ADM1022ARQ Analog Devices, ADM1022ARQ Datasheet
ADM1022ARQ
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ADM1022ARQ Summary of contents
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RST1 RST2 V CC 20k MR BANDGAP TEMPERATURE SENSOR D1+ D1– D2+/GPI D2–/THERM Monitor and Fan Control ASIC GENERAL DESCRIPTION The ADM1022 is a low cost temperature monitor and fan con- troller for microprocessor-based systems. The temperature of one ...
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ADM1022–SPECIFICATIONS Parameter POWER SUPPLY Supply Voltage Supply Current TEMPERATURE-TO-DIGITAL CONVERTER Internal Sensor Accuracy Resolution External Diode Sensor Accuracy Resolution Remote Sensor Source Current Total Monitoring Cycle Time ANALOG OUTPUT Output Voltage Range Total Unadjusted ...
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Parameter DIGITAL INPUT LOGIC LEVELS (FAN_SPD/NTEST_IN, ADD/NTEST_OUT, MR, GPI) Input High Voltage Input Low Voltage DIGITAL INPUT LEAKAGE CURRENT (ALL DIGITAL INPUTS) Input High Current Input Low Current Input Capacitance ...
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... Exposure to absolute maximum rating conditions for extended periods may affect device reliability THERMAL CHARACTERISTICS + 0 16-Lead QSOP Package θ = 105°C/W JA θ = 39°C/W JA Model ADM1022ARQ 0°C to 85°C PIN CONFIGURATION FAN_OFF SDA SCL INT RST1 3 14 ADM1022 ...
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Pin No. Mnemonic Description FAN_OFF 1 Digital Output (Open-Drain) Fan Off Request. When asserted low this indicates a request to shut off the fan independent of the FAN_SPD output. When negated (output FET off) it indicates that the fan may ...
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ADM1022 –Typical Performance Characteristics DXP TO GND 0 –10 DXP –20 –30 –40 –50 –60 1 3.3 10 LEAKAGE RESISTANCE – 250mV p-p REMOTE 100mV p-p REMOTE ...
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SQ. WAVE 500 5k 50k 100k 500k 5M FREQUENCY – Hz 2.3 2 5.5V DD 2.1 2.0 1 3. ...
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ADM1022 If ADD is left open-circuit the default address will be 0101100. The facility to make hardwired changes to A1 and A0 allows the user to avoid conflicts with other devices sharing the same serial bus; for example, if more ...
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SCL SDA START BY MASTER SERIAL BUS ADDRESS BYTE 1 SCL SDA START BY MASTER FRAME 1 SERIAL BUS ADDRESS BYTE 1 SCL 0 SDA START BY MASTER FRAME ...
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ADM1022 BIAS D+ REMOTE SENSING BIAS D– TRANSISTOR DIODE LOW-PASS FILTER f = 65kHz discrete transistor is used, the collector will not be grounded, and should be linked to the base. If ...
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ANALOG OUTPUT The ADM1022 has a single analog output (FAN_SPD) from an unsigned 8-bit DAC that produces 0 V–2.5 V. The analog out- put register defaults to 00 during power-on reset, which produces minimum fan speed. The analog output may ...
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ADM1022 FAULT TOLERANT FAN CONTROL The ADM1022 incorporates a fault tolerant fan control capabil- ity that is tied to operation of the THERM output. It can over- ride the setting of the analog output and force it to maximum to ...
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THERM INPUT/OUTPUT Pin 11 may be configured as an input for a second temperature sensor by setting Bit 7 of the Configuration Register may be used as an interrupt output by clearing Bit 7 of the Configu- ration ...
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ADM1022 GENERAL PURPOSE LOGIC INPUT (GPI) Pin 12 may be configured as an input for a second temperature sensor input by setting Bit 7 of the Configuration Register may be used as a general purpose logic input by ...
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V OPERATION The ADM1022 may be operated with V nected to any supply voltage between 3.0 V and 5.5 V, but it should be noted that the reset threshold voltages are fixed and optimized for 3.3 V operation. If ...
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ADM1022 Register Name Value Registers Company ID Revision Configuration Register Interrupt Status Register Reserved for Future Use Interrupt Mask Register Reserved for Future Use Reserved for Future Use Reserved for Future Use Interrupt Status Register Mirror Address Read/Write 0x13 Read/Write ...
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Bit Name Read/Write 0 START Read/Write INT Enable 1 Read/Write INT Clear 2 Read/Write 3 Programmable Read/Write Automatic Trip Once Point Lock Bit 4 Soft Reset Read/Write FAN OFF 5 Read/Write 6 GPI Invert Read/Write 7 D2 Read/Write Table VII. ...
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ADM1022 Table VIII. 0x43 Interrupt Mask Register. Power-On Default <7:0> = 00h Bit Name Read/Write 0 Int. Temp Error Read Only 1 Ext. Temp2 Error Read Only 2 Diode 2 Fault Read Only 3 Reserved Read Only 4 GPI Input ...
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OUTLINE DIMENSIONS Dimensions shown in inches and (mm). 16-Lead QSOP (RQ-16) 0.197 (5.00) 0.189 (4.80 0.157 (3.99) 0.244 (6.20) 0.228 (5.79) 0.150 (3.81 PIN 1 0.069 (1.75) 0.059 (1.50) MAX 0.053 (1.35) 0.010 (0.25) 0.012 (0.30) ...