- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄373936 > AD8113JST (ANALOG DEVICES INC) Audio/Video 60 MHz 16 X 16, G = + 2 Crosspoint Switch PDF資料下載
參數(shù)資料
| 型號： | AD8113JST |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 運(yùn)動(dòng)控制電子 |
| 英文描述： | Audio/Video 60 MHz 16 X 16, G = + 2 Crosspoint Switch |
| 中文描述： | 16-CHANNEL, CROSS POINT SWITCH, PQFP100 |
| 封裝： | 14 X 14 MM, PLASTIC, LQFP-100 |
| 文件頁數(shù)： | 15/28頁 |
| 文件大?。?/td> | 1391K |
| 代理商： | AD8113JST |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁當(dāng)前第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁
REV. A
AD8113
–15–
CALCULATION OF POWER DISSIPATION
AMBIENT TEMPERATURE – C
0
70
2.0
3.0
4.0
3.5
2.5
60
50
40
30
20
10
M
T
J
= 150 C
Figure 6. Maximum Power Dissipation vs. Ambient
Temperature
The above curve was calculated from
P
T
T
D MAX
,
NCTION MAX
JU
AMBIENT
A
,
–
=
(
)
J
θ
As an example, if the AD8113 is enclosed in an environment at
50
°
C (T
A
), the total on-chip dissipation under all load and supply
conditions must not be allowed to exceed 2.5 W.
When calculating on-chip power dissipation, it is necessary to
include the rms current being delivered to the load, multiplied
by the rms voltage drop on the AD8113 output devices. The
dissipation of the on-chip, 4 k
feedback resistor network must
also be included. For a sinusoidal output, the on-chip power
dissipation due to the load and feedback network can be approxi-
mated by
P
AV
V
I
V
k
D MAX
,
CC
OUTPUT RMS
OUTPUT RMS
OUTPUT RMS
4
,
,
,
–
=
(
)
×
+
2
For nonsinusoidal output, the power dissipation should be cal-
culated by integrating the on-chip voltage drop multiplied by the
load current over one period.
The user may subtract the quiescent current for the Class AB
output stage when calculating the loaded power dissipation. For
each output stage driving a load, subtract a quiescent power
according to
P
AV
AV
I
D OUTPUT
,
CC
EE
O QUIESCENT
,
–
=
(
)
×
For the AD8113
, I
O, QUIESCENT
=
0.67
mA
.
For each
disabled output, the quiescent power supply current in
AV
CC
and
AV
EE
drops by approximately 1.25
mA, although
there is a power dissipation in the on-chip feedback resistors if
the disabled output is being driven from an external source.
AGND
RF
4k
AV
EE
I
O, QUIESCENT
QPNP
V
OUTPUT
I
OUTPUT
QNPN
AV
CC
I
O, QUIESCENT
Figure 7. Simplified Output Stage
An example:
AD8113, in an ambient temperature of 70
°
C,
with all 16 outputs driving 6 V rms into 600
loads. Power
supplies are
±
12 V.
Step 1. Calculate power dissipation of AD8113 using data sheet
quiescent currents.
P
D, QUIESCENT
= (
AV
CC
×
I
AVCC
) + (
AV
EE
×
I
AVEE
) + (
DV
CC
×
I
DVCC
)
P
D, QUIESCENT
= (12 V
×
54 mA) + (
–
12 V
×
–
54 mA)
+ (5 V
×
13 mA)
Step 2. Calculate power dissipation from loads.
P
D, OUTPUT
= (
AV
CC
–
V
OUTPUT, RMS
)
×
I
OUTPUT, RMS
+
V
OUTPUT2
/
4 k
P
D, OUTPUT
=
(12 V – 6 V)
×
6 V/600
+ (6 V)
2
/4 k
= 69 mW
There are 16 outputs, so
nP
D, OUTPUT
= 16
×
69 mW = 1.1 W
Step 3. Subtract quiescent output current for number of loads
(assumes output voltage >> 0.5 V).
P
DQ, OUTPUT
= (
AV
CC
–
AV
EE
)
×
I
O, QUIESCENT
P
DQ, OUTPUT
= (12 V – (–12 V))
×
0.67 mA = 16 mW
There are 16 outputs, so
nP
D, OUTPUT
= 16
×
16 mW = 0.3 W
Step 4. Verify that power dissipation does not exceed maximum
allowed value.
P
D, ON-CHIP
=
P
D, QUIESCENT
+
nP
D, OUTPUT
– nP
DQ, OUTPUT
P
D, ON-CHIP
= 1.3 W + 1.1 W – 0.3 W = 2.1 W
From the figure or the equation, this power dissipation is below
the maximum allowed dissipation for all ambient temperatures
approaching 70
°
C.
NOTE: It can be shown that for a dual supply of
±
a
, a Class AB
output stage dissipates maximum power into a grounded load
when the output voltage is
a/2
. So for a
±
12 V supply, the
above example demonstrates the worst-case power dissipation
into 600
. It can be seen from this example that the minimum
load resistance for
±
12 V operation is 600
(for full rated oper-
ating temperature range). For larger safety margins, when the out-
put signal is unknown, loads of 1k
and greater are recommended.
When operating with
±
5 V supplies, this load resistance may be
lowered to 150
.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| AD8115AST | Low Cost 225 MHz 16 X 16 Crosspoint Switches |
| AD8114-EB | Low Cost 225 MHz 16 X 16 Crosspoint Switches |
| AD8115-EB | Low Cost 225 MHz 16 X 16 Crosspoint Switches |
| AD8114 | ECONOLINE: REC2.2-S_DRW(Z)/H* - 2.2W DIP Package- 1kVDC Isolation- Regulated Output- 4.5-9V, 9-18V, 18-36V, 36-72V Wide Input Range 2 : 1- UL94V-0 Package Material- Continuous Short Circiut Protection- Cost Effective- 100% Burned In- Efficiency to 84% |
| AD8114AST | Low Cost 225 MHz 16 X 16 Crosspoint Switches |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| AD8113JSTZ | 功能描述:IC VIDEO CROSSPOINT SWIT 100LQFP RoHS:是 類別:集成電路 (IC) >> 接口 - 模擬開關(guān)，多路復(fù)用器，多路分解器 系列:- 特色產(chǎn)品:MicroPak? 標(biāo)準(zhǔn)包裝:1 系列:- 功能:開關(guān) 電路:2 x SPST - NC 導(dǎo)通狀態(tài)電阻:500 毫歐 電壓電源:單電源 電壓 - 電源，單路/雙路(±):1.4 V ~ 4.3 V 電流 - 電源:150nA 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:8-XFDFN 供應(yīng)商設(shè)備封裝:8-XSON，SOT833-1 （1.95x1） 包裝:Digi-Reel® 其它名稱:568-5557-6 |
| AD8114 | 制造商:AD 制造商全稱:Analog Devices 功能描述:Low Cost 225 MHz 16 X 16 Crosspoint Switches |
| AD8114_05 | 制造商:AD 制造商全稱:Analog Devices 功能描述:Low Cost 225 MHz 16 ?? 16 Crosspoint Switches |
| AD8114AST | 制造商:Analog Devices 功能描述:Analog Video Crosspoint 225MHz 16 x 16 100-Pin LQFP 制造商:Rochester Electronics LLC 功能描述:TQFP 300MHZ 16X16 G=+1 CROSSPOINT SWITCH - Tape and Reel 制造商:Analog Devices 功能描述:Multiplexer IC |
| AD8114ASTZ | 功能描述:IC VIDEO CROSSPOINT SWIT 100LQFP RoHS:是 類別:集成電路 (IC) >> 接口 - 模擬開關(guān)，多路復(fù)用器，多路分解器 系列:- 其它有關(guān)文件:STG4159 View All Specifications 標(biāo)準(zhǔn)包裝:5,000 系列:- 功能:開關(guān) 電路:1 x SPDT 導(dǎo)通狀態(tài)電阻:300 毫歐 電壓電源:雙電源 電壓 - 電源，單路/雙路(±):±1.65 V ~ 4.8 V 電流 - 電源:50nA 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:7-WFBGA，F(xiàn)CBGA 供應(yīng)商設(shè)備封裝:7-覆晶 包裝:帶卷 (TR) |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。