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参数资料
| 型号： | ADV3224ACPZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 16/24页 |
| 文件大小： | 0K |
| 描述： | IC CROSSPOINT SW 16X8 72LFCSP |
| 标准包装： | 1 |
| 功能： | 交叉点开关 |
| 电路： | 1 x 16:8 |
| 电压电源： | 双电源 |
| 电压 - 电源，单路/双路(±)： | ±5V |
| 电流 - 电源： | 52mA |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 72-VFQFN 裸露焊盘，CSP |
| 供应商设备封装： | 72-LFCSP-VQ（10x10） |
| 包装： | 托盘 |
ADV3224/ADV3225
Rev. A | Page 23 of 24
POWER-ON RESET
When powering up the ADV3224/ADV3225, it is usually desirable
to have the outputs come up in the disabled state. When taken
low, the RESET pin causes all outputs to be in the disabled state.
However, the
RESET signal does not reset all registers in the
ADV3224/ADV3225. This is important when operating in the
parallel programming mode. Refer to the
section for information about programming internal registers
after power-up. Serial programming programs the entire matrix
each time; therefore, no special considerations apply.
Because the data in the shift register is random after power-up,
it should not be used to program the matrix, or the matrix can
enter unknown states. To prevent the matrix from entering
unknown states, do not apply logic low signals to both CE and
UPDATE initially after power-up. Instead, first load the shift
register with the data and then take UPDATE
The
low to program
the device.
RESET pin has a 20 kΩ pull-up resistor to DVCC that can
be used to create a simple power-up reset circuit. A capacitor
from RESET to ground holds the RESET
GAIN SELECTION
pin low for a period
during which the rest of the device stabilizes. The low condition
causes all of the outputs to be disabled. The capacitor then
charges through the pull-up resistor to the high state, thereby,
allowing full programming capability of the device.
The 16 × 8 crosspoints come in two versions, depending on
the gain of the analog circuit path. The ADV3224 device is unity
gain and can be used for analog logic switching and other
applications where unity gain is desired. The ADV3224 outputs
have very high impedance when their outputs are disabled.
The ADV3225 can be used for devices that drive a terminated
cable with its outputs. This device has a built-in gain of +2 that
eliminates the need for a gain of +2 buffer to drive a video line. Its
high output disabled impedance minimizes signal degradation
when paralleling additional outputs of other crosspoint devices.
CREATING LARGER CROSSPOINT ARRAYS
The ADV3224/ADV3225 are high density building blocks for
creating crosspoint arrays of dimensions larger than 16 × 8.
Various features, such as output disable, chip enable, and gain of
+1 and gain of +2 options, are useful for creating larger arrays.
The first consideration in constructing a larger crosspoint is to
determine the minimum number of devices that is required.
The 16 × 8 architecture of the ADV3224/ADV3225 contains
128 points, which is a factor of 32 greater than a 4 × 1 crosspoint
(or multiplexer). The benefits realized in PCB area used, power
consumption, and design effort are readily apparent when
compared to using multiples of these smaller 4 × 1 devices.
To obtain the minimum number of required points for a non-
blocking crosspoint, multiply the number of inputs by the number
of outputs. Nonblocking requires that the programming of a given
input to one or more outputs not restrict the availability of that
input to be a source for any other outputs. Some nonblocking
crosspoint architectures require more than this minimum. In
addition, there are blocking architectures that can be constructed
with fewer devices than this minimum. These systems have
connectivity available on a statistical basis that is determined
when designing the overall system.
The basic concept in constructing larger crosspoint arrays is
to connect inputs in parallel in a horizontal direction and to
wire-OR the outputs together in the vertical direction. The
wire-OR connection can be viewed as a tristate multiplex of the
two outputs in that only one output is enabled and the other is
in a high-Z state. The meaning of horizontal and vertical can
best be understood by referring to Figure 65, which illustrates
this concept for a 32 × 16 crosspoint array that uses four
ADV3224 or ADV3225 devices.
ADV3224
OR
ADV3225
8
16
RTERM
ADV3224
OR
ADV3225
8
16
RTERM
IN00 TO IN15
ADV3224
OR
ADV3225
8
16
IN16 TO IN31
ADV3224
OR
ADV3225
8
16
09317-
007
Figure 65. A 32 × 16 Nonblocking Crosspoint Switch Array
Each input is uniquely assigned to each of the 32 inputs of the two
devices and terminated appropriately. The outputs are wired-OR’ed
together in pairs. Enable the output from only one wire-OR’ed
pair at any given time. The device programming software must
be properly written to prevent multiple connected outputs from
being enabled at the same time.
Also available are 32 × 16 arrays in a single package: AD8104,
are possible using the ADV3226 and ADV3227 wideband 16 ×
16 arrays. For a complete 32 × 32 array in a single device, use the
ADV3201 for less bandwidth.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| ADV32254902 | 制造商:LG Corporation 功能描述:Frame Assembly,Door |
| ADV3225ACPZ | 功能描述:IC CROSSPOINT SW 16X8 72LFCSP RoHS:是 类别:集成电路 (IC) >> 接口 - 模拟开关，多路复用器，多路分解器 系列:- 应用说明:Ultrasound Imaging Systems Application Note 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:250 系列:- 功能:开关 电路:单刀单掷 导通状态电阻:48 欧姆 电压电源:单电源 电压 - 电源，单路/双路(±):2.7 V ~ 5.5 V 电流 - 电源:5µA 工作温度:0°C ~ 70°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:托盘 |
| ADV3226 | 制造商:AD 制造商全称:Analog Devices 功能描述:750 MHz, 16 × 16 Analog Crosspoint Switch |
| ADV3226ACPZ | 功能描述:IC CROSSPOINT SW 16X16 100LFCSP RoHS:是 类别:集成电路 (IC) >> 接口 - 模拟开关，多路复用器，多路分解器 系列:- 其它有关文件:STG4159 View All Specifications 标准包装:5,000 系列:- 功能:开关 电路:1 x SPDT 导通状态电阻:300 毫欧 电压电源:双电源 电压 - 电源，单路/双路(±):±1.65 V ~ 4.8 V 电流 - 电源:50nA 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:7-WFBGA，FCBGA 供应商设备封装:7-覆晶 包装:带卷 (TR) |
| ADV3226-EVALZ | 制造商:AD 制造商全称:Analog Devices 功能描述:750 MHz, 16 × 16 Analog Crosspoint Switch |
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