参数资料
| 型号： | ADN8831-EVALZ |
| 厂商： | Analog Devices Inc |
| 文件页数： | 1/20页 |
| 文件大小： | 0K |
| 描述： | BOARD EVAL FOR ADN8831 |
| 标准包装： | 1 |
| 相关产品： | ADN8831ACPZ-REEL7DKR-ND - IC THERMO COOLER CTRLR 32LFCSP ADN8831ACPZ-REEL7CT-ND - IC THERMO COOLER CTRLR 32LFCSP ADN8831ACPZ-REEL7TR-ND - IC THERMO COOLER CTRLR 32LFCSP |
Thermoelectric Cooler (TEC) Controller
Data Sheet
FEATURES
Two integrated zero drift, rail-to-rail, chop amplifiers
TEC voltage and current operation monitoring
Programmable TEC maximum voltage and current
Programmable TEC current heating and cooling limits
Configurable PWM switching frequency up to 1 MHz
Power efficiency: > 90%
Temperature lock indication
Optional internal or external clock source
Clock phase adjustment for multiple drop operation
Supports negative temperature coefficient (NTC) thermistors
or positive temperature coefficient (PTC) resistance
thermal detectors (RTDs)
5 V typical and optional 3 V supplies
Standby and shutdown mode availability
Adjustable soft start feature
5 mm × 5 mm 32-lead LFCSP
APPLICATIONS
Thermoelectric cooler (TEC) temperature control
DWDM optical transceiver modules
Optical fiber amplifiers
GENERAL DESCRIPTION
The ADN8831 is a monolithic TEC controller. It has two inte-
grated, zero drift, rail-to-rail comparators, and a PWM driver.
A unique PWM driver works with an analog driver to control
external selected MOSFETs in an H-bridge. By sensing the
thermal detector feedback from the TEC, the ADN8831 can
drive a TEC to settle the programmable temperature of a laser
diode or a passive component attached to the TEC module.
The ADN8831 supports NTC thermistors or positive tempera-
ture coefficient (PTC) RTDs. The target temperature is set as an
analog voltage input either from a DAC or from an external
resistor divider driven by a reference voltage source.
A proportional integral differential (PID) compensation
network helps to quickly and accurately stabilize the ADN8831
thermal control loop. An adjustable PID compensation network
example is described in the AN-695 Application Note , Using the
ADN8831 TEC Controller Evaluation Board . A typical reference
voltage of 2.5 V is available from the ADN8831 for thermistor
temperature sensing or for TEC voltage/current measuring and
limiting in both cooling and heating modes.
Optical networking systems
Instruments requiring TEC temperature control
FUNCTIONAL BLOCK DIAGRAM
ILIMC ILIMH
ITEC
VLIM
VTEC
CS
IN1P
LIMITER/MONITOR
LINEAR
LFB
AMPLIFIER
MOSFET
LPGATE
IN1N
Chop1
DRIVER
LNGATE
SFB
OUT1
IN2P
IN2N
AMPLIFIER
Chop2
CONTROL
PWM
MOSFET
DRIVER
SPGATE
SNGATE
COMPSW
SW
OUT2
REF
TMPGD VREF
SOFT START
SHUTDOWN
SS/SB
OSCILLATOR
SYNCI/SD PHASE FREQ
COMPOSC
SYNCO
Figure 1.
Rev. A
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.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700 www.analog.com
Fax: 781.461.3113 ?2005–2012 Analog Devices, Inc. All rights reserved.
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