ADN8831ACPZ-REEL7 Analog Devices Inc, ADN8831ACPZ-REEL7 Datasheet

IC THERMO COOLER CTRLR 32LFCSP

ADN8831ACPZ-REEL7

Manufacturer Part Number
ADN8831ACPZ-REEL7
Description
IC THERMO COOLER CTRLR 32LFCSP
Manufacturer
Analog Devices Inc
Datasheet

Specifications of ADN8831ACPZ-REEL7

Applications
Thermoelectric Cooler
Current - Supply
8mA
Voltage - Supply
3 V ~ 5.5 V
Operating Temperature
-40°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
32-LFCSP
Ic Function
Thermoelectric Cooler Controller
Supply Voltage Range
3V To 5.5V
Operating Temperature Range
-40°C To +85°C
Digital Ic Case Style
LFCSP
No. Of Pins
32
Msl
MSL 1 - Unlimited
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
ADN8831ACPZ-REEL7TR

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
ADN8831ACPZ-REEL7
Manufacturer:
ADI/亚德诺
Quantity:
20 000
FEATURES
On-chip temperature measurement amplifiers
TEC current voltage monitoring
Programmable maximum TEC voltage
Programmable maximum TEC current
Separate heating and cooling current limits
High efficiency: >90%
Temperature lock indication
Programmable switching frequency up to 1 MHz
Oscillator synchronization with an external signal
Clock phase adjustment for multiple operation
Compact 5 mm x 5 mm LFCSP
APPLICATIONS
Thermoelectric cooler (TEC) control
Optical transceiver modules
Optical fibre amplifiers
Optical networking systems
Rev. 0
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks and registered trademarks are the property of their respective owners.
OUT1
OUT2
IN1N
IN2N
IN1P
IN2P
AMPLIFIER
AMPLIFIER
CHOP1
CHOP2
TMPGD VREF
FUNCTIONAL BLOCK DIAGRAM
ILIMC ILIMH
Thermoelectric Cooler (TEC) Controller
REF
LIMITER/MONITOR
SS/SB
ITEC
SOFT-START
SHUTDOWN
Figure 1.
CONTROL
VLIM
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
GENERAL DESCRIPTION
The ADN8831 is a monolithic controller that drives a
thermoelectric cooler (TEC) to stabilize the temperature of a
laser diode or a passive component used in communications
equipment.
This device relies on a negative temperature coefficient (NTC)
thermistor or a positive temperature coefficient RTD device to
sense the temperature of the object attached to the TEC. The
target temperature is set with an analog input voltage either
from a DAC or with an external resistor divider.
The loop is stabilized by a PID compensation amplifier with
high stability and low noise. The compensation network can be
adjusted by the user to optimize temperature settling time.
The ADN8831 measures and limits a TEC current for both
heating and cooling, independently. A 2.5 V voltage reference is
provided for the thermistor temperature sensing bridge.
SYNCI/SD
VTEC
OSCILLATOR
CS
PHASE FREQ
MOSFET
MOSFET
LINEAR
DRIVER
DRIVER
PWM
© 2005 Analog Devices, Inc. All rights reserved.
LFB
LPGATE
LNGATE
SFB
SPGATE
SNGATE
COMPSW
SW
COMPOSC
SYNCO
ADN8831
www.analog.com

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ADN8831ACPZ-REEL7 Summary of contents

Page 1

FEATURES On-chip temperature measurement amplifiers TEC current voltage monitoring Programmable maximum TEC voltage Programmable maximum TEC current Separate heating and cooling current limits High efficiency: >90% Temperature lock indication Programmable switching frequency MHz Oscillator synchronization with an ...

Page 2

ADN8831 TABLE OF CONTENTS Features .............................................................................................. 1 Applications....................................................................................... 1 General Description ......................................................................... 1 Functional Block Diagram .............................................................. 1 Revision History ............................................................................... 2 Specifications..................................................................................... 3 Absolute Maximum Ratings............................................................ 5 Thermal Characteristics .............................................................. 5 ESD Caution.................................................................................. 5 Pin Configuration and Function Descriptions............................. ...

Page 3

SPECIFICATIONS Electrical characteristics Table 1. 1 Parameter PWM OUTPUT DRIVER Output Transition Time Nonoverlapping Clock Delay Output Resistance 2 Output Voltage Swing LINEAR OUTPUT AMPLIFIER Output Resistance 2 Output Voltage Swing ...

Page 4

ADN8831 1 Parameter TEC CURRENT MEASUREMENT ITEC Gain ITEC Output Range High ITEC Output Range Low ITEC Input Range 2 ITEC Bias Voltage ITEC Output Current TEC VOLTAGE MEASUREMENT VTEC Gain 2 VTEC Output Range 2 VTEC Bias Voltage VTEC ...

Page 5

ABSOLUTE MAXIMUM RATINGS Absolute maximum ratings at 25°C, unless otherwise noted. Table 2. Parameter Supply Voltage Input Voltage Storage Temperature Range Operating Temperature Range Operating Junction Temperature Lead Temperature (Soldering, 60 sec) ESD CAUTION ESD (electrostatic discharge) sensitive device. Electrostatic ...

Page 6

ADN8831 PIN CONFIGURATION AND FUNCTION DESCRIPTIONS Table 4. Pin Function Descriptions Pin No. Mnemonic Type 1 ILIMC Analog Input 2 IN1P Analog Input 3 IN1M Analog Input 4 OUT1 Analog Output 5 IN2P Analog Input 6 IN2M Analog Input 7 ...

Page 7

Pin No. Mnemonic Type 29 ITEC Analog Output 30 VTEC Analog Output 31 VLIM Analog Input 32 ILIMH Analog Input ILIMH VLIM 32 31 ADN8831 ILIMC 1 1.25V VOLTAGE IN1P 2 LIMIT CHOP1 IN1M 3 1.25V OUT1 4 IN2P 5 ...

Page 8

TYPICAL PERFORMANCE CHARACTERISTICS SPGATE Figure 4. SPGATE and SNGATE Rise Time Using Circuit Shown in Figure 12 SNGATE SPGATE T = 25° Figure 5. SNGATE and SPGATE Fall Time Using Circuit Shown in Figure 12 ...

Page 9

720 700 680 660 640 –40 – TEMPERATURE (°C) Figure 10. Switching Frequency vs. Temperature 200 Figure 11. Supply Current vs. Switching Frequency Rev. 0 ...

Page 10

ADN8831 THEORY OF OPERATION The ADN8831 is a controller for a thermoelectric cooler (TEC). The voltage applied to the input of the ADN8831 corresponds to the target temperature set point. The appropriate current is then applied to the TEC to ...

Page 11

OSCILLATOR CLOCK FREQUENCY The ADN8831 has an internal oscillator to generate the switching frequency for the output stage. This oscillator can be set in either free-run mode or synchronized to an external clock signal. Free-Run Operation The switching frequency is ...

Page 12

ADN8831 TEMPERATURE LOCK INDICATOR The TMPGD pin (Pin 11) outputs a logic high when the OUT1 voltage reaches the IN2P voltage. The TMPGD has a detection range of ±25 mV and typical hysteresis. This allows direct interfacing ...

Page 13

The sink current is set by the resistor connected from the FREQ pin to ground. Calculate the sink current SINK R FREQ Where I is the sink current at the VLIM pin, and R ...

Page 14

ADN8831 APPLICATIONS THERMISTOR INPUT AMPLIFIER /( IN1P + CHOP1 IN1N – V REF 17.68kΩ R REF 7.68kΩ (10kΩ @ 25°C) SIGNAL ...

Page 15

The V is centered around 25°C. With the typical OUT1 REF values shown in Figure 17, an averaged temperature-to-voltage coefficient is −25mV/° range of +5°C to +45°C. 2.5 2.0 1.5 1.0 0.5 0 –15 5 ...

Page 16

ADN8831 The voltage at OUT2 is determined by the compensation network that receives temperature set voltage and thermistor voltage fed by the input amplifier. V has a low limit LFB and an upper limit ...

Page 17

... OUTLINE DIMENSIONS PIN 1 INDICATOR 12° MAX 1.00 0.85 0.80 SEATING PLANE ORDERING GUIDE Model Temperature Range 1 ADN8831ACPZ-REEL7 −40°C to +85°C EVAL-ADN8831 −40°C to +85° Pb-free part. 5.00 BSC SQ 0.60 MAX 24 0.50 BSC TOP 4.75 VIEW BSC SQ 0.50 0.40 17 0.30 ...

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ADN8831 NOTES Rev Page ...

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NOTES Rev Page ADN8831 ...

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ADN8831 NOTES © 2005 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D04663-0-9/05(0) Rev Page ...

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