- 您現在的位置：買賣IC網 > PDF目錄373931 > AD8044 (Analog Devices, Inc.) Quad 150 MHz Rail-to-Rail Amplifier PDF資料下載
參數資料
| 型號： | AD8044 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | Quad 150 MHz Rail-to-Rail Amplifier |
| 中文描述： | 四路150 MHz的軌到軌放大器 |
| 文件頁數： | 11/14頁 |
| 文件大小： | 199K |
| 代理商： | AD8044 |
AD8044
REV. A
–11–
Overdrive Recovery
Overdrive of an amplifier occurs when the output and/or input
range are exceeded. The amplifier must recover from this over-
drive condition. As shown in Figure 33, the AD8044 recovers
within 50 ns from negative overdrive and within 25 ns from
positive overdrive.
50ns
1V
V
S
= +5V
A
V
= +2
R
F
= 2k
V
R
L
= 2k
V
V
2V/DIV
V
1V/DIV
2V
Figure 33. Overdrive Recovery, VS + 5 V, V
IN
= 4 V Step
Circuit Description
The AD8044 is fabricated on Analog Devices’ proprietary
eXtra-Fast Complementary Bipolar (XFCB) process which
enables the construction of PNP and NPN transistors with
similar f
T
s in the 2 GHz–4 GHz region. The process is dielectri-
cally isolated to eliminate the parasitic and latch-up problems
caused by junction isolation. These features allow the construc-
tion of high frequency, low distortion amplifiers with low supply
currents. This design uses a differential output input stage to
maximize bandwidth and headroom (see Figure 34). The
smaller signal swings required on the first stage outputs (nodes
S1P, S1N) reduce the effect of nonlinear currents due to
junction capacitances and improve the distortion performance.
With this design harmonic distortion of better than –85 dB
@ 1 MHz into 100
with V
OUT
= 2 V p-p (Gain = +2) on a
single 5 volt supply is achieved.
The AD8044’s rail to rail output range is provided by a comple-
mentary common-emitter output stage. High output drive capa-
bility is provided by injecting all output stage predriver currents
directly into the bases of the output devices Q8 and Q36. Bias-
ing of Q8 and Q36 is accomplished by I8 and I5, along with a
common-mode feedback loop (not shown). This circuit topol-
ogy allows the AD8044 to drive 50 mA of output current with
the outputs within 0.5 V of the supply rails.
On the input side, the device can handle voltages from –0.2 V
below the negative rail to within 1.2 V of the positive rail. Ex-
ceeding these values will not cause phase reversal; however, the
input ESD devices will begin to conduct if the input voltages
exceed the rails by greater than 0.5 V.
Driving Capacitance Loads
The capacitive load drive of the AD8044 can be increased by
adding a low valued resistor in series with the load. Figure 35
shows the effects of a series resistor on capacitive drive for vary-
ing voltage gains. As the closed-loop gain is increased, the larger
phase margin allows for larger capacitive loads with less over-
shoot. Adding a series resistor with lower closed-loop gains
accomplishes this same effect. For large capacitive loads, the
frequency response of the amplifier will be dominated by the
roll-off of the series resistor and capacitive load.
SIN
R21
R3
V
EE
Q11
Q3
I10
R26
R39
Q5
Q4
Q40
I7
R2
R15
Q13
Q17
R5
C7
Q2
SIP
Q22
Q7
Q21
Q24
R23 R27
I2
I3
I1
Q51
Q25
Q50
Q39
Q47
Q27
Q31
Q23
I9
I5
V
EE
V
CC
I8
Q36
Q8
V
OUT
C3
C9
V
CC
V
IN
P
V
IN
N
V
EE
I11
Figure 34. AD8044 Simplified Schematic
相關PDF資料 |
PDF描述 |
|---|---|
| AD8044AN | Quad 150 MHz Rail-to-Rail Amplifier |
| AD8044AR-14 | Quad 150 MHz Rail-to-Rail Amplifier |
| AD8044AR-14-REEL | VARISTOR 14VRMS 14MM RADIAL |
| AD8044AR-14-REEL7 | VARISTOR 150V RMS 14MM RADIAL |
| AD8045 | 3 nV/Hz Ultralow Distortion, High Speed Op Amp |
相關代理商/技術參數 |
參數描述 |
|---|---|
| AD8044_04 | 制造商:AD 制造商全稱:Analog Devices 功能描述:Quad 150 MHz Rail-to-Rail Amplifier |
| AD8044AN | 制造商:Analog Devices 功能描述:OP Amp Quad Volt Fdbk R-R O/P ±6V/12V 14-Pin PDIP 制造商:Rochester Electronics LLC 功能描述:QUAD 180MHZ R-TO-R V-FDBK - Bulk 制造商:Analog Devices 功能描述:SEMICONDUCTORSLINEAR |
| AD8044ANZ | 功能描述:IC OPAMP VF R-R QUAD LP 14DIP 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 |
| AD8044AR | 制造商:AD 制造商全稱:Analog Devices 功能描述:Quad 150 MHz Rail-to-Rail Amplifier |
| AD8044AR14 | 制造商:Analog Devices 功能描述: |
發布緊急采購，3分鐘左右您將得到回復。