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參數資料
| 型號： | AD8012AR-REEL7 |
| 廠商： | ANALOG DEVICES INC |
| 元件分類： | 音頻／視頻放大 |
| 英文描述： | Dual 350 MHz Low Power Amplifier |
| 中文描述： | 1 CHANNEL, VIDEO AMPLIFIER, PDSO8 |
| 封裝： | MS-012AA, SOIC-8 |
| 文件頁數： | 11/15頁 |
| 文件大小： | 414K |
| 代理商： | AD8012AR-REEL7 |
AD8012
–11–
REV. A
THEORY OF OPERATION
The AD8012 is a dual high speed CF amplifier that attains new
levels of bandwidth (BW), power, distortion and signal swing
capability. Its wide dynamic performance (including noise) is
the result of both a new complementary high speed bipolar
process and a new and unique architectural design. The AD8012
basically uses a two gain stage complementary design approach
versus the traditional “single stage” complementary mirror
structure sometimes referred to as the Nelson amplifier. Though
twin stages have been tried before, they typically consumed
high power since they were of a folded cascade design much like
the AD9617. This design allows for the standing or quiescent
current to add to the high signal or slew current-induced stages.
In the time domain, the large signal output rise/fall time and
slew rate is typically controlled by the small signal BW of the
amplifier and the input signal step amplitude respectively, not
the dc quiescent current of the gain stages (with the exception
of input level shift diodes Q1/Q2). Using two stages vs. one
also allows for a higher overall gain bandwidth product (GBWP)
for the same power, thus lower signal distortion and the ability
to drive heavier external loads. In addition, the second gain
stage also isolates (divides down) A3’s input reflected load drive
and the nonlinearities created resulting in relatively lower dis-
tortion and higher open-loop gain.
Overall, when “high” external load drive and low ac distortion
is a requirement, a twin gain stage integrating amplifier like the
AD8012 will provide excellent results for lower power over the
traditional single stage complementary devices. In addition,
being a CF amplifier, closed-loop BW variations versus exter-
nal gain variations (varying RN) will be much lower compared
to a VF op amp, where the BW varies inversely with gain. An-
other key attribute of this amplifier is its ability to run on a
single 5 V supply due in part to its wide common-mode input
and output voltage range capability. For 5 V supply operation,
the device obviously consumes half the quiescent power (vs.
10 V supply) with little degradation in its ac and dc perfor-
mance characteristics. See data sheet comparisons.
DC GAIN CHARACTERISTICS
Gain stages A1/A1B and A2/A2B combined provide negative
feedforward transresistance gain. See Figure 40. Stage A3 is a
unity gain buffer which provides external load isolation to A2.
Each stage uses a symmetrical complementary design. (A3 is
also complementary though not explicitly shown). This is done
to reduce both second order signal distortion and overall quies-
cent power as discussed above. In the quasi dc to low frequency
region, the closed loop gain relationship can be approximated
as:
G
= 1+
R
F
/
R
N
noninverting operation
G
= –
R
F
/
R
N
inverting operation
These basic relationships above are common to all traditional
operational amplifiers.
V
P
Q1
Q2
IPP
IPN
INP
IPN
A1
V
N
–
A1
Z
I
IQ1
Q3
Q4
IE
C
P
1
C
P
1
Z2
A2
C
L
R
N
ICQ
– IO
R
F
V
O
C
D
ICQ + IO
V
O
9
IQ1
AD8012
A2
C
P
2
Z1 = R1 || C1
Z1
C
D
A3
R
L
Z1
–V
I
–V
I
IR
– IFC
IR + IFC
+
Figure 40. Simplified Block Diagram
相關PDF資料 |
PDF描述 |
|---|---|
| AD8012ARM | Dual 350 MHz Low Power Amplifier |
| AD8012ARM-REEL | Dual 350 MHz Low Power Amplifier |
| AD8012ARM-REEL7 | Dual 350 MHz Low Power Amplifier |
| AD8012 | Dual 350 MHz Low Power Amplifier |
| AD8012* | Dual 350 MHz Low Power Amplifier |
相關代理商/技術參數 |
參數描述 |
|---|---|
| AD8012ARZ | 功能描述:IC OPAMP CF DUAL LP 125MA 8SOIC RoHS:是 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 標準包裝:2,500 系列:- 放大器類型:通用 電路數:4 輸出類型:- 轉換速率:0.6 V/µs 增益帶寬積:1MHz -3db帶寬:- 電流 - 輸入偏壓:45nA 電壓 - 輸入偏移:2000µV 電流 - 電源:1.4mA 電流 - 輸出 / 通道:40mA 電壓 - 電源，單路/雙路(±):3 V ~ 32 V，±1.5 V ~ 16 V 工作溫度:0°C ~ 70°C 安裝類型:表面貼裝 封裝/外殼:14-TSSOP（0.173"，4.40mm 寬） 供應商設備封裝:14-TSSOP 包裝:帶卷 (TR) 其它名稱:LM324ADTBR2G-NDLM324ADTBR2GOSTR |
| AD8012ARZ-REEL | 功能描述:IC OPAMP CF DUAL LP 125MA 8SOIC RoHS:是 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 標準包裝:1 系列:- 放大器類型:通用 電路數:4 輸出類型:滿擺幅 轉換速率:0.6 V/µs 增益帶寬積:1MHz -3db帶寬:- 電流 - 輸入偏壓:2pA 電壓 - 輸入偏移:1000µV 電流 - 電源:85µA 電流 - 輸出 / 通道:20mA 電壓 - 電源，單路/雙路(±):1.8 V ~ 6 V 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:14-SOIC（0.154"，3.90mm 寬） 供應商設備封裝:14-SOICN 包裝:剪切帶 (CT) 產品目錄頁面:680 (CN2011-ZH PDF) 其它名稱:MCP6L04T-E/SLCT |
| AD8012ARZ-REEL7 | 功能描述:IC OPAMP CF DUAL LP 125MA 8SOIC RoHS:是 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 其它有關文件:Automotive Product Guide 產品培訓模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 標準包裝:1 系列:- 放大器類型:通用 電路數:1 輸出類型:滿擺幅 轉換速率:3 V/µs 增益帶寬積:10MHz -3db帶寬:- 電流 - 輸入偏壓:1pA 電壓 - 輸入偏移:70µV 電流 - 電源:2.5mA 電流 - 輸出 / 通道:48mA 電壓 - 電源，單路/雙路(±):2.7 V ~ 5.5 V，±1.35 V ~ 2.75 V 工作溫度:-40°C ~ 125°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-6 供應商設備封裝:SOT-6 包裝:Digi-Reel® 其它名稱:MAX4475AUT#TG16DKR |
| AD8013 | 制造商:AD 制造商全稱:Analog Devices 功能描述:Single Supply, Low Power, Triple Video Amplifier |
| AD80135BBCZ | 制造商:Analog Devices 功能描述: |
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