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| 型号： | AD8051 |
| 厂商： | Analog Devices, Inc. |
| 英文描述： | Low Cost, High Speed Rail-to-Rail Amplifiers |
| 中文描述： | 低成本，高速轨到轨放大器 |
| 文件页数： | 12/16页 |
| 文件大小： | 267K |
| 代理商： | AD8051 |
AD8051/AD8052/AD8054
–12–
REV. B
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 36, the AD8051/AD8052/
AD8054 recovers within 60ns from negative overdrive and
within 45ns from positive overdrive.
Figure 36.Overdrive Recovery
Driving Capacitive Loads
Consider the AD8051/AD8052 in a closed-loop gain of +1 with
+V
S
= 5 V and a load of 2 k
in parallel with 50 pF. Figures 37
and 38 show its frequency and time domain responses, respec-
tively, to a small-signal excitation. The capacitive load drive of
the AD8051/AD8052/AD8054 can be increased by adding a
low valued resistor in series with the load. Figures 39 and 40
show the effect of a series resistor on capacitive drive for varying
voltage gains. As the closed-loop gain is increased, the larger
phase margin allows for larger capacitive loads with less peak-
ing. Adding a series resistor with lower closed-loop gains ac-
complishes the same effect. For large capacitive loads, the
frequency response of the amplifier will be dominated by the
roll-off of the series resistor and the load capacitance.
FREQUENCY – MHz
500
0.1
1
10
100
V
= +5V
G = +1
R
L
= 2k
V
C
L
= 50pF
V
O
= 200mV p-p
8
6
4
2
0
2
2
2
4
2
6
2
8
2
10
G
Figure 37. AD8051/AD8052 Closed-Loop Frequency
Response: C
L
= 50 pF
2.60
2.55
2.50
2.45
2.40
Figure 38. AD8051/AD8052 200 mV Step Response:
C
L
= 50 pF
V
S
= +5V
30%
OVERSHOOT
R
S
= 3
V
R
S
= 0
V
R
G
R
F
C
L
R
S
V
OUT
V
100mV STEP
50
V
10000
1000
11
6
2
C
2
P
F
3
4
5
100
10
A
CL
– V/V
Figure 39. AD8051/AD8052 Capacitive Load Drive vs.
Closed-Loop Gain
V
S
= +5V
#
30%
OVERSHOOT
R
G
R
F
C
L
R
S
V
OUT
V
100mV STEP
50
V
R
S
= 10
V
R
S
= 0
V
A
CL
– V/V
1000
100
10
1
6
2
3
4
5
C
Figure 40. AD8054 Capacitive Load Drive vs. Closed-Loop
Gain
Circuit Description
The AD8051/AD8052/AD8054 is fabricated on Analog Devices’
proprietary eXtra-Fast Complementary Bipolar (XFCB) pro-
cess, which enables the construction of PNP and NPN transis-
tors with similar f
T
s in the 2 GHz–4 GHz region. The process is
dielectrically isolated to eliminate the parasitic and latch-up
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相关代理商/技术参数 |
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|---|---|
| AD8051_06 | 制造商:AD 制造商全称:Analog Devices 功能描述:Low Cost, High Speed, Rail-to-Rail Amplifiers |
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| AD8051AR | 功能描述:IC OPAMP VF R-R LDIST LP 8SOIC RoHS:否 类别:集成电路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 标准包装:1,000 系列:- 放大器类型:电压反馈 电路数:4 输出类型:满摆幅 转换速率:33 V/µs 增益带宽积:20MHz -3db带宽:30MHz 电流 - 输入偏压:2nA 电压 - 输入偏移:3000µV 电流 - 电源:2.5mA 电流 - 输出 / 通道:30mA 电压 - 电源，单路/双路(±):4.5 V ~ 16.5 V，±2.25 V ~ 8.25 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:14-SOIC（0.154"，3.90mm 宽） 供应商设备封装:14-SOIC 包装:带卷 (TR) |
| AD8051AR-EBZ | 功能描述:BOARD EVAL FOR AD8051AR RoHS:是 类别:编程器，开发系统 >> 评估板 - 运算放大器 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:1 系列:- |
| AD8051AR-REEL | 制造商:Analog Devices 功能描述:OP Amp Single Volt Fdbk R-R O/P ±6V/12V 8-Pin SOIC N T/R 制造商:Rochester Electronics LLC 功能描述:SOIC SINGLE 200MHZ L/C RAIL-TO-RAIL AMP - Tape and Reel |
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