參數(shù)資料
型號: LTC6945IUFD#TRPBF
廠商: Linear Technology
文件頁數(shù): 7/28頁
文件大小: 0K
描述: IC SYNTHESIZER INTEGER N 28QFN
軟件下載: PLLWizard™
PLLWizard™, with .NET 2.0 installer
標準包裝: 2,500
類型: *
PLL:
輸入: 時鐘
輸出: 時鐘
電路數(shù): 1
比率 - 輸入:輸出: 1:1
差分 - 輸入:輸出: 是/是
頻率 - 最大: 6GHz
除法器/乘法器: 是/無
電源電壓: 3.15 V ~ 5.25 V
工作溫度: -40°C ~ 105°C
安裝類型: 表面貼裝
封裝/外殼: 28-WFQFN 裸露焊盤
供應商設備封裝: 28-QFN(4x5)
包裝: 帶卷 (TR)
LTC6945
15
6945f
OPERATION
Figure 10. Serial Port Write Sequence
Figure 11. Serial Port Read Sequence
Figure 12. Serial Port Single Byte Write
Multiple Byte Transfers
More efficient data transfer of multiple bytes is accom-
plished by using the LTC6945’s register address auto-
increment feature as shown in Figure 13. The serial port
master sends the destination register address in the first
byte and its data in the second byte as before, but continues
sending bytes destined for subsequent registers. Byte 1’s
address is Addr0+1, Byte 2’s address is Addr0+2, and so
on. If the resister address pointer attempts to increment
past 11 (h0B), it is automatically reset to 0.
An example of an auto-increment read from the part is
shown in Figure 14. The first byte of the burst sent from
the serial bus master on SDI contains the destination
register address (Addr0) and an LSB of “1” indicating a
read. Once the LTC6945 detects a read burst, it takes SDO
out of the Hi-Z condition and sends data bytes sequentially,
beginning with data from register Addr0. The part ignores
all other data on SDI until the end of the burst.
Multidrop Configuration
Several LTC6945s may share the serial bus. In this multidrop
configuration, SCLK, SDI and SDO are common between
all parts. The serial bus master must use a separate CS
for each LTC6945 and ensure that only one device has
CS asserted at any time. It is recommended to attach a
high value resistor to SDO to ensure the line returns to a
known level during Hi-Z states.
A6 A5 A4 A3 A2
7-BIT REGISTER ADDRESS
Hi-Z
MASTER–CS
MASTER–SCLK
MASTER–SDI
LTC6945–SD0
A1 A0 0 D7 D6 D5 D4 D3 D2 D1 D0
8 BITS OF DATA
0 = WRITE
6945 F10
16 CLOCKS
A6 A5 A4 A3 A2
7-BIT REGISTER ADDRESS
Hi-Z
A1 A0 1
D7
X
D6 D5 D4 D3 D2 D1 D0 DX
8 BITS OF DATA
1 = READ
6945 F11
MASTER–CS
MASTER–SCLK
MASTER–SDI
LTC6945–SDO
16 CLOCKS
Addr0 + Wr
Hi-Z
MASTER–CS
MASTER–SDI
LTC6945–SDO
Byte 0
Addr1 + Wr
Byte 1
6945 F12
相關PDF資料
PDF描述
LTC6946IUFD-3#TRPBF IC INTEGER-N PLL W/VCO 28QFN
LTC6993HDCB-3#TRPBF IC MONOSTABLE MULTIVIBRATOR 6DFN
LV3313PM-TLM-E IC ELECTRONIC VOLUME AUTO 44QLP
LV3319PM-V147-NE IC ELECTRONIC VOLUME AUTO 44QLP
LV3328PM-TLM-E IC ELECTRONIC VOLUME AUTO 44QLP
相關代理商/技術參數(shù)
參數(shù)描述
LTC6946-1 制造商:LINER 制造商全稱:Linear Technology 功能描述:30MHz to 1.4GHz IQ Demodulator
LTC6946-2 制造商:LINER 制造商全稱:Linear Technology 功能描述:30MHz to 1.4GHz IQ Demodulator
LTC6946-3 制造商:LINER 制造商全稱:Linear Technology 功能描述:30MHz to 1.4GHz IQ Demodulator
LTC6946IUFD-1#PBF 功能描述:IC INTEGER-N PLL W/VCO 28-QFN RoHS:是 類別:集成電路 (IC) >> 時鐘/計時 - 時鐘發(fā)生器,PLL,頻率合成器 系列:- 標準包裝:2,000 系列:- 類型:PLL 頻率合成器 PLL:是 輸入:晶體 輸出:時鐘 電路數(shù):1 比率 - 輸入:輸出:1:1 差分 - 輸入:輸出:無/無 頻率 - 最大:1GHz 除法器/乘法器:是/無 電源電壓:4.5 V ~ 5.5 V 工作溫度:-20°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:16-LSSOP(0.175",4.40mm 寬) 供應商設備封裝:16-SSOP 包裝:帶卷 (TR) 其它名稱:NJW1504V-TE1-NDNJW1504V-TE1TR
LTC6946IUFD-1#TRPBF 功能描述:IC INTEGER-N PLL W/VCO 28QFN RoHS:是 類別:集成電路 (IC) >> 時鐘/計時 - 時鐘發(fā)生器,PLL,頻率合成器 系列:- 標準包裝:1,000 系列:Precision Edge® 類型:時鐘/頻率合成器 PLL:無 輸入:CML,PECL 輸出:CML 電路數(shù):1 比率 - 輸入:輸出:2:1 差分 - 輸入:輸出:是/是 頻率 - 最大:10.7GHz 除法器/乘法器:無/無 電源電壓:2.375 V ~ 3.6 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:16-VFQFN 裸露焊盤,16-MLF? 供應商設備封裝:16-MLF?(3x3) 包裝:帶卷 (TR) 其它名稱:SY58052UMGTRSY58052UMGTR-ND