AD8038_04 Datasheet, PDF (1/12 Pages) Analog Devices – Low Power 350 MHz Voltage Feedback Amplifiers

Low Power 350 MHz
Voltage Feedback Amplifiers
AD8038/AD8039
FEATURES
Low Power
1 mA Supply Current/Amp
High Speed
350 MHz, –3 dB Bandwidth (G = +1)
425 V/␮s 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: SOT-23-8, SC70-5, and SOIC-8
APPLICATIONS
Battery-Powered Instrumentation
Filters
A/D Drivers
Level Shifting
Buffering
High Density PC Boards
Photo Multipliers
PRODUCT DESCRIPTION
The AD8038 (single) and AD8039 (dual) amplifiers are high
speed (350 MHz) voltage feedback amplifiers with an exception-
ally low quiescent current of 1.0 mA/amplifier typical (1.5 mA max).
The AD8038 single amplifier in the SOIC-8 package has a dis-
able 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 voltage 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 band-
width, 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
CONNECTION DIAGRAMS
SOIC-8 (R)
SC70-5 (KS)
NC ¹
–IN 2
+IN 3
–V_S 4
AD8038
8 DISABLE
7 +V_S
6 V_OUT
5 NC
NC = NO CONNECT
AD8038
V_OUT 1
5 +V_S
–V_S 2
+–
+IN 3
4 –IN
SOIC-8 (R) and SOT-23-8 (RT)
V_OUT1 1
–IN1 2
+IN1 3
–V_{S 4}
AD8039
8 +V_S
7 V_OUT2
6 –IN2
5 +IN2
capacitive loads up to 15 pF. If driving larger capacitive 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 SOT-23-8 package, and the single
AD8038 is available in both a SOIC-8 and an SC70-5 package.
These amps are rated to work over the industrial temperature
range of –40°C to +85°C.
24
21 G = +10
18
15 G = +5
12
9
G = +2
6
3
G = +1
0
–3
–6
0.1
1
10
100
FREQUENCY – MHz
1000
REV. F
Figure 1. Small Signal Frequency Response for
Various Gains, V_OUT = 500 mV p-p, V_S = ±5 V
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