D ts e t
aa h e
R c e t r lc r nc
o h se Ee to is
Ma u a t r dCo o e t
n fc u e
mp n n s
R c e tr b a d d c mp n ns ae
o h se rn e
o oet r
ma ua trd u ig ete dewaes
n fcue sn i r i/ fr
h
p rh s d f m te oiia s p l r
uc a e r
o h r n l u pi s
g
e
o R c e tr waes rce td f m
r o h se
fr e rae r
o
te oiia I. Al rce t n ae
h
r nl P
g
l e rai s r
o
d n wi tea p o a o teOC
o e t h p rv l f h
h
M.
P r aetse u igoiia fcoy
at r e td sn r n la tr
s
g
ts p o rmso R c e tr e eo e
e t rga
r o h se d v lp d
ts s lt n t g aa te p o u t
e t oui s o u rne
o
rd c
me t o e c e teOC d t s e t
es r x e d h
M aa h e.
Qu l yOv riw
ai
t
e ve
• IO- 0 1
S 90
•A 92 cr ct n
S 1 0 et ai
i
o
• Qu l e Ma ua trr Ls (
ai d
n fcues it QML MI- R -
) LP F
385
53
•C a sQ Mitr
ls
lay
i
•C a sVS a eL v l
ls
p c ee
• Qu l e S p l r Ls o D sr uos( L )
ai d u pi s it f it b tr QS D
e
i
•R c e trsacic l u pir oD A a d
o h se i
r ia s p l t L n
t
e
me t aln u t a dD A sa d r s
es lid sr n L tn ad .
y
R c e tr lcrnc , L i c mmi e t
o h se Ee t is L C s o
o
tdo
t
s p ligp o u t ta s t f c so r x e t-
u pyn rd cs h t ai y u tme e p ca
s
t n fr u lya daee u loto eoiial
i s o q ai n r q a t h s r n l
o
t
g
y
s p l db id sr ma ua trr.
u pi
e yn ut
y n fcues
T eoiia ma ua trr d ts e t c o a yn ti d c me t e e t tep r r n e
h r n l n fcue’ aa h e a c mp n ig hs o u n r cs h ef ma c
g
s
o
a ds e ic t n o teR c e tr n fcue v rino ti d vc . o h se Ee t n
n p c ai s f h o h se ma ua trd eso f hs e ie R c e tr lcr -
o
o
isg aa te tep r r n eo i s mio d co p o u t t teoiia OE s e ic -
c u rne s h ef ma c ft e c n u tr rd cs o h r n l M p c a
o
s
g
t n .T pc lv le aefr eee c p r o e o l. eti mii m o ma i m rt g
i s ‘y ia’ au s r o rfrn e up s s ny C r n nmu
o
a
r xmu ai s
n
ma b b s do p o u t h rceiain d sg , i lt n o s mpetsig
y e a e n rd c c aa tr t , e in smuai , r a l e t .
z o
o
n
© 2 1 R cetr l t n s LC Al i t R sre 0 1 2 1
0 3 ohs E cr i , L . lRg s eevd 7 1 0 3
e e oc
h
T l r m r, l s v iw wrcl . m
o e n oe p ae it w . e c o
a
e
s
o ec
a
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 k Load – 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 R
F
Amplification
Signal Generators
High Speed, Low Power
Monolithic Op Amp
AD848/AD849
CONNECTION DIAGRAMS
Plastic (N),
Small Outline (R) and
Cerdip (Q) Packages
NULL 1
–IN 2
+IN 3
–V
S
4
AD848/49
8 NULL
7 +V
S
6 OUTPUT
TOP VIEW
5 NC
(Not to Scale)
NC = NO CONNECT
20-Terminal LCC Pinout
OUTPUT
NC
18 17 16 15 14
NC 19
OFFSET 20
NULL
NC 1
OFFSET
NULL
NC
2
3
4
5
6
7
8
13 NC
V+
NC
NC
12 NC
11 NC
10 V–
9
NC
AD848SE/883B
TOP VIEW
(Not to Scale)
+IN
NC
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
Ω
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
Ω.
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
–IN
NC
NC
AD848/AD849–SPECIFICATIONS
(@ T = +25 C, unless otherwise noted)
A
Model
INPUT OFFSET VOLTAGE
1
Conditions
V
S
±
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
±
5 V
Min
T
MIN
to T
MAX
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
O
=
±
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
A
VCL
≥
5
V
O
= 2 V p-p,
R
L
= 500
Ω
V
O
= 20 V p-p,
R
L
= 1 kΩ
R
LOAD
= 1 kΩ
–2.5 V to +2.5 V
10 V Step, A
V
= –4
C
LOAD
= 10 pF
R
LOAD
= 1 kΩ
f = 4.4 MHz
f = 4.4 MHz
V
CM
=
±
2.5 V
V
CM
=
±
12 V
T
MIN
to T
MAX
V
S
=
±
4.5 V to
±
18 V
T
MIN
to T
MAX
f = 10 kHz
f = 10 kHz
AD848J
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
13
8
Min
AD848A/S
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
13
8
Units
mV
mV
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
Degrees
%
Degree
dB
dB
dB
dB
dB
nV/√Hz
pA/√Hz
V
V
V
V
±
V
±
V
±
V
±
V
±
V
mA
kΩ
pF
Ω
9
7
±
15 V
12
8
±
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
92
92
88
85
80
±
15 V
±
15 V
±
5 V
±
15 V
9
7/5
20
12
8/6
20
DYNAMIC PERFORMANCE
Gain Bandwidth
Full Power Bandwidth
2
125
175
24
4.7
200
300
65
100
60
0.07
0.08
105
105
98
5
1.5
+4.3
–3.4
+14.3
–13.4
3.0
2.5
12
10
32
70
1.5
3.6
3
1.4
3.0
2.5
12
10
92
92
88
85
80
125
175
24
4.7
200
300
65
100
60
0.07
0.08
105
105
98
5
1.5
+4.3
–3.4
+14.3
–13.4
3.6
3
1.4
Slew Rate
Settling Time to 0.1%
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
OUTPUT VOLTAGE SWING
R
LOAD
= 500
Ω
R
LOAD
= 150
Ω
R
LOAD
= 50
Ω
R
LOAD
= 1 kΩ
R
LOAD
= 500
Ω
±
5 V
±
5 V
±
5 V
±
15 V
±
15 V
±
15 V
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
70
1.5
15
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
15
4.5
4.8
5.1
±
5 V
±
15 V
V
mA
mA
mA
mA
NOTES
1
Input offset voltage specifications are guaranteed after 5 minutes at T
A
= +25°C.
2
Full power bandwidth = slew rate/2
π
V
PEAK
. 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
AD848/AD849
Model
INPUT OFFSET VOLTAGE
1
Conditions
V
S
±
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
±
5 V
Min
T
MIN
to T
MAX
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
O
=
±
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
A
VCL
≥
25
V
O
= 2 V p-p,
R
L
= 500
Ω
V
O
= 20 V p-p,
R
L
= 1 kΩ
R
LOAD
= 1 kΩ
–2.5 V to +2.5 V
10 V Step, A
V
= –24
C
LOAD
= 10 pF
R
LOAD
= 1 kΩ
f = 4.4 MHz
f = 4.4 MHz
V
CM
=
±
2.5 V
V
CM
=
±
12 V
T
MIN
to T
MAX
V
S
=
±
4.5 V to
±
18 V
T
MIN
to T
MAX
f = 10 kHz
f = 10 kHz
AD849J
Typ Max
0.3
1
0.3
1
1.3
1.3
2
3.3
6.6
7.2
50
300
400
0.3
50
32
Min
AD849A/S
Typ
Max
0.1
0.75
0.1
0.75
1.0
1.0
2
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
V/mV
V/mV
V/mV
V/mV
V/mV
MHz
MHz
MHz
MHz
V/µs
V/µs
ns
ns
Degrees
%
Degrees
dB
dB
dB
dB
dB
nV/√Hz
pA/√Hz
V
V
V
V
±
V
±
V
±
V
±
V
±
V
mA
kΩ
pF
Ω
30
20
±
15 V
45
30
±
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
100
100
96
98
94
±
15 V
±
15 V
±
5 V
±
15 V
30
50
20/15
32
45
85
30/25
520
725
20
4.7
200
300
65
80
60
0.08
0.04
100
100
96
98
94
115
115
120
3
1.5
+4.3
–3.4
+14.3
–13.4
3.0
2.5
12
10
3.6
3
1.4
85
DYNAMIC PERFORMANCE
Gain Bandwidth
Full Power Bandwidth
2
520
725
20
4.7
200
300
65
80
60
0.08
0.04
115
115
120
3
1.5
+4.3
–3.4
+14.3
–13.4
3.0
2.5
12
10
32
25
1.5
3.6
3
1.4
Slew Rate
Settling Time to 0.1%
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
OUTPUT VOLTAGE SWING
R
LOAD
= 500
Ω
R
LOAD
= 150
Ω
R
LOAD
= 50
Ω
R
LOAD
= 1 kΩ
R
LOAD
= 500
Ω
±
5 V
±
5 V
±
5 V
±
15 V
±
15 V
±
15 V
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
25
1.5
15
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
15
4.5
4.8
5.1
±
5 V
±
15 V
V
mA
mA
mA
mA
NOTES
1
Input offset voltage specifications are guaranteed after 5 minutes at T
A
= +25°C.
2
Full power bandwidth = slew rate/2
π
V
PEAK
. 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.
REV. B
–3–
AD848/AD849
Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
±
18 V
Internal Power Dissipation
2
Plastic (N) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.1 Watts
Small Outline (R) . . . . . . . . . . . . . . . . . . . . . . . . . 0.9 Watts
Cerdip (Q) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.1 Watts
LCC (E) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.8 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 per-
manent damage to the device. This is a stress rating only, and functional opera-
tion 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
LCC:
θ
JA
= 150°C/Watt
Mini-DIP Package:
θ
JA
= 110°C/Watt
Cerdip Package:
θ
JA
= 110°C/Watt
Small Outline Package:
θ
JA
= 155°C/Watt.
ABSOLUTE MAXIMUM RATINGS
1
METALIZATION PHOTOGRAPH
Contact factory for latest dimensions. (AD848 and AD849 are identical
except for the part number in the upper right.)
Dimensions shown in inches and (mm).
ORDERING GUIDE
Model
AD848JN
AD848JR
2
AD848JCHIPS
AD848AQ
AD848SQ
AD848SQ/883B
AD848SE/883B
AD849JN
AD849JR
2
AD849AQ
AD849SQ
AD849SQ/883B
AD847J/A/S
Gain
Bandwidth
MHz
175
175
175
175
175
175
175
725
725
725
725
725
50
Min
Stable
Gain
5
5
5
5
5
5
5
25
25
25
25
25
1
Max
Offset Voltage
mV
1
1
1
1
1
1
1
1
1
0.75
0.75
0.75
1
Temperature
Range – C
0 to +70
0 to +70
0 to +70
–40 to +85
–55 to +125
–55 to +125
–55 to +125
0 to +70
0 to +70
–40 to +85
–55 to +125
–55 to +125
Package
Option
1
N-8
R-8
Die Form
Q-8
Q-8
Q-8
E-20A
N-8
R-8
Q-8
Q-8
Q-8
See AD847 Data Sheet
NOTES
1
E = LCC; N = Plastic DIP; Q = Cerdip; R = Small Outline IC (SOIC).
2
Plastic SOIC (R) available in tape and reel. AD848 available in S grade chips. AD849 available in J and S grade
chips.
–4–
REV. B
