PRELIMINARY TECHNICAL DATA = Power Supply Monitor ASIC ADM1040 Preliminary Technical Data Analog Fan Speed Control Output FEATURES Monitors Multiple Voltage Rails (240VA Limited) Monitors Bulk DC, Op-Amp Supply, 5V Supply Monitors Voltage Rails 1,2 and 3 Currents Up to 3 Fan Speed Measurement Channels Up to 6 General-Purpose Logic Inputs External Temperature Measurement with Remote Diode (Two Channels) On-Chip Temperature Sensor SMBusTM Compatible Serial Interface SMBus ALERT Capability 512 Bytes On-Chip, Write-Protected E2PROM Shutdown Output for Overtemperature and 240VA Faults APPLICATIONS Network Servers and Personal Computers Microprocessor-Based Office Equipment Test Equipment and Measuring Instruments Limit Comparison of all Monitored Values FUNCTIONAL BLOCK DIAGRAM SDA SCL A1 A0/NTEST_OUT 2 3 22 23 FROM NAND TREE OUTPUT GPI0 4 SERIAL BUS INTERFACE GPIO REGISTERS FAN1/GPI1 5 VDD VDD/5VSB VALUE AND LIMIT REGISTERS FAN SPEED COUNTER ADDRESS POINTER REGISTER 7 GPI2/I2_+ 9 8K BYTES E 2PROM GPI3/I2_-/AIN2 10 GPI4/I3_+ 11 TEMPERATURE CONFIGURATION REGISTER GPI5/I3_- 12 D1-/GPI2 13 INPUT SIGNAL CONDITIONING AND ANALOG MULTIPLEXER D1+/GPI3 14 D2-/GPI4/FAN2 15 D2+/GPI5/FAN3 16 I1_+ 17 I1_-/AIN1 18 LIMIT COMPARATORS INTERRU PT STATUS REGISTERS INT MASK REGISTERS 1 ALERT 24 SHDN 8 DAC/NTEST_IN ADM1040 INTERRUPT MASKING AIN3 19 8-BIT ADC AIN4 20 AIN5 21 BANDGAP TEMP. SENSOR CONFIGURATION REGISTERS BANDGAP REFERENCE ANALOG OUTPUT REGISTER AND 8-BIT DAC TO NAND TREE ENABLE 6 GND REV. PrG 01/'01 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 which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. SMBus is a trademark One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 617/329-4700 World Wide Web Site: http://www.analog.com Fax: 617/326-8703 © Analog Devices, Inc., 2001