 4.18V Precision ADC RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結構:Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| MAX199ACAI-T | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結構:Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
| MAX199ACNI | 功能描述:模數(shù)轉(zhuǎn)換器 - ADC RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 結構:Sigma-Delta 轉(zhuǎn)換速率:125 SPs to 8 KSPs 分辨率:24 bit 輸入類型:Differential 信噪比:107 dB 接口類型:SPI 工作電源電壓:1.7 V to 3.6 V, 2.7 V to 5.25 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:VQFN-32 |
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