Products
ADN8834
RECOMMENDED FOR NEW DESIGNSUltracompact 1.5 A Thermoelectric Cooler (TEC) Controller
- Part Models
- 4
- 1ku List Price
- Starting From $7.38
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Overview
- 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 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
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.
Documentation
Data Sheet 1
User Guide 1
Technical Articles 2
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) | ||
| ADN8834ACPZ-R2 | 24-Lead LFCSP (4mm x 4mm w/ EP) | ||
| ADN8834ACPZ-R7 | 24-Lead LFCSP (4mm x 4mm w/ EP) | ||
| ADN8834WACPZ-R7 | 24-Lead LFCSP (4mm x 4mm w/ EP) |
| 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 | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
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Request a Driver/SoftwareTools & Simulations
LTspice
Models for the following parts are available in LTspice:
- ADN8834
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.
Evaluation Kits
ADN8834 Evaluation Board