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FEATURES
Superior Performance
High Unity Gain BW: 50 MHz
Low Supply Current: 5.3 mA
High Slew Rate: 300 V/ s
Excellent Video Specifications
0.04% Differential Gain (NTSC and PAL)
0.19 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 )
Low Input Offset Voltage: 0.5 mV
Specified for 5 V and 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
APPLICATIONS
Video Instrumentation
Imaging Equipment
Copiers, Fax, Scanners, Cameras
High Speed Cable Driver
High Speed DAC and Flash ADC Buffers
High Speed, Low Power
Monolithic Op Amp
AD847
CONNECTION DIAGRAM
Plastic DIP (N),
Small Outline (R) and
Cerdip (Q) Packages
specifications which include an open-loop gain of 3500 V/V
(500
Ω
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
Ω.
Analog Devices also offers
over 30 other high speed amplifiers from the low noise AD829
(1.7 nV/√Hz) to the ultimate video amplifier, the AD811, which
features 0.01% differential gain and 0.01° differential phase.
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
QUIESCENT CURRENT – mA
5.5
5
4.5
4
0
5
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
AD847–SPECIFICATIONS
(@ T = +25 C, unless otherwise noted)
A
Model
Conditions
INPUT OFFSET VOLTAGE
Offset Drift
INPUT BIAS CURRENT
T
MIN
to T
MAX
INPUT OFFSET CURRENT
T
MIN
to T
MAX
Offset Current Drift
OPEN-LOOP GAIN
V
OUT
=
±
2.5 V
R
LOAD
= 500
Ω
T
MIN
to T
MAX
R
LOAD
= 150
Ω
V
OUT
=
±
10 V
R
LOAD
= 1 kΩ
T
MIN
to T
MAX
±
5 V
2
1
±
15 V
3
1.5
±
5 V
±
15 V
V
OUT
= 5 V p-p
R
LOAD
= 500
Ω,
V
OUT
= 20 V p-p,
R
LOAD
= 1 kΩ
R
LOAD
= 1 kΩ
–2.5 V to +2.5 V
10 V Step, A
V
= –1
–2.5 V to +2.5 V
10 V Step, A
V
= –1
C
LOAD
= 10 pF
R
LOAD
= 1 kΩ
f
≈
4.4 MHz, R
LOAD
= 1 kΩ
f
≈
4.4 MHz, R
LOAD
= 1 kΩ
V
CM
=
±
2.5 V
V
CM
=
±
12 V
T
MIN
to T
MAX
V
S
=
±
5 V to
±
15 V
T
MIN
to T
MAX
f = 10 kHz
f = 10 kHz
±
15 V
±
15 V
±
5 V
±
15 V
OUTPUT VOLTAGE SWING
R
LOAD
= 500
Ω
R
LOAD
= 150
Ω
R
LOAD
= 1 kΩ
R
LOAD
= 500
Ω
±
5 V
±
5 V
±
15 V
±
15 V
±
15 V
3.0
2.5
12
10
±
5 V
±
15 V
±
5 V
±
15 V
±
5 V
±
15 V
±
5 V
±
15 V
±
15 V
±
15 V
±
15 V
±
5 V
±
15 V
78
78
75
75
72
±
5 V,
±
15 V
±
5 V,
±
15 V
1
V
S
±
5 V
Min
AD847J
Typ
0.5
15
3.3
50
0.3
3.5
1.6
5.5
T
MIN
to T
MAX
Max
1
3.5
6.6
7.2
300
400
Min
AD847AR
Typ
Max
0.5
1
4
15
3.3
50
0.3
6.6
10
300
500
Units
mV
mV
µV/°C
µA
µA
nA
nA
nA/°C
V/mV
V/mV
V/mV
V/mV
V/mV
MHz
MHz
MHz
MHz
V/µs
V/µs
ns
ns
ns
ns
Degree
%
Degree
dB
dB
dB
dB
dB
nV/√Hz
pA/√Hz
V
V
V
V
±
V
±
V
±
V
±
V
mA
kΩ
pF
Ω
2
1
3.5
1.6
3
1.5
5.5
DYNAMIC PERFORMANCE
Unity Gain Bandwidth
Full Power Bandwidth
2
35
50
12.7
4.7
200
300
65
65
140
120
50
0.04
0.19
95
95
86
15
1.5
+4.3
–3.4
+14.3
–13.4
3.6
3
3.0
2.5
12
10
78
78
75
75
72
35
50
12.7
4.7
200
300
65
65
140
120
50
0.04
0.19
95
95
86
15
1.5
+4.3
–3.4
+14.3
–13.4
3.6
3
Slew Rate
3
Settling Time
to 0.1%, R
LOAD
= 250
Ω
to 0.01%, R
LOAD
= 250
Ω
Phase Margin
Differential Gain
Differential Phase
COMMON-MODE REJECTION
225
225
POWER SUPPLY REJECTION
INPUT VOLTAGE NOISE
INPUT CURRENT NOISE
INPUT COMMON-MODE
VOLTAGE RANGE
Short-Circuit Current
INPUT RESISTANCE
INPUT CAPACITANCE
OUTPUT RESISTANCE
POWER SUPPLY
Operating Range
Quiescent Current
T
MIN
to T
MAX
T
MIN
to T
MAX
N
OTES
l
32
300
1.5
32
300
1.5
15
18
6.0
7.3
6.3
7.6
4.5
4.8
5.3
18
6.0
7.3
6.3
7.6
Open Loop
4.5
15
±
5 V
±
15 V
4.8
5.3
V
mA
mA
mA
mA
Input Offset Voltage Specifications are guaranteed after 5 minutes at T
A
= +25°C.
Full Power Bandwidth = Slew Rate/2
π
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
–2–
REV. F
AD847
Model
Conditions
INPUT OFFSET VOLTAGE
Offset Drift
INPUT BIAS CURRENT
T
MIN
to T
MAX
INPUT OFFSET CURRENT
T
MIN
to T
MAX
Offset Current Drift
OPEN-LOOP GAIN
V
OUT
=
±
2.5 V
R
LOAD
= 500
Ω
T
MIN
to T
MAX
R
LOAD
= 150
Ω
V
OUT
= =
±
10 V
R
LOAD
= 1 kΩ
T
MIN
to T
MAX
±
5 V
2
1
±
15 V
3
1.5
±
5 V
±
15 V
V
OUT
= 5 V p-p
R
LOAD
= 500
Ω,
V
OUT
= 20 V p-p,
R
LOAD
= 1 kΩ
R
LOAD
= 1 kΩ
–2.5 V to +2.5 V
10 V Step, A
V
= –1
–2.5 V to +2.5 V
10 V Step, A
V
= –1
C
LOAD
= 10 pF
R
LOAD
= 1 kΩ
f
≈
4.4 MHz, R
LOAD
= 1 kΩ
f
≈
4.4 MHz, R
LOAD
= 1 kΩ
V
CM
=
±
2.5 V
V
CM
=
±
12 V
T
MIN
to T
MAX
V
S
=
±
5 V to
±
15 V
T
MIN
to T
MAX
f = 10 kHz
f = 10 kHz
±
15 V
±
15 V
±
5 V
±
15 V
OUTPUT VOLTAGE SWING
R
LOAD
= 500
Ω
R
LOAD
= 150
Ω
R
LOAD
= 1 kΩ
R
LOAD
= 500
Ω
±
5 V
±
5 V
±
15 V
±
15 V
±
15 V
3.0
2.5
12
10
±
5 V
±
15 V
±
5 V
±
15 V
±
5 V
±
15 V
±
5 V
±
15 V
±
15 V
±
15 V
±
15 V
±
5 V
±
15 V
80
80
75
75
72
3.5
1.6
5.5
3
1.5
2
1
3.5
1.6
5.5
V/mV
V/mV
V/mV
V/mV
V/mV
MHz
MHz
MHz
MHz
V/µs
V/µs
ns
ns
ns
ns
Degree
%
Degree
dB
dB
dB
dB
dB
nV/√Hz
pA/√Hz
V
V
V
V
±
V
±
V
±
V
±
V
mA
kΩ
pF
Ω
18
5.7
7.8
6.3
8.4
V
mA
mA
mA
mA
0.3
±
5 V,
±
15 V
50
±
5 V,
±
15 V
1
V
S
±
5 V
Min
T
MIN
to T
MAX
AD847AQ
Typ
Max
0.5
1
4
15
3.3
5
7.5
300
400
Min
AD847S
Typ
0.5
15
3.3
50
0.3
Max
1
4
5
7.5
300
400
Units
mV
mV
µV/°C
µA
µA
nA
nA
nA/°C
DYNAMIC PERFORMANCE
Unity Gain Bandwidth
Full Power Bandwidth
2
35
50
12.7
4.7
200
300
65
65
140
120
50
0.04
0.19
95
95
86
15
1.5
+4.3
–3.4
+14.3
–13.4
3.6
3
3.0
2.5
12
10
80
80
75
75
72
35
50
12.7
4.7
200
300
65
65
140
120
50
0.04
0.19
95
95
86
15
1.5
+4.3
–3.4
+14.3
–13.4
3.6
3
Slew Rate
3
225
225
Settling Time
to 0.1%, R
LOAD
= 250
Ω
to 0.01%, R
LOAD
= 250
Ω
Phase Margin
Differential Gain
Differential Phase
COMMON-MODE REJECTION
POWER SUPPLY REJECTION
INPUT VOLTAGE NOISE
INPUT CURRENT NOISE
INPUT COMMON-MODE
VOLTAGE RANGE
Short-Circuit Current
INPUT RESISTANCE
INPUT CAPACITANCE
OUTPUT RESISTANCE
POWER SUPPLY
Operating Range
Quiescent Current
T
MIN
to T
MAX
T
MIN
to T
MAX
Open Loop
32
300
1.5
15
4.5
4.8
5.3
18
5.7
7.0
6.3
7.6
4.5
32
300
1.5
15
±
5 V
±
15 V
4.8
5.3
REV. F
–3–
AD847
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:
θ
JA
= 100°C/Watt;
θ
JC
= 33°C/Watt
Cerdip Package:
θ
JA
= 110°C/Watt;
θ
JC
= 30°C/Watt
Small Outline Package:
θ
JA
= 155°C/Watt;
θ
JC
= 33°C/Watt
ABSOLUTE MAXIMUM RATINGS
1
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.
METALIZATION PHOTOGRAPH
Contact factory for latest dimensions.
Dimensions shown in inches and (mm).
ORDERING GUIDE
Models*
AD847JN
AD847JR
AD847AQ
AD847AR
AD847SQ
AD847SQ/883B
5962-8964701PA
Temperature
Range – C
0 to +70
0 to +70
–40 to +85
–40 to +85
–55 to +125
–55 to +125
–55 to +125
Package
Description
Plastic
SOIC
Cerdip
SOIC
Cerdip
Cerdip
Cerdip
Package
Option
N-8
R-8
Q-8
R-8
Q-8
Q-8
Q-8
*AD847 also available in J and S grade chips, and AD847JR and AD847AR are available
*in
tape and reel.
–4–
REV. F
嵌入式系统
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