ADN8834

RECOMMENDED FOR NEW DESIGNS

ADN8834

Ultracompact 1.5 A Thermoelectric Cooler (TEC) Controller

RECOMMENDED FOR NEW DESIGNS

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1ku List Price Starting From $6.42

Features

Patented high efficiency single inductor architecture
Integrated low R_DSON MOSFETs for the TEC controller
TEC voltage and current operation monitoring
No external sense resistor required
Independent TEC heating and cooling current limits settings
Programmable maximum TEC voltage
2.0 MHz PWM driver switching frequency

External synchronization
Two integrated zero drift, rail-to-rail chopper amplifiers
Capable of NTC or RTD thermal sensors
2.50 V reference output with 1% accuracy
Temperature lock indicator
Available in a 25-ball, 2.5 mm × 2.5 mm WLCSP or in a 24-lead, 4 mm × 4 mm LFCSP
AEC-Q100 qualified for automotive applications

Additional Details

The ADN8834¹ is a monolithic TEC controller with an integrated TEC controller. It has a linear power stage, a pulse-width modulation (PWM) power stage, and two zero-drift, rail-to-rail operational amplifiers. The linear controller works with the PWM driver to control the internal power MOSFETs in an H-bridge configuration. By measuring the thermal sensor feedback voltage and using the integrated operational amplifiers as a proportional integral differential (PID) compensator to condition the signal, the ADN8834 drives current through a TEC to settle the temperature of a laser diode or a passive component attached to the TEC module to the programmed target temperature.

The ADN8834 supports negative temperature coefficient (NTC) thermistors as well as positive temperature coefficient (PTC) resistive temperature detectors (RTD). The target temperature is set as an analog voltage input either from a digital-to-analog converter (DAC) or from an external resistor divider.

The temperature control loop of the ADN8834 is stabilized by PID compensation utilizing the built in, zero drift chopper amplifiers. The internal 2.50 V reference voltage provides a 1% accurate output that is used to bias a thermistor temperature sensing bridge as well as a voltage divider network to program the maximum TEC current and voltage limits for both the heating and cooling modes. With the zero drift chopper amplifiers, extremely good long-term temperature stability is maintained via an autonomous analog temperature control loop.

APPLICATIONS

TEC temperature control
Optical modules
Optical fiber amplifiers
Optical networking systems
Instruments requiring TEC temperature control

¹ Product is covered by U.S. Patent No. 6,486,643.

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Ask a Question

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Support

Analog Devices Support Portal is a one-stop shop to answer all your ADI questions.

Visit the ADI Support Page

Ask the ADI community for help.

Ask the EngineerZone Community

FAQs

Sales & Ordering FAQs

Part Models 4

1ku List Price Starting From $6.42

Technical Documents 2

ADN8834: Ultracompact, 1.5 A Thermoelectric Cooler (TEC) Controller Data Sheet (Rev.C) 08/10/2015

UG-858: Evaluating the ADN8834 Ultracompact 1.5 A Thermoelectric Cooler (TEC) Controller 10/07/2015

Design Resources 4

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
ADN8834ACBZ-R7	25-Ball WLCSP (2.54mm x 2.54mm)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
ADN8834ACPZ-R2	24-Lead LFCSP (4mm x 4mm w/ EP)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
ADN8834ACPZ-R7	24-Lead LFCSP (4mm x 4mm w/ EP)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys
ADN8834WACPZ-R7	24-Lead LFCSP (4mm x 4mm w/ EP)	HTML Material Declaration HTML Reliablity Data	Ultra Librarian SamacSys

ADN8834ACBZ-R7
Pin/Package Drawing
25-Ball WLCSP (2.54mm x 2.54mm)
Documentation

HTML Material Declaration

HTML Reliablity Data

CAD Symbols, Footprints, and 3D Models
Ultra Librarian
SamacSys

ADN8834ACPZ-R2
Pin/Package Drawing
24-Lead LFCSP (4mm x 4mm w/ EP)
Documentation

HTML Material Declaration

HTML Reliablity Data

CAD Symbols, Footprints, and 3D Models
Ultra Librarian
SamacSys

ADN8834ACPZ-R7
Pin/Package Drawing
24-Lead LFCSP (4mm x 4mm w/ EP)
Documentation

HTML Material Declaration

HTML Reliablity Data

CAD Symbols, Footprints, and 3D Models
Ultra Librarian
SamacSys

ADN8834WACPZ-R7
Pin/Package Drawing
24-Lead LFCSP (4mm x 4mm w/ EP)
Documentation

HTML Material Declaration

HTML Reliablity Data

CAD Symbols, Footprints, and 3D Models
Ultra Librarian
SamacSys

PCN/PDN Information

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Part Models

Product Lifecycle

PCN

May 30, 2018

- 18_0019

Revision to Thickness of Polyimide and Redistribution Layers for ADN8833 and ADN8834 in WLCSP

ADN8834ACBZ-R7

PRODUCTION

pdf

PCN18_0019_Form

xls

Material_Report

Qualification Plan

Filter by Model

Part Models

Product Lifecycle

PCN

May 30, 2018

- 18_0019

Revision to Thickness of Polyimide and Redistribution Layers for ADN8833 and ADN8834 in WLCSP

ADN8834ACBZ-R7

PRODUCTION

pdf

PCN18_0019_Form

xls

Material_Report

Qualification Plan

EVAL-ADN8834

ADN8834 Evaluation Board

ADN8834 Evaluation Board

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EVAL-ADN8834

ADN8834 Evaluation Board

Features and Benefits

Full featured evaluation boards for the ADN8834
Complete TEC controller with integrated 1.5A TEC driver
Operating voltage range: V_IN = 2.7V to 5.5V
TEC voltage and current operation monitoring
Independent TEC heating and cooling current limit settings
Programmable maximum TEC voltage
External synchronization from 1.85 MHz to 3.25 MHz
Input for NTC thermistor connection
Output for TEC module wires
2.5V reference out
Disable jumper
40mm × 25 mm WLCSP board size
45mm × 25 mm LFCSP board size

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Product Detail

The ADN8834CB-EVALZ and ADN8834CP-EVALZ are configurable evaluation boards designed to work with various TEC modules and thermistors. The ADN8834 on the evaluation board delivers and controls bidirectional current through TEC using two pairs of the complimentary integrated MOSFETs in an H-bridge configuration.

The TEC cooling and heating current limits set to 1.5 A and the maximum TEC voltage is programmed to be 3V respectively using two on-board resistor dividers. The temperature set-point circuit is optimized to work with 10 kΩ NTC thermistor. The PID compensation network components are present onboard and can be replaced by soldering different value components to match the temperature control loop characteristic with the thermal load for achieving the required response time and temperature stability. The cooling and heating TEC current limits and maximum TEC voltage setting can be modified also by changing values of the corresponding components.

In addition, the board can be plugged into the ADN8833/34 Base board that has adjustable components for tunable analog thermal PID, the temperature set point, maximum TEC current and TEC voltage limits.

Resources

PDF

UG-858: Evaluating the ADN8834 Ultracompact 1.5 A Thermoelectric Cooler (TEC) Controller

808.61 K

EVAL-ADN8834

ADN8834 Evaluation Board

LTspice 1

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.

To launch ready-to-run LTspice demonstration circuits for this part:

Step 1: Download and install LTspice on your computer.

Step 2: Click on the link in the section below to download a demonstration circuit.

Step 3: If LTspice does not automatically open after clicking the link below, you can instead run the simulation by right clicking on the link and selecting “Save Target As.” After saving the file to your computer, start LTspice and open the demonstration circuit by selecting ‘Open’ from the ‘File’ menu.