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| 型号： | DS1091LUA-066+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 6/9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： | 扩展频谱时钟发生器 |
| PLL： | 无 |
| 输入： | 时钟 |
| 输出： | 时钟 |
| 电路数： | 1 |
| 比率 - 输入:输出： | 1:1 |
| 差分 - 输入:输出： | 无/无 |
| 频率 - 最大： | 66.6MHz |
| 除法器/乘法器： | 是/无 |
| 电源电压： | 3 V ~ 3.6 V |
| 工作温度： | -40°C ~ 125°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 |
DS1091L
Automotive Temperature Range
Spread-Spectrum EconOscillator
6
Maxim Integrated
Detailed Description
The DS1091L clock generator is capable of output fre-
quencies from 130kHz to 66.6MHz over the full automo-
tive temperature range (-40°C to +125°C). The device
can also produce a spread-spectrum (dithered) square-
wave output using four pin-selectable dither percent-
ages. Both center (DS1091LUA) and down (DS1091LUB)
dithering options are available. The device also features
two selectable dither rates.
The DS1091L is shipped from the factory programmed to
a customer-specified frequency.
Spread Spectrum
The DS1091L can reduce radiated emission peaks. The
dither percentage is controlled by the state of the SEL0
and SEL1 pins. The output frequency can be dithered
at 0%, ±1%, ±2%, and ±4%, centered around the pro-
grammed frequency (for the DS1091LUB this can be
down dithered by 0%, -2%, -4%, and -8%).
The two select pins SEL0 and SEL1 provide a means of
selecting the dither magnitudes as follows:
A triangle-wave generator injects a control signal into the
master oscillator to dither its output. The dither rate is a
function of the output frequency, fOUT, as well as the set-
ting of the DR pin (see the equation below). Figure 1A and
Figure 1B show a plot of the output frequency vs. time.
OUT
n
f
DITHER RATE
2
=
where n is defined in Table 2 as a function of output
frequency. For example, for an output frequency of
27.0MHz, the dither rate would be 13.2kHz for DR = 1
and 6.6kHz for DR = 0.
Power-Up
Upon the application of power, the DS1091L output is
held in the low state until tPU has elapsed. This removes
any possibility of erroneous output transitions during ini-
tial power-up.
DS1091L Frequency Spreading Profile as a Function of Dither %
Figure 1A. Center Dithered
Figure 1B. Down Dithered
Table 1. Dither Magnitude
Table 2. Value of n w.r.t. Output Frequency
SEL1
LOGIC
LEVEL
SEL0
LOGIC
LEVEL
DITHER MAGNITUDE (%)
DS1091LUA
DS1091LUB
0
No dither
0
1
Q
1
-2
1
0
Q
2
-4
1
Q
4
-8
OUTPUT FREQUENCY fOUT
(MHz)
n
fOUT (min)
fOUT (max)
DR = LOGIC
LEVEL 1
DR = LOGIC
LEVEL 0
0.130
0.260
4
5
0.261
0.521
5
6
0.522
1.042
6
7
1.043
2.083
7
8
2.084
4.167
8
9
4.168
8.333
9
10
8.334
16.667
10
11
16.668
33.333
11
12
33.334
66.667
12
13
TIME
1
DITHER FREQ
PROGRAMMED fOUT+
(1%, 2%, OR 4% OF fOUT)
PROGRAMMED fOUT-
(1%, 2%, OR 4% OF fOUT)
PROGRAMMED fOUT
DITHER
AMOUNT
(±1%, ±2%,
OR ±4%)
IF DITHER AMOUNT = 0%
f OUT
TIME
1
DITHER FREQ
PROGRAMMED fOUT
PROGRAMMED fOUT-
(2%, 4%, OR 8% OF fOUT)
DITHER
AMOUNT
(-2%, -4%,
OR -8%)
IF DITHER AMOUNT = 0%
f OUT
相关PDF资料 |
PDF描述 |
|---|---|
| DS1091LUB-027+ | IC ECONOSCILLATOR SS 8-USOP |
| PX0411/06S/4550 | CONN RCPT 6POS FEMALE RED |
| VI-21Z-MY-F3 | CONVERTER MOD DC/DC 2V 20W |
| MAX532BCWE+ | IC MDAC DUAL V-OUT 12BIT 16-SOIC |
| DS1091LUB-066+ | IC ECONOSCILLATOR SS 8-USOP |
相关代理商/技术参数 |
参数描述 |
|---|---|
| DS1091LUA-066/V+ | 功能描述:时钟发生器及支持产品 RoHS:否 制造商:Silicon Labs 类型:Clock Generators 最大输入频率:14.318 MHz 最大输出频率:166 MHz 输出端数量:16 占空比 - 最大:55 % 工作电源电压:3.3 V 工作电源电流:1 mA 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:QFN-56 |
| DS1091LUA-066/V+T | 功能描述:时钟发生器及支持产品 RoHS:否 制造商:Silicon Labs 类型:Clock Generators 最大输入频率:14.318 MHz 最大输出频率:166 MHz 输出端数量:16 占空比 - 最大:55 % 工作电源电压:3.3 V 工作电源电流:1 mA 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:QFN-56 |
| DS1091LUA-066+ | 功能描述:时钟发生器及支持产品 Spread-Spectrum EconOscillator Auto RoHS:否 制造商:Silicon Labs 类型:Clock Generators 最大输入频率:14.318 MHz 最大输出频率:166 MHz 输出端数量:16 占空比 - 最大:55 % 工作电源电压:3.3 V 工作电源电流:1 mA 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:QFN-56 |
| DS1091LUA-066+T | 功能描述:时钟发生器及支持产品 Spread-Spectrum EconOscillator Auto RoHS:否 制造商:Silicon Labs 类型:Clock Generators 最大输入频率:14.318 MHz 最大输出频率:166 MHz 输出端数量:16 占空比 - 最大:55 % 工作电源电压:3.3 V 工作电源电流:1 mA 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:QFN-56 |
| DS1091LUA-10A/V+ | 功能描述:时钟发生器及支持产品 Spread-Spectrum EconOscillator Auto RoHS:否 制造商:Silicon Labs 类型:Clock Generators 最大输入频率:14.318 MHz 最大输出频率:166 MHz 输出端数量:16 占空比 - 最大:55 % 工作电源电压:3.3 V 工作电源电流:1 mA 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:QFN-56 |
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