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| 型号： | THS1050IPHP |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | ADC |
| 英文描述： | 1-CH 10-BIT DELTA-SIGMA ADC, PARALLEL ACCESS, PQFP48 |
| 封装： | POWER, PLASTIC, TQFP-48 |
| 文件页数： | 9/21页 |
| 文件大小： | 424K |
| 代理商： | THS1050IPHP |
THS1050
10-BIT 50 MSPS IF SAMPLING COMMUNICATIONS
ANALOG-TO-DIGITAL CONVERTER
SLAS278A – APRIL 2000 – REVISED MARCH 2001
17
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
digital outputs
The digital outputs are in 2s complement format and can drive either TTL, 3-V CMOS, or 5-V CMOS logic. The
digital output high voltage level is equal to DRVDD. Table 1 shows the value of the digital output bits for full scale
analog input voltage, midrange analog input voltage, and negative full scale input voltage. To reduce capacitive
loading, each digital output of the THS1050 should drive only one digital input. The CMOS output drivers are
capable of handling up to a 15-pF load. For better SNR performance, use 3.3 V for DRVDD. Resistors of 200
in series with the digital output can be used for optimizing SNR performance.
Table 1. Digital Outputs
ANALOG INPUT (VIN+) OR – (VIN–)
D9
D8
D7
D6
D5
D4
D
D2
D1
D0
Vref+
0
1
VCM
0
Vref–
1
0
power supplies
Best performance is obtained when AVDD is kept separate from DVDD. Regulated or linear supplies, as opposed
to switched power supplies, must be used to minimize supply noise. It is also recommended to partition the
analog and digital components on the board in such a way that the analog supply plane does not overlap with
the digital supply plane in order to limit dielectric coupling between the different supplies.
package
The THS1050 is packaged in a small 48-pin quad flat-pack PowerPAD
package. The die of the THS1050 is
bonded directly to copper alloy plate which is exposed on the bottom of the package. Although, the PowerPAD
provides superior heat dissipation when soldered to ground land, it is not necessary to solder the bottom of the
PowerPAD to anything in order to achieve minimum performance levels indicated in this specification over the
full recommended operating temperature range.
If the device is to be used at ambient temperatures above the recommended operating temperatures, use of
the PowerPAD is suggested.
The copper alloy plate or PowerPAD is exposed on the bottom of the device package for a direct solder
attachment to a PCB land or conductive pad. The land dimensions should have minimum dimensions equal to
the package dimensions minus 2 mm, see Figure 24.
For a multilayer circuit board, a second land having dimensions equal to or greater than the land to which the
device is soldered should be placed on the back of the circuit board (see Figure 25). A total of 9 thermal vias
or plated through-holes should be used to connect the two lands to a ground plane (buried or otherwise) having
a minimum total area of 3 inches square in 1 oz. copper. For the THS1050 package, the thermal via centers
should be spaced at a minimum of 1 mm. The ground plane need not be directly under or centered around the
device footprint if a wide ground plane thermal run having a width on the order of the device is used to channel
the heat from the vias to the larger portion of the ground plane. The THS1050 package has a standoff of 0.19
mm or 7.5 mils. In order to apply the proper amount of solder paste to the land, a solder paste stencil with a 6
mils thickness is recommended for this device. Too thin a stencil may lead to an inadequate connection to the
land. Too thick a stencil may lead to beading of solder in the vicinity of the pins which may lead to shorts. For
more information, refer to Texas Instruments literature number SLMA002 PowerPAD
Thermally Enhanced
Package.
PowerPAD is a trademark of Texas Instruments.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| THS1050PHP | 制造商:TI 制造商全称:Texas Instruments 功能描述:10-BIT 50 MSPS IF SAMPLING COMMUNICATIONS ANALOG-TO-DIGITAL CONVERTER |
| THS1050RJ | 功能描述:线绕电阻器 - 底架安装 50 Ohms 10W 50PPM RoHS:否 制造商:Vishay/Dale 电阻:7 Ohms 容差:1 % 功率额定值:100 W 温度系数:50 PPM / C 系列:RH 工作温度范围:- 55 C to + 250 C 尺寸:46.02 mm Dia. x 46.02 mm W x 88.9 mm L x 44.45 mm H 封装:Bulk 产品:Power Resistors Wirewound Aluminum Housed |
| THS10-516R-D | 制造商:Thomas & Betts 功能描述:CATAMOUNT CABLE TIES |
| THS10560RJ | 功能描述:线绕电阻器 - 底架安装 THS10 560R 5% RoHS:否 制造商:Vishay/Dale 电阻:7 Ohms 容差:1 % 功率额定值:100 W 温度系数:50 PPM / C 系列:RH 工作温度范围:- 55 C to + 250 C 尺寸:46.02 mm Dia. x 46.02 mm W x 88.9 mm L x 44.45 mm H 封装:Bulk 产品:Power Resistors Wirewound Aluminum Housed |
| THS1056RJ | 功能描述:线绕电阻器 - 底架安装 THS10 56R 5% RoHS:否 制造商:Vishay/Dale 电阻:7 Ohms 容差:1 % 功率额定值:100 W 温度系数:50 PPM / C 系列:RH 工作温度范围:- 55 C to + 250 C 尺寸:46.02 mm Dia. x 46.02 mm W x 88.9 mm L x 44.45 mm H 封装:Bulk 产品:Power Resistors Wirewound Aluminum Housed |
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