MAX6126

PRODUCTION

Ultra-High-Precision, Ultra-Low-Noise, Series Voltage Reference

Ultra-High-Precision, Ultra-Low-Noise, Series Voltage Reference Features 3ppm/°C (max) Temperature Coefficients and an Excellent ±0.02% (max) Initial Accuracy

Data Sheet (Rev. 9) Product Selection Table
Part Models
44
1ku List Price
Starting From $3.54
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Part Details

  • Ultra-Low 1.3µVP-P Noise (0.1Hz to 10Hz, 2.048V Output)
  • Ultra-Low 3ppm/°C (max) Temperature Coefficient
  • ±0.02% (max) Initial Accuracy
  • Wide (VOUT + 200mV) to 12.6V Supply Voltage Range
  • Low 200mV (max) Dropout Voltage
  • 380µA Quiescent Supply Current
  • 10mA Sink/Source-Current Capability
  • Stable with CLOAD = 0.1µF to 10µF
  • Low 20ppm/1000hr Long-Term Stability
  • 0.025Ω (max) Load Regulation
  • 20µV/V (max) Line Regulation
  • Force and Sense Outputs for Remote Sensing
MAX6126
Ultra-High-Precision, Ultra-Low-Noise, Series Voltage Reference
MAX6126: Typical Operating Circuit
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Documentation

Data Sheet 1

Reliability Data 1

User Guide 15

Application Note 1

Design Note 9

Technical Articles 10

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Hardware Ecosystem

Parts Product Life Cycle Description
Series Voltage References 4
MAX6133
PRODUCTION 3ppm/°C, Low-Power, Low-Dropout Voltage Reference
MAX6225
PRODUCTION Low-Noise, Precision, +2.5V/+4.096V/+5V Voltage References
MAX6241
PRODUCTION Low-Noise, Precision, +2.5V/+4.096V/+5V Voltage References
MAX6250
PRODUCTION Low-Noise, Precision, +2.5V/+4.096V/+5V Voltage References
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Tools & Simulations

SPICE Model 5

Evaluation Kits

MAXSANTAFEEVSYS

Evaluation Kit for the MAXREFDES5 4-Channel Analog Front End

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Features and Benefits

  • Self-Contained Easy Evaluation Kit for MAXREFDES5
  • Optimized AFE with Common Analog Input Ranges
  • Small Form Factor Test Platform
  • All Relevant Reference Design Files Included

Product Details

The MAXSANTAFEEVSYS kit allows users to quickly demonstrate and evaluate the functionality of the MAXREFDES5 4-channel 16-bit, isolated analog front end (AFE) reference design without the need for a bench power supply, signal generator equipment, or Xilinx development kit. The reference design board connects to a PC through an included USB-to-SPI adapter that provides both power and data communication to the board. To test the AFE reference design, a USB-powered signal generator board utilizing one of Maxim’s digital-to-analog converters (DAC) is also included. A Windows®-based graphical user interface (GUI) communicates with the boards for generating various analog signal test patterns and simplified access to AFE measurement data. 

The MAXREFDES5 reference design is a 4-channel analog front end (AFE) that accepts -10V to +10V, 0V to 10V, and 4–20mA current loop signals. The design integrates a 16-bit ADC with multirange input programmability (MAX1301) plus low-noise, high-impedance analog buffers (MAX9632) on two of the input channels and an ultra-high precision 4.096V voltage reference (MAX6126) to achieve maximum performance from the 16-bit system. A 600VRMS digital isolator (MAX14850) and 3W transformer driver (MAX256) provide the necessary isolated data and power connections to the host system. LDO regulators (MAX1659) provide regulated +12V, -12V, and 5V power rails to the analog front end.

EV Kit Contents
  • MAXREFDES5 4-Channel AFE Board
  • USB2PMB1 USB to Pmod™ Type 2A Adapter Board
  • MAX5216DACLITE Signal Generator Board
  • Two (2) Wires with Hook Clips (1 Red and 1 Black)
  • Two (2) USB Type A Male to USB Type B Mini Cables
  • USB Flash Drive with Documentation, GUI Applications, and USB Drivers

 

Applications

  • Industrial Data Acquisition
  • Programmable Automation Controllers (PAC)
  • Programmable Logic Controllers (PLC)
  • Proportional-Integral-Derivative (PID) Controllers
MAXSANTAFEEVSYS
Evaluation Kit for the MAXREFDES5 4-Channel Analog Front End

Reference Designs

MAXREFDES38
MAXREFDES38
MAXREFDES38 System Block Diagram
MAXREFDES38 Circuits from the lab

MAXREFDES38#: ECT/EPT Current Fault Sensor

View Detailed Reference Design

Features and Benefits

  • High accuracy
  • Low power
  • Accepts 3VP-P single-ended signal or 6VP-P differential signal
  • Optimized layout and size
  • Device drivers
  • Example C source code
  • Test data
MAXREFDES60
MAXREFDES60
This single channel analog output reference design is in the micro PLC form factor. The on-board microcontroller controls a 16-bit DAC to produce a high accuracy 0-10V output. The design features isolated power and data.
MAXREFDES60 Circuits from the lab

16-Bit Analog Output Micro PLC

View Detailed Reference Design

Features and Benefits

  • High accuracy
  • 0 to 10V voltage output with ±20% overrange
  • Isolated power and data
  • Micro PLC form factor
  • Device drivers
  • Example C source code
  • Test data
MAXREFDES46
MAXREFDES46
MAXREFDES46-Fig01
MAXREFDES46 Circuits from the lab

4-Channel Analog Input/Output

View Detailed Reference Design

Features and Benefits

Features

  • Programmable high-accuracy current/voltage output
  • High accuracy
  • ±10V, 0 to 10V, and 4–20mA Inputs
  • Current output drives 0 to 1kΩ
  • Voltage output drives loads down to 1kΩ
  • Extensive error reporting
  • Isolated power and data
  • Device drivers
  • Example C source code

Competitive Advantages

  • Flexibility
  • System safety
  • Small solution size

Applications

  • PLCs
  • DCS
  • Distributed I/Os
  • Embedded systems
  • Industrial control and automation
MAXREFDES77 Connected to Munich Board
MAXREFDES77 Connected to Munich Board
MAXREFDES77
MAXREFDES77 Circuits from the lab

Dual-Channel Current Sense Peripheral Module

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Features and Benefits

  • 2.7V to 76V Input Common Mode
  • Low 12μV (max) Input Offset Voltage
  • Low 0.1% (max) Gain Error
  • Gain = 20V/V and 100V/V
  • RoHS Compliant
  • Proven PCB Layout
  • Fully Assembled and Tested
MAXREFDES32
MAXREFDES32
MAXREFDES32 - Design Block Diagram
MAXREFDES32 Circuits from the lab

2-Channel Analog Input/Analog Output with Flyback DC-DC

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Features and Benefits

  • Two independent analog inputs
  • Two independent analog outputs
  • Isolated power and data
  • High-speed 400ksps analog input sampling rate
  • High-accuracy 16-bit resolution
  • Voltage output settles to within 2 LSB in 17µs
  • Current output settles to within 2 LSB in 77µs
  • Device drivers
  • Example C source code
  • Configuration files for ZedBoard™ platform
  • FMC-compatible
MAXREFDES61 - Block Diagram
MAXREFDES61 - Block Diagram
MAXREFDES61
MAXREFDES61 Circuits from the lab

16-Bit Four-Channel Analog Input Micro PLC Card

View Detailed Reference Design

Features and Benefits

  • High accuracy
  • -10 to +10V ±20% voltage inputs
  • 4 to 20mA +20% current inputs
  • Isolated power and data
  • Micro PLC form factor
  • Device drivers
  • Example C source code
  • Test data
MAXREFDES75
MAXREFDES75
MAXREFDES75 System Block Diagram
MAXREFDES75 Circuits from the lab

MAXREFDES75#: 24-Bit Weigh Scale with a 16-Bit DAC, 0 to 10V Output

View Detailed Reference Design

Features and Benefits

  • Ratiometric measurement or measurement compared to a precision voltage reference
  • User-programmable offset and gain calibration for sensor (load cell)
  • User-programmable offset and gain calibration for DAC
  • User-programmable voltage output range mapping
MAXREFDES30
MAXREFDES30
MAXREFDES30
MAXREFDES30 Circuits from the lab

8-Channel Simultaneous-Sampling Analog Front End

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Features and Benefits

  • High precision, 8-channel, simultaneous-sampling inputs
  • High-speed 250ksps sampling rate
  • High-accuracy 16-bit resolution
  • Device drivers
  • Example C source code
  • Configuration files for ZedBoard™ platform
  • FMC-compatible
MAXREFDES11 - Block Diagram
MAXREFDES11 - Block Diagram
MAXREFDES11
MAXREFDES11 (Fresno) Circuits from the lab

16-Bit High-Accuracy 0 to 10V Input Isolated Analog Front End (AFE)

View Detailed Reference Design

Features and Benefits

  • High accuracy
  • 0 to 10V input range
  • Isolated power and data
  • Small printed circuit board (PCB) area
  • Device drivers
  • Example C source code
  • Pmod™-compatible form factor
MAXREFDES4
MAXREFDES4
This 16-bit high-accuracy industrial analog input design accepts a 4–20mA current loop or a 0.2V to 4.096V voltage signal as input and provides a digital SPI output. The data path and power is fully isolated.
MAXREFDES4 (Campbell) Circuits from the lab

16-Bit High-Accuracy 4-20mA Input Isolated Analog Front End (AFE)

View Detailed Reference Design

Features and Benefits

  • High accuracy
  • 4–20mA current loop input
  • 0.2V to 4.096V input range
  • Isolated power and data
  • Small printed circuit board (PCB) area
  • Device drivers
  • Example C source code
  • Pmod™-compatible form factor
maxrefdes5fig00
maxrefdes5fig00
maxrefdes5fig01
Santa Fe (MAXREFDES5) Circuits from the lab

16-Bit High Accuracy Multi-Input Isolated Analog Front End (AFE)

View Detailed Reference Design

Features and Benefits

  • High accuracy
  • ±10V, 0 to 10V, and 4–20mA Inputs
  • Isolated power and data
  • Small printed circuit board (PCB) area
  • Device drivers
  • Example C source code
  • Pmod™-compatible form factor

5865fig01
5865fig01
maxrefdes71fig00
MAXREFDES71 Circuits from the lab

MAXREFDES71: 2-Channel Analog Input/Analog Output with Transformer Driven Power

View Detailed Reference Design

Features and Benefits

Applications

  • Industrial control automation
  • Servo drive

Competitive Advantages

  • High speed
  • High accuracy
  • Low noise

Features

  • Two independent analog inputs
  • Two independent analog outputs
  • Isolated power and data
  • High-speed 400ksps analog input sampling rate
  • High-accuracy 16-bit resolution
  • Voltage output settles to within 2 LSB in 17µs
  • Current output settles to within 2 LSB in 77µs
  • Device drivers
  • Example C source code
  • Configuration files for ZedBoard™ platform
  • FMC-compatible

5839fig00
5839fig00
5839fig01
Alameda MAXREFDES24 Circuits from the lab

Alameda (MAXREFDES24): 4-Channel Analog Output

View Detailed Reference Design

Features and Benefits

Features

  • Programmable high-accuracy current/voltage output
  • Current output drives up to 1kΩ
  • Voltage output drives loads down to 1kΩ
  • Extensive error reporting
  • Isolated power and data
  • Device drivers
  • Example C source code
  • Pmod™-compatible form factor

    • Competitive Advantages

    • Flexibility
    • System safety
    • Small solution size

    MAXREFDES6
    MAXREFDES6
    MAXREFDES6 - Design Block Diagram
    MAXREFDES6 (Fremont) Circuits from the lab

    16-Bit, High-Accuracy, 0 to 100mV Input, Isolated Analog Front-End (AFE)

    View Detailed Reference Design

    Features and Benefits

    Features

    • Applications
    • High-accuracy analog input
    • High impedance
    • 0 to 100mV input range
    • Isolated data path
    • Small printed-circuit board (PCB) area
    • Device drivers
    • Example C source code
    • Pmod™-compatible form factor

    Applications

    • Low-voltage output sensors
    • Process control
    • Medical

    Competitive Advantages

    • Unique single-ended architecture
    • Optimized board size
    • Magnetically immune data path isolation
    MAXREFDES74
    MAXREFDES74
    MAXREFDES74 Circuits from the lab

    MAXREFDES74: 18-Bit Precision Data Acquisition System

    View Detailed Reference Design

    Features and Benefits

    The MAXREFDES74# reference design features:

    • Power and data isolation
    • Flexible, configurable inverting or noninverting input scheme
    • Unipolar or bipolar input (ADC) and output (DAC)

    MAX11156

    • 18-bit resolution with no missing codes
    • SNR: 94.4dB
    • THD: -107dB at 1kHz
    • Buffered internal or external voltage reference input
    • Internal reference with -6ppm/°C (typ) temperature coefficient
    • Single 5V supply
    • True bipolar ±5V input range

    MAX5318

    • 18-bit resolution with no missing codes
    • High accuracy: ±2 LSB INL (max)
    • 3µs settling time
    • User-programmable offset and gain calibration
    • ±0.5ppm/°C (typ) offset and gain drift over temperature
    • Force/sense output
    • 50MHz SPI-compatible interface with 1.8V to 5.5V logic
    MAXREFDES38
    MAXREFDES38#: ECT/EPT Current Fault Sensor
    MAXREFDES38
    MAXREFDES38 System Block Diagram
    MAXREFDES60
    16-Bit Analog Output Micro PLC
    MAXREFDES60
    This single channel analog output reference design is in the micro PLC form factor. The on-board microcontroller controls a 16-bit DAC to produce a high accuracy 0-10V output. The design features isolated power and data.
    MAXREFDES46
    4-Channel Analog Input/Output
    MAXREFDES46
    MAXREFDES46-Fig01
    MAXREFDES77
    Dual-Channel Current Sense Peripheral Module
    MAXREFDES77 Connected to Munich Board
    MAXREFDES77
    MAXREFDES32
    2-Channel Analog Input/Analog Output with Flyback DC-DC
    MAXREFDES32
    MAXREFDES32 - Design Block Diagram
    MAXREFDES61
    16-Bit Four-Channel Analog Input Micro PLC Card
    MAXREFDES61 - Block Diagram
    MAXREFDES61
    MAXREFDES75
    MAXREFDES75#: 24-Bit Weigh Scale with a 16-Bit DAC, 0 to 10V Output
    MAXREFDES75
    MAXREFDES75 System Block Diagram
    MAXREFDES30
    8-Channel Simultaneous-Sampling Analog Front End
    MAXREFDES30
    MAXREFDES30
    MAXREFDES11 (Fresno)
    16-Bit High-Accuracy 0 to 10V Input Isolated Analog Front End (AFE)
    MAXREFDES11 - Block Diagram
    MAXREFDES11
    MAXREFDES4 (Campbell)
    16-Bit High-Accuracy 4-20mA Input Isolated Analog Front End (AFE)
    MAXREFDES4
    This 16-bit high-accuracy industrial analog input design accepts a 4–20mA current loop or a 0.2V to 4.096V voltage signal as input and provides a digital SPI output. The data path and power is fully isolated.
    Santa Fe (MAXREFDES5)
    16-Bit High Accuracy Multi-Input Isolated Analog Front End (AFE)
    maxrefdes5fig00
    maxrefdes5fig01
    MAXREFDES71
    MAXREFDES71: 2-Channel Analog Input/Analog Output with Transformer Driven Power
    5865fig01
    maxrefdes71fig00
    Alameda MAXREFDES24
    Alameda (MAXREFDES24): 4-Channel Analog Output
    5839fig00
    5839fig01
    MAXREFDES6 (Fremont)
    16-Bit, High-Accuracy, 0 to 100mV Input, Isolated Analog Front-End (AFE)
    MAXREFDES6
    MAXREFDES6 - Design Block Diagram
    MAXREFDES74
    MAXREFDES74: 18-Bit Precision Data Acquisition System
    MAXREFDES74

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