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AD847 High Speed, Low Power Monolithic Op Amp
a
High Speed, Low Power
Monolithic Op Amp
AD847
FEATURES
Superior Performance
High Unity Gain BW: 50 MHz
Low Supply Current: 5.3 mA
High Slew Rate: 300 V/ m s
Excellent Video Specifications
0.04% Differential Gain (NTSC and PAL)
0.19 8 Differential Phase (NTSC and PAL)
Drives Any Capacitive Load
Fast Settling Time to 0.1% (10 V Step): 65 ns
Excellent DC Performance
High Open-Loop Gain 5.5 V/mV (R LOAD = 1 k V )
Low Input Offset Voltage: 0.5 mV
Specified for 6 5 V and 6 15 V Operation
Available in a Wide Variety of Options
Plastic DIP and SOIC Packages
Cerdip Package
Die Form
MIL-STD-883B Processing
Tape & Reel (EIA-481A Standard)
Dual Version Available: AD827 (8 Lead)
Enhanced Replacement for LM6361
Replacement for HA2544, HA2520/2/5 and EL2020
CONNECTION DIAGRAM
Plastic DIP (N),
Small Outline (R) and
Cerdip (Q) Packages
specifications which include an open-loop gain of 3500 V/V
(500 W load) and low input offset voltage of 0.5 mV. Common-
mode rejection is a minimum of 78 dB. Output voltage swing is
± 3 V into loads as low as 150 W. Analog Devices also offers
over 30 other high speed amplifiers from the low noise AD829
(1.7 nV/ÖHz) to the ultimate video amplifier, the AD811, which
features 0.01% differential gain and 0.01° differential phase.
APPLICATIONS
Video Instrumentation
Imaging Equipment
Copiers, Fax, Scanners, Cameras
High Speed Cable Driver
High Speed DAC and Flash ADC Buffers
APPLICATION HIGHLIGHTS
1. As a buffer the AD847 offers a full-power bandwidth of
12.7 MHz (5 V p-p with ± 5 V supplies) making it outstand-
ing as an input buffer for flash A/D converters.
2. The low power and small outline package of the AD847
make it very well suited for high density applications such as
multiple pole active filters.
3. The AD847 is internally compensated for unity gain opera-
tion and remains stable when driving any capacitive load.
PRODUCT DESCRIPTION
The AD847 represents a breakthrough in high speed amplifiers
offering superior ac & dc performance and low power, all at low
cost. The excellent dc performance is demonstrated by its ± 5 V
6
5.5
5
4.5
4
0
10 15
SUPPLY VOLTAGE – ± Volts
20
Quiescent Current vs. Supply Voltage
AD847 Driving Capacitive Loads
REV. F
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
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 617/329-4700
Fax: 617/326-8703
5
199600151.004.png
AD847–SPECIFICATIONS
(@ T A = +25
8
C, unless otherwise noted)
Model
AD847J
AD847AR
Conditions
V S
Min
Typ
Max
Min
Typ
Max
Units
INPUT OFFSET VOLTAGE 1
± 5 V
0.5
1
0.5
1
mV
T MIN to T MAX
3.5
4
mV
Offset Drift
15
15
mV/°C
INPUT BIAS CURRENT
± 5 V, ± 15 V
3.3
6.6
3.3
6.6
mA
T MIN to T MAX
7.2
10
m
A
INPUT OFFSET CURRENT
± 5 V, ± 15 V
50
300
50
300
nA
T MIN to T MAX
400
500
nA
Offset Current Drift
0.3
0.3
nA/°C
OPEN-LOOP GAIN
V OUT = ± 2.5 V
± 5 V
R LOAD = 500 W
2
3.5
2
3.5
V/mV
T MIN to T MAX
1
1
V/mV
R LOAD = 150 W
1.6
1.6
V/mV
V OUT = ± 10 V
± 15 V
R LOAD = 1 kW
3
5.5
3
5.5
V/mV
T MIN to T MAX
1.5
1.5
V/mV
DYNAMIC PERFORMANCE
Unity Gain Bandwidth
± 5 V
35
35
MHz
±
15 V
50
50
MHz
Full Power Bandwidth 2
V OUT = 5 V p-p
R LOAD = 500 W,
± 5 V
12.7
12.7
MHz
V OUT = 20 V p-p,
R LOAD = 1 kW
± 15 V
4.7
4.7
MHz
Slew Rate 3
R LOAD = 1 kW
± 5 V
200
200
V/ms
± 15 V
225
300
225
300
V/ms
Settling Time
to 0.1%, R LOAD = 250 W
–2.5 V to +2.5 V
± 5 V
65
65
ns
10 V Step, A V = –1
± 15 V
65
65
ns
to 0.01%, R LOAD = 250
W
–2.5 V to +2.5 V
±
5 V
140
140
ns
10 V Step, A V = –1
± 15 V
120
120
ns
Phase Margin
C LOAD = 10 pF
± 15 V
R LOAD = 1 kW
50
50
Degree
Differential Gain
f » 4.4 MHz, R LOAD = 1 kW± 15 V
0.04
0.04
%
Differential Phase
f » 4.4 MHz, R LOAD = 1 kW± 15 V
0.19
0.19
Degree
COMMON-MODE REJECTION
V CM = ± 2.5 V
± 5 V
78
95
78
95
dB
V CM = ± 12 V
± 15 V
78
95
78
95
dB
T MIN to T MAX
75
75
dB
POWER SUPPLY REJECTION
V S = ± 5 V to ± 15 V
75
86
75
86
dB
T MIN to T MAX
72
72
dB
INPUT VOLTAGE NOISE
f = 10 kHz
± 15 V
15
15
nV/ÖHz
INPUT CURRENT NOISE
f = 10 kHz
± 15 V
1.5
1.5
pA/ÖHz
INPUT COMMON-MODE
VOLTAGE RANGE
± 5 V
+4.3
+4.3
V
–3.4
–3.4
V
± 15 V
+14.3
+14.3
V
–13.4
–13.4
V
OUTPUT VOLTAGE SWING
R LOAD = 500 W
± 5 V
3.0
3.6
3.0
3.6
± V
R LOAD = 150 W
± 5 V
2.5
3
2.5
3
± V
R LOAD = 1 kW
± 15 V
12
12
± V
R LOAD = 500 W
± 15 V
10
10
± V
Short-Circuit Current
± 15 V
32
32
mA
INPUT RESISTANCE
300
300
kW
INPUT CAPACITANCE
1.5
1.5
pF
OUTPUT RESISTANCE
Open Loop
15
15
W
POWER SUPPLY
Operating Range
6 4.5
6 18
6 4.5
6 18
V
Quiescent Current
± 5 V
4.8
6.0
4.8
6.0
mA
T MIN to T MAX
7.3
7.3
mA
± 15 V
5.3
6.3
5.3
6.3
mA
T MIN to T MAX
7.6
7.6
mA
N OTES
l Input Offset Voltage Specifications are guaranteed after 5 minutes at T A = +25°C.
2 Full Power Bandwidth = Slew Rate/2 p V PEAK .
3 Slew Rate is measured on rising edge.
All min and max specifications are guaranteed. Specifications in boldface are 100% tested at final electrical test.
Specifications subject to change without notice.
–2–
REV. F
199600151.005.png 199600151.006.png
AD847
Model
AD847AQ
AD847S
Conditions
V S
Min
Typ
Max
Min
Typ
Max
Units
INPUT OFFSET VOLTAGE 1
± 5 V
0.5
1
0.5
1
mV
T MIN to T MAX
4
4
mV
Offset Drift
15
15
mV/°C
INPUT BIAS CURRENT
± 5 V, ± 15 V
3.3
5
3.3
5
mA
T MIN to T MAX
7.5
7.5
mA
INPUT OFFSET CURRENT
±
5 V,
±
15 V
50
300
50
300
nA
T MIN to T MAX
400
400
nA
Offset Current Drift
0.3
0.3
nA/°C
OPEN-LOOP GAIN
V OUT = ± 2.5 V
± 5 V
R LOAD = 500 W
2
3.5
2
3.5
V/mV
T MIN to T MAX
1
1
V/mV
R LOAD = 150 W
1.6
1.6
V/mV
V OUT = = ± 10 V
± 15 V
R LOAD = 1 k
W
3
5.5
3
5.5
V/mV
T MIN to T MAX
1.5
1.5
V/mV
DYNAMIC PERFORMANCE
Unity Gain Bandwidth
± 5 V
35
35
MHz
± 15 V
50
50
MHz
Full Power Bandwidth 2
V OUT = 5 V p-p
R LOAD = 500 W,
± 5 V
12.7
12.7
MHz
V OUT = 20 V p-p,
R LOAD = 1 kW
± 15 V
4.7
4.7
MHz
Slew Rate 3
R LOAD = 1 kW
± 5 V
200
200
V/ms
± 15 V
225
300
225
300
V/ms
Settling Time
to 0.1%, R LOAD = 250 W
–2.5 V to +2.5 V
± 5 V
65
65
ns
10 V Step, A V = –1
± 15 V
65
65
ns
to 0.01%, R LOAD = 250 W
–2.5 V to +2.5 V
± 5 V
140
140
ns
10 V Step, A V = –1
± 15 V
120
120
ns
Phase Margin
C LOAD = 10 pF
± 15 V
R LOAD = 1 kW
50
50
Degree
Differential Gain
f » 4.4 MHz, R LOAD = 1 kW± 15 V
0.04
0.04
%
Differential Phase
f » 4.4 MHz, R LOAD = 1 kW± 15 V
0.19
0.19
Degree
COMMON-MODE REJECTION
V CM = ± 2.5 V
± 5 V
80
95
80
95
dB
V CM = ± 12 V
± 15 V
80
95
80
95
dB
T MIN to T MAX
75
75
dB
POWER SUPPLY REJECTION
V S =
±
5 V to
±
15 V
75
86
75
86
dB
T MIN to T MAX
72
72
dB
INPUT VOLTAGE NOISE
f = 10 kHz
± 15 V
15
15
nV/ÖHz
INPUT CURRENT NOISE
f = 10 kHz
± 15 V
1.5
1.5
pA/ÖHz
INPUT COMMON-MODE
VOLTAGE RANGE
± 5 V
+4.3
+4.3
V
–3.4
–3.4
V
± 15 V
+14.3
+14.3
V
–13.4
–13.4
V
OUTPUT VOLTAGE SWING
R LOAD = 500 W
± 5 V
3.0
3.6
3.0
3.6
± V
R LOAD = 150 W
± 5 V
2.5
3
2.5
3
± V
R LOAD = 1 kW
± 15 V
12
12
± V
R LOAD = 500 W
± 15 V
10
10
± V
Short-Circuit Current
± 15 V
32
32
mA
INPUT RESISTANCE
300
300
kW
INPUT CAPACITANCE
1.5
1.5
pF
OUTPUT RESISTANCE
Open Loop
15
15
W
POWER SUPPLY
Operating Range
6 4.5
6 18
6 4.5
6 18
V
Quiescent Current
± 5 V
4.8
5.7
4.8
5.7
mA
T MIN to T MAX
7.0
7.8
mA
± 15 V
5.3
6.3
5.3
6.3
mA
T MIN to T MAX
7.6
8.4
mA
REV. F
–3–
199600151.007.png 199600151.001.png
AD847
ABSOLUTE MAXIMUM RATINGS 1
Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ± 18 V
Internal Power Dissipation 2
Plastic (N) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.2 Watts
Small Outline (R) . . . . . . . . . . . . . . . . . . . . . . . . . 0.8 Watts
Cerdip (Q) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.1 Watts
Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ± V S
Differential Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . ± 6 V
Storage Temperature Range (Q) . . . . . . . . . –65°C to +150°C
(N, R) . . . . . . . . . . . . . . . . . . . . . . . . . . . –65°C to +125°C
Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . 175°C
Lead Temperature Range (Soldering 60 sec) . . . . . . . +300°C
NOTES
1 Stresses above those listed under “Absolute Maximum Ratings” may cause
permanent damage to the device. This is a stress rating only, and functional
operation of the device at these or any other conditions above those indicated in
the operational section of this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect device reliability.
2 Mini-DIP Package:
ESD SUSCEPTIBILITY
ESD (electrostatic discharge) sensitive device. Electrostatic
charges as high as 4000 volts, which readily accumulate on the
human body and on test equipment, can discharge without de-
tection. Although the AD847 features proprietary ESD protec-
tion circuitry, permanent damage may still occur on these
devices if they are subjected to high energy electrostatic dis-
charges. Therefore, proper ESD precautions are recommended
to avoid any performance degradation or loss of functionality.
q JA = 100
°
C/Watt;
q JC = 33
°
C/Watt
Cerdip Package:
q JA = 110
C/Watt;
q JC = 30
°
C/Watt
Small Outline Package:
q JA = 155
°
C/Watt;
q JC = 33
°
C/Watt
METALIZATION PHOTOGRAPH
Contact factory for latest dimensions.
Dimensions shown in inches and (mm).
ORDERING GUIDE
Temperature
Package
Package
Models*
Range –
8
C
Description Option
AD847JN
0 to +70
Plastic
N-8
AD847JR
0 to +70
SOIC
R-8
AD847AQ
–40 to +85
Cerdip
Q-8
AD847AR
–40 to +85
SOIC
R-8
AD847SQ
–55 to +125
Cerdip
Q-8
AD847SQ/883B
–55 to +125
Cerdip
Q-8
5962-8964701PA
–55 to +125
Cerdip
Q-8
*AD847 also available in J and S grade chips, and AD847JR and AD847AR are available
* in tape and reel.
–4–
REV. F
°
199600151.002.png
AD847
Typical Characteristics
(@ +25
8
C and V S =
6
15 V, unless otherwise noted)
20
20
15
15
+V IN
+V OUT
10
10
–V IN
–V OUT
5
5
R = 500
W
0
0
0
5
10
15
20
0
5
10
15
20
SUPPLY VOLTAGE –
±
Volts
SUPPLY VOLTAGE –
±
Volts
Figure 1. Input Common-Mode Range vs. Supply Voltage
Figure 2. Output Voltage Swing vs. Supply Voltage
30
6
25
5.5
20
± 15 V SUPPLIES
15
5
10
4.5
±
5V SUPPLIES
5
0
4
10
100
1k
10k
0
5
10
15
20
LOAD RESISTANCE –
W
SUPPLY VOLTAGE – ± Volts
Figure 3. Output Voltage Swing vs. Load Resistance
Figure 4. Quiescent Current vs. Supply Voltage
5
100
10
4
V = ± 5V
S
1
3
0.1
2
0.01
–60
–40
–20
0
20
40
60
80
100
120
140
10k
100k
1M
10M
100M
TEMPERATURE –
°
C
FREQUENCY – Hz
Figure 5. Input Bias Current vs. Temperature
Figure 6. Output Impedance vs. Frequency
REV. F
–5–
LOAD
199600151.003.png

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