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參數(shù)資料
| 型號： | ISL59830A |
| 廠商： | Intersil Corporation |
| 英文描述： | True Single Supply Video Driver With Power Down |
| 中文描述： | 真正的單電源視頻驅(qū)動器，帶有斷電 |
| 文件頁數(shù)： | 11/15頁 |
| 文件大小： | 396K |
| 代理商： | ISL59830A |
11
FN6233.3
September 26, 2006
Description of Operation and Application
Information
Theory Of Operation
The ISL59830A is a highly practical and robust marriage of
three high bandwidth, high speed, low power, rail-to-rail
voltage feedback amplifiers with a charge pump, to provide a
negative rail without an additional power supply. Designed to
operate with a single supply voltage range of from 0V to
3.3V, the ISL59830A eliminates the need for a split supply
with the incorporation of a charge pump capable of
generating a bottom rail as much as 1.6V below ground; for
a 4.9V range on a single 3.3V supply. This performance is
ideal for NTSC video with its negative-going sync pulses.
The Amplifier
The ISL59830A fabricated on a dielectrically isolated high
speed 5V Bi-CMOS process with 4GHz PNPs and NPN
transistor exceeding 20GHz - perfect for low distortion, low
power demand and high frequency circuits. While the
ISL59830A utilizes somewhat standard voltage mode
feedback topologies, there are many non-standard analog
features providing its outstanding bandwidth, rail-to-rail
operation, and output drive capabilities. The input signal
initially passes through a folded cascode, a topology
providing enhanced frequency response essentially by fixing
the base collector voltage at the junction of the input and
gain stage. The collector of each input device looks directly
into an emitter that is tied closely to ground through a
resistor and biased with a very stable DC source. Since the
voltage of this collector is "locked stable" the effective
bandwidth limiting of the Miller capacitance is greatly
reduced. The signal is then passed through a second fully-
realized differential gain stage and finally through a
proprietary common emitter output stage for improved rail-
to-rail output performance. The result is a highly-stable, low
distortion, low power, and high frequency amplifier capable
of driving moderately capacitive loads with near rail-to-rail
performance.
Input Output Range
The three amplifier channels have an input common mode
voltage range from 0.15V below the bottom rail to within
100mV of the positive supply, V
S
+ pin (Note: bottom rail is
established by the charge pump at negative one half the
positive supply). As the input signal moves outside the
specified range, the output signal will exhibit increasingly
higher levels of harmonic distortion. And of course, as load
resistance becomes lower, the current drive capability of the
device will be challenged and its ability to drive close to each
rail is reduced. For instance, with a load resistance of 1k
the output swing is within 100mV of the rails, while a load
resistance of 150
limits the output swing to within around
300mV of the rails.
Amplifier Output Impedance
To achieve near rail-to-rail performance, the output stage of
the ISL59830A uses transistors in the common emitter
configuration, typically producing higher output impedance
than the standard emitter follower output stage. The
exceptionally high open loop gain of the ISL59830A and
local feedback reduces output impedance to less than 2
at
low frequency. However, since output impedance of the
device is exponentially modulated by the magnitude of the
open loop gain, output impedance increases with frequency
as the open loop gain decreases with frequency. This
inductive-like effect of the output impedance is countered in
the ISL59830A with proprietary output stage topology,
keeping the output impedance low over a wide frequency
range and making it possible to easily and effectively drive
relatively heavy capacitive loads (See Figure 10).
I
N
+
I
N
-
BIAS
OUT
FIGURE 27.
ISL59830A
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
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| ISL59830AIAZ | 功能描述:IC VIDEO DRIVER TRUE SGL 16-QSOP 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(yīng)用:TFT-LCD 面板：VCOM 驅(qū)動器 輸出類型:滿擺幅 電路數(shù):1 -3db帶寬:35MHz 轉(zhuǎn)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(yīng)商設(shè)備封裝:8-uMax-EP 包裝:管件 |
| ISL59830AIAZ-T7 | 功能描述:IC VIDEO DRIVER TRUE SGL 16-QSOP 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(yīng)用:驅(qū)動器 輸出類型:差分 電路數(shù):3 -3db帶寬:350MHz 轉(zhuǎn)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(yīng)商設(shè)備封裝:20-QFN 裸露焊盤（4x4） 包裝:帶卷 (TR) |
| ISL59830IA | 功能描述:IC DRIVER VIDEO SGL 3.3V 16-QSOP RoHS:否 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(yīng)用:驅(qū)動器 輸出類型:差分 電路數(shù):3 -3db帶寬:350MHz 轉(zhuǎn)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(yīng)商設(shè)備封裝:20-QFN 裸露焊盤（4x4） 包裝:帶卷 (TR) |
| ISL59830IA-EVAL | 制造商:Intersil Corporation 功能描述:TRUE SGL SUPPLY VID DRVR - Bulk |
| ISL59830IA-T13 | 功能描述:IC VID DRIVER TRUE SGL 16-QSOP RoHS:否 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(yīng)用:TFT-LCD 面板：VCOM 驅(qū)動器 輸出類型:滿擺幅 電路數(shù):1 -3db帶寬:35MHz 轉(zhuǎn)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(yīng)商設(shè)備封裝:8-uMax-EP 包裝:管件 |
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