ADM1028ARQ 查看數據表（PDF） - Analog Devices
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ADM1028ARQ Datasheet PDF : 16 Pages
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ADM1028
Bit
0
<2:1>
<7:3>
Table X. Register 0xCO Fan Speed Ramp Register. Power-On Default <7:0> = 00h
Name
Fan Speed Ramp
Enable
Ramp Rate
Reserved
Read/Write
Read/Write
Read/Write
Read/Write
Description
Setting this bit to a “1” will enable the fan speed ramping mechanism.
When this bit is a 1, writing to the Fan Speed Register will set the new
target fan speed; the input to the DAC will then count, up or down as
appropriate, to the new fan speed value at the rate specified in bits [1:2]
of this register. Clearing this bit to “0” will disable the fan speed ramp-
ing mechanism and will cause data written to the Fan Speed Register to
be immediately reflected to the DAC. The DAC input may or may not
continue ramping if this bit is changed from a “1” to a “0” while the fan
speed is currently ramping.
Fan Speed Ramp Rate. The speed at which the fan speed ramp counter
increments/decrements is selected as follows:
Bits <2:1>
00
01
10
11
Count Rate
1.0s
0.25s
0.125s
0.0625s
Counter Frequency
1 Hz
4 Hz
8 Hz
16 Hz
Reserved (Default = 0)
OUTLINE DIMENSIONS
Dimensions shown in inches and (mm).
16-Lead Shrink Small Outline Package (QSOP)
(RQ-16)
0.197 (5.00)
0.189 (4.80)
16
0.157 (3.99)
0.150 (3.81)
1
9
0.244 (6.20)
0.228 (5.79)
8
PIN 1
0.059 (1.50)
MAX
0.069 (1.75)
0.053 (1.35)
0.010 (0.25)
0.004 (0.10)
0.025
(0.64)
BSC
8؇
0.012 (0.30) SEATING 0.010 (0.20) 0؇
0.008 (0.20) PLANE 0.007 (0.18)
REF: JEDEC 0.150" SSOP – DRAWING NUMBER MO-137
0.050 (1.27)
0.016 (0.41)
Revision History
Location
Page
Data Sheet changed from REV. 0 to REV. A.
Edits to FUNCTIONAL BLOCK DIAGRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Edits to SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Added Fan Speed Ramp Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Edits to Table III . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Added Table X . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
–16–
REV. A
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