- 您现在的位置：买卖IC网 > PDF目录1996 > HMC703LP4E (Hittite Microwave Corporation)IC FRACT-N PLL W/SWEEPR 24QFN PDF资料下载
参数资料
| 型号： | HMC703LP4E |
| 厂商： | Hittite Microwave Corporation |
| 文件页数： | 29/58页 |
| 文件大小： | 0K |
| 描述： | IC FRACT-N PLL W/SWEEPR 24QFN |
| 标准包装： | 1 |
| 类型： | 整数 N/小数 N 分频 |
| PLL： | 是 |
| 输入： | CMOS |
| 输出： | CMOS |
| 电路数： | 1 |
| 比率 - 输入:输出： | 1:1 |
| 差分 - 输入:输出： | 是/无 |
| 频率 - 最大： | 8GHz |
| 除法器/乘法器： | 是/无 |
| 电源电压： | 3.3V，5V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 24-VQFN 裸露焊盘 |
| 供应商设备封装： | 24-QFN 裸露焊盘（4x4） |
| 包装： | 标准包装 |
| 其它名称： | 1127-1065-6 |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页当前第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页第46页第47页第48页第49页第50页第51页第52页第53页第54页第55页第56页第57页第58页
P
LL
s
-
s
M
T
6 - 35
HMC703LP4E
v02.0813
8 GHz fractional syntHesizer
For price, delivery and to place orders: Hittite Microwave Corporation, 2 Elizabeth Drive, Chelmsford, MA 01824
978-250-3343 978-250-3373 fax Order On-line at www.hittite.com
Application Support: pll@hittite.com
PD Polarity
Reg 0Bh[4]=0 sets the PD polarity for use with a passive loop filter together with a VCO with a positive tuning slope
(increasing tuning voltage increases VCO frequency).
Reg 0Bh[4]=1 inverts the PD polarity. This is most often used if an inverting op-amp is used in an active loop filter
together with a VCO with a positive tuning slope.
charge Pump tri-state
Reg 0Bh[5]=Reg 0Bh[6]=0 tri-states the charge pump. This effectively freezes charge on the loop filter and allows the
VCO to run open loop, provided that CP offset is also disabled.
charge Pump Gain
Reg 09h[6:0] and Reg 09h[13:7] program current gain settings for the charge pump. Pump ranges can be set from 0 A
to 2.54 mA in 20uA steps. Charge pump gain affects the loop bandwidth. The product of VCO gain (Kvco) and charge
pump gain (Kcp) can be held constant for VCO’s that have a wide ranging Kvco by adjusting the charge pump gain. This
compensation helps to keep the loop bandwidth constant.
In addition to the normal CP current as described above, there is also an extra output source of current that offers
improved noise performance. HiKcp provides an output current that is proportional to the loop filter voltage. This being
the case, HiKcp should only be operated with active op-amp loop filters that define the voltage as seen by the charge
pump pin. With 2.5 V as observed at the charge pump pin, the HiKcp current is 3.5 mA.
There are several configurations that could be used with the HiKcp feature. For lowest noise, HiKcp could be used
without the normal charge pump current (the charge pump current would be set to 0). In this case, the loop filter would
be designed with 3.5 mA as the effective charge pump current.
Another possible configuration is to operate with both the HiKcp and normal charge pump current sources. In this case
the effective charge pump current would be 3.5mA + programmed normal charge pump current which could offer a
maximum of 6 mA.
With passive loop filters the voltage seen by the charge pump pin will vary which would cause the HiKcp current to vary
widely. As such, HiKcp should not be used on passive loop filter implementations.
A simplified diagram of the charge pump is shown in Figure 39. The current gain of the pump in Amps/radian is equal
to the gain setting of this register divided by 2π.
charge Pump offset
Reg 09h[20:14] controls the charge pump current offsets. Reg 09h[21] and Reg 09h[22] enable the UP and DN offset
currents respectively. Normally, only one is used at a time. As mentioned earlier charge pump offsets affect fractional
mode linearity . Offset polarity should be chosen such that the divided VCO lags the reference signal. This means
down for non-inverting loop filters.
相关PDF资料 |
PDF描述 |
|---|---|
| HMC704LP4E | IC FRACT-N PLL 16BIT 24QFN |
| HMC830LP6GE | IC FRACT-N PLL W/VCO 40QFN |
| HMP8117CNZ | IC VIDEO DECODER NTSC/PAL 80PQFP |
| HMP8156ACNZ | IC VIDEO ENCODER NTSC/PAL 64MQFP |
| HSP45102SC-40Z | IC OSC NCO 40MHZ 28-SOIC |
相关代理商/技术参数 |
参数描述 |
|---|---|
| HMC703LP4ETR | 制造商:Hittite Microwave Corp 功能描述:IC FRACT-N PLL W/SWEEPR 24QFN 制造商:Hittite Microwave Corp 功能描述:8 GHz Fractional-N PLL with Sweeper |
| HMC7043LP7FE | 功能描述:IC FRACT-N PLL W/SWEEPR 48LFCSP 制造商:analog devices inc. 系列:- 包装:剪切带（CT） 零件状态:新产品 类型:* PLL:是 输入:时钟 输出:CML，LVDS，LVPECL 电路数:1 比率 - 输入:输出:1：14 差分 - 输入:输出:是/是 频率 - 最大值:3.2GHz 分频器/倍频器:是/无 电压 - 电源:3.135 V ~ 3.465 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:48-VFQFN 裸露焊盘，CSP 供应商器件封装:48-LFCSP（7x7） 标准包装:1 |
| HMC7043LP7FETR | 功能描述:IC FRACT-N PLL W/SWEEPR 48LFCSP 制造商:analog devices inc. 系列:- 包装:剪切带（CT） 零件状态:在售 类型:时钟缓冲器 PLL:是 输入:时钟 输出:CMOS，LVDS，LVPECL 电路数:1 比率 - 输入:输出:1：14 差分 - 输入:输出:是/是 频率 - 最大值:3.2GHz 分频器/倍频器:是/无 电压 - 电源:3.135 V ~ 3.465 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:48-VFQFN 裸露焊盘，CSP 供应商器件封装:48-LFCSP（7x7） 标准包装:1 |
| HMC7044LP10BETR | 功能描述:IC JITTER ATTENUATOR 68LFCSP 制造商:analog devices inc. 系列:- 包装:剪切带（CT） 零件状态:在售 类型:漂移衰减器 PLL:是 输入:CML，CMOS，LVDS，LVPECL 输出:CML，LVDS，LVPECL 电路数:1 比率 - 输入:输出:4:14 差分 - 输入:输出:是/是 频率 - 最大值:3.2GHz 分频器/倍频器:是/无 电压 - 电源:3.135 V ~ 3.465 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:68-VFQFN 裸露焊盘，CSP 供应商器件封装:68-LFCSP-VQ（10x10） 标准包装:1 |
| HMC704LP4E | 功能描述:IC FRACT-N PLL 16BIT 24QFN RoHS:是 类别:集成电路 (IC) >> 时钟/计时 - 时钟发生器，PLL，频率合成器 系列:- 标准包装:2,000 系列:- 类型:PLL 频率合成器 PLL:是 输入:晶体 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:1GHz 除法器/乘法器:是/无 电源电压:4.5 V ~ 5.5 V 工作温度:-20°C ~ 85°C 安装类型:表面贴装 封装/外壳:16-LSSOP（0.175"，4.40mm 宽） 供应商设备封装:16-SSOP 包装:带卷 (TR) 其它名称:NJW1504V-TE1-NDNJW1504V-TE1TR |
发布紧急采购，3分钟左右您将得到回复。