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Analog Devices Inc. ADN8834 Ultra-compact TEC Controller

Analog Devices ADN8834 Ultra-compact 1.5A Thermoelectric Cooler (TEC) Controller consists of a linear power stage, a pulse-width modulation (PWM) power stage, and two zero-drift, rail-to-rail operational amplifiers. The device controls and delivers bidirectional current through the TEC using two pairs of the complimentary integrated MOSFETs in an H-bridge configuration. Signal conditioning is achieved by measuring the thermal sensor feedback voltage and using the integrated operational amplifiers as a proportional integral differential (PID) compensator.

The ADN8834 stabilizes the temperature control loop through PID compensation. The internal 2.50V 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. The zero drift chopper amplifiers help the ADN8834 maintain long-term temperature stability via an autonomous analog temperature control loop.

Features

  • Patented high-efficiency single inductor architecture
  • Integrated low RDSON MOSFETs for the TEC controller
  • TEC voltage and current operation monitoring
  • No external sense resistor required
  • Independent TEC heating and cooling current limit settings
  • Programmable maximum TEC voltage
  • 2.0MHz PWM driver switching frequency
  • External synchronization
  • Two integrated, zero drift, rail-to-rail chopper amplifiers
  • Capable of NTC or RTD thermal sensors
  • 2.5V reference output with 1% accuracy
  • Temperature lock indicator
  • Available in a 25-ball, 2.5mm × 2.5mm WLCSP or in a 24-lead, 4mm × 4mm LFCSP

Applications

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

Block Diagram

Block Diagram - Analog Devices Inc. ADN8834 Ultra-compact TEC Controller

View EVAL-ADN8834 Evaluation Boards

EVAL-ADN8834 Evaluation Boards

Analog Devices Inc. EVAL-ADN8834 Evaluation Boards

Configurable evaluation boards featuring the ADN8834 TEC Controller.

Learn Moreabout Analog Devices Inc. EVAL-ADN8834 Evaluation Boards View Productsrelated to Analog Devices Inc. EVAL-ADN8834 Evaluation Boards
Published: 2016-01-29 | Updated: 2022-03-11