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ADA4851-1 Schematic ( PDF Datasheet ) - Analog Devices

Teilenummer ADA4851-1
Beschreibung (ADA4851-x) Rail-to-Rail Output Op Amps
Hersteller Analog Devices
Logo Analog Devices Logo 




Gesamt 24 Seiten
ADA4851-1 Datasheet, Funktion
Low Cost, High Speed, Rail-to-Rail,
Output Op Amps
ADA4851-1/ADA4851-2/ADA4851-4
FEATURES
Qualified for automotive applications
High speed
130 MHz, −3 dB bandwidth
375 V/μs slew rate
55 ns settling time to 0.1%
Excellent video specifications
0.1 dB flatness: 11 MHz
Differential gain: 0.08%
Differential phase: 0.09°
Fully specified at +3 V, +5 V, and ±5 V supplies
Rail-to-rail output
Output swings to within 60 mV of either rail
Low voltage offset: 0.6 mV
Wide supply range: 2.7 V to 12 V
Low power: 2.5 mA per amplifier
Power-down mode
Available in space-saving packages
6-lead SOT-23, 8-lead MSOP, and 14-lead TSSOP
APPLICATIONS
Automotive infotainment systems
Automotive driver assistance systems
Consumer video
Professional video
Video switchers
Active filters
Clock buffers
GENERAL DESCRIPTION
The ADA4851-1 (single), ADA4851-2 (dual), and ADA4851-4
(quad) are low cost, high speed, voltage feedback rail-to-rail
output op amps. Despite their low price, these parts provide
excellent overall performance and versatility. The 130 MHz,
−3 dB bandwidth and high slew rate make these amplifiers well
suited for many general-purpose, high speed applications.
The ADA4851 family is designed to operate at supply voltages
as low as +3 V and up to ±5 V. These parts provide true single-
supply capability, allowing input signals to extend 200 mV
below the negative rail and to within 2.2 V of the positive rail.
On the output, the amplifiers can swing within 60 mV of either
supply rail.
With their combination of low price, excellent differential gain
(0.08%), differential phase (0.09º), and 0.1 dB flatness out to
11 MHz, these amplifiers are ideal for consumer video applications.
The ADA4851-1W, ADA4851-2W, and ADA4851-4W are
automotive grade versions, qualified for automotive applications.
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.
PIN CONFIGURATIONS
VOUT 1 ADA4851-1 6 +VS
–VS 2
5 POWER DOWN
+IN 3
4 –IN
TOP VIEW (Not to Scale)
Figure 1. ADA4851-1, 6-Lead SOT-23 (RJ-6)
ADA4851-2
OUT1 1
–IN1 2
+IN1 3
–VS 4
8 +VS
7 OUT
6 –IN2
5 +IN2
TOP VIEW
(Not to Scale)
Figure 2. ADA4851-2, 8-Lead MSOP (RM-8)
VOUT 1 1
–IN 1 2
+IN 1 3
+VS 4
+IN 2 5
–IN 2 6
VOUT 2 7
ADA4851-4
TOP VIEW
(Not to Scale)
14 VOUT 4
13 –IN 4
12 +IN 4
11 –VS
10 +IN 3
9 –IN 3
8 VOUT 3
Figure 3. ADA4851-4, 14-Lead TSSOP (RU-14)
See the Automotive Products section for more details. The
ADA4851 family is designed to work over the extended
temperature range (−40°C to +125°C).
4
G = +1
3 VS = 5V
RL = 1kΩ
2 CL = 5pF
1
0
–1
–2
–3
–4
–5
–6
1
10 100 1k
FREQUENCY (MHz)
Figure 4. Small-Signal Frequency Response
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 ©2004–2010 Analog Devices, Inc. All rights reserved.






ADA4851-1 Datasheet, Funktion
ADA4851-1/ADA4851-2/ADA4851-4
SPECIFICATIONS WITH +5 V SUPPLY
TA = 25°C, RF = 0 Ω for G = +1, RF = 1 kΩ for G > +1, RL = 1 kΩ, unless otherwise noted.
Table 2.
Parameter
DYNAMIC PERFORMANCE
−3 dB Bandwidth
Bandwidth for 0.1 dB Flatness
Slew Rate
Settling Time to 0.1%
NOISE/DISTORTION PERFORMANCE
Harmonic Distortion, HD2/HD3
Input Voltage Noise
Input Current Noise
Differential Gain
Differential Phase
Crosstalk (RTI)—ADA4851-2/ADA4851-4
DC PERFORMANCE
Input Offset Voltage
Input Offset Voltage Drift
Input Bias Current
Input Bias Current Drift
Input Bias Offset Current
Open-Loop Gain
INPUT CHARACTERISTICS
Input Resistance
Input Capacitance
Input Common-Mode Voltage Range
Input Overdrive Recovery Time (Rise/Fall)
Common-Mode Rejection Ratio
POWER-DOWN—ADA4851-1 ONLY
Power-Down Input Voltage
Turn-Off Time
Turn-On Time
Power-Down Bias Current
Enabled
Power-Down
Conditions
Min
G = +1, VOUT = 0.1 V p-p
ADA4851-1W/2W/4W only: TMIN to TMAX
G = +1, VOUT = 0.5 V p-p
ADA4851-1W/2W/4W only: TMIN to TMAX
G = +2, VOUT = 1.4 V p-p, RL = 150 Ω
G = +2, VOUT = 1.4 V p-p, RL = 150 Ω
G = +2, VOUT = 2 V step
G = +2, VOUT = 2 V step, RL = 150 Ω
96
90
72
64
fC = 1 MHz, VOUT = 2 V p-p, G = +1
f = 100 kHz
f = 100 kHz
G = +2, NTSC, RL = 150 Ω, VOUT = 2 V p-p
G = +2, NTSC, RL = 150 Ω, VOUT = 2 V p-p
f = 5 MHz, G = +2, VOUT = 2.0 V p-p
ADA4851-1W/2W/4W only: TMIN to TMAX
ADA4851-1W/2W/4W only: TMIN to TMAX
VOUT = 1 V to 4 V
ADA4851-1W/2W/4W only: TMIN to TMAX
97
90
Differential/common-mode
VIN = +5.5 V, −0.5 V, G = +1
VCM = 0 V to 2 V
ADA4851-1W/2W/4W only: TMIN to TMAX
−86
−80
Power-down
Power-up
POWER DOWN = 5 V
ADA4851-1W only: TMIN to TMAX
POWER DOWN = 0 V
ADA4851-1W only: TMIN to TMAX
Typ Max Unit
125 MHz
MHz
96 MHz
MHz
35 MHz
11 MHz
200 V/μs
55 ns
−80/−100
10
2.5
0.08
0.11
−70/−60
dBc
nV/√Hz
pA/√Hz
%
Degrees
dB
0.6 3.4 mV
7.4 mV
4 μV/°C
2.2 3.9 μA
4.9 μA
6 nA/°C
20 nA
107 dB
dB
0.5/5.0
1.2
−0.2 to +2.8
50/45
−105
pF
V
ns
dB
dB
<1.1 V
>1.6 V
0.7 μs
50 ns
33 40 μA
40 μA
−22 −30 μA
−30 μA
Rev. J | Page 6 of 24

6 Page









ADA4851-1 pdf, datenblatt
ADA4851-1/ADA4851-2/ADA4851-4
6.2
VS = ±5V
G = +2
6.1 RL = 150Ω
RF = 1kΩ
6.0
5.9 VOUT = 100mV p-p
5.8 VOUT = 1V p-p
5.7 VOUT = 2V p-p
5.6
5.5
5.4
0.1 1 10 100
FREQUENCY (MHz)
Figure 12. 0.1 dB Flatness Response for Various Output Amplitudes
1
VGS==+±15V
0 VOUT = 1V p-p
–1
RL = 1kΩ
–2
RL = 150Ω
–3
–4
–5
–6
1 10 100 300
FREQUENCY (MHz)
Figure 13. Large Frequency Response for Various Loads
140 0
VS = ±5V
120 –30
100 –60
PHASE
80 –90
60 –120
40 –150
GAIN
20 –180
0 –210
–20 –240
10 100 1k 10k 100k 1M 10M 100M 1G
FREQUENCY (Hz)
Figure 14. Open-Loop Gain and Phase vs. Frequency
–40
G = –1
–50
VS = 3V
RL = 150
VOUT = 2V
–60
HD2
–70
–80
HD3
–90
–100
–110
0.1
1
FREQUENCY (MHz)
Figure 15. Harmonic Distortion vs. Frequency
10
–50
G = +2
–60
VS = ±5V
RL = 1kΩ
f = 2MHz
–70
HD2
–80
HD3
–90
–100
–110
–120
0 1 2 3 4 5 6 7 8 9 10
OUTPUT AMPLITUDE (V p-p)
Figure 16. Harmonic Distortion vs. Output Amplitude
–40
G = +1
–50
VOUT = 2V p-p
VS = ±5V
–60
–70
RL = 1kHD2
–80 RL = 150HD2
–90
–100
RL = 150HD3
RL = 1kHD3
–110
0.1 1 10
FREQUENCY (MHz)
Figure 17. Harmonic Distortion vs. Frequency for Various Loads
Rev. J | Page 12 of 24

12 Page





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