AD8397 Datasheet, PDF (1/16 Pages) Analog Devices – Rail-to-Rail, High Output Current Amplifier

Rail-to-Rail, High Output Current Amplifier
AD8397
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 @ 100 kHz
1.5 pA/√Hz current noise density @ 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 high current amplifiers
GENERAL DESCRIPTION
The AD8397 has 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 ADI’s 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
while also dissipating minimum power. The AD8397 is available
in a standard 8-lead SOIC package and, for higher power appli-
cations, a thermally enhanced 8-lead SOIC EPAD package. Both
packages can operate from −40°C to +85°C.
PIN CONFIGURATION
OUT1 1
–IN1 2
+IN1 3
–V_S 4
8 +V_S
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 20
TIME (µs)
Figure 2. Output Swing, VS = ±1.5 V, RL = 25 Ω
12
9
6
3
0
–3
–6
–9
–12
0 2 4 6 8 10 12 14 16 18 20
TIME (µs)
Figure 3. Output Swing, VS = ±12 V, RL = 100 Ω
Rev. 0
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