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参数资料
| 型号： | THS7303PW |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 音频／视频放大 |
| 英文描述： | 3 CHANNEL, VIDEO AMPLIFIER, PDSO20 |
| 封装： | GREEN, PLASTIC, TSSOP-20 |
| 文件页数： | 42/60页 |
| 文件大小： | 1980K |
| 代理商： | THS7303PW |
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SLOS479B
– OCTOBER 2005 – REVISED MARCH 2011
EVALUATION MODULE
To evaluate the THS7303, an evaluation module (EVM) is available. Because the THS7303 is controlled by the
I2C lines, additional control is required rather than simple switches. To keep the control as easy as possible, a
USB-to-I2C interface was designed onto the EVM. A computer running either Windows 2000 or XP is then
connected to the EVM through the USB cable. A computer program interface was created for graphical control of
the THS7303 that allows both read and write functions to be performed. The EVM comes with a CD-ROM loaded
with all the required software to install the command software onto the computer.
To program the THS7303, select the channel, the filter, and the mode of operation and then click the Execute
button. The Req Done light on the computer screen is lit to confirm the command was executed by the THS7303.
The same procedure is done for each channel. To read the THS7303 registers, change the switch to Read,
select the channel, and then click the Execute button. The resulting register content appears in hexadecimal
code.
Note that the USB-to-I2C interface circuitry must be powered by a 3.3-V supply only. Additionally, the I2C circuitry
section must be powered on either at the same time as the THS7303 or before power is applied to the THS7303.
This is because the TAS1020 device must complete reading the EEPROM to program its core. The yellow LED
in the I2C section is lit if the TAS1020 was programmed properly. If this LED is not lit, then the power should be
cycled to reset the USB-to-I2C TAS1020 chip.
The communication between the computer and the THS7303 EVM over USB is not plug-and-play. Instead, the
system must be powered up in sequence for proper communication. Follow this procedure to start the program:
1. Make sure the computer program (THS73x3EVM Control program) is not turned on, and make sure there is
no power applied to the EVM (both 3.3 V and the VA (THS7303) power). Check that the USB cable is
plugged into both the computer and the EVM.
2. Apply both 3.3-V and the VA power to the THS73x3 EVM. The USB ACTIVE LED (D2) must be lit yellow. If
D2 s not lit, then there is a EEPROM communication problem between U2 and U3. This must be corrected
before going any further.
NOTE
It is very important to apply power to the THS7303 EVM and have the yellow LED lit
before starting the program on the computer. Failure to follow this step will result in the
computer program not recognizing the EVM and there will be no communication between
the computer and the EVM. If power is removed for any reason, shutdown the computer
program, apply power to the THS7303 EVM with the yellow LED lit, and then restart the
computer program as indicated here.
3. Configure the I2C address jumpers (JP1 and JP2) for the desired I2C addressing. With the jumpers removed,
the two LSBs are 00.
4. With D2 lit, now start the computer program (THS73x3 EVM Control). Configure the program as desired,
making sure that the address of the THS73x3 matches the jumper settings JP1 and JP2. By default, 00
matches the EVM with the jumpers removed.
5. Once configured, pressing the Execute button writes the code to the THS73x3 EVM and sends the proper
I2C codes to the THS73x3. The computer program should show a green light; this light indicates proper
communication to the THS73x3 is occurring.
Copyright
2005–2011, Texas Instruments Incorporated
47
Product Folder Link(s): THS7303
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| THS7303PWG4 | 3 CHANNEL, VIDEO AMPLIFIER, PDSO20 |
| THS7303PWRG4 | 3 CHANNEL, VIDEO AMPLIFIER, PDSO20 |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| THS7303PWG4 | 功能描述:视频放大器 3-Ch Low Power Video RoHS:否 制造商:ON Semiconductor 通道数量:4 电源类型: 工作电源电压:3.3 V, 5 V 电源电流: 最小工作温度: 最大工作温度: 封装 / 箱体:TSSOP-14 封装:Reel |
| THS7303PWR | 功能描述:视频放大器 3-Ch Low Power Video RoHS:否 制造商:ON Semiconductor 通道数量:4 电源类型: 工作电源电压:3.3 V, 5 V 电源电流: 最小工作温度: 最大工作温度: 封装 / 箱体:TSSOP-14 封装:Reel |
| THS7303PWRG4 | 功能描述:视频放大器 3-Ch Low Power Video RoHS:否 制造商:ON Semiconductor 通道数量:4 电源类型: 工作电源电压:3.3 V, 5 V 电源电流: 最小工作温度: 最大工作温度: 封装 / 箱体:TSSOP-14 封装:Reel |
| THS730A A2 | 制造商:Tektronix Inc 功能描述:OSCILLOSCOPE DSO/DMM 200MHZ |
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