Circuit Note

CN-0582

analog.com

Circuits from the Lab™ circuits from Analog Devices have been designed and built by Analog Devices

engineers. Standard engineering practices have been employed in the design and construction of each circuit,

and their function and performance have been tested and verified in a lab environment at room temperature.

However, you are solely responsible for testing the circuit and determining its suitability and applicability for

your use and application. Accordingly, in no event shall Analog Devices be liable for direct, indirect, special,

incidental, consequential or punitive damages due to any cause whatsoever connected to the use of any

Circuits from the Lab circuits. (Continued on last page)

Rev. A | 1 of 10

Circuits from the Lab

® refer-

ence designs are engineered

and tested for quick and easy

system integration to help

solve today’s analog, mixed-

signal, and RF design chal-

lenges. For more information

and/or support, visit

www.analog.com/CN0582.

Devices Connected/Referenced

Devices Connected/Referenced

ADA4099

50 V, 8 MHz, 1.5 mA per Channel,

Robust, Over-the-Top, Precision

OpAmps

AD9833

Low Power, 12.65 mW, 2.3 V to

5.5 V, Programmable Waveform

Generator

LTC6910

Digitally Controlled Programmable

Gain Amplifier in SOT-23

AD5543

16-Bit DAC in μSOIC-8 Package

ADA4522

55 V, EMI Enhanced, Zero Drift,

Ultralow Noise, Rail-to-Rail Output

Operational Amplifiers

ADG5436

High Voltage Latch-Up Proof, Dual

SPDT Switch

ADA4807

3.1 nV/√Hz, 1 mA, 180 MHz, Rail-

to-Rail Input/Output Amplifier

ADP7118

20 V, 200 mA, Low Noise, CMOS

LDO Linear Regulator

ADA4945

High Speed, ±0.1 μV/˚C Offset Drift,

Fully Differential ADC Driver

ADP7182

–28 V, −200 mA, Low Noise, Linear

Regulator

ADP7142

40 V, 200 mA, Low Noise, CMOS

LDO Linear Regulator

ADG5401

High Voltage Latch-Up Proof, Single

SPST Switch

LT8330

Low IQ Boost/SEPIC/Inverting

Converter with 1 A, 60 V Switch

LTC3112

15 V, 2.5 A Synchronous Buck-Boost

DC/DC Converter

ADP1708

1 A, Low Dropout, CMOS Linear

Regulator

LT3092

200 mA 2-Terminal Programmable

Current Source

ADP5071

2 A/1.2 A DC-to-DC Switching

Regulator with Independent Positive

and Negative Outputs

ADG839

0.35 Ω CMOS 1.65 V to 3.6 V Single

SPDT Switch/ 2:1 MUX

AD5686R

Quad, 16-Bit nanoDAC+ with SPI

Interface

ADG1219

Low Capacitance, Low Charge

Injection, ±15 V/ 12 V iCMOS SPDT

in SOT-23

ADR4540

Ultralow Noise, High Accuracy

4.096 V Voltage Reference

MAX14595 High Speed, Open-Drain Capable

Logic-Level Translator

AD7768-4

Precision 24-Bit, 1024 kSPS,

Sigma-Delta (Σ-Δ) ADC with Power

Scaling

MAX7312

2-Wire-Interfaced 16-Bit I/O Port

Expander with Interrupt and Hot-

Insertion Protection

USB 3.0 Quad-Channel IEPE Vibration Sensor Measurement System

EVALUATION AND DESIGN SUPPORT

►

Circuit Evaluation Boards

►

EVAL-CN0582-USBZ

►

Design and Integration Files

►

Schematics, Layout Files, Bill of Materials, Software

CIRCUIT FUNCTIONS AND BENEFITS

Integrated electronics piezoelectric (IEPE) and IEPE-compatible

accelerometers and velocity sensors are used in a wide array of

condition-based monitoring (CbM), building monitoring, and struc-

tural analysis applications. Often multiple channels are used to

measure 3-dimensional acceleration at a single location, or multiple

1-dimensional measurements at several locations.

Benchtop data acquisition (DAQ) systems are applicable in re-

search and calibration environments, however these usually come

in sizes and at costs that are not conducive for direct integration

into end applications.

The circuit shown in Figure 1 is a self-contained, USB-based quad-

input channel IEPE data acquisition system. The four channels are

simultaneously sampled with 24-bit resolution and have a sample

rate of up to 256 kSPS. The signal chain is dc-coupled, providing

frequency response to 0 Hz, while a dc offsetting circuit maximizes

the dynamic range. Each input channel includes a constant current

source for powering standard IEPE sensors. All data signals and

power rails are derived from a single USB 3.0 connection.

The system also includes an on-board direct digital synthesis (DDS)

signal generator, which can be used for electrical calibration or as

an excitation source to a shaker table or vibration calibrator for

sensor and system-level calibration.

Data can be captured and analyzed with the companion software

application, and custom software can be developed using the

provided application programming interface (API).