参数资料
| 型号： | AD8152JBP |
| 厂商： | Analog Devices Inc |
| 文件页数： | 11/32页 |
| 文件大小： | 0K |
| 描述： | IC CROSSPOINT SWIT 34X34 256BGA |
| 标准包装： | 1 |
| 系列： | XStream™ |
| 功能： | 交叉点开关 |
| 电路： | 1 x 34:34 |
| 电压电源： | 单电源 |
| 电压 - 电源，单路/双路(±)： | 2.25 V ~ 3.63 V |
| 工作温度： | 0°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 256-LBGA 裸露焊盘 |
| 供应商设备封装： | 256-SBGA（27x27） |
| 包装： | 托盘 |
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REV. A
AD8152
–19–
is powered down. Thus, the total number of active inputs will
affect the total power consumption.
The core of the device performs the crosspoint switching function.
It draws a fixed quiescent current whenever the AD8152 is
powered from VCC to VEE.
An output predriver section draws a current that is proportional
to the programmed output current, IOUT. This current always
flows from VCC to VEE. It is treated separately from the output
current, which flows from VTTO, and might not be the same
voltage as VCC.
The final section is the outputs. For an individual output, the
programmed output current will flow through two separate paths.
One is the on-chip termination resistor, and the other is the
transmission line and the destination termination resistor. The
nominal parallel impedance of these two paths is 25
W. The sum
INPUT
TERMINATIONS
INPUTS
OUT-
PUTS
VTTI
VEE
VCC
VTTO
VTT
50
INP
INN
50
IOUT
OUTP
OUTN
50
OUTPUT TERMINATIONS
VOL = VTTO – (IOUT
25 )
DRIVEN DEVICE
TERMINATIONS
OPTIONAL COUPLING CAPACITORS
SWITCH
MATRIX
OUTPUT
PRE-
DRIVER
I = 32mA
I = .25 IOUT
50
IOUT
2
P =
(Vindiffrms)
2
100
(VOL) (IOUT)
P =
I = 2mA
PER
ACTIVE
INPUT
Figure 9. Power Consumption Block Diagram
Table X. Power Consumption
Output
Input
Output
Switch +
Termination
Input
Output
Termination
Current
Total
Resistors
Stage
Core
Predriver
Resistors
Source
Power
Quiescent Current
32 mA
Current per Active Channel
VIN/(RTERMINATION) 2 mA
0.25
IOUT 0.5 IOUT
IOUT
Current per Active Channel
for Differential
VIN = 800 mV p-p Sine
566 mV rms/100
VOUT = 800 mV p-p
= 5.66 mA
2 mA
4 mA
8 mA
16 mA
2.5 V Operation (VCC – VEE = 2.5 V, VTTO = 2.5 V, IOUT = 16 mA)
Per Channel Power
3.2 mW
5 mW
10 mW
8 mW
33.6 mW
Power for All Channels Active
108.8 mW
170 mW
80 mW
340 mW
272 mW
1.03 W
2.0 W
Percentage of Total Power
5%
8%
4%
17%
13.6%
51%
3.3 V Operation (VCC – VEE = 3.3 V, VTTO = 3.3 V, IOUT = 16 mA)
Per Channel Power
3.2 mW
6.6 mW
13.2 mW
8 mW
46.4 mW
Power for All Channels Active
108.8 mW
224 mW
106 mW
449 mW
272 mW
1.47 W
2.63 W
Percentage of Total Power
4%
9%
4%
17%
10%
56%
AD8152 POWER CONSUMPTION
There are several sections of the AD8152 that draw varying
power depending on the supply voltages, the type of I/O coupling
used, and the status of the AD8152 operation. Figure 9 shows a
block diagram of these sections. These are described briefly below
and then in detail later in the data sheet. Table X summarizes the
power consumption of each section and is a useful guide as the
following sections are reviewed.
The first section is the input termination resistors. The power
dissipated in the termination resistors is the result of their being
driven by the respective driving stage. Also, there might be dc power
dissipated in the input termination resistors if the inputs are
dc-coupled and the driving source reference is a dc voltage that is
not equal to VTTI.
In the next section, the active part of the input stages, each input
is powered only when it is selected. If an input is not selected, it
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