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参数资料
| 型号： | ADM1028ARQZ-REEL7 |
| 厂商： | ANALOG DEVICES INC |
| 元件分类： | 模拟信号调理 |
| 英文描述： | SPECIALTY ANALOG CIRCUIT, PDSO16 |
| 封装： | MO-137AB, QSOP-16 |
| 文件页数： | 8/16页 |
| 文件大小： | 379K |
| 代理商： | ADM1028ARQZ-REEL7 |
REV. B
–16–
C02365–0–4/03(B)
ADM1028
Table X. Register 0xCO Fan Speed Ramp Register. Power-On Default <7:0> = 00h
Bit
Name
Read/Write
Description
0Fan Speed Ramp
Read/Write
Setting this bit to a “1” will enable the fan speed ramping mechanism.
Enable
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.
<2:1>
Ramp Rate
Read/Write
Fan Speed Ramp Rate. The speed at which the fan speed ramp counter
increments/decrements is selected as follows:
Bits <2:1>
Count Rate
Counter Frequency
00
1.0s
1 Hz
01
0.25s
4 Hz
10
0.125s
8 Hz
11
0.0625s
16 Hz
<7:3>
Reserved
Read/Write
Reserved (Default = 0)
OUTLINE DIMENSIONS
16-Lead Shrink Small Outline Package [QSOP]
(RQ-16)
Dimensions shown in inches
16
9
8
1
PIN 1
SEATING
PLANE
0.010
0.004
0.012
0.008
0.025
BSC
0.010
0.006
0.050
0.016
8
0
COPLANARITY
0.004
0.065
0.049
0.069
0.053
0.154
BSC
0.236
BSC
COMPLIANT TO JEDEC STANDARDS MO-137AB
0.193
BSC
Revision History
Location
Page
4/03—Data Sheet changed from REV. A to REV. B.
Added ESD Caution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Updated OUTLINE DIMENSIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
2/02—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
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