ADM1030ARQ-REEL7 ON Semiconductor, ADM1030ARQ-REEL7 Datasheet - Page 15

• Manufacturer Part Number: ADM1030ARQ-REEL7
• Description: IC SNSR TEMP/FAN PWM CTRL 16QSOP
• Manufacturer: ON Semiconductor

Specifications of ADM1030ARQ-REEL7

• Rohs Status: RoHS non-compliant
• Function: Fan Control, Temp Monitor
• Topology: ADC, Comparator, Multiplexer, Register Bank
• Sensor Type: External & Internal
• Sensing Temperature: 0°C ~ 100°C, External Sensor
• Output Type: SMBus™
• Output Alarm: Yes
• Output Fan: Yes
• Voltage - Supply: 3 V ~ 5.5 V
• Operating Temperature: 0°C ~ 100°C
• Mounting Type: Surface Mount
• Package / Case: 16-QSOP

RELEVANT REGISTERS FOR AUTOMATIC FAN SPEED
CONTROL MODE
Register 0x00 Configuration Register 1
<7>
<6:5> 00 = Remote Temperature controls Fan
Register 0x20 Fan Characteristics Register 1
<2:0> Fan 1 Spin-Up Time
<5:3> PWM Frequency Driving the Fan
<7:6> Speed Range N; defines the lowest fan speed that can be
Register 0x22 Fan Speed Configuration Register
<3:0> Min Speed: This nibble contains the speed at which the
REV. A
Logic 1 selects Automatic Fan Speed Control, Logic 0
selects software control (Default = 1).
11 = Fastest Calculated Speed controls the fan when
Bit 7 = Logic 1.
000 = 200 ms
001 = 400 ms
010 = 600 ms
011 = 800 ms
100 = 1 sec
101 = 2 secs (Default)
110 = 4 secs
111 = 8 secs
000 = 11.7 Hz
001 = 15.6 Hz
010 = 23.4 Hz
011 = 31.25 Hz (Default)
100 = 37.5 Hz
101 = 46.9 Hz
110 = 62.5 Hz
111 = 93.5 Hz
measured by the device.
00 = 1: Lowest Speed = 2647 RPM
01 = 2: Lowest Speed = 1324 RPM
10 = 4: Lowest Speed = 662 RPM
11 = 8: Lowest Speed = 331 RPM
fan will run when the temperature is at T
is 0x05, meaning that the fan will run at 33% duty cycle
when the temperature is at T
MIN
.
MIN
Rev. 2 | Page 15 of 29 | www.onsemi.com
. The default
–15–
Register 0x24 Local Temp T
<7:3> Local Temp T
<2:0> Local Temperature T
Register 0x25 Remote Temperature T
<7:3> Remote Temperature T
<2:0> Remote Temperature T
which the fan will turn on when under Auto Fan Speed
Control. T
00000 = 0 C
00001 = 4 C
00010 = 8 C
00011 = 12 C
01000 = 32 C (Default)
11110 = 120 C
11111 = 124 C
perature range over which Automatic Fan Speed Control
takes place.
000 = 5 C
001 = 10 C
010 = 20 C
011 = 40 C
100 = 80 C
which the fan will switch on based on Remote Tempera-
ture Readings.
00000 = 0 C
00001 = 4 C
00010 = 8 C
00011 = 12 C
01100 = 48 C
11110 = 120 C
11111 = 124 C
perature range over which the fan will be controlled based
on Remote Temperature readings.
000 = 5 C
001 = 10 C
010 = 20 C
011 = 40 C
100 = 80 C
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MIN
MIN
can be programmed in 4 C increments.
. These bits set the temperature at
RANGE
MIN
RANGE
MIN
/T
RANGE
. This nibble sets the tem-
. Sets the temperature at
. This nibble sets the tem-
MIN
/T
ADM1030
RANGE