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ADA4841-1 Datasheet, PDF (1/20 Pages) Analog Devices – Low Power, Low Noise and Distortion, Rail-to-Rail Output Amplifier | |||
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Low Power, Low Noise and Distortion,
Rail-to-Rail Output Amplifier
ADA4841-1/ADA4841-2
FEATURES
Low power: 1.1 mA/amp
Low wideband noise
2.1 nV/âHz
1.4 pA/âHz
Low 1/f noise
7 nV/âHz @ 10 Hz
13 pA/âHz @ 10 Hz
Low distortion: â105 dBc @ 100 kHz, VO = 2 V p-p
High speed
80 MHz, â3 dB bandwidth (G = +1)
12 V/μs slew rate
175 ns settling time to 0.1%
Low offset voltage: 0.3 mV maximum
Rail-to-rail output
Power down
Wide supply range: 2.7 V to 12 V
APPLICATIONS
Low power, low noise signal processing
Battery-powered instrumentation
16-bit PulSAR® ADC drivers
GENERAL DESCRIPTION
The ADA4841-1/ADA4841-2 are unity gain stable, low
noise and distortion, rail-to-rail output amplifiers that have a
quiescent current of 1.5 mA maximum. Despite their low power
consumption, these amplifiers offer low wideband voltage noise
performance of 2.1 nV/âHz and 1.4 pA/âHz current noise,
along with excellent spurious-free dynamic range (SFDR) of
â105 dBc at 100 kHz. To maintain a low noise environment at
lower frequencies, the amplifiers have low 1/f noise of 7 nV/âHz
and 13 pA/âHz at 10 Hz.
The ADA4841-1/ADA4841-2 output can swing to less than
50 mV of either rail. The input common-mode voltage range
extends down to the negative supply. The ADA4841-1/
ADA4841-2 can drive up to 10 pF of capacitive load with
minimal peaking.
The ADA4841-1/ADA4841-2 provide the performance required
to efficiently support emerging 16-bit to 18-bit ADCs and are
ideal for portable instrumentation, high channel count, industrial
measurement, and medical applications. The ADA4841-1/
ADA4841-2 are ideally suited to drive the AD7685/AD7686,
16-bit PulSAR ADCs.
Rev. C
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.
Trademarks and registered trademarks are the property of their respective owners.
CONNECTION DIAGRAMS
ADA4841-1
TOP VIEW
NC 1 (Not to Scale) 8 POWER DOWN
âIN 2
7 +VS
+IN 3
6 VOUT
âVS 4
5 NC
Figure 1. 8-Lead SOIC (R)
ADA4841-2
OUT1 1
âIN1 2
+IN1 3
âVS 4
8 +VS
7 OUT2
6 âIN2
5 +IN2
TOP VIEW
(Not to Scale)
Figure 2. 8-Lead MSOP (RM-8) and 8-Lead SOIC_N (R)
ADA4841-1
VOUT 1
6 +VS
âVS 2
5 POWER DOWN
+IN 3
4 âIN
Figure 3. 6-Lead SOT-23 (RJ)
The ADA4841-1/ADA4841-2 packages feature Pb-free lead
finish. The amplifiers are rated to work over the industrial
temperature range (â40°C to +125°C).
â30
VS = ±5V
â40 G = +1
â50
â60
â70
2V p-p THIRD
â80
â90
â100
2V p-p SECOND
â110
â120
0.01
0.1
1
FREQUENCY (MHz)
Figure 4. Harmonic Distortion
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
©2006 Analog Devices, Inc. All rights reserved.
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