LTC7106

RECOMMENDED FOR NEW DESIGNS

A 7-Bit Current DAC with PMBus Interface

Data Sheet (Rev. A) Product Selection Table
Viewing:

Overview

  • ±0.8% IDAC Positive Output Current Accuracy (Over Temp)
  • ±1.5% IDAC Negative Output Current Accuracy (Over Temp)
  • PMBus/I2C Compliant Serial Interface
  • Input Voltage Range: 2.5V to 5.5V
  • High Impedance at IDAC Output When Disabled
  • Wide IDAC Operation Voltage (0.4V to 2.0V)
  • 7-Bit Programmable DAC Output Current for DC/DC VOUT Control
  • Wide Range IDAC Output Current: ±16μA to ±256μA
  • Programmable Slew Rate: 500ns ~ 3ms per Bit
  • Available in a 10-Lead (3mm × 2mm) DFN Package

The LTC7106 is a precision, PMBus controlled, bidirectional current digital-to-analog converter that adjusts the output voltage of any conventional VFB referenced regulator. The LTC7106 can work with the vast majority of power management controllers or regulators to enable digital control of the output voltage. Internal power-on reset circuitry keeps the DAC output current at zero (high impedance IDAC) until a valid write takes place. Features include a range bit for easy interfacing to almost any impedance resistor divider, and an open-drain GPO output for controlling the Run or Enable pin of the DC/DC regulator. For most applications, the current DAC error is significantly attenuated with proper design. See more detail about VOUT accuracy in the Applications Information section of this data sheet. The LTC7106 is supported by the ADI LTpowerPlay® development tool with graphical user interface (GUI).

Applications

  • General Purpose Power Systems
  • Telecom Systems
  • Industrial Applications
LTC7106
A 7-Bit Current DAC with PMBus Interface
LTC7106 Application Circuit LTC7106 Performance Graph LTC7106 Pin Configuration
Add to myAnalog

Add product to the Products section of myAnalog (to receive notifications), to an existing project or to a new project.

Create New Project
Ask a Question

Documentation

Data Sheet 1

User Guide 2

Technical Articles 1

Evaluation Design File 1

Informational 1

Learn More
Add to myAnalog

Add media to the Resources section of myAnalog, to an existing project or to a new project.

Create New Project

Software Resources

Can't find the software or driver you need?

Request a Driver/Software

Hardware Ecosystem

Parts Product Life Cycle Description
Power System Management (PSM) & Sequencers 1
LTC2975
RECOMMENDED FOR NEW DESIGNS 4-Channel PMBus Power System Manager Featuring Accurate Input Current and Energy Measurement
Modal heading
Add to myAnalog

Add product to the Products section of myAnalog (to receive notifications), to an existing project or to a new project.

Create New Project

Tools & Simulations

LTpowerPlay®

LTpowerPlay® is a powerful, Windows-based development environment supporting Linear Technology's Digital Power System Management (PSM) products.

Open Tool

Evaluation Kits

eval board
schematic 1
schematic 2
schematic 3
DC2830A

LTC7106 and LTM4636 Demo Board | 7-Bit DAC with PMBus Controlled Step-Down μModule Regulator

Buy Now View Details

Product Details

Demonstration circuit 2830A features the LTM4636EY, a 40A high efficiency, switch mode step-down µModule® regulator which is controlled by the LTC7106EDDB, a precision, bidirectional, 7-Bit current DAC with PMBus interface. The LTC7106 is used to adjust the output voltage of the LTM4636 by way of the PMBus. The LTM4636’s input voltage range is from 4.7V to 15V and the output voltage range is from 0.6V to 3.3V. De-rating is necessary for certain VIN, VOUT, frequency and thermal conditions. The LTC7106 requires an input voltage from 2.5V to 5.5V and on DC2830A it’s powered directly from the DC1613A dongle. The LTC7106 provides three ranges of IDAC output current: Nominal Range (–64µA to 63µA), Range High (–256µA to 252µA) and Range Low (–16µA to 15.75µA). The nominal range is optimized with the highest accuracy. It is recommended that users design the resistor divider using the nominal range of the IDAC setting.

To explore the power system management features of the LTC7106, download the GUI software LTpowerPlay® onto your PC and use ADI’s I2C/SMBus/PMBus Dongle DC1613A to connect to the board. LTpowerPlay allows the user to reconfigure the part on-the-fly, view IDAC current value and fault status.

The LTM4636 and LTC7106 data sheets must be read in conjunction with this demo manual prior to working on or modifying demo circuit DC2830A.

eval board
schematic 4
schematic 5
DC2620A

LTC7106 A 7-Bit Current DAC with Digital PMBus Interface

Buy Now View Details

Product Details

Demonstration circuit 2620A-A uses the LTC7106, a precision, bidirectional, 7-Bit current DAC with PMBus interface and can be used to adjust the output voltage of any conventional VFB referenced regulator. The LTC7106 can work with the vast majority of power management controllers, regulators or modules to enable digital control of the output voltage.

The DC2620A-A requires input voltage range from 2.5V to 5.5V, which can be powered either by external supply or directly from the DC1613A dongle. The LTC7106 provides three ranges of IDAC output current: Nominal Range (–64µA to 63µA), Range High (–256µA to 252µA) and Range Low (–16µA to 15.75µA). Only the nominal range is optimized with the highest accuracy. It is recommended that users design the resistor divider using the nominal range of the IDAC setting.

To explore the power system management features of the parts, download the GUI software LTpowerPlay onto your PC and use ADI’s I2C/SMBus/PMBus Dongle DC1613A to connect to the board. LTpowerPlay allows the user to reconfigure the part on-the-fly, view IDAC current value and fault status.
DC2830A
LTC7106 and LTM4636 Demo Board | 7-Bit DAC with PMBus Controlled Step-Down μModule Regulator
DC2830A Evaluation Board DC2830A Evaluation Board - Top View DC2830A Evaluation Board - Bottom View
DC2620A
LTC7106 A 7-Bit Current DAC with Digital PMBus Interface
DC2620A-A Image DC2620A-A Application Circuit

Latest Discussions

2 Years Ago
LTC7106EDDB and LTC7106IDDB difference?
2 Years Ago
Simulation in LTspice for LTC7106 and LTC3310
2 Years Ago
LTM8027 as Variable output voltage
View related discussion on EngineerZone®

Recently Viewed