- 您现在的位置：买卖IC网 > PDF目录2067 > DS1094LU-42M+ (Maxim Integrated Products)IC ECONOSCILLATOR SS 8-USOP PDF资料下载
参数资料
| 型号： | DS1094LU-42M+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 9/11页 |
| 文件大小： | 0K |
| 描述： | IC ECONOSCILLATOR SS 8-USOP |
| 其它有关文件： | Automotive Product Guide |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 50 |
| 系列： | EconOscillator™ |
| 类型： | 时钟发生器 |
| PLL： | 无 |
| 输入： | 时钟 |
| 输出： | 时钟 |
| 电路数： | 1 |
| 比率 - 输入:输出： | 2:4 |
| 差分 - 输入:输出： | 无/无 |
| 频率 - 最大： | 2MHz |
| 除法器/乘法器： | 是/无 |
| 电源电压： | 3 V ~ 3.6 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-TSSOP，8-MSOP（0.118"，3.00mm 宽） |
| 供应商设备封装： | 8-uMAX |
| 包装： | 管件 |
Prescaler
The prescaler divides the master oscillator frequency,
fMOSC, by 1, 2, 4, or 8. The resultant frequency, fOSC, is
calculated using the following formula:
fOSC = fMOSC / 2PRESCALER
where PRESCALER can be 0 to 3. The prescaler is con-
figured using bits P1 and P0 in the PRESCALER regis-
ter. Valid settings are shown in Table 2. The location of
bits P1 and P0 in the PRESCALER register is shown in
the Control Registers section.
Note that the PRESCALER register also contains bits
controlling other features of the device (dither amount,
dither rate, and phase).
Phase Generator
The four oscillator outputs (OUT1 to OUT4) can be con-
figured in either two-phase, three-phase, or four-phase
mode. The output waveforms of each mode are illus-
trated in Figure 1. Likewise, the figure also shows a
comparison of fOUT, the duty cycle, and the output
phase shifts between the three modes. Bits Ph1 and
Ph0 in the PRESCALER register are used to select the
desired mode (see Table 3). The location of bits Ph1
and Ph0 in the PRESCALER register is shown in the
Control Registers section.
Triangle Wave Generator
The triangle wave generator is used to dither the mas-
ter oscillator frequency, adding spread-spectrum func-
tionality to the DS1094L by injecting an offset element
into the master oscillator. Both the dither amount (%)
and dither frequency are programmable. The dither
amount is controlled by bits J1 and J0 in the
PRESCALER register. The dither frequency is con-
trolled by bits D1 and D0, also in the PRESCALER reg-
ister. The bit settings are shown in Table 4 and 5. The
location of bits J1, J0, D1, and D0 in the PRESCALER
register is shown in the Control Registers section.
When dither is enabled (by selecting a percentage
other than 0%), the master oscillator frequency, fMOSC,
is dithered between the programmed fMOSC and the
selected percentage down from the programmed
fMOSC (see Figure 2). For example, if fMOSC is pro-
grammed to 2MHz (DAC register = 0Ah) and the dither
amount is programmed to 2%, the frequency of fMOSC
DS1094L
Multiphase Spread-Spectrum EconOscillator
_____________________________________________________________________
7
BITS Ph1, Ph0
MODE
00
Two-Phase
01
Three-Phase
10
Four-Phase
11
Reserved
Table 3. Phase Generator Settings
BITS J1, J0
DITHER AMOUNT*
00
0%
01
2%
10
4%
11
8%
Table 4. Dither Amount Settings
BITS D1, D0
DITHER FREQUENCY
00
fMOSC/128
01
fMOSC/256
10
fMOSC/512
11
fMOSC/1024
Table 5. Dither Frequency Settings
OUT1
OUT2
OUT3
OUT4
OUT1
OUT2
OUT3
OUT4
OUT1
OUT2
OUT3
OUT4
fOSC
TWO-PHASE
THREE-PHASE
FOUR-PHASE
50% DUTY CYCLE
33% DUTY CYCLE
120 DEGREES
OUT OF PHASE
180 DEGREES
90 DEGREES OUT
OF PHASE
fOUT = fOSC
OUT OF PHASE
fOUT = fOSC / 3
fOUT = fOSC / 4
Figure 1. DS1094L Output Waveforms
TIME
1
DITHER FREQ.
PROGRAMMED fMOSC
PROGRAMMED fMOSC -
(2, 4, OR 8% OF fMOSC)
DITHER
AMOUNT
(2, 4, OR 8%)
IF DITHER AMOUNT = 0%
f MOSC
Figure 2. DS1094L Dither Waveform
*The frequency is dithered down from the programmed value
of fMOSC.
相关PDF资料 |
PDF描述 |
|---|---|
| DS1099U-BC+ | IC ECONOSCILLATOR DUAL 8USOP |
| DS16EV5110ASQ/NOPB | IC EQUALIZER VIDEO 3D+C 48LLP |
| DS16EV5110ASQX/NOPB | IC EQUALIZER VIDEO 3D+C 48-LLP |
| DS1843D+ | IC CIRCUIT SAMPLE-N-HOLD 8-UDFN |
| DS21602N+ | IC ADAPTER CLOCK RATE 8-DIP |
相关代理商/技术参数 |
参数描述 |
|---|---|
| DS1094LU-42M+ | 功能描述:可编程振荡器 Multiphase Spread Spctrm EconOscillatr RoHS:否 制造商:IDT 封装 / 箱体:5 mm x 7 mm x 1.5 mm 频率:15.476 MHz to 866.67, 975 MHz to 1300 MHz 频率稳定性:+/- 50 PPM 电源电压:3.63 V 负载电容:10 pF 端接类型:SMD/SMT 输出格式:LVPECL 最小工作温度:- 40 C 最大工作温度:+ 85 C 尺寸:7 mm W x 5 mm L x 1.5 mm H 封装: |
| DS1094LU-42M+T | 功能描述:可编程振荡器 Multiphase Spread Spctrm EconOscillatr RoHS:否 制造商:IDT 封装 / 箱体:5 mm x 7 mm x 1.5 mm 频率:15.476 MHz to 866.67, 975 MHz to 1300 MHz 频率稳定性:+/- 50 PPM 电源电压:3.63 V 负载电容:10 pF 端接类型:SMD/SMT 输出格式:LVPECL 最小工作温度:- 40 C 最大工作温度:+ 85 C 尺寸:7 mm W x 5 mm L x 1.5 mm H 封装: |
| DS1099U-01M | 功能描述:可编程振荡器 Low-Frequency Dual EconOscillator RoHS:否 制造商:IDT 封装 / 箱体:5 mm x 7 mm x 1.5 mm 频率:15.476 MHz to 866.67, 975 MHz to 1300 MHz 频率稳定性:+/- 50 PPM 电源电压:3.63 V 负载电容:10 pF 端接类型:SMD/SMT 输出格式:LVPECL 最小工作温度:- 40 C 最大工作温度:+ 85 C 尺寸:7 mm W x 5 mm L x 1.5 mm H 封装: |
| DS1099U-01M/W | 制造商:Maxim Integrated Products 功能描述:W-LOW FREQ DUAL OSC 8P USOP - Rail/Tube |
| DS1099U-AG+ | 功能描述:可编程振荡器 Low-Frequency Dual EconOscillator RoHS:否 制造商:IDT 封装 / 箱体:5 mm x 7 mm x 1.5 mm 频率:15.476 MHz to 866.67, 975 MHz to 1300 MHz 频率稳定性:+/- 50 PPM 电源电压:3.63 V 负载电容:10 pF 端接类型:SMD/SMT 输出格式:LVPECL 最小工作温度:- 40 C 最大工作温度:+ 85 C 尺寸:7 mm W x 5 mm L x 1.5 mm H 封装: |
发布紧急采购，3分钟左右您将得到回复。