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Analog Devices Semiconductor Electronic Components Datasheet

AD849 Datasheet

High Speed/ Low Power Monolithic Op Amp

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a
High Speed, Low Power
Monolithic Op Amp
AD848/AD849
FEATURES
725 MHz Gain Bandwidth – AD849
175 MHz Gain Bandwidth – AD848
4.8 mA Supply Current
300 V/s Slew Rate
80 ns Settling Time to 0.1% for a 10 V Step – AD849
Differential Gain: AD848 = 0.07%, AD849 = 0.08%
Differential Phase: AD848 = 0.08؇, AD849 = 0.04؇
Drives Capacitive Loads
DC PERFORMANCE
3 nV/Hz Input Voltage Noise – AD849
85 V/mV Open Loop Gain into a 1 kLoad – AD849
1 mV max Input Offset Voltage
Performance Specified for ؎5 V and ؎15 V Operation
Available in Plastic, Hermetic Cerdip and Small Outline
Packages. Chips and MIL-STD-883B Parts Available.
Available in Tape and Reel in Accordance with
EIA-481A Standard
APPLICATIONS
Cable Drivers
8- and 10-Bit Data Acquisition Systems
Video and RF Amplification
Signal Generators
PRODUCT DESCRIPTION
The AD848 and AD849 are high speed, low power monolithic
operational amplifiers. The AD848 is internally compensated so
that it is stable for closed loop gains of 5 or greater. The AD849
is fully decompensated and is stable at gains greater than 24.
The AD848 and AD849 achieve their combination of fast ac
and good dc performance by utilizing Analog Devices’ junction
isolated complementary bipolar (CB) process. This process
enables these op amps to achieve their high speed while only
requiring 4.8 mA of current from the power supplies.
The AD848 and AD849 are members of Analog Devices’ family
of high speed op amps. This family includes, among others, the
AD847 which is unity gain stable, with a gain bandwidth of
50 MHz. For more demanding applications, the AD840,
AD841 and AD842 offer even greater precision and greater
output current drive.
The AD848 and AD849 have good dc performance. When
operating with ± 5 V supplies, they offer open loop gains of
13 V/mV (AD848 with a 500 load) and low input offset
voltage of 1 mV maximum. Common-mode rejection is a
minimum of 92 dB. Output voltage swing is ± 3 V even into
loads as low as 150 .
CONNECTION DIAGRAMS
Plastic (N),
Small Outline (R) and
Cerdip (Q) Packages
NULL 1 AD848/49 8 NULL
–IN 2
+IN 3
7 +VS
6 OUTPUT
–VS
4
TOP VIEW
(Not to Scale)
5
NC
NC = NO CONNECT
20-Terminal LCC Pinout
18 17 16 15 14
NC 19
OFFSET
NULL
20
NC 1
OFFSET
NULL
2
NC 3
AD848SE/883B
TOP VIEW
(Not to Scale)
13 NC
12 NC
11 NC
10 V–
9 NC
45 67 8
NC = NO CONNECT
APPLICATIONS HIGHLIGHTS
1. The high slew rate and fast settling time of the AD848 and
AD849 make them ideal for video instrumentation circuitry,
low noise pre-amps and line drivers.
2. In order to meet the needs of both video and data acquisition
applications, the AD848 and AD849 are optimized and
tested for ± 5 V and ± 15 V power supply operation.
3. Both amplifiers offer full power bandwidth greater than
20 MHz (for 2 V p-p with ± 5 V supplies).
4. The AD848 and AD849 remain stable when driving any
capacitive load.
5. Laser wafer trimming reduces the input offset voltage to
1 mV maximum on all grades, thus eliminating the need for
external offset nulling in many applications.
6. The AD848 is an enhanced replacement for the LM6164
series and can function as a pin-for-pin replacement for
many high speed amplifiers such as the HA2520/2/5 and
EL2020 in applications where the gain is 5 or greater.
REV. B
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


Analog Devices Semiconductor Electronic Components Datasheet

AD849 Datasheet

High Speed/ Low Power Monolithic Op Amp

No Preview Available !

AD848/AD849–SPECIFICATIONS (@ TA = +25؇C, unless otherwise noted)
Model
INPUT OFFSET VOLTAGE1
Offset Drift
INPUT BIAS CURRENT
INPUT OFFSET CURRENT
Offset Current Drift
Conditions
TMIN to TMAX
TMIN to TMAX
TMIN to TMAX
VS
±5 V
± 15 V
±5 V
± 15 V
±5 V, ± 15 V
±5 V, ± 15 V
±5 V, ± 15 V
±5 V, ± 15 V
±5 V, ± 15 V
±5 V, ± 15 V
AD848J
Min Typ Max
0.2 1
0.5 2.3
1.5
3.0
7
3.3 6.6
7.2
50 300
400
0.3
AD848A/S
Min Typ Max
0.2 1
0.5 2.3
2
3.5
7
3.3 6.6/5
7.5
50 300
400
0.3
Units
mV
mV
mV
mV
µV/°C
µA
µA
nA
nA
nA/°C
OPEN LOOP GAIN
VO = ± 2.5 V
RLOAD = 500
TMIN to TMAX
RLOAD = 150
VOUT = ± 10 V
RLOAD = 1 k
TMIN to TMAX
±5 V
± 15 V
9 13
7
8
12 20
8
9 13
7/5
8
12 20
8/6
V/mV
V/mV
V/mV
V/mV
V/mV
DYNAMIC PERFORMANCE
Gain Bandwidth
Full Power Bandwidth2
Slew Rate
Settling Time to 0.1%
Phase Margin
DIFFERENTIAL GAIN
AVCL 5
VO = 2 V p-p,
RL = 500
VO = 20 V p-p,
RL = 1 k
RLOAD = 1 k
–2.5 V to +2.5 V
10 V Step, AV = –4
CLOAD = 10 pF
RLOAD = 1 k
f = 4.4 MHz
±5 V
±15 V
±5 V
± 15 V
±5 V
± 15 V
±5 V
± 15 V
± 15 V
±15 V
125
175
24
4.7
200
225 300
65
100
60
0.07
125
175
24
4.7
200
225 300
65
100
60
0.07
MHz
MHz
MHz
MHz
V/µs
V/µs
ns
ns
Degrees
%
DIFFERENTIAL PHASE
f = 4.4 MHz
±15 V
0.08 0.08 Degree
COMMON-MODE REJECTION
POWER SUPPLY REJECTION
INPUT VOLTAGE NOISE
VCM = ± 2.5 V
VCM = ± 12 V
TMIN to TMAX
VS = ± 4.5 V to ± 18 V
TMIN to TMAX
f = 10 kHz
±5 V
±15 V
± 15 V
92 105
92 105
88
85 98
80
5
92 105
92 105
88
85 98
80
5
dB
dB
dB
dB
dB
nV/Hz
INPUT CURRENT NOISE
f = 10 kHz
± 15 V
1.5
1.5 pA/Hz
INPUT COMMON-MODE
VOLTAGE RANGE
±5 V
±15 V
+4.3
–3.4
+14.3
–13.4
+4.3
–3.4
+14.3
–13.4
V
V
V
V
OUTPUT VOLTAGE SWING
SHORT CIRCUIT CURRENT
RLOAD = 500
RLOAD = 150
RLOAD = 50
RLOAD = 1 k
RLOAD = 500
±5 V
±5 V
±5 V
± 15 V
±15 V
±15 V
3.0 3.6
2.5 3
1.4
12
10
32
3.0 3.6
2.5 3
1.4
12
10
32
±V
±V
±V
±V
±V
mA
INPUT RESISTANCE
70 70 k
INPUT CAPACITANCE
1.5 1.5 pF
OUTPUT RESISTANCE
Open Loop
15 15
POWER SUPPLY
Operating Range
Quiescent Current
TMIN to TMAX
TMIN to TMAX
±5 V
±15 V
؎4.5
4.8
5.1
؎18
6.0
7.4
6.8
8.0
؎4.5
4.8
5.1
؎18
6.0
7.4/8.3
6.8
8.0/9.0
V
mA
mA
mA
mA
NOTES
1Input offset voltage specifications are guaranteed after 5 minutes at TA = +25°C.
2Full power bandwidth = slew rate/2 π VPEAK. Refer to Figure 1.
All min and max specifications are guaranteed. Specifications in boldface are tested on all production units at final electrical test. All others are guaranteed but not necessarily tested.
Specifications subject to change without notice.
–2– REV. B


Part Number AD849
Description High Speed/ Low Power Monolithic Op Amp
Maker Analog Devices
Total Page 8 Pages
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