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PDF ( 数据手册 , 数据表 ) AD8054

零件编号 AD8054
描述 Rail-to-Rail Amplifiers
制造商 Analog Devices
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AD8054 数据手册, 描述, 功能
FEATURES
High speed and fast settling on 5 V
110 MHz, −3 dB bandwidth (G = +1) (AD8051/AD8052)
150 MHz, −3 dB bandwidth (G = +1) (AD8054)
145 V/μs slew rate
50 ns settling time to 0.1%
Single-supply operation
Output swings to within 25 mV of either rail
Input voltage range: −0.2 V to +4 V; VS = 5 V
Video specifications (G = +2)
0.1 dB gain flatness: 20 MHz; RL = 150 Ω
Differential gain/phase: 0.03%/0.03°
Low distortion
−80 dBc total harmonic @ 1 MHz, RL = 100 Ω
Outstanding load drive capability
Drives 45 mA, 0.5 V from supply rails (AD8051/AD8052)
Drives 50 pF capacitive load (G = +1) (AD8051/AD8052)
Low power: 2.75 mA/amplifier (AD8054)
Low power: 4.4 mA/amplifier (AD8051/AD8052)
APPLICATIONS
Active filters
Analog-to-digital drivers
Clock buffer
Consumer video
Professional cameras
CCD imaging systems
CD/DVD ROMs
GENERAL DESCRIPTION
The AD8051 (single), AD8052 (dual), and AD8054 (quad) are
low cost, high speed, voltage feedback amplifiers. The amplifiers
operate on +3 V, +5 V, or ±5 V supplies at low supply current.
They have true single-supply capability with an input voltage
range extending 200 mV below the negative rail and within 1 V
of the positive rail.
Despite their low cost, the AD8051/AD8052/AD8054 provide
excellent overall performance and versatility. The output voltage
swings to within 25 mV of each rail, providing maximum output
dynamic range with excellent overdrive recovery.
Rev. J
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
Low Cost, High Speed,
Rail-to-Rail Amplifiers
AD8051/AD8052/AD8054
PIN CONNECTIONS (TOP VIEWS)
NC 1
–IN 2
+IN 3
–VS 4
AD8051
8 NC
7 +VS
6 VOUT
5 NC
NC = NO CONNECT
Figure 1. SOIC-8 (R)
AD8051
VOUT 1
5 +VS
–VS 2
+–
+IN 3
4 –IN
Figure 2. SOT-23-5 (RJ)
OUT1 1
–IN1 2
+IN1 3
–VS 4
AD8052
+
+
8 +VS
7 OUT
6 –IN2
5 +IN2
OUT A 1
–IN A 2
+IN A 3
V+ 4
+IN B 5
–IN B 6
OUT B 7
AD8054
14 OUT D
13 –IN D
12 +IN D
11 V–
10 +IN C
9 –IN C
8 OUT C
Figure 3. SOIC (R-8) and MSOP (RM-8) Figure 4. SOIC (R-14) and TSSOP (RU-14)
5.0
4.5 VS = 5V
4.0 G = –1
RF = 2k
3.5 RL = 2k
3.0
2.5
2.0
1.5
1.0
0.5
0
0.1 1 10 50
FREQUENCY (MHz)
Figure 5. Low Distortion Rail-to-Rail Output Swing
The AD8051/AD8052/AD8054 are well suited for video
electronics, cameras, video switchers, or any high speed portable
equipment. Low distortion and fast settling make them ideal for
active filter applications.
The AD8051/AD8052 in the 8-lead SOIC, the AD8052 in the
MSOP, the AD8054 in the 14-lead SOIC, and the 14-lead TSSOP
packages are available in the extended temperature range of
−40°C to +125°C.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113
©2009 Analog Devices, Inc. All rights reserved.







AD8054 pdf, 数据表
AD8051/AD8052/AD8054
Parameter
POWER SUPPLY
Operating Range
Quiescent Current/Amplifier
Power Supply Rejection Ratio
OPERATING TEMPERATURE RANGE
Conditions
ΔVS = ±1
RJ-5
RM-8, R-8, RU-14, R-14
AD8051A/AD8052A
AD8054A
Min Typ Max Min Typ Max Unit
3
4.8
68 80
−40
−40
12
5.5
+85
+125
3
68
−40
2.875
80
12
3.4
+125
V
mA
dB
°C
°C
Rev. J | Page 8 of 24







AD8054 equivalent, schematic
AD8051/AD8052/AD8054
THEORY OF OPERATION
CIRCUIT DESCRIPTION
The AD8051/AD8052/AD8054 are fabricated on the Analog
Devices, Inc. proprietary eXtra-Fast Complementary Bipolar
(XFCB) process, which enables the construction of PNP and
NPN transistors with similar fTs in the 2 GHz to 4 GHz region.
The process is dielectrically isolated to eliminate the parasitic
and latch-up problems caused by junction isolation. These
features allow the construction 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 40). The smaller signal swings required on the first stage
outputs (nodes SIP, SIN) reduce the effect of nonlinear currents
due to junction capacitances and improve the distortion per-
formance. This design achieves harmonic distortion of −80 dBc
@ 1 MHz into 100 Ω with VOUT = 2 V p-p (gain = +1) on a
single 5 V supply.
The inputs of the device can handle voltages from −0.2 V below
the negative rail to within 1 V of the positive rail. Exceeding
these values do not cause phase reversal; however, the input
ESD devices begin to conduct if the input voltages exceed the
rails by greater than 0.5 V. During this overdrive condition, the
output stays at the rail.
The rail-to-rail output range of the AD8051/AD8052/AD8054
is provided by a complementary common emitter output stage.
High output drive capability is provided by injecting all output
stage predriver currents directly into the bases of the output
devices Q8 and Q36. Biasing of Q8 and Q36 is accomplished by
I8 and I5, along with a common-mode feedback loop (not
shown). This circuit topology allows the AD8051/AD8052 to
drive 45 mA of output current and allows the AD8054 to drive
30 mA of output current with the outputs within 0.5 V of the
supply rails.
VCC
VINP
VINN
R26
I10 R39 I2
Q25
I3
Q50 I9
Q36
Q4 Q5
Q51 Q39
I5
R15 R2
Q13 Q1
Q40
VEE
Q23
Q22 R23 R27
Q7 Q31
Q21 Q27
VEE
C3
VOUT
SIP SIN
C9
Q2 Q11
Q3
C7
VEE
R5 R21 R3
Q24
I7
Q47 I11
Q8
I8
VCC
Figure 40. AD8051/AD8052 Simplified Schematic
Rev. J | Page 16 of 24










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