参数资料
| 型号： | AD6654BBC |
| 厂商： | Analog Devices Inc |
| 文件页数： | 54/88页 |
| 文件大小： | 0K |
| 描述： | IC ADC 14BIT W/6CH RSP 256CSPBGA |
| 标准包装： | 1 |
| 位数： | 14 |
| 采样率（每秒）： | 92.16M |
| 数据接口： | 串行，并联 |
| 转换器数目： | 1 |
| 功率耗散（最大）： | 2.5W |
| 电压电源： | 模拟和数字 |
| 工作温度： | -25°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 256-BGA，CSPBGA |
| 供应商设备封装： | 256-CSPBGA（17x17） |
| 包装： | 托盘 |
| 输入数目和类型： | 1 个差分，单极 |
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页当前第54页第55页第56页第57页第58页第59页第60页第61页第62页第63页第64页第65页第66页第67页第68页第69页第70页第71页第72页第73页第74页第75页第76页第77页第78页第79页第80页第81页第82页第83页第84页第85页第86页第87页第88页
AD6654
Rev. 0 | Page 58 of 88
CHIP SYNCHRONIZATION
The AD6654 offers two types of synchronization: start sync and
hop sync. Start sync is used to bring individual channels out of
sleep after programming. It can also be used while AD6654 is
operational to resynchronize the internal clocks. Hop sync is
used to change or update the NCO frequency tuning word and
the NCO phase offset word.
Two methods can be used to initiate a start sync or hop sync:
Soft sync is provided by the memory map registers and is
applied to channels directly through the microport or serial
port interface.
Pin sync is provided using four hard-wired SYNC[3:0] pins.
Each channel is programmed to listen to one of these SYNC
pins and do a start sync or a hop sync when a signal is
received on these pins.
The pin synchronization configuration register (Address 0x04)
is used to make pin synchronization even more flexible. The
part can be programmed to be edge-sensitive or level-sensitive
for SYNC pins. In edge-sensitive mode, a rising edge on the
SYNC pins is recognized as a synchronization event.
START
Start refers to the startup of an individual channel or chip, or of
multiple chips. If a channel is not used, it should be put into
sleep mode to reduce power dissipation. Following a hard reset
(low pulse on the RESET pin), all channels are placed into sleep
mode. Alternatively, channels can be manually put to sleep by
writing 0 to the sleep register.
Start with Soft Sync
The AD6654 can synchronize channels or chips under micro-
processor control. The start hold-off counter, in conjunction
with the soft start enable bit and the channel enable bits, enables
this synchronization.
To synchronize the start of multiple channels via micro-
processor control:
1.
Write the channel enable register to enable one or more
channels, if the channels are inactive.
2.
Write the NCO start hold-off counter registers with the
appropriate value (greater than 0 and less than 216).
3.
Write the soft sync channel enable bit(s) and soft start
synchronization enable bit high in the soft synchroniza-
tion configuration register. This starts the countdown by
the start hold-off counter. When the count reaches 1, the
channels are activated or resynchronized.
Note: When using SPI or SPORT for programming these
registers, the last step in the above procedure needs to be
repeated, that is, the soft synchronization register needs to be
written twice.
Start with Pin Sync
Four sync pins (SYNC0, SYNC1, SYNC2, and SYNC3) provide
very accurate synchronization among channels. Each channel
can be programmed to monitor any of the four sync pins.
To start the channels with a pin sync:
1.
Write the channel register to enable one more channels, if
the channels are inactive.
2.
Write the NCO start hold-off counter registers with the
appropriate value (greater than 0 and less than 216).
3.
Program the channel NCO control registers to monitor
the appropriate SYNC pins.
4.
Write the start synchronization enable bit and SYNC pin
enable bits high in the pin synchronization configuration
register. This starts the countdown of the start hold-off
counter. When the count reaches 1, the channels are
activated or resynchronized.
HOP
Hop is a jump from one NCO frequency and/or phase offset to
a new NCO frequency and/or phase offset. This change in
frequency and/or phase offset can be synchronized via micro-
processor control (soft sync) or via an external sync signal
(pin sync).
Hop with Soft Sync
The AD6654 can synchronize a change in NCO frequency
and/or phase offset of multiple channels or chips under
microprocessor control. The NCO hop hold-off counter, in
conjunction with the soft hop enable bit and the channel enable
bits, enables this synchronization.
To synchronize the hop of multiple channels via microprocessor
control:
1.
Write the NCO frequency register(s) or phase offset
register(s) to the new value.
2.
Write the NCO frequency hold-off counter registers with
the appropriate value (greater than 0 and less than 216).
3.
Write 0x00 to the soft synchronization configuration
register.
4.
Write the soft hop synchronization enable bit and the
corresponding soft sync channel enable bits high in the
soft synchronization configuration register. This starts the
countdown by the frequency hold-off counter. When the
相关PDF资料 |
PDF描述 |
|---|---|
| AD670KNZ | IC ADC 8BIT SGNL COND 20DIP |
| AD673JNZ | IC ADC 8BIT REF/CLK/COMP 20DIP |
| AD674BJN | IC ADC 12BIT MONO 3OUT 28-DIP |
| AD676BD | IC ADC 16BIT SAMPLING 28-CDIP |
| AD677BD | IC ADC 16BIT SAMPLING 16-CDIP |
相关代理商/技术参数 |
参数描述 |
|---|---|
| AD6654BBCZ | 功能描述:IC ADC 14BIT W/6CH RSP 256CSPBGA RoHS:是 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:250 系列:- 位数:12 采样率（每秒）:1.8M 数据接口:并联 转换器数目:1 功率耗散（最大）:1.82W 电压电源:模拟和数字 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:48-LQFP 供应商设备封装:48-LQFP（7x7） 包装:管件 输入数目和类型:2 个单端，单极 |
| AD6654CBC | 功能描述:IC ADC 14BIT W/4CH RSP 256CSPBGA RoHS:否 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:250 系列:- 位数:12 采样率（每秒）:1.8M 数据接口:并联 转换器数目:1 功率耗散（最大）:1.82W 电压电源:模拟和数字 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:48-LQFP 供应商设备封装:48-LQFP（7x7） 包装:管件 输入数目和类型:2 个单端，单极 |
| AD6654CBCZ | 功能描述:IC ADC 14BIT W/4CH RSP 256CSPBGA RoHS:是 类别:集成电路 (IC) >> 数据采集 - 模数转换器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:250 系列:- 位数:12 采样率（每秒）:1.8M 数据接口:并联 转换器数目:1 功率耗散（最大）:1.82W 电压电源:模拟和数字 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:48-LQFP 供应商设备封装:48-LQFP（7x7） 包装:管件 输入数目和类型:2 个单端，单极 |
| AD6654XBCZ | 制造商:Analog Devices 功能描述:14-BIT, 92.16 MSPS, 4 & 6-CHANNEL WIDEBAND IF TO BASE BAND R - Bulk |
| AD6655 | 制造商:AD 制造商全称:Analog Devices 功能描述:IF Diversity Receiver |
发布紧急采购，3分钟左右您将得到回复。