REV. B
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AD8038/AD8039
Low Power 350 MHz
Voltage Feedback Amplifiers
FEATURES
Low Power
1 mA Supply Current/Amp
High Speed
350 MHz, –3 dB Bandwidth (G = +1)
425 V/H9262s Slew Rate
Low Cost
Low Noise
8 nV/√Hz @ 100 kHz
600 fA/√Hz @ 100 kHz
Low Input Bias Current: 750 nA Max
Low Distortion
–90 dB SFDR @ 1 MHz
–65 dB SFDR @ 5 MHz
Wide Supply Range: 3 V to 12 V
Small Packaging: SOT23-8, SC70-5, and SOIC-8
APPLICATIONS
Battery-Powered Instrumentation
Filters
A/D Driver
Level Shifting
Buffering
High Density PC Boards
Photo Multiplier
SOIC-8 (R) and SOT23-8 (RT)*
AD8039
8
7
6
5
1
2
3
4
V
OUT1
–IN1
+IN1
–V
S
+V
S
V
OUT2
–IN2
+IN2
PRODUCT DESCRIPTION
The AD8038 (single) and AD8039 (dual) amplifiers are high
speed (350 MHz) voltage feedback amplifiers with an exceptionally
low quiescent current of 1.0 mA/amplifier typical (1.5 mA max).
The AD8038 single amplifier in the SOIC-8 package has a
disable feature. Despite being low power and low cost, the
amplifier provides excellent overall performance. Additionally,
it offers a high slew rate of 425 V/µs and low input offset volt-
age of 3 mV max.
ADI’s proprietary XFCB process allows low noise operation
(8 nV/√Hz and 600 fA/√Hz) at extremely low quiescent currents.
Given a wide supply voltage range (3 V to 12 V), wide bandwidth,
and small packaging, the AD8038 and AD8039 amplifiers are
designed to work in a variety of applications where power and space
are at a premium.
The AD8038 and AD8039 amplifiers have a wide input common-
mode range of 1 V from either rail and will swing within 1 V of
each rail on the output. These amplifiers are optimized for
driving capacitive loads up to 15 pF. If driving larger capaci-
tive loads, a small series resistor is needed to avoid excessive
peaking or overshoot.
The AD8039 amplifier is the only dual low power, high speed
amplifier available in a tiny SOT23-8 package, and the single
AD8038 is available in both a SOIC-8 and a SC70-5 package.
These amps are rated to work over the industrial temperature
range of –40°C to +85°C.
–6
0.1 1000110100
–3
0
3
6
9
12
15
18
21
24
FREQUENCY – MHz
GAIN – dB
G = +5
G = +2
G = +1
G = +10
Figure 1. Small Signal Frequency Response for
Various Gains, V
OUT
= 500 mV p-p, V
S
= ±5 V
*Not yet released
SOIC-8 (R)
8
7
6
5
1
2
3
4
NC
–IN
+IN
DISABLE
+V
S
V
OUT
NC–V
S
AD8038
NC = NO CONNECT
SC70-5 (KS)
1
2
3
5
4 –IN+IN
+V
S
V
OUT
AD8038
+–
–V
S
CONNECTION DIAGRAMS