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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)
Part Models
42
1ku List Price
Starting From $4.14
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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
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

Buy Now View Details

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.

MAXSANTAFEEVSYS User Manual is available for download.

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

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

    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

    View Detailed Reference Design

    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

    View Detailed Reference Design

    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

    View Detailed Reference Design

    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
    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
    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
    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
    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
    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
    MAXREFDES6 (Fremont)
    16-Bit, High-Accuracy, 0 to 100mV Input, Isolated Analog Front-End (AFE)
    MAXREFDES6
    MAXREFDES6 - Design Block Diagram
    MAXREFDES11 (Fresno)
    16-Bit High-Accuracy 0 to 10V Input Isolated Analog Front End (AFE)
    MAXREFDES11 - Block Diagram
    MAXREFDES11
    MAXREFDES74
    MAXREFDES74: 18-Bit Precision Data Acquisition System
    MAXREFDES74

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