- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄385556 > MAX9516 (Maxim Integrated Products, Inc.) 1.8V, Ultra-Low-Power, DirectDrive Video Filter Amplifier with Load Detect PDF資料下載
參數(shù)資料
| 型號： | MAX9516 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | 1.8V, Ultra-Low-Power, DirectDrive Video Filter Amplifier with Load Detect |
| 中文描述： | 1.8V、超低功耗、DirectDrive視頻濾波放大器，提供負(fù)載檢測 |
| 文件頁數(shù)： | 9/15頁 |
| 文件大?。?/td> | 320K |
| 代理商： | MAX9516 |
M
1.8V, Ultra-Low-Power, DirectDrive
Video Filter Amplifier with Load Detect
_______________________________________________________________________________________
9
pled input, the sync-tip clamp automatically clamps the
input signal to ground, preventing it from going lower. A
small current of 2μA pulls down on the input to prevent
an AC-coupled signal from drifting outside the input
range of the part.
Using an AC-coupled input will result in some addition-
al variation of the black level at the output. Applying a
voltage above ground to the input pin of the device
always produces the same output voltage, regardless
of whether the input is DC- or AC-coupled. However,
since the sync-tip clamp level (V
CLP
) can vary over a
small range, the video black level at the output of the
device when using an AC-coupled input can vary by an
additional amount equal to the V
CLP
multiplied by the
DC voltage gain (A
V
).
Short-Circuit Protection
In Figure 7, the MAX9516 includes a 75
back-termina-
tion resistor that limits short-circuit current if an external
short is applied to the video output. The MAX9516 also
features internal output short-circuit protection to prevent
device damage in prototyping and applications where
the amplifier output can be directly shorted.
Shutdown
The MAX9516 features a low-power shutdown mode for
battery-powered/portable applications. Shutdown
reduces the quiescent current to less than 10nA.
Connecting
SHDN
to ground (GND) disables the output
and places the MAX9516 into a low-power shutdown
mode. In shutdown mode, the sync-tip clamp, filter,
amplifier, charge pump, and linear regulator are turned
off and the video output is high impedance.
Applications Information
Power Consumption
The quiescent power consumption and average power
consumption of the MAX9516 is remarkably low
because of the 1.8V operation and the DirectDrive
technology. Quiescent power consumption (P
Q
) is the
power consumed by the internal circuitry of the
MAX9516. The formula for calculating PQ is below.
P
Q
= P
TOTAL
- P
LOAD
P
TOTAL
is the total power drawn from the supply volt-
age, and P
LOAD
is the power consumed by the load
attached to OUT. For the MAX9516, the quiescent
power consumption is typically 6mW.
Average power consumption, which is representative of
the power consumed in a real application, is the total
power drawn from the supply voltage for a MAX9516
driving a 150
load to ground with a 50% flat field.
Under such conditions, the average power consumption
for the MAX9516 is 12mW. Table 1 shows the power
consumption with different video signals. The supply
voltage is 1.8V. OUT drives a 150
load to ground.
Notice that the two extremes in power consumption
occur with a video signal that is all black and a video
signal that is all white. The power consumption with
75% color bars and a 50% flat field lies in between the
extremes.
Interfacing to Video DACs that Produce
Video Signals Larger than 0.25V
P-P
Devices designed to generate 1V
P-P
video signals at
the output of the video DAC can still work with the
MAX9516. Most video DACs source current into a
ground-referenced resistor, which converts the current
into a voltage. Figure 3 shows a video DAC that creates
a video signal from 0 to 1V across a 150
resistor. The
following video filter amplifier has a gain of 2V/V so that
the output is 2V
P-P
.
The MAX9516 expects input signals that are 0.25V
P-P
nominally. The same video DAC can be made to work
with the MAX9516 by scaling down the 150
resistor to
a 37.5
resistor, as shown in Figure 4. The 37.5
resis-
tor is one-quarter of the 150
resistor, resulting in a
video signal that is one-quarter the amplitude.
VIDEO SIGNAL
MAX9516 POWER
CONSUMPTION (mW)
All Black Screen
All White Screen
75% Color Bars
50% Flat Field
6.7
18.2
11.6
11.7
150
0 TO 1V
LPF
DAC
IMAGE
PROCESSOR
ASIC
75
2V/V
Figure 3. Video DAC generates a 1VP-Psignal across a 150
resistor connected to ground.
Table 1. Power Consumption of MAX9516
with Different Video Signals
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MAX951 | Ultra-Low-Power, Single-Supply Op Amp + Comparator + Reference(超低功耗、單電源運放+比較器+基準(zhǔn)) |
| MAX952 | Ultra-Low-Power, Single-Supply Op Amp + Comparator + Reference(超低功耗、單電源運放+比較器+基準(zhǔn)) |
| MAX953 | Ultra-Low-Power, Single-Supply Op Amp + Comparator + Reference(超低功耗、單電源運放+比較器+基準(zhǔn)) |
| MAX954 | Ultra-Low-Power, Single-Supply Op Amp + Comparator + Reference(超低功耗、單電源運放+比較器+基準(zhǔn)) |
| MAX9539 | Graphics Video Sync Adder/Extractor |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX9516ALB+ | 制造商:Maxim Integrated Products 功能描述:1.8V, ULTRA-LOW-POWER, DIRECTDRIVE VIDEO FILTER AMPLIFIER - Bulk |
| MAX9516ALB+T | 功能描述:視頻放大器 1.8V DirectDrive Video Filter Amp RoHS:否 制造商:ON Semiconductor 通道數(shù)量:4 電源類型: 工作電源電壓:3.3 V, 5 V 電源電流: 最小工作溫度: 最大工作溫度: 封裝 / 箱體:TSSOP-14 封裝:Reel |
| MAX9516EVKIT+ | 功能描述:放大器 IC 開發(fā)工具 MAX9516 Eval Kit RoHS:否 制造商:International Rectifier 產(chǎn)品:Demonstration Boards 類型:Power Amplifiers 工具用于評估:IR4302 工作電源電壓:13 V to 23 V |
| MAX9517ATC+ | 功能描述:視頻放大器 Standard-Definition Video Filter Amp RoHS:否 制造商:ON Semiconductor 通道數(shù)量:4 電源類型: 工作電源電壓:3.3 V, 5 V 電源電流: 最小工作溫度: 最大工作溫度: 封裝 / 箱體:TSSOP-14 封裝:Reel |
| MAX9517ATC+T | 功能描述:視頻放大器 Standard-Definition Video Filter Amp RoHS:否 制造商:ON Semiconductor 通道數(shù)量:4 電源類型: 工作電源電壓:3.3 V, 5 V 電源電流: 最小工作溫度: 最大工作溫度: 封裝 / 箱體:TSSOP-14 封裝:Reel |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。