Data Sheet
FEATURES
Dual operational amplifier
Voltage feedback
Wide supply range from 3 V to 24 V
Rail-to-rail output
Output swing to within 0.5 V of supply rails
High linear output current
310 mA peak into 32 Ω on ±12 V supplies while maintaining
−80 dBc SFDR
Low noise
4.5 nV/√Hz voltage noise density at 100 kHz
1.5 pA/√Hz current noise density at 100 kHz
High speed
69 MHz bandwidth (G = 1, −3 dB)
53 V/μs slew rate (R
LOAD
= 25 Ω)
Rail-to-Rail, High Output
Current Amplifier
AD8397
PIN CONFIGURATION
OUT1
1
–IN1
2
+IN1
3
–V
S 4
8
7
6
5
+V
S
OUT2
05069-001
–IN2
+IN2
Figure 1. 8-Lead SOIC
1.50
1.25
1.00
0.75
0.50
V
OUT
(V)
0.25
0
–0.25
–0.50
APPLICATIONS
Twisted-pair line drivers
Audio applications
General-purpose ac applications
–0.75
–1.00
–1.25
–1.50
0
2
4
6
8
10
TIME (µs)
12
14
16
18
20
05069-031
Figure 2. Output Swing, V
S
= ±1.5 V, R
L
= 25 Ω
GENERAL DESCRIPTION
The AD8397 comprises two voltage feedback operational amplifiers
capable of driving heavy loads with excellent linearity. The
common-emitter, rail-to-rail output stage surpasses the output
voltage capability of typical emitter-follower output stages and
can swing to within 0.5 V of either rail while driving a 25 Ω
load. The low distortion, high output current, and wide output
dynamic range make the AD8397 ideal for applications that
require a large signal swing into a heavy load.
Fabricated with Analog Devices, Inc., high speed extra fast
complementary bipolar high voltage (XFCB-HV) process, the
high bandwidth and fast slew rate of the AD8397 keep distortion to
a minimum. The AD8397 is available in a standard 8-lead SOIC_N
package and, for higher power dissipating applications, a thermally
enhanced 8-lead SOIC_N_EP package. Both packages can operate
from −40°C to +85°C.
12
9
6
3
V
OUT
(V)
0
–3
–6
05069-032
–9
–12
0
2
4
6
8
10
TIME (µs)
12
14
16
18
20
Figure 3. Output Swing, V
S
= ±12 V, R
L
= 100 Ω
Rev. B
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Trademarks and registered trademarks are the property of their respective owners.
AD8397
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications ....................................................................................... 1
General Description ......................................................................... 1
Pin Configuration ............................................................................. 1
Revision History ............................................................................... 2
Specifications..................................................................................... 3
Absolute Maximum Ratings............................................................ 7
Maximum Power Dissipation ..................................................... 7
ESD Caution .................................................................................. 7
Data Sheet
Typical Performance Characteristics ..............................................8
Applications Information .............................................................. 11
Power Supply and Decoupling.................................................. 11
Layout Considerations ............................................................... 11
Unity-Gain Output Swing ......................................................... 11
Capacitive Load Drive ............................................................... 12
Outline Dimensions ....................................................................... 13
Ordering Guide .......................................................................... 13
REVISION HISTORY
6/2019—Rev. A to Rev. B
Replaced Figure 2 and Figure 3 ...................................................... 1
Changes to Table 1 ............................................................................ 3
Changes to Table 2 ............................................................................ 4
Changes to Table 3 ............................................................................ 5
Changes to Table 4 ............................................................................ 6
Replaced Figure 9 and Figure 10 .................................................... 8
Replaced Figure 12, Figure 14, and Figure 15 ............................... 9
Updated Outline Dimensions ....................................................... 13
5/2011—Rev. 0 to Rev. A
Changes to Applications Section and General Description
Section ................................................................................................ 1
Changed Maximum Output Current Parameter to Peak AC
Output Current Parameter, Table 1 ................................................ 3
Added Note 1 and Note 2, Table 1 .................................................. 3
Changed Maximum Output Current Parameter to Peak AC
Output Current Parameter, Table 2 ................................................ 4
Added Note 1 and Note 2, Table 2 .................................................. 4
Changed Maximum Output Current Parameter to Peak AC
Output Current Parameter, Table 3 .................................................5
Added Note 1 and Note 2, Table 3...................................................5
Changed Maximum Output Current Parameter to Peak AC
Output Current Parameter, Table 4 .................................................6
Added Note 1 and Note 2, Table 4...................................................6
Changes to Figure 4 ...........................................................................7
Changed General Description Section to Applications
Information Section ....................................................................... 11
Updated Outline Dimensions ....................................................... 13
1/2005—Revision 0: Initial Version
Rev. B | Page 2 of 16
Data Sheet
SPECIFICATIONS
V
S
= ±1.5 V or +3 V (at T
A
= 25°C, G = +1, R
L
= 25 Ω, unless otherwise noted)
1
.
Table 1.
Parameter
DYNAMIC PERFORMANCE
−3 dB Bandwidth
0.1 dB Flatness
Large Signal Bandwidth
Slew Rate
NOISE/DISTORTION PERFORMANCE
Distortion (Worst Harmonic)
Input Voltage Noise
Input Current Noise
DC PERFORMANCE
Input Offset Voltage
Input Offset Voltage Match
Input Bias Current
T
MIN
− T
MAX
Input Offset Current
Open-Loop Gain
INPUT CHARACTERISTICS
Input Resistance
Input Capacitance
Common-Mode Rejection
OUTPUT CHARACTERISTICS
Output Resistance
+Swing
−Swing
+Swing
−Swing
Peak AC Output Current
2
POWER SUPPLY
Operating Range (Dual Supply)
Supply Current
Power Supply Rejection
1
2
AD8397
Test Conditions/Comments
V
OUT
= 0.1 V p-p
V
OUT
= 0.1 V p-p
V
OUT
= 2.0 V p-p
V
OUT
= 0.8 V p-p
f
C
= 100 kHz, V
OUT
= 1.4 V p-p, G = +2
f = 100 kHz
f = 100 kHz
Min
Typ
50
3.6
9
32
−90
4.5
1.5
1.0
2.5
1.0
200
1.3
50
88
87
1.4
−80
0.2
+1.39
−1.36
+1.47
−1.46
170
Max
Unit
MHz
MHz
MHz
V/μs
dBc
nV/√Hz
pA/√Hz
2.5
2.0
900
300
T
MIN
− T
MAX
V
OUT
= ±0.5 V
f = 100 kHz
ΔV
CM
= ±1 V
81
mV
mV
mV
nA
μA
nA
dB
kΩ
pF
dB
Ω
V
P
V
P
V
P
V
P
mA
V
mA/Amp
dB
−71
R
LOAD
= 25 Ω
R
LOAD
= 25 Ω
R
LOAD
= 100 Ω
R
LOAD
= 100 Ω
SFDR ≤ −70 dBc, f = 100 kHz, V
OUT
= 0.7 V
P
, R
LOAD
= 4.1 Ω
+1.33
+1.43
−1.34
−1.42
ΔV
S
= ±0.5 V
±1.5
6
−70
7
−82
±12.0
8.5
Unity gain used to facilitate characterization. To improve stability, a gain of 2 or greater is recommended.
Peak ac output current specification assumes normal ac operation and is not valid for continuous dc operation.
Rev. B | Page 3 of 16
AD8397
V
S
= ±2.5V or +5 V (at T
A
= 25°C, G = +1, R
L
= 25 Ω, unless otherwise noted)
1
.
Table 2.
Parameter
DYNAMIC PERFORMANCE
−3 dB Bandwidth
0.1 dB Flatness
Large Signal Bandwidth
Slew Rate
NOISE/DISTORTION PERFORMANCE
Distortion (Worst Harmonic)
Input Voltage Noise
Input Current Noise
DC PERFORMANCE
Input Offset Voltage
Input Offset Voltage Match
Input Bias Current
T
MIN
− T
MAX
Input Offset Current
Open-Loop Gain
INPUT CHARACTERISTICS
Input Resistance
Input Capacitance
Common-Mode Rejection
OUTPUT CHARACTERISTICS
Output Resistance
+Swing
−Swing
+Swing
−Swing
Peak AC Output Current
2
POWER SUPPLY
Operating Range (Dual Supply)
Supply Current
Power Supply Rejection
1
2
Data Sheet
Test Conditions/Comments
V
OUT
= 0.1 V p-p
V
OUT
= 0.1 V p-p
V
OUT
= 2.0 V p-p
V
OUT
= 2.0 V p-p
f
C
= 100 kHz, V
OUT
= 2 V p-p, G = +2
f = 100 kHz
f = 100 kHz
Min
Typ
60
4.8
14
53
−98
4.5
1.5
1.0
2.5
1.0
200
1.3
50
90
87
1.4
−80
0.2
+2.35
−2.29
+2.45
−2.43
230
Max
Unit
MHz
MHz
MHz
V/μs
dBc
nV/√Hz
pA/√Hz
2.4
2.0
900
300
T
MIN
− T
MAX
V
OUT
= ±1.0 V
f = 100 kHz
ΔV
CM
= ±1 V
85
mV
mV
mV
nA
μA
nA
dB
kΩ
pF
dB
Ω
V
P
V
P
V
P
V
P
mA
V
mA/Amp
dB
−76
R
LOAD
= 25 Ω
R
LOAD
= 25 Ω
R
LOAD
= 100 Ω
R
LOAD
= 100 Ω
SFDR ≤ −70 dBc, f = 100 kHz, V
OUT
= 1.0 V
P
, R
LOAD
= 4.3 Ω
+2.29
+2.4
−2.22
−2.38
ΔV
S
= ±0.5 V
±1.5
7
−75
9
−85
±12.6
12
Unity gain used to facilitate characterization. To improve stability, a gain of 2 or greater is recommended.
Peak ac output current specification assumes normal ac operation and is not valid for continuous dc operation.
Rev. B | Page 4 of 16
Data Sheet
V
S
= ±5 V or +10 V (at T
A
= 25°C, G = +1, R
L
= 25 Ω, unless otherwise noted)
1
.
Table 3.
Parameter
DYNAMIC PERFORMANCE
−3 dB Bandwidth
0.1 dB Flatness
Large Signal Bandwidth
Slew Rate
NOISE/DISTORTION PERFORMANCE
Distortion (Worst Harmonic)
Input Voltage Noise
Input Current Noise
DC PERFORMANCE
Input Offset Voltage
Input Offset Voltage Match
Input Bias Current
T
MIN
− T
MAX
Input Offset Current
Open-Loop Gain
INPUT CHARACTERISTICS
Input Resistance
Input Capacitance
Common-Mode Rejection
OUTPUT CHARACTERISTICS
Output Resistance
+Swing
−Swing
+Swing
−Swing
Peak AC Output Current
2
POWER SUPPLY
Operating Range (Dual Supply)
Supply Current
Power Supply Rejection
1
2
AD8397
Test Conditions/Comments
V
OUT
= 0.1 V p-p
V
OUT
= 0.1 V p-p
V
OUT
= 2.0 V p-p
V
OUT
= 4.0 V p-p
f
C
= 100 kHz, V
OUT
= 6 V p-p, G = +2
f = 100 kHz
f = 100 kHz
Min
Typ
66
6.5
14
53
−94
4.5
1.5
1.0
2.5
1.0
200
1.3
50
94
87
1.4
−94
0.2
+4.69
−4.90
+4.92
−4.88
250
Max
Unit
MHz
MHz
MHz
V/μs
dBc
nV/√Hz
pA/√Hz
2.5
2.0
900
300
T
MIN
− T
MAX
V
OUT
= ±2.0 V
f = 100 kHz
ΔV
CM
= ±1 V
85
mV
mV
mV
nA
μA
nA
dB
kΩ
pF
dB
Ω
V
P
V
P
V
P
V
P
mA
V
mA/Amp
dB
−84
R
LOAD
= 25 Ω
R
LOAD
= 25 Ω
R
LOAD
= 100 Ω
R
LOAD
= 100 Ω
SFDR ≤ −80 dBc, f = 100 kHz, V
OUT
= 3 V
P
, R
LOAD
= 12 Ω
+4.48
+4.87
−4.42
−4.81
ΔV
S
= ±0.5 V
±1.5
7
−76
9
−85
±12.6
12
Unity gain used to facilitate characterization. To improve stability, a gain of 2 or greater is recommended.
Peak ac output current specification assumes normal ac operation and is not valid for continuous dc operation.
Rev. B | Page 5 of 16
