基于MAX19994A设计的双路RF下变换方案
基于max19994a设计的双路rf下变换方案
maxim公司的max19994a是双路rf下变换器,rf范围从1200mhz到2000mhz,lo范围从1450mhz 到 2050mhz,if范围从50mhz到500mhz,典型的转换增益为8.4db,典型的噪音为9.8db,输入ip3典型值为+25dbm,输入1db压缩点为+14dbm,单电源5.0v 或3.3v工作,主要用在wcdma/lte,td-scdma,gsm/edge和cdma2000m 无线基站,无线本地回路(wll),固定宽带无线接入,私人移动电台和军用系统.本文介绍max19994a主要特性,功能方框图,以及典型应用电路图和所用元件表.
the max19994a dual-channel downconverter is designed to provide 8.4db of conversion gain, +25dbm input ip3, +14dbm 1db input compression point, and a noise figure of 9.8db for 1200mhz to 2000mhz diversity receiver applications. with an optimized lo frequency range of 1450mhz to 2050mhz, this mixer supports both high- and low-side lo injection architectures for the 1200mhz to 1700mhz and 1700mhz to 2000mhz rf bands, respectively.
in addition to offering excellent linearity and noise performance, the device also yields a high level of component integration. this device includes two double-balanced passive mixer cores, two lo buffers, a dual-input lo selectable switch, and a pair of differential if output amplifiers. integrated on-chip baluns allow for singleended rf and lo inputs. the max19994a requires a nominal lo drive of 0dbm and a typical supply current of 330ma at vcc = 5.0v, or 264ma at vcc = 3.3v.
the max19994a is pin compatible with the max9985/ max9995/max19985a/max19993/max19995/ max19995a series of 700mhz to 2500mhz mixers and pin similar with the max19997a/max19999 series of 1850mhz to 4000mhz mixers, making this entire family of downconverters ideal for applications where a common pcb layout is used across multiple frequency bands.
the device is available in a 6mm x 6mm, 36-pin thin qfn package with an exposed pad. electrical performance is guaranteed over the extended temperature range, from tc = -40nc to +85nc.
max19994a主要特性:
1200mhz to 2000mhz rf frequency range
1450mhz to 2050mhz lo frequency range
50mhz to 500mhz if frequency range
8.4db typical conversion gain
9.8db typical noise figure
+25dbm typical input ip3
+14dbm typical input 1db compression point
68dbc typical 2lo - 2rf spurious rejection at prf = -10dbm
dual channels ideal for diversity receiver application
47db typical channel-to-channel isolation
low -6dbm to +3dbm lo drive
integrated lo buffer
internal rf and lo baluns for single-ended inputs
built-in spdt lo switch with 48db lo-to-lo isolation and 50ns switching time
pin compatible with the max9985/max9995/max19985a/max19993/max19995/max19995a series of 700mhz to 2200mhz mixers
pin similar to the max19997a/max19999 series of 1850mhz to 4000mhz mixers
single 5.0v or 3.3v supply
external current-setting resistors provide option for operating device in reduced-power/reduced-performance mode
max19994a应用:
wcdma/lte base stations
td-scdma base stations
gsm/edge base stations
cdma2000m base stations
wireless local loop
fixed broadband wireless access
private mobile radios
military systems
图1.max19994a功能方框图
图2.max19994a典型应用电路图
所用元件值:
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maxim公司的max19994a是双路rf下变换器,rf范围从1200mhz到2000mhz,lo范围从1450mhz 到 2050mhz,if范围从50mhz到500mhz,典型的转换增益为8.4db,典型的噪音为9.8db,输入ip3典型值为+25dbm,输入1db压缩点为+14dbm,单电源5.0v 或3.3v工作,主要用在wcdma/lte,td-scdma,gsm/edge和cdma2000m 无线基站,无线本地回路(wll),固定宽带无线接入,私人移动电台和军用系统.本文介绍max19994a主要特性,功能方框图,以及典型应用电路图和所用元件表.
the max19994a dual-channel downconverter is designed to provide 8.4db of conversion gain, +25dbm input ip3, +14dbm 1db input compression point, and a noise figure of 9.8db for 1200mhz to 2000mhz diversity receiver applications. with an optimized lo frequency range of 1450mhz to 2050mhz, this mixer supports both high- and low-side lo injection architectures for the 1200mhz to 1700mhz and 1700mhz to 2000mhz rf bands, respectively.
in addition to offering excellent linearity and noise performance, the device also yields a high level of component integration. this device includes two double-balanced passive mixer cores, two lo buffers, a dual-input lo selectable switch, and a pair of differential if output amplifiers. integrated on-chip baluns allow for singleended rf and lo inputs. the max19994a requires a nominal lo drive of 0dbm and a typical supply current of 330ma at vcc = 5.0v, or 264ma at vcc = 3.3v.
the max19994a is pin compatible with the max9985/ max9995/max19985a/max19993/max19995/ max19995a series of 700mhz to 2500mhz mixers and pin similar with the max19997a/max19999 series of 1850mhz to 4000mhz mixers, making this entire family of downconverters ideal for applications where a common pcb layout is used across multiple frequency bands.
the device is available in a 6mm x 6mm, 36-pin thin qfn package with an exposed pad. electrical performance is guaranteed over the extended temperature range, from tc = -40nc to +85nc.
max19994a主要特性:
1200mhz to 2000mhz rf frequency range
1450mhz to 2050mhz lo frequency range
50mhz to 500mhz if frequency range
8.4db typical conversion gain
9.8db typical noise figure
+25dbm typical input ip3
+14dbm typical input 1db compression point
68dbc typical 2lo - 2rf spurious rejection at prf = -10dbm
dual channels ideal for diversity receiver application
47db typical channel-to-channel isolation
low -6dbm to +3dbm lo drive
integrated lo buffer
internal rf and lo baluns for single-ended inputs
built-in spdt lo switch with 48db lo-to-lo isolation and 50ns switching time
pin compatible with the max9985/max9995/max19985a/max19993/max19995/max19995a series of 700mhz to 2200mhz mixers
pin similar to the max19997a/max19999 series of 1850mhz to 4000mhz mixers
single 5.0v or 3.3v supply
external current-setting resistors provide option for operating device in reduced-power/reduced-performance mode
max19994a应用:
wcdma/lte base stations
td-scdma base stations
gsm/edge base stations
cdma2000m base stations
wireless local loop
fixed broadband wireless access
private mobile radios
military systems
图1.max19994a功能方框图
图2.max19994a典型应用电路图
所用元件值:
湖北师范大学党委常委、副校长余涛莅临本源量子考察调研
眼部按摩仪离线语音控制芯片——NRK3301
首个全国集成电路标准化组织即将成立
浅析相控阵的角分辨力和精度
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