ADA4841-1

PRODUCTION

Low Power, Low Noise and Distortion, Rail-to-Rail Output Amplifier

Data Sheet (Rev. G) Product Selection Table
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Overview

  • Low power: 1.1 mA/amp
  • Low wideband noise
    • 2.1 nV/√Hz
    • 1.4 pA/√Hz
  • Low 1/f noise
    • 7 nV/√Hz @ 10 Hz
    • 13 pA/√Hz @ 10 Hz
  • Low distortion: −105 dBc @ 100 kHz, VO = 2 V p-p
  • High speed
    • 80 MHz, −3 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

The ADA4841-1 is a unity gain stable, low noise and distortion, rail-to-rail output amplifier that has a quiescent current of 1.5 mA maximum. In spite of its low power consumption, this amplifier offers low wideband voltage noise performance of 2.1 nV/√Hz and 1.4 pA/√Hz current noise, along with excellent spurious-free dynamic range (SFDR) of −105 dBc at 100 kHz. To maintain a low noise environment at lower frequencies, the amplifier has low 1/f noise of 7 nV/√Hz and 13 pA/√Hz at 10 Hz.

The ADA4841-1 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 can drive up to 10 pF of capacitive load with minimal peaking.

The ADA4841-1 provides the performance required to efficiently support emerging 16-bit to 18-bit ADCs and is ideal for portable instrumentation, high channel count, industrial measurement, and medical applications. The ADA4841-1 is ideally suited to drive the AD7685/AD7686, 16-bit PulSAR ADCs.

The ADA4841-1 package features RoHS compliant lead finishes. The amplifier is rated to work over the industrial temperature range (−40°C to +125°C).

Applications

  • Low power, low noise signal processing
  • Battery-powered instrumentation
  • 16-bit PulSAR® ADC drivers
ADA4841-1
Low Power, Low Noise and Distortion, Rail-to-Rail Output Amplifier
ADA4841-1 Pin Configuration ADA4841-1 Pin Configuration ADA4841-1 Circuit Diagram ADA4841-1 Circuit Diagram
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Documentation

Data Sheet 1

User Guide 2

Application Note 4

Technical Articles 1

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Software Resources

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Hardware Ecosystem

Parts Product Life Cycle Description
ADA4805-1
RECOMMENDED FOR NEW DESIGNS 0.2 µV/°C Offset Drift, 105 MHz Low Power, Low Noise, Rail-to-Rail Amplifier
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Tools & Simulations

LTspice

Models for the following parts are available in LTspice:

  • ADA4841

Precision ADC Driver Tool

The Precision ADC Driver Tool is a web application that simulates the performance of precision ADC and driver combinations. Potential issues with driver selection, kickback settling, and distortion are flagged, and design tradeoffs can be quickly evaluated. Simulations and calculations include system noise, distortion, and settling of the ADC input

Open Tool

VRMS/dBm/dBu/dBV calculators

A utility to convert between standard units of power measurement and signal strength.

Open Tool

Power Dissipation vs Die Temp

This tool estimates die temperature and power dissipation based on the supply voltages, ambient temperature, load characteristics, and package thermal data.

Open Tool

Analog Photodiode Wizard

Use Photodiode Wizard to design a transimpedance amplifier circuit to interface with a photodiode. Select a photodiode from the library included in the tool, or enter custom photodiode specifications. Quickly observe tradeoffs between Bandwidth, Peaking (Q), and ENOB/SNR. Modify circuit parameters, and immediately see results in plots for pulse response, frequency response, and noise gain.

Open Tool

Analog Filter Wizard

Use the Analog Filter Wizard to design low-pass, high-pass, or band-pass filters with actual op amps in minutes. As you progress through the design process, you can observe the characteristics of your filter design from ideal specifications to real world circuit behavior. Quickly evaluate the tradeoffs in op amp specifications - including gain-bandwidth, noise, and supply current – to determine the best filter design for your requirements.

Open Tool

Signal Chain Designer

Signal Chain Designer is a web-based tool designed to create and simulate complex precision signal chains. See your circuit’s performance before you commit to your PCB: transfer function, noise, power consumption, input range, and DC error. Quickly experiment with different parts and architectures. Signal chains can be exported to LTspice for further analysis.

Open Tool

SPICE Model 1

LTspice

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.

Evaluation Kits

eval board
schematic 1
schematic 2
schematic 3
schematic 4
EVAL-AD7768-4

AD7768-4 Evaluation Board

Buy Now View Details

Features and Benefits

  • Full featured evaluation board for the AD7768-4
  • PC control in conjunction with the SDP-H1 system demonstration platform (EVAL-SDP-CH1Z)
  • PC software control and data analysis
  • Time and frequency domain
  • Standalone hardware capability

Product Details

The EVAL-AD7768-4FMCZ evaluation kit features the AD7768-4 24-bit, 256 kSPS, analog-to-digital converter (ADC). A 7 V to 9 V external bench top supply is regulated to 5 V and 3.3 V to supply the AD7768-4 and support components. The EVAL-AD7768-4FMCZ board connects to the USB port of the PC via a connection to the EVAL-SDP-CH1Z motherboard.

The AD7768-4 evaluation software fully configures the AD7768-4 device register functionality and provides dc and ac time domain analysis in the form of waveform graphs, histograms, and associated noise analysis for ADC performance evaluation.

The EVAL-AD7768-4FMCZ is an evaluation board that allows the user to evaluate the features of the ADC. The user PC software executable controls the AD7768-4 over a USB cable through the EVAL-SDP-CH1Z system demonstration platform (SDP).

Full specifications on the AD7768-4 are available in the product data sheet, which should be consulted in conjunction with this user guide when working with the evaluation board.

eval board
schematic 5
schematic 6
schematic 7
EVAL-AD7761

AD7761 Evaluation Board

Buy Now View Details

Features and Benefits

  • Full featured evaluation board for the AD7761
  • PC control in conjunction with the SDP-H1 system demonstration platform (EVAL-SDP-CH1Z)
  • PC software control and data analysis
  • Time and frequency domain
  • Standalone hardware capability

Product Details

The EVAL-AD7761FMCZ evaluation kit features the AD7761 16-bit, 256 kSPS, analog-to-digital converter (ADC). A 7 V to 9 V external bench top supply is regulated to 5 V and 3.3 V to supply the AD7761 and support components. The EVAL-AD7761FMCZ board connects to the USB port of the PC via a connection to the EVAL-SDP-CH1Z motherboard.

The AD7761 evaluation software fully configures the AD7761 device register functionality and provides dc and ac time domain analysis in the form of waveform graphs, histograms, and associated noise analysis for ADC performance evaluation.

The EVAL-AD7761FMCZ is an evaluation board that allows the user to evaluate the features of the ADC. The user PC software executable controls the AD7761 over a USB cable through the EVAL-SDP-CH1Z system demonstration platform (SDP).

Full specifications for the AD7761 are available in the product data sheet, which should be consulted in conjunction with this user guide when working with the evaluation board.

EVAL-HSAMP-1

Universal Evaluation Board for Single High Speed Operational Amplifiers

Buy Now View Details

Features and Benefits

  • Enables quick breadboarding/prototyping
  • User defined circuit configuration
  • Edge mounted Subminiature Version A (SMA) connector
  • provisions Easy connection to test equipment and other circuits

Product Details

The Universal Single High Speed Amplifier Evaluation Boards are bare boards that enable users to quickly prototype a variety of amplifier circuits, which minimizes risk and reduces time to market. These boards are all RoHs Compliant. See ordering guide below on what board to order by lead count and package.

Resources

eval board
schematic 8
schematic 9
schematic 10
schematic 11
schematic 12
EVAL-AD7768

AD7768 Evaluation Board

Buy Now View Details

Features and Benefits

  • Full featured evaluation board for the AD7768
  • PC control in conjunction with the SDP-H1 System Demonstration Platform (EVAL-SDP-CH1Z)
  • PC software control and data analysis 
  • Time and frequency domain
  • Standalone hardware capability

Product Details

The EVAL-AD7768FMCZ evaluation kit features the AD7768 24-bit, 256 kSPS, analog-to-digital converter (ADC). A 7 V to 9 V external bench top supply is regulated to 5 V and 3.3 V to supply the AD7768 and support components. The EVAL-AD7768FMCZ board connects to the USB port of the PC via a connection to the EVAL-SDP-CH1Z motherboard.

The AD7768 evaluation software fully configures the AD7768 device register functionality and provides dc and ac time domain analysis in the form of waveform graphs, histograms, and associated noise analysis for ADC performance evaluation.

The EVAL-AD7768FMCZ is an evaluation board that allows the user to evaluate the features of the ADC. The user PC software executable controls the AD7768 over a USB cable through the EVAL-SDP-CH1Z System Demonstration Platform (SDP). The AD7768 evaluation software requires PC running Windows® 7 to Windows 10 with a USB 2.0 port.

Full specifications on the AD7768 are available in the product data sheet, which should be consulted in conjunction with this user guide when working with the evaluation board.

EVAL-AD7768-4
AD7768-4 Evaluation Board
EVAL-AD7768-4FMCZ SDP-H1 evaluation board layout EVAL-AD77648-4 Evaluation software main window AD7768 Power THD Combinations
EVAL-AD7761
AD7761 Evaluation Board
EVAL-AD7761FMCZ - Angle View EVAL-AD7761FMCZ - Bottom View EVAL-AD7761FMCZ - Top View
EVAL-HSAMP-1
Universal Evaluation Board for Single High Speed Operational Amplifiers
EVAL-AD7768
AD7768 Evaluation Board
EVAL-AD7768FMCZ SDP-H1 evaluation board layout EVAL-AD7768FMCZ Sample Board Configuration EVAL-AD7768FMCZ Sample FFT AD7768 Power THD Combinations

Reference Designs

Basic Single-Ended, Low Voltage, Low Power, 16-Bit, 100 kSPS ADC Solution
Basic Single-Ended, Low Voltage, Low Power, 16-Bit, 100 kSPS ADC Solution
CN0255 Circuits from the lab

16-Bit, 100 kSPS, Single Supply, Low Power Data Acquisition System

View Detailed Reference Design

Features and Benefits

  • 16-bit, 100KSPS Data Acquisiton
  • Single Supply
  • 8mW Total Power
CN0255
16-Bit, 100 kSPS, Single Supply, Low Power Data Acquisition System
Basic Single-Ended, Low Voltage, Low Power, 16-Bit, 100 kSPS ADC Solution

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