ADM1027ARQ-REEL7 ,Complete Systems Monitor and Multiple Fan Controller™dBCOOL Remote ThermalController and Voltage Monitor*ADM1027
ADM1027ARQZ ,Complete Systems Monitor and Multiple Fan ControllerAPPLICATIONSLow Acoustic Noise PCsNetworking and Telecommunications EquipmentFUNCTIONAL BLOCK DIAGR ..
ADM1027ARQZ-REEL7 ,Complete Systems Monitor and Multiple Fan ControllerAPPLICATIONSLow Acoustic Noise PCsNetworking and Telecommunications EquipmentFUNCTIONAL BLOCK DIAGR ..
ADM1028ARQ ,Remote Thermal Diode Monitor with Linear Fan ControlSPECIFICATIONS (T = T to T , V = V to V , unless otherwise noted.)A MIN MAX CC MIN MAXParameter Min ..
ADM1028ARQ-REEL ,Remote Thermal Diode and Linear Fan ControlSPECIFICATIONS (T = T to T , V = V to V , unless otherwise noted.)A MIN MAX CC MIN MAXParameter Min ..
ADM1028ARQ-REEL ,Remote Thermal Diode and Linear Fan ControlCHARACTERISTICSPositive Supply Voltage (V ) . . . . . . . . . . . . . . . . . . . . . 6.5 VCC 16-Le ..
AH114-89G , ¼ Watt, High Linearity InGaP HBT Amplifier
AH115-S8 , 1/2 Watt, High Linearity InGaP HBT Amplifier
AH116-S8 , 1/2 Watt, High Linearity InGaP HBT Amplifier
AH118-89 , 1/4 Watt, High Linearity InGaP HBT Amplifier
AH118-89 , 1/4 Watt, High Linearity InGaP HBT Amplifier
AH118-89G , ¼ Watt, High Linearity InGaP HBT Amplifier
ADM1027ARQ-ADM1027ARQ-REEL-ADM1027ARQ-REEL7-ADM1027ARQZ-ADM1027ARQZ-REEL7
Complete Systems Monitor and Multiple Fan Controller
REV.A
COOL™ Remote Thermal
Controller and Voltage Monitor*. Patent Nos. 6,188,189; 6,169,442; 6,097,239; 5,982,221;
and 5,867,012. Other patents pending.
FEATURES
Monitors up to 5 Supply Voltages
Controls and Monitors up to 4 Fan Speeds
1 On-Chip and 2 Remote Temperature Sensors
Monitors up to 5 Processor VID Bits
Automatic Fan Speed Control Mode Controls System
Cooling Based on Measured Temperature
Enhanced Acoustic Mode Dramatically Reduces User
Perception of Changing Fan Speeds
2-Wire and 3-Wire Fan Speed Measurement
Limit Comparison of All Monitored Values
Meets SMBus 2.0 Electrical Specifications
(Fully SMBus 1.1 Compliant)
APPLICATIONS
Low Acoustic Noise PCs
Networking and Telecommunications Equipment
FUNCTIONAL BLOCK DIAGRAM
GENERAL DESCRIPTIONThe ADM1027 dBCOOL controller is a complete systems
monitor and multiple PWM fan controller for noise sensitive
applications requiring active system cooling. It can monitor
12 V, 5 V, 2.5 V CPU supply voltage, plus its own supply volt-
age. It can monitor the temperature of up to two remote sensor
diodes, plus its own internal temperature. It can measure and
control the speed of up to four fans so that they operate at the
lowest possible speed for minimum acoustic noise. The auto-
matic fan speed control loop optimizes fan speed for a given
temperature. Once the control loop parameters are programmed,
the ADM1027 can vary fan speed without CPU intervention.
ADM1027–SPECIFICATIONS1, 2, 3, 4(TA = TMIN to TMAX (0�C to 105�C), VCC = VMIN to VMAX (3 V to 5.5 V),
unless otherwise noted.)TEMP-TO-DIGITAL CONVERTER
ANALOG-TO-DIGITAL CONVERTER
(INCLUDING MUX AND ATTENUATORS)
FAN RPM-TO-DIGITAL CONVERTER
ADM1027NOTES
1All voltages are measured with respect to GND, unless otherwise specified.
2Typicals are at TA = 40∞C and represent the most likely parametric norm.
3Logic inputs will accept input high voltages up to VMAX even when the device is operating down to VMIN.
4Timing specifications are tested at logic levels of VIL = 0.8 V for a falling edge and VIH = 2.0 V for a rising edge.
Specifications subject to change without notice.
ADM1027
CAUTIONESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000V readily
ABSOLUTE MAXIMUM RATINGS*Positive Supply Voltage (VCC) . . . . . . . . . . . . . . . . . . . . .6.5 V
Voltage on 12 VIN Pin . . . . . . . . . . . . . . . . . . . . . . . . . . . .20 V
Voltage on Any Other Input or Output Pin . . . .–0.3 V to +6.5 V
Input Current at Any Pin . . . . . . . . . . . . . . . . . . . . . . . .±5 mA
Package Input Current . . . . . . . . . . . . . . . . . . . . . . . .±20 mA
Maximum Junction Temperature (TJ MAX) . . . . . . . . . .150∞C
Storage Temperature Range . . . . . . . . . . . . .–65∞C to +150∞C
Lead Temperature, Soldering
Vapor Phase (60 sec) . . . . . . . . . . . . . . . . . . . . . . . . .215∞C
Infrared (15 sec) . . . . . . . . . . . . . . . . . . . . . . . . . . . .200∞C
ESD Rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2000 V
*Stresses above those listed under Absolute Maximum Ratings may cause perma-
nent damage to the device. This is a stress rating only; functional operation of the
device at these or any other conditions above those indicated in the operational
section of this specification is not implied. Exposure to absolute maximum rating
conditions for extended periods may affect device reliability.
PIN CONFIGURATION
ORDERING GUIDE
ModelADM1027
THERMAL CHARACTERISTICS24-Lead QSOP Package:qJA = 123∞C/W, qJC = 27∞C/W
Figure 1. Diagram for Serial Bus Timing
PIN FUNCTION DESCRIPTIONS
