Overview
The ADN8835ACPZ-R7, produced by Analog Devices Inc., is a monolithic Thermoelectric Cooler (TEC) controller. This device integrates a linear power stage, a pulse-width modulation (PWM) power stage, and two zero-drift, rail-to-rail chopper amplifiers. It is designed to control the temperature of laser diodes or passive components attached to a TEC module by driving current through the TEC to achieve a programmed target temperature. The ADN8835 supports both negative temperature coefficient (NTC) thermistors and positive temperature coefficient (PTC) resistive temperature detectors (RTDs), ensuring versatile thermal sensing capabilities.
Key Specifications
| Parameter | Symbol | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Driver Supply Voltage | VPVIN | 2.7 | - | 5.5 | V |
| Controller Supply Voltage | VVDD | 2.7 | - | 5.5 | V |
| Supply Current (PWM not switching) | IVDD | - | 3.3 | 5 | mA |
| N-MOSFET RDS_ON (VPVIN = 5.0 V) | RDS_NS(ON) | 45 | - | 85 | mΩ |
| P-MOSFET RDS_ON (VPVIN = 5.0 V) | RDS_PS(ON) | 60 | - | 85 | mΩ |
| Internal Oscillator Frequency | fOSC | 1.85 | 2.0 | 2.15 | MHz |
| Operating Temperature | - | -40 | - | 125 | °C |
| Package Type | - | - | - | 36-lead LFCSP | - |
Key Features
- Integrated low RDSON MOSFETs for the TEC controller.
- TEC voltage and current operation monitoring with no external sense resistor required.
- Independent TEC heating and cooling current-limit settings.
- Programmable maximum TEC voltage.
- 2.0 MHz (typical) PWM driver switching frequency with external synchronization capability.
- Two integrated, zero-drift, rail-to-rail chopper amplifiers.
- Compatible with NTC or RTD thermal sensors.
- 2.50 V reference output with 1% accuracy.
- Temperature lock indicator.
- High efficiency single inductor architecture.
Applications
- TEC temperature control.
- Optical modules.
- Optical fiber amplifiers.
- Optical networking systems.
- Instruments requiring TEC temperature control.
Q & A
- What is the ADN8835ACPZ-R7 used for? The ADN8835ACPZ-R7 is used for Thermoelectric Cooler (TEC) temperature control, particularly in applications such as optical modules, optical fiber amplifiers, and optical networking systems.
- What types of thermal sensors does the ADN8835 support? The ADN8835 supports both negative temperature coefficient (NTC) thermistors and positive temperature coefficient (PTC) resistive temperature detectors (RTDs).
- What is the typical PWM driver switching frequency of the ADN8835? The typical PWM driver switching frequency is 2.0 MHz.
- Does the ADN8835 require an external sense resistor? No, the ADN8835 does not require an external sense resistor for TEC voltage and current operation monitoring.
- What is the operating temperature range of the ADN8835? The operating temperature range is from -40°C to +125°C.
- What package type is the ADN8835 available in? The ADN8835 is available in a 36-lead LFCSP package.
- How does the ADN8835 control the TEC? The ADN8835 controls the TEC by using a linear power stage and a PWM power stage, along with integrated operational amplifiers as a PID compensator, to drive current through the TEC to achieve the programmed target temperature.
- What is the accuracy of the internal 2.50 V reference voltage? The internal 2.50 V reference voltage has an accuracy of 1%.
- Can the ADN8835 be synchronized externally? Yes, the ADN8835 supports external synchronization.
- What is the typical supply current of the ADN8835? The typical supply current is 3.3 mA when the PWM is not switching.
