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參數(shù)資料
| 型號： | ADA4853-2YCPZ-RL |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | Low Power, Rail-to-Rail Output, Video Op Amp with Ultralow Power Disable |
| 中文描述： | 1 CHANNEL, VIDEO AMPLIFIER, QCC16 |
| 封裝： | 3 X 3 MM, ROHS COMPLIANT, MO-220VEED-2, LFCSP-16 |
| 文件頁數(shù)： | 14/16頁 |
| 文件大?。?/td> | 436K |
| 代理商： | ADA4853-2YCPZ-RL |
ADA4853-1/ADA4853-2/ADA4853-3
CIRCUIT DESCRIPTION
The ADA4853-1/ADA4853-2/ADA4853-3 feature a high slew
rate input stage that is a true single-supply topology capable of
sensing signals at or below the minus supply rail. The rail-to-
rail output stage can pull within 100 mV of either supply rail
when driving light loads and within 200 mV when driving
150 Ω. High speed performance is maintained at supply
voltages as low as 2.65 V.
HEADROOM CONSIDERATIONS
The ADA4853-1/ADA4853-2/ADA4853-3 are designed for use
in low voltage systems. To obtain optimum performance, it is
useful to understand the behavior of the amplifiers as input and
output signals approach their headroom limits. The amplifiers’
input common-mode voltage range extends from the negative
supply voltage (actually 200 mV below this) to within 1.2 V of
the positive supply voltage.
Exceeding the headroom limits is not a concern for any
inverting gain on any supply voltage, as long as the reference
voltage at the amplifiers’ positive input lies within the
amplifiers’ input common-mode range.
The input stage is the headroom limit for signals approaching
the positive rail. Figure 50 shows a typical offset voltage vs. the
input common-mode voltage for the ADA4853-1/ADA4853-2/
ADA4853-3 on a 5 V supply. Accurate dc performance is
maintained from approximately 200 mV below the negative
supply to within 1.2 V of the positive supply. For high speed
signals, however, there are other considerations. As the
common-mode voltage gets within 1.2 V of positive supply, the
amplifier responds well but the bandwidth begins to drop as the
common-mode voltage approaches the positive supply. This can
manifest itself in increased distortion or settling time. Higher
frequency signals require more headroom than the lower
frequencies to maintain distortion performance.
Rev. B | Page 14 of 16
–0.6
–0.8
–1.0
–1.2
–1.4
–1.6
–1.8
–2.0
–1.0 –0.5
0
0.5
1.0
1.5
V
CM
(V)
2.0
2.5
3.0
3.5
4.0
4.5
V
O
0
V
S
= 5V
Figure 50. V
OS
vs. Common-Mode Voltage, V
S
= 5 V
For signals approaching the negative supply and inverting gain
and high positive gain configurations, the headroom limit is the
output stage. The ADA4853-1/ADA4853-2/ADA4853-3 use a
common-emitter output stage. This output stage maximizes the
available output range, limited by the saturation voltage of the
output transistors. The saturation voltage increases with the
drive current that the output transistor is required to supply due
to the output transistor’s collector resistance.
As the saturation point of the output stage is approached, the
output signal shows increasing amounts of compression and
clipping. As in the input headroom case, higher frequency
signals require a bit more headroom than the lower frequency
signals. Figure 27 illustrates this point by plotting the typical
distortion vs. the output amplitude.
OVERLOAD BEHAVIOR AND RECOVERY
Input
The specified input common-mode voltage of the ADA4853-1/
ADA4853-2/ADA4853-3 is 200 mV below the negative supply
to within 1.2 V of the positive supply. Exceeding the top limit
results in lower bandwidth and increased rise time. Pushing the
input voltage of a unity-gain follower to less than 1.2 V from the
positive supply leads to an increasing amount of output error as
well as increased settling time. The recovery time from input
voltages 1.2 V or closer to the positive supply is approximately
40 ns; this is limited by the settling artifacts caused by
transistors in the input stage coming out of saturation.
The amplifiers do not exhibit phase reversal, even for input
voltages beyond the voltage supply rails. Going more than
0.6 V beyond the power supplies turns on protection diodes
at the input stage, greatly increasing the current draw of the
devices.
相關PDF資料 |
PDF描述 |
|---|---|
| ADA4853-2YCPZ-RL7 | Low Power, Rail-to-Rail Output, Video Op Amp with Ultralow Power Disable |
| ADA4853-3 | Low Power, Rail-to-Rail Output, Video Op Amp with Ultralow Power Disable |
| ADA4853-3YCPZ-R2 | Low Power, Rail-to-Rail Output, Video Op Amp with Ultralow Power Disable |
| ADA4853-3YCPZ-R7 | Low Power, Rail-to-Rail Output, Video Op Amp with Ultralow Power Disable |
| ADA4853-3YCPZ-RL | Low Power, Rail-to-Rail Output, Video Op Amp with Ultralow Power Disable |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| ADA4853-2YCPZ-RL7 | 功能描述:IC OPAMP VIDEO DUAL 16-LFCSP RoHS:是 類別:集成電路 (IC) >> 線性 - 放大器 - 視頻放大器和頻緩沖器 系列:- 標準包裝:1,000 系列:- 應用:驅動器 輸出類型:差分 電路數(shù):3 -3db帶寬:350MHz 轉換速率:1000 V/µs 電流 - 電源:14.5mA 電流 - 輸出 / 通道:60mA 電壓 - 電源，單路/雙路(±):5 V ~ 12 V，±2.5 V ~ 6 V 安裝類型:表面貼裝 封裝/外殼:20-VFQFN 裸露焊盤 供應商設備封裝:20-QFN 裸露焊盤（4x4） 包裝:帶卷 (TR) |
| ADA4853-3 | 制造商:AD 制造商全稱:Analog Devices 功能描述:Low Power, Rail-to-Rail Output, Video Op Amps with Ultralow Power |
| ADA4853-3WYCPZ-R7 | 功能描述:IC OPAMP VIDEO TRIPLE 16LFCSP 制造商:analog devices inc. 系列:- 包裝:帶卷（TR） 零件狀態(tài):在售 應用:電壓反饋 輸出類型:滿擺幅 電路數(shù):3 -3db 帶寬:100MHz 壓擺率:120 V/μs 電流 - 電源:1.4mA 電流 - 輸出/通道:160mA 電壓 - 電源，單/雙（±）:2.65 V ~ 5 V 安裝類型:表面貼裝 封裝/外殼:16-WFQFN 裸露焊盤，CSP 供應商器件封裝:16-LFCSP-WQ（3x3） 標準包裝:1,500 |
| ADA4853-3YCPZ-R2 | 制造商:Analog Devices 功能描述:OP Amp Triple GP R-R O/P 5V 16-Pin LFCSP EP T/R 制造商:Analog Devices 功能描述:OP AMP TRIPLE GP R-R O/P 5V 16LFCSP - Tape and Reel |
| ADA4853-3YCPZ-R7 | 功能描述:IC OPAMP VIDEO TRIPLE 16-LFCSP RoHS:是 類別:集成電路 (IC) >> 線性 - 放大器 - 視頻放大器和頻緩沖器 系列:- 產(chǎn)品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:50 系列:- 應用:TFT-LCD 面板：VCOM 驅動器 輸出類型:滿擺幅 電路數(shù):1 -3db帶寬:35MHz 轉換速率:40 V/µs 電流 - 電源:3.7mA 電流 - 輸出 / 通道:1.3A 電壓 - 電源，單路/雙路(±):9 V ~ 20 V，±4.5 V ~ 10 V 安裝類型:表面貼裝 封裝/外殼:8-TSSOP，8-MSOP（0.118"，3.00mm 寬）裸露焊盤 供應商設備封裝:8-uMax-EP 包裝:管件 |
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