AD8039_15 Datasheet, PDF (1/17 Pages) Analog Devices – 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/μs slew rate
Low cost
Low noise
8 nV/√Hz @ 100 kHz
600 fA/√Hz @ 100 kHz
Low input bias current: 750 nA maximum
Low distortion
−90 dB SFDR @ 1 MHz
−65 dB SFDR @ 5 MHz
Wide supply range: 3 V to 12 V
Small packaging: 8-lead SOT-23, 5-lead SC70, and 8-lead SOIC
APPLICATIONS
Battery-powered instrumentation
Filters
A/D drivers
Level shifting
Buffering
Photo multipliers
GENERAL 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 maximum).
The AD8038 single amplifier in the 8-lead SOIC 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 a low input offset voltage of 3 mV
maximum.
The Analog Devices, Inc., 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 swing to within 1 V of each
rail on the output. These amplifiers are optimized for driving
capacitive loads up to 15 pF. If driving larger capacitive loads, a small
series resistor is needed to avoid excessive peaking or overshoot.
Low Power, 350 MHz
Voltage Feedback Amplifiers
AD8038/AD8039
FUNCTIONAL BLOCK DIAGRAM
NC 1
–IN 2
+IN 3
–V_S 4
AD8038
8 DISABLE
7 +V_S
6 V_OUT
5 NC
NC = NO CONNECT
Figure 1. 8-lead SOIC (R)
AD8038
V_OUT 1
5 +V_S
–V_S 2
+IN 3
4 –IN
Figure 2. 5-Lead SC70 (KS)
AD8039
V_OUT1 1
–IN1 2
+IN1 3
8 +V_S
7 V_OUT2
6 –IN2
–V_S 4
5 +IN2
NC = NO CONNECT
Figure 3. 8-Lead SOIC (R) and 8-Lead SOT-23 (RJ)
The AD8039 amplifier is available in a 8-lead SOT-23 package,
and the single AD8038 is available in both an 8-lead SOIC and a
5-lead SC70 package. These amplifiers 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
Figure 4. Small Signal Frequency Response for Various Gains,
VOUT = 500 mV p-p, VS = ±5 V
Rev. G
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