Electronic Components Datasheet Search |
|
ADN8834 Datasheet(PDF) 1 Page - Analog Devices |
|
ADN8834 Datasheet(HTML) 1 Page - Analog Devices |
1 / 27 page Ultracompact, 1.5 A Thermoelectric Cooler (TEC) Controller Data Sheet ADN8834 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 2.0 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 APPLICATIONS TEC temperature control Optical modules Optical fiber amplifiers Optical networking systems Instruments requiring TEC temperature control FUNCTIONAL BLOCK DIAGRAM TEC CURRENT AND VOLTAGE SENSE AND LIMIT CONTROLLER LINEAR POWER STAGE TEC DRIVER PWM POWER STAGE OSCILLATOR VOLTAGE REFERENCE OUT1 VLIM/ SD VTEC ILIM PVIN ITEC EN/SY VREF LDR SFB IN2P IN2N IN1P IN1N OUT2 SW PGNDx VDD AGND ERROR AMP COMP AMP Figure 1. GENERAL DESCRIPTION The ADN8834 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. Table 1. TEC Family Models Device No. MOSFET Thermal Loop Package ADN8831 Discrete Digital/analog LFCSP (CP-32-7) ADN8833 Integrated Digital WLCSP (CB-25-7), LFCSP (CP-24-15) ADN8834 Integrated Digital/analog WLCSP (CB-25-7), LFCSP (CP-24-15) Rev. A Document Feedback Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibilityisassumedbyAnalogDevicesforitsuse,norforanyinfringementsofpatentsorother rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 ©2015 Analog Devices, Inc. All rights reserved. Technical Support www.analog.com |
Similar Part No. - ADN8834 |
|
Similar Description - ADN8834 |
|
|
Link URL |
Privacy Policy |
ALLDATASHEET.COM |
Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Datasheet Upload | Contact us | Privacy Policy | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |