Nuremberg Germany March 2017 Simplifying Precision Measurement with ADIs Latest SAR ADC Product Families 1 2017 Analog Devices Inc All rights reserved This Sessions Objective Introduce the ADAQ7980 data acquisition subsystem ID: 729603
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Slide1
Ryan curranEmbedded world 2017Nuremberg, GermanyMarch 2017
Simplifying Precision Measurement with ADI’s Latest SAR ADC Product Families
1
©2017 Analog Devices, Inc. All rights reserved. Slide2
This Sessions ObjectiveIntroduce the ADAQ7980 data acquisition subsystem
SiP (System-in-Package) product familyHow the idea came about
Discuss features & benefitsLearn about how this helps the signal chain designer
AD4000:
Next Generation of Industry Leading 16/18/20-Bit Precision
SAR ADC FamilyEase of use featuresSystem level benefitsAD4020: ADI’s 1st 20-bit, 2MSPS SAR ADCConclusions & Questions
2
Analog Devices Confidential InformationSlide3
ADAQ7980 ADAQ798816-bit SAR ADC-BASED INTEGRATED DATA Acquisition subsystems
©2017 Analog Devices, Inc. All rights reserved.
3Slide4
Common Block Across Varying Applications
REF
Supply +
Supply -
Digital
Host
Sensor
Sensor
Signal
Conditioning
Signal
Conditioning
M
U
X
ADC
Driver
ADC LDO
RC
Filter
Ref
Buf
Bypass
ADAQ7980
4
©2017 Analog Devices, Inc. All rights reserved.
Out-of-Box Performance
More of signal chain covered by data sheet performance
Benefit: Reduced TTM, Lower development cost
5x4
mm footprint
Balance between integration & Flexibility
Benefit: Smaller form factor without comprising performanceSlide5
SiP Project Motivation
Poorly Designed Reference Circuit
SAR makes incorrect
bit decision
due
to poor design
Common
causes
Layout and size of reservoir cap
Insufficient drive strength/high output impedance
Noise of
ref / ref
buffer too
large
Poorly Designed
D
river
C
ircuit
SAR
operation severely degraded due to poor design
Common
causes
Incorrect driver selection / No driver
Incorrect filter bandwidth
Incorrect component choice / component process
We can make these decisions
give our customers a better chance of achieving data sheet performance
Analog Devices Confidential Information
5Slide6
Ease of Use
Flexibility
ADAQ7980 16-Bit, 1MSPS, Data Acquisition Solution
Integrated ADC Driver
High impedance reference buffer and 10uF cap
Integrated RC Filter
Flexible Amp Supplies and Reference Value
Flexible ADC Driver Configuration
LDO with integrated cap for flexible and stable power supply
Flexible Logic Level
Analog Devices Confidential Information
6Slide7
Area Saving Benefits
~50
% area saving in PCB area
vs. a discrete solution
~
160
mm
2
~80
mm
2
AMP
AMP
LDO
ADC
ADAQ7980
Analog Devices Confidential Information
7Slide8
Advanced Assembly
Technology
5 mm × 4 mm
×
2 mm LGA
ADC
LDO
AMP
PassivesSlide9
Performance Results 10 kHz Tone @ 1 MSPS (VREF
= 5V)Discrete Solution vs. Integrated Solution
9
PCB Level Individual Component Solution
ADAQ7980 Integrated Solution
SNR = 91.37 dB
SINAD = 91.09 dB
THD = -103.1 dB
DR = 91.88 dB
SNR = 91.17 dB
SINAD = 90.94 dB
THD = -103.9 dB
DR = 91.64 dB
Analog Devices Confidential InformationSlide10
Models and Pricing
Model
Sample Rate
Book Price
(1k)
ADAQ7988500 ksps$9.75ADAQ7980
1 MSPS$13.25
Available Now
10
©2017 Analog Devices, Inc. All rights reserved. Slide11
AD40XXNext Generation SAR ADC Simplifies Precision Measurement
©2017 Analog Devices, Inc. All rights reserved.
11Slide12
12
Ease of Drive
High-Z
mode
Longer
acquisition phase
Ease-of-Digital Interface
Low
SPI clock rate
R
educe I/O power consumption
Simplify digital
Isolation
Reduced
Sensitivity
to
External
C
ircuitry
Compatible with Larger Selection of Driver Circuits
Optimized Signal Conditioning
Easy to achieve datasheet performance
Reduces design time, debug and risk
Key Benefits
AD40XX
: Next Generation of Industry Leading 16/18/20-Bit Precision SAR ADC Family
©2017 Analog Devices, Inc. All rights reserved.
Pin-For-Pin Compatible with AD798x/769x
AD40XX Power
:
80µW
@
10kSPS, 8mW @ 1MSPSSlide13
AD4020: ADI’s First 20-Bit, 2MSPS Precision SAR Differential ADC
SINAD
100 dB
typ
@ 1 kHz
input, 5V REF
THD
-123 dB typ
@ 1 kHz input
INL
+/-
3.0 ppm max
guaranteed
13
©2017 Analog Devices, Inc. All rights reserved.
Resolution
VREF
VDD
Interface
Input
Package
20
Bits
2.4V to 5.1V
1.8V
SPI
1.8V/2.5V/3V/5V
Differential
±V
REF
10-ld MSOP 3x4.9mm
10-ld LFCSP 3x3mmSlide14
Ease of Drive
Internal Overvoltage Clamp
Efficient Digital Interface
Span Compression
14
AD40XX
: Ease of Use Features
©2017 Analog Devices, Inc. All rights reserved. Slide15
CNV
CONVERSION
ACQ/ TRACK
PHASE
SCK
SDO
ADC INPUT
Traditional SAR
DATA
ADC INPUT HIGH-Z ENABLED
AD4003
CONV
ACQUISITION/ TRACK
DATA
ADC
ADC
DRIVER
VREF
C
DAC
C
DAC
+
_
VREF
+
_
R
R
C
C
C
Ease
of
Drive
©2017 Analog Devices, Inc. All rights reserved. Slide16
AD4003 vs AD7982 Driver Comparison: SNR (Fs = 1MSPS, fin = 1kHz)
16
Analog Devices Confidential Information—Not for External Distribution ©2016 Analog Devices, Inc. All rights reserved.
R (
Ω
)
, C(F) and RC Bandwidth(Hz)
Higher performance even with longer settling times
BetterSlide17
AD40XX Family Release Schedule
17
Generic
Description
Resolution,
Speed, Ain input [package]Target Release Timelines(as of March 2017)
Pricing (1K)
AD4000
16-Bit, 2MSPS, SE [MSOP,
CSP]
Released
$14.35
AD4001
16-Bit, 2MSPS, DIFF [MSOP,
CSP]
Released
$15.45
AD4002
18-Bit, 2MSPS, SE [MSOP,
CSP]
July 2017
AD4003
18-Bit, 2MSPS,DIFF [MSOP,
CSP]
Released
$24.95
AD400416-Bit, 1MSPS,SE [MSOP, CSP]April 2017
AD400516-Bit, 1MSPS,DIFF [MSOP, CSP]April 2017
AD4006
18-Bit, 1MSPS,SE [MSOP, CSP]October 2017
AD400718-Bit, 1MSPS,DIFF [MSOP, CSP]
July 2017AD4008
16-Bit, 500kSPS,SE [CSP]January 2018AD401018-Bit, 500kSPS,SE [CSP]January 2018AD401118-Bit, 500kSPS,DIFF [CSP]October 2017AD402020-Bit, 2MSPS,DIFF [MSOP, CSP]April 2017$29.50
©2017 Analog Devices, Inc. All rights reserved. Slide18
ConclusionIntroduced ADAQ7980 data acquisition subsystem
SiP (System-in-Package) family
Provides greater than 50% reduction in PCB area compared with individual component solutionsCircuit performance has NOT been compromised due to SiP
integration
With more of the signal chain covered by
one data sheet, the risk of redesign is reduced ADI offers a full suite of evaluation tools and design resources intended to create an easy customer journey for the ADAQ7980AD400x: Next Generation of Industry Leading Precision SAR ADCs
Pin-for-pin compatible with AD798x/AD769x product familiesFamily includes the AD4020 – ADI’s first 20-bit SAR ADC
Reduces system & signal chain complexity
Improved measurement accuracy in a small footprint
18
©2017 Analog Devices, Inc. All rights reserved. Slide19
70 mm
6
0 mm
Conclusion
Both product families are available for
purchase and you can see them in action at booth 3-311!!!
19
©2017 Analog Devices, Inc. All rights reserved.
ADAQ7980
AD400xSlide20
20
QUESTIONS
©2017 Analog Devices, Inc. All rights reserved.