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PDF AD8397 Data sheet ( Hoja de datos )
| Número de pieza | AD8397 | |
| Descripción | Rail-to-Rail High Output Current Amplifier | |
| Fabricantes | Analog Devices | |
| Logotipo |  |
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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 (RLOAD = 25 Ω)
APPLICATIONS
Twisted-pair line drivers
Audio applications
General-purpose ac applications
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.
Rail-to-Rail, High Output
Current Amplifier
AD8397
PIN CONFIGURATION
OUT1 1
–IN1 2
+IN1 3
–VS 4
8 +VS
7 OUT2
6 –IN2
5 +IN2
Figure 1. 8-Lead SOIC
1.50
1.25
1.00
0.75
0.50
0.25
0
–0.25
–0.50
–0.75
–1.00
–1.25
–1.50
0
2 4 6 8 10 12 14 16 18
TIME (µs)
Figure 2. Output Swing, VS = ±1.5 V, RL = 25 Ω
20
12
9
6
3
0
–3
–6
–9
–12
0
2 4 6 8 10 12 14 16 18
TIME (µs)
Figure 3. Output Swing, VS = ±12 V, RL = 100 Ω
20
Rev. A
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 that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.461.3113
©2011 Analog Devices, Inc. All rights reserved.
1 page  
AD8397
VS = ±2.5V or +5 V (at TA = 25°C, G = +1, RL = 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
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 Current2
POWER SUPPLY
Operating Range (Dual Supply)
Supply Current
Power Supply Rejection
Test Conditions/Comments
VOUT = 0.1 V p-p
VOUT = 0.1 V p-p
VOUT = 2.0 V p-p
VOUT = 2.0 V p-p
fC = 100 kHz, VOUT = 2 V p-p, G = +2
f = 100 kHz
f = 100 kHz
TMIN − TMAX
TMIN − TMAX
VOUT = ±1.0 V
f = 100 kHz
ΔVCM = ±1 V
RLOAD = 25 Ω
RLOAD = 25 Ω
RLOAD = 100 Ω
RLOAD = 100 Ω
SFDR ≤ −70 dBc, f = 100 kHz, VOUT = 1.0 VP, RLOAD = 4.3 Ω
ΔVS = ±0.5 V
1 Unity gain used to facilitate characterization. To improve stability, a gain of 2 or greater is recommended.
2 Peak ac output current specification assumes normal ac operation and is not valid for continuous dc operation.
Min Typ Max Unit
60 MHz
4.8 MHz
14 MHz
53 V/μs
−98 dBc
4.5 nV/√Hz
1.5 pA/√Hz
1.0 2.4 mV
2.5 mV
1.0 2.0 mV
200 900 nA
1.3 μA
50 300 nA
85 90
dB
87
1.4
−76 −80
kΩ
pF
dB
+2.37
+2.45
0.2
+2.42
−2.37
+2.48
−2.46
230
−2.32
−2.42
Ω
VP
VP
VP
VP
mA
±1.5
79
−75 −85
±12.6
12
V
mA/Amp
dB
Rev. A | Page 4 of 16
5 Page 
AD8397
0
–10
–20
–30
–40
–50
–60
–70
–80
–90
–100
–110
–120
0.01
SECOND
HARMONIC
THIRD
HARMONIC
0.1 1
FREQUENCY (MHz)
Figure 17. Distortion vs. Frequency
(VS = ±5 V, VO = 2 V p-p, G = +2, RL = 25 Ω)
–40
10
–50
–60
–70
–80
SECOND
HARMONIC
–90
–100
–110
THIRD
HARMONIC
–120
0
0.25 0.50 0.75 1.00 1.25 1.50 1.75 2.00 2.25 2.50 2.75
OUTPUT VOLTAGE (V p-p)
Figure 18. Distortion vs. Output Voltage @ 100 kHz,
(VS = ±1.5 V, G = +2, RL = 25 Ω)
–40
–50
–60
–70
–80
–90
–100
SECOND
HARMONIC
–110
–120
0
THIRD
HARMONIC
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5
OUTPUT VOLTAGE (V p-p)
Figure 19. Distortion vs. Output Voltage @ 100 kHz,
(VS = ±2.5 V, G = +2, RL = 25 Ω)
5.0
–40
–50
–60
–70
–80
–90
–100
–110
SECOND
HARMONIC
THIRD
HARMONIC
–120
0123456789
OUTPUT VOLTAGE (V p-p)
Figure 20. Distortion vs. Output Voltage @ 100 kHz,
(VS = ±5 V, G = +2, RL = 25 Ω)
10
–40
–50
–60
–70
–80 SECOND
HARMONIC
–90
–100
–110
THIRD
HARMONIC
–120
0 2 4 6 8 10 12 14 16 18 20 22 24
OUTPUT VOLTAGE (V p-p)
Figure 21. Distortion vs. Output Voltage @ 100 kHz,
(VS = ±12 V, G = +5, RL = 50 Ω)
Rev. A | Page 10 of 16
11 Page | ||
| Páginas | Total 17 Páginas | |
| PDF Descargar | [ Datasheet AD8397.PDF ] | |
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