- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄19029 > DC1525A-A (Linear Technology)BOARD DEMO 125MSPS LTC2175-14 PDF資料下載
參數(shù)資料
| 型號(hào)： | DC1525A-A |
| 廠商： | Linear Technology |
| 文件頁(yè)數(shù)： | 19/34頁(yè) |
| 文件大小： | 0K |
| 描述： | BOARD DEMO 125MSPS LTC2175-14 |
| 軟件下載： | QuikEval II System |
| 設(shè)計(jì)資源： | DC1525A Design Files |
| 標(biāo)準(zhǔn)包裝： | 1 |
| 系列： | * |
| 相關(guān)產(chǎn)品： | DC1371A-ND - BOARD USB DATA ACQUISITION HS |
第1頁(yè)第2頁(yè)第3頁(yè)第4頁(yè)第5頁(yè)第6頁(yè)第7頁(yè)第8頁(yè)第9頁(yè)第10頁(yè)第11頁(yè)第12頁(yè)第13頁(yè)第14頁(yè)第15頁(yè)第16頁(yè)第17頁(yè)第18頁(yè)當(dāng)前第19頁(yè)第20頁(yè)第21頁(yè)第22頁(yè)第23頁(yè)第24頁(yè)第25頁(yè)第26頁(yè)第27頁(yè)第28頁(yè)第29頁(yè)第30頁(yè)第31頁(yè)第32頁(yè)第33頁(yè)第34頁(yè)
LTC2175-14/
LTC2174-14/LTC2173-14
26
21754314fa
applicaTions inForMaTion
Table 4. Serial Programming Mode Register Map (PAR/SER = GND)
REGISTER A0: RESET REGISTER (ADDRESS 00h)
D7
D6
D5
D4
D3
D2
D1
D0
RESET
X
Bit 7
RESET
Software Reset Bit
0 = Not Used
1 = Software Reset. All Mode Control Registers are Reset to 00h. The ADC is Momentarily Placed in SLEEP Mode.
This Bit is Automatically Set Back to Zero at the End of the SPI Write Command.
The Reset Register is Write Only.
Bits 6-0
Unused, Don’t Care Bits.
REGISTER A1: FORMAT AND POWER-DOWN REGISTER (ADDRESS 01h)
D7
D6
D5
D4
D3
D2
D1
D0
DCSOFF
RAND
TWOSCOMP
SLEEP
NAP_4
NAP_3
NAP_2
NAP_1
Bit 7
DCSOFF
Clock Duty Cycle Stabilizer Bit
0 = Clock Duty Cycle Stabilizer On
1 = Clock Duty Cycle Stabilizer Off. This is Not Recommended.
Bit 6
RAND
Data Output Randomizer Mode Control Bit
0 = Data Output Randomizer Mode Off
1 = Data Output Randomizer Mode On
then SDO can be left floating and no pull-up resistor is
needed.Table4showsamapofthemodecontrolregisters.
Software Reset
If serial programming is used, the mode control registers
shouldbeprogrammedassoonaspossibleafterthepower
supplies turn on and are stable. The first serial command
must be a software reset which will reset all register data
bits to logic 0. To perform a software reset, bit D7 in the
reset register is written with a logic 1. After the reset SPI
write command is complete, bit D7 is automatically set
back to zero.
GROUNDING AND BYPASSING
The LTC2175-14/LTC2174-14/LTC2173-14 requires a
printed circuit board with a clean unbroken ground plane.
A multilayer board with an internal ground plane in the
first layer beneath the ADC is recommended. Layout for
the printed circuit board should ensure that digital and
analog signal lines are separated as much as possible. In
particular, care should be taken not to run any digital track
alongside an analog signal track or underneath the ADC.
High quality ceramic bypass capacitors should be used
at the VDD, OVDD, VCM, VREF, REFH and REFL pins. By-
pass capacitors must be located as close to the pins as
possible. Of particular importance is the 0.1F capacitor
between REFH and REFL. This capacitor should be on the
same side of the circuit board as the A/D, and as close to
the device as possible (1.5mm or less). Size 0402 ceramic
capacitors are recommended. The larger 2.2F capacitor
between REFH and REFL can be somewhat further away.
Thetracesconnectingthepinsandbypasscapacitorsmust
be kept short and should be made as wide as possible.
The analog inputs, encode signals, and digital outputs
should not be routed next to each other. Ground fill and
grounded vias should be used as barriers to isolate these
signals from each other.
HEAT TRANSFER
MostoftheheatgeneratedbytheLTC2175-14/LTC2174-14/
LTC2173-14istransferredfromthediethroughthebottom-
sideExposedPadandpackageleadsontotheprintedcircuit
board. For good electrical and thermal performance, the
Exposed Pad must be soldered to a large grounded pad
on the PC board. This pad should be connected to the
internal ground planes by an array of vias.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| 48ESB | LAMP INCAND T-2 TELE SLIDE 48V |
| CQM1-TC201 | 4 LOOP THERMOCPLE IN NPN OUT |
| 35A1 | LAMP INCAND T-2 TELE SLIDE 35V |
| 24B1 | LAMP INCAND T-2 TELE SLIDE 24V |
| 8098 | LAMP INCAND 3MM STD BI-PIN 14V |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DC1525A-B | 功能描述:BOARD DEMO 105MSPS LTC2174-14 RoHS:是 類別:未定義的類別 >> 其它 系列:* 標(biāo)準(zhǔn)包裝:1 系列:* 其它名稱:MS305720A |
| DC1525A-C | 功能描述:BOARD DEMO 80MSPS LTC2173-14 RoHS:是 類別:未定義的類別 >> 其它 系列:* 標(biāo)準(zhǔn)包裝:1 系列:* 其它名稱:MS305720A |
| DC1525A-D | 功能描述:BOARD DEMO 65MSPS LTC2172-14 RoHS:是 類別:未定義的類別 >> 其它 系列:* 標(biāo)準(zhǔn)包裝:1 系列:* 其它名稱:MS305720A |
| DC1525A-E | 功能描述:BOARD DEMO 40MSPS LTC2171-14 RoHS:是 類別:未定義的類別 >> 其它 系列:* 標(biāo)準(zhǔn)包裝:1 系列:* 其它名稱:MS305720A |
| DC1525A-F | 功能描述:BOARD DEMO 25MSPS LTC2170-14 RoHS:是 類別:未定義的類別 >> 其它 系列:* 標(biāo)準(zhǔn)包裝:1 系列:* 其它名稱:MS305720A |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。