ADA4945-1
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ADA4945-1

High Speed, ±0.1 µV/˚C Offset Drift, Fully Differential ADC Driver

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Info : RECOMMENDED FOR NEW DESIGNS tooltip
Info : RECOMMENDED FOR NEW DESIGNS tooltip
Part Details
Part Models 3
1ku List Price Starting From $2.25
Features
  • Broad power supply range: 3 V to 10 V
  • Wide input common-mode voltage range: −VS to +VS − 1.3 V
  • Rail-to-rail output
  • Fully specified dual power mode operation
    • 4 mA full power mode (145 MHz)
    • 1.4 mA low power mode (80 MHz)
  • Full power mode
    • Low harmonic distortion
    • −133 dBc HD2 and −140 dBc HD3 at 1 kHz
    • −133 dBc HD2 and −116 dBc HD3 at 100 kHz
  • Fast settling time
    • 18-bit: 100 ns
    • 16-bit: 50 ns
  • Input voltage noise: 2.0 nV/√Hz, f = 100 kHz
  • ±115 μV maximum offset voltage from −40°C to +125°C
  • Adjustable output clamps for ADC input protection
Additional Details
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The ADA4945-1 is a low-noise, low-distortion, fully differential amplifier with two selectable power modes. The device operates over a broad power supply range of 3 V to 10 V. The low DC offset, DC offset drift, and excellent dynamic performance of the ADA4945-1 make it well suited for a variety of data acquisition and signal processing applications. The device is an ideal choice for driving high-resolution, high-performance successive approximation register (SAR) and Σ-Δ analog-to-digital converters (ADCs) on 4 mA of quiescent current (full power mode). The device can also be selected to operate on 1.4 mA of quiescent current (low power mode) to scale the power consumption to the desired performance necessary for an ADC drive application. The adjustable common-mode voltage allows the ADA4945-1 to match the input common-mode voltage of multiple ADCs. The internal common-mode feedback loop provides exceptional output balance, as well as suppression of even order harmonic distortion products.

With the ADA4945-1, differential gain configurations are achieved with a simple external feedback network of four resistors determining the closed-loop gain of the amplifier. The ADA4945-1 is fabricated using Analog Devices, Inc., proprietary, silicon germanium (SiGe), complementary bipolar process, enabling the device to achieve low levels of distortion with an input voltage noise of only 2.0 nV/√Hz (full power mode).

The ADA4945-1 is available in a RoHS-compliant, 3 mm × 3 mm, 16-lead LFCSP package. It is specified to operate from −40°C to +125°C.

Applications

  • Low power Σ-Δ, PulSAR®, and SAR ADC drivers
  • Single-ended to differential converters
  • Differential buffers
  • Medical imaging
  • Process control
  • Portable electronics
Part Models 3
1ku List Price Starting From $2.25

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Documentation

Documentation

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Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
ADA4945-1ACPZ-R2
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ADA4945-1ACPZ-R7
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ADA4945-1ACPZ-RL
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Product Lifecycle

PCN

May 6, 2024

- 24_0001

ADA4945-1 Data Sheet Correction

ADA4945-1ACPZ-R2

PRODUCTION

ADA4945-1ACPZ-R7

PRODUCTION

ADA4945-1ACPZ-RL

PRODUCTION

Nov 17, 2021

- 21_0246

ADA4945-1 Die Revision

ADA4945-1ACPZ-R2

PRODUCTION

ADA4945-1ACPZ-R7

PRODUCTION

ADA4945-1ACPZ-RL

PRODUCTION

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Part Models

Product Lifecycle

PCN

May 6, 2024

- 24_0001

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ADA4945-1 Data Sheet Correction

ADA4945-1ACPZ-R2

PRODUCTION

ADA4945-1ACPZ-R7

PRODUCTION

ADA4945-1ACPZ-RL

PRODUCTION

Nov 17, 2021

- 21_0246

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ADA4945-1 Die Revision

ADA4945-1ACPZ-R2

PRODUCTION

ADA4945-1ACPZ-R7

PRODUCTION

ADA4945-1ACPZ-RL

PRODUCTION

Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 5

reference details image

EVAL-AD4030-24

AD4030-24 Evaluation Board, Precision Single Channel 24-Bit SAR ADC

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EVAL-AD4030-24

AD4030-24 Evaluation Board, Precision Single Channel 24-Bit SAR ADC

AD4030-24 Evaluation Board, Precision Single Channel 24-Bit SAR ADC

Features and Benefits

  • On-board voltage reference, clock source, and ADC drivers
  • Versatile analog signal conditioning circuitry
  • FMC-LPC system board connector
  • ACE PC software for configuration and data analysis (time and frequency domain)
  • Compatible with other off-the-shelf controller boards

Product Detail

The EVAL-AD4030-24FMCZ evaluation board enables quick and easy evaluation of the AD4030 family of 24-bit precision successive approximation register (SAR) analog-to-digital converters (ADCs).

The AD4030-24 is a low power, 24-bit precision SAR ADC that supports up to 2 MSPS. The evaluation board demonstrates the performance of the AD4030-24 and provides a configurable analog front end (AFE) for a variety of system applications.

The EVAL-AD4030-24FMCZ evaluation board is designed for use with the Digilent ZedBoard. The ZedBoard is used to control data capture and buffering. The evaluation board connects to the ZedBoard board via a field-programmable gate array (FPGA) mezzanine card (FMC) low pin count (LPC) connector. The ZedBoard hosts a Xilinx Zynq7000 SoC, which has two processor cores and programmable FPGA fabric. The ZedBoard connects to the PC through USB.

The evaluation board includes:

  • A high precision buffered band gap 5 volt reference (LTC6655).
  • An analog front end (AFE) that provides signal conditioning and drive for the AD4030-24. The AFE can be configured to use either the ADA4896-2 in a dual buffer configuration, or the ADA4945-1, a fully differential amplifier.
  • An optional 100 MHz clock source that provides a reference clock for the FPGA and ADC.
  • Full power supply solution that provides all the necessary voltage rails from a 12 volt supply that is provided from the ZedBoard through the FMC connector.

Full descriptions of these products are available in their respective data sheets, which should be consulted when using the evaluation board.

APPLICATIONS

  • Automatic test equipment
  • Digital control loops
  • Medical instrumentation
  • Seismology
  • Semiconductor manufacturing
  • Scientific instrumentation
reference details image

EVAL-ADMX1002

Ultra-low Distortion Signal Generator Measurement Module

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EVAL-ADMX1002

Ultra-low Distortion Signal Generator Measurement Module

Ultra-low Distortion Signal Generator Measurement Module

Features and Benefits

  • Ultra-low distortion, high-resolution source
    • DC, 50Hz to 40kHz Frequency Range
    • Proprietary digital pre-distortion (DPD) algorithm
    • –130dBc THD @ 1kHz (typ.)
    • Arbitrary waveform generation (AWG) with on-board pattern memory
    • Differential (balanced) output up to 3.6VRMS
  • Fast pattern switching between multiple stored waveforms
  • Small form-factor (60mm x 40mm)
  • Low power, 1W typ. (quiescent)
  • SPI interface for integration into test and measurement systems

Product Detail

The ADMX1002 is an ultra-low distortion sinewave and high-resolution arbitrary waveform generator. This high-performance module demonstrates a proprietary digital pre-distortion algorithm that reduces signal distortion below levels that can be achieved with high-performance digital-to-analog converters (DAC) and amplifiers alone. Its differential output can be set to common-mode levels often required to test high-performance analog-to-digital converters (ADC), audio codecs, and other audio ICs and systems. With an easy-to-use SPI interface and small-form factor, the ADMX1002 can be easily embedded into test systems, or simply used on the bench for measurement and characterization.

APPLICATIONS

  • High-end audio test
  • Analog-to-digital converter characterization and test
  • Sensor and transducer test
  • Frequency response and network analysis
  • ATE
reference details image

EVAL-AD4630-24

AD4630-24 SAR ADC Evaluation Board

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EVAL-AD4630-24

AD4630-24 SAR ADC Evaluation Board

AD4630-24 SAR ADC Evaluation Board

Features and Benefits

  • On-board voltage reference, clock source, and ADC drivers
  • Versatile analog signal conditioning circuitry
  • FMC-LPC system board connector
  • ACE PC software for configuration and data analysis (time and frequency domain)
  • Compatible with other off-the-shelf controller boards

Product Detail

The EVAL-AD4630-24FMCZ evaluation board enables quick and easy evaluation of the AD4630 family of 24-bit precision successive approximation register (SAR) analog-to-digital converters (ADCs).

The AD4630-24 is a low power, 24-bit, 2-channel, 24-bit precision SAR ADC that supports up to 2 MSPS per channel. The evaluation board demonstrates the performance of the AD4630-24 and provides a configurable analog front end (AFE) for a variety of system applications.

The EVAL-AD4630-24FMCZ evaluation board is designed for use with the Digilent ZedBoard. The ZedBoard is used to control data capture and buffering. The evaluation board connects to the ZedBoard board via a field-programmable gate array (FPGA) mezzanine card (FMC) low pin count (LPC) connector. The ZedBoard hosts a Xilinx Zynq7000 SoC, which has two processor cores and programmable FPGA fabric. The ZedBoard connects to the PC through USB.

APPLICATIONS

  • Automatic test equipment
  • Digital control loops
  • Medical instrumentation
  • Seismology
  • Semiconductor manufacturing
  • Scientific instrumentation
reference details image

EVAL-ADA4945-1

ADA4945-1 Evaluation Board

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EVAL-ADA4945-1

ADA4945-1 Evaluation Board

ADA4945-1 Evaluation Board

Features and Benefits

  • Enables quick breadboarding and prototyping
  • User defined circuit configuration

Product Detail

The Analog Devices, Inc., ADA4945-1CP-EBZ evaluation board allows the user to evaluate the performance of the ADA4945-1 fully differential amplifier. The ADA4945-1CP-EBZ evaluation board can be configured to accept either a single-ended or differential input signal.

The ADA4945-1CP-EBZ evaluation board uses several 2-pin and 3-pin headers to control various features of the ADA4945-1. Apply the proper jumpers to set the ADA4945-1 high and low output clamp levels, set the ADA4945-1 output common-mode voltage, choose high or low power mode for the ADA4945-1, and set the ADA4945-1 digital ground level.

Optimized power and ground planes ensure low noise and high speed operation. Component placement and power supply bypassing provide maximum circuit flexibility and performance. The ADA4945-1CP-EBZ evaluation board accepts 0402 surface mount technology (SMT) components, 0805 bypass capacitors, and 2.54 mm headers.

Input and output signals are brought to and from the board via 50 Ω, side launch Subminiature Version A (SMA) connectors.

Full specifications on the ADA4945-1 are available in the ADA4945-1 data sheet. Consult the data sheet in conjunction with this user guide when working with the ADA4945-1CP-EBZ evaluation board.

reference details image

EVAL-ADMX1001

Ultra-low Distortion Signal Generator Measurement Module

zoom

EVAL-ADMX1001

Ultra-low Distortion Signal Generator Measurement Module

Ultra-low Distortion Signal Generator Measurement Module

Features and Benefits

  • Ultra-low distortion, high-resolution source
    • DC, 50Hz to 40kHz Frequency Range
    • Proprietary digital pre-distortion (DPD) algorithm
    • –130dBc THD @ 1kHz (typ.)
    • Arbitrary waveform generation (AWG) with on-board pattern memory
    • Differential (balanced) output up to 3.5VRMS
    • Fast pattern switching between multiple stored waveforms
  • Fully Differential input Acquisition Channel
  • Small form-factor (60mm x 40mm)
  • Low power, 1W typ. (quiescent)
  • SPI interface for integration into test and measurement systems

Product Detail

The ADMX1001 is an ultra-low distortion sinewave and high-resolution arbitrary waveform generator with an acquisition channel. This high-performance module demonstrates a proprietary digital pre-distortion algorithm that reduces signal distortion below levels that can be achieved with high-performance digital-to-analog converters (DAC) and amplifiers alone. Its differential output can be set to common-mode levels often required to test high-performance analog-to-digital converters (ADC), audio codecs, and other audio ICs and systems. The signal generator and the acquisition channel can be individually controlled using separate, easy to use, SPI interfaces - combined with the module's small-form factor, the ADMX1001 can be easily embedded into test systems, or simply used on the bench for measurement and characterization.

APPLICATIONS

  • High-end audio test
  • Analog-to-digital converter characterization and test
  • Sensor and transducer test
  • Frequency response and network analysis
  • ATE
Tools & Simulations

Tools & Simulations 4

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.

Reference Designs

Reference Designs 5

Figure 1. CN0577 Simplified Block Diagram

Analog Front End and Digital Interface for Serial LVDS SAR ADCs

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CN0577

Analog Front End and Digital Interface for Serial LVDS SAR ADCs

CN0577

Circuits from the lab

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Analog Front End and Digital Interface for Serial LVDS SAR ADCs

Features and Benefits

  • 18-Bit Resolution, 15 MSPS Data Acquisition System
  • Arbitrary Voltage Inputs Supported
  • All Clocking and Power Requirements are Onboard
  • FMC Connector for FPGA Interfacing
View Detailed Reference Design external link

Design & Integration Tools

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Figure 1. CN0579 Simplified Block Diagram

Quad-Channel IEPE Vibration Sensor Measurement System

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CN0579

Quad-Channel IEPE Vibration Sensor Measurement System

CN0579

Circuits from the lab

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Quad-Channel IEPE Vibration Sensor Measurement System

Features and Benefits

  • Quad Channel IEPE-Compatible Vibration Sensor Interface
  • Channel Independent Excitation Source and Sensor Bias Removal Circuitry
  • Analog Overvoltage and Undervoltage Protection
  • Sensor Frequency Response from DC up to 54 kHz
  • Synchronized, Full Bandwidth Data Measurement and Capture
View Detailed Reference Design external link

Design & Integration Tools

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23.87 M

Simplified Circuit Diagram

High Performance, Alias Free Measurement Platform for Flexible Data Acquisition System

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CN0535

High Performance, Alias Free Measurement Platform for Flexible Data Acquisition System

CN0535

Circuits from the lab

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High Performance, Alias Free Measurement Platform for Flexible Data Acquisition System

Features and Benefits

  • Alias free Measurement System
  • Optimized for AC & DC Performance
  • Wide Analog Input (+/-12V)
  • FMC Compatible Form Factor
View Detailed Reference Design external link

Design & Integration Tools

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ZIP

1.88 M

Videos

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Nov 04, 2021

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CN0535 Mbed Example Program Setup

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Nov 16, 2021

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CN0535 Unboxing and Getting Started Video

Condition-Based Monitoring Signal Chain for an IEPE Piezoelectric Vibration Sensor

24-Bit Data Acquisition System for IEPE Sensors

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cn0540

24-Bit Data Acquisition System for IEPE Sensors

cn0540

Circuits from the lab

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24-Bit Data Acquisition System for IEPE Sensors

Features and Benefits

  • IEPE compatible data acquisition system
  • Piezo and MEMs sensors
  • 54 kHz analog input bandwidth
  • Arduino form factor compatible
View Detailed Reference Design external link

Design & Integration Tools

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3.77 M

Videos

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Jan 29, 2021

02:43

CN0549 - CbM Development Platform

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Sep 21, 2022

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Easily Connect Sensors with ADI's Robust Industrial Signal Chains

Figure 1. CN0582 Simplified System Block Diagram

USB 3.0 Quad-Channel IEPE Vibration Sensor Measurement System

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CN0582

USB 3.0 Quad-Channel IEPE Vibration Sensor Measurement System

CN0582

Circuits from the lab

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USB 3.0 Quad-Channel IEPE Vibration Sensor Measurement System

Features and Benefits

  • 4-Channels of Analog Input
  • IEPE, 4-20mA Sensor Compatible
  • Frequency Generator Output
View Detailed Reference Design external link

Design & Integration Tools

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11.22 M

Videos

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Mar 07, 2023

01:00

CN0582: USB 3.0 Quad-Channel IEPE Vibration Sensor Measurement System​

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