ADN8834 Ultra compact 1.5 A Thermoelectric Cooler (TEC) Controller

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

Features and Benefits

Patented high efficiency single inductor architecture
Integrated low RDSON MOSFETs for TEC driver
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
Available in a 25-ball, 2.5 mm x 2.5 mm WLCSP or in a 24-lead, 4 mm x 4 mm LFCSP

Optical

Thermoelectric Cooler Controller

Data Sheets

Document	note
ADN8834: Ultracompact, 1.5 A Thermoelectric Cooler (TEC) Controller (Rev. A)	PDF 1.24 M

User Guides

Document	note
UG-858: Evaluating the ADN8834 Ultracompact 1.5 A Thermoelectric Cooler (TEC) Controller	PDF 808.61 K

Order Information

Part Number	Package	Packing Qty	Temp Range	Price 100-499	Price 1000+	RoHS
ADN8834ACBZ-R7 Production	25 ball WLCSP	REEL 1500	-40 to 125C	0	5	Y
ADN8834ACPZ-R2 Production	24 ld LFCSP (4x4mm w/2.60mm EP)	REEL 250	-40 to 125C	5.88	5.88	Y
ADN8834ACPZ-R7 Production	24 ld LFCSP (4x4mm w/2.60mm EP)	REEL 1500	-40 to 125C	0	5	Y