Integrated Analog Front-end Simplifies Sensor Interfaces
May 12 2015 - 8:00AM
Business Wire
Analog Devices, Inc. today introduced a FET input AFE with an
integrated ADC driver designed to interface directly with current
mode sensors such as photo diodes and high output impedance voltage
sensors. The ADA4350 integrates a FET input amplifier, switching
network and ADC driver into a single package, which simplifies
design and lowers power and PCB footprint by more than 50 percent
compared to discrete implementations.
The ADA4350 features low-noise performance at low frequencies of
90nV/√Hz at 10 Hz and broadband noise of 5 nV/√Hz at 100 kHz to
maximize the signal-to-noise ratio of the sensor output. Wide
dynamic range measurement for small, sensitive signals such as
photons or electrons is enabled with the inclusion of integrated
gain switching. The on-chip programmability of the ADA4350 allows
designers to select external, optimized feedback components. With
one chip, a single-ended or differential sensor current or voltage
signal can be transformed to a high-speed, low-noise, single-ended
or differential-output voltage.
- Download data sheet, view product page
and order samples: http://www.analog.com/ADA4350
- Order the ADA4350 evaluation board:
http://www.analog.com/EVAL-ADA4350
- Get questions answered by ADI engineers
on EngineerZone®, ADI’s online technical support community:
https://ez.analog.com/community/amplifiers
In analytical measurement applications, light may need to be
monitored over many decades of intensity. This requires a variety
of gain switching networks that often incorporate multiple external
amplifiers and analog switches, which increases the potential for
system errors. The ADA4350 integrates the switching networks and
input amplifier to minimize leakage and allow the switching network
to select up to six externally configurable feedback networks. In
test and measurement systems, the same high measurement accuracy
must be maintained across the gain levels as the user adjusts the
input range of the instrument. For measuring a wider dynamic range,
the ADA4350 is an ideal choice because of its high-impedance/low-Ib
input amplifier and serial port-controlled switch network. The
device also reduces PCB footprint while significantly increasing
channel count without thermal density restrictions.
ADA4350 FET Input AFE Features
- Low noise, low input bias current FET
input amplifier
- 90nV/√Hz at 10 Hz
- 5nV/√Hz at 100 Hz
- Integrated gain switching
- Integrated analog to digital converter
driver
- Differential and single-ended mode
Pricing, Availability and Complementary
Components
Product
ProductionAvailability
Price Each In1,000
Quantities
Packaging ADA4350
NOW $5.73 28-lead TSSOP
Complementary components for the ADA4350 include the AD7960
PULSAR® differential ADC, ADR4540 voltage reference, and ADP7118
and ADP7182 linear regulators.
About Analog Devices
Analog Devices (NASDAQ: ADI) designs and manufactures
semiconductor products and solutions. We enable our customers to
interpret the world around us by intelligently bridging the
physical and digital with unmatched technologies that sense,
measure and connect. Visit http://www.analog.com.
Follow ADI on Twitter at http://www.twitter.com/ADI_News
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at: http://www.analog.com/library/analogDialogue/
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Inc.
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Analog Devices, Inc.Grainne Murphy,
353-61-495540grainne.murphy@analog.comorPorter
NovelliAndrew MacLellan,
617-897-8270andrew.maclellan@porternovelli.com
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