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| 型号： | ADM1034ARQZ-REEL |
| 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： | LEAD FREE, MO-137AB, QSOP-16 |
| 文件页数： | 10/40页 |
| 文件大小： | 1318K |
| 代理商： | ADM1034ARQZ-REEL |
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ADM1034
Rev. 0 | Page 18 of 40
ADDITIONAL FUNCTIONS
Several other temperature measurement functions available on
the ADM1034 offer the systems designer added flexibility.
Turn-off Averaging
The ADM1034 performs averaging at conversion rates of less
than or equal to 8 conversions per second. This means that the
value in the measurement register is the average of 16 measure-
ments. For faster measurements, set the conversion rate to 16
conversions per second or greater. (Averaging is not carried out
at these conversion rates.) Alternatively, switch off averaging at
the slower conversion rates by setting Bit 1 (AVG) of
Configuration 1 Register (Address 0x01).
Single-Channel ADC Conversions
In normal operating mode, the ADM1034 converts on three
temperature channels: the local temperature channel, and the
remote 1 and remote 2 channels. However, the user has the
option to set up the ADM1034 to convert on one channel only.
To enable single-channel mode, the user sets the round-robin
bit (Bit 7) in Configuration Register 2 (Address 0x02) to 0.
When the round-robin bit equals 1, the ADM1034 converts on
all three temperature channels. In single-channel mode, it
converts on one channel only, to be determined by the state of
the channel selector bits (Bits 5 and 4) of the Configuration
Register 2 (Address 0x02).
Table 11. Channel Selector
Bits 5:4
Channel Selector (Configuration 2)
00
Local Channel = Default
01
Remote 1 Channel
10
Remote 2 Channel
11
Reserved
Removing Temperature Errors
As CPUs run faster and faster, it gets more difficult to avoid
high frequency clocks when routing the D+ and D traces
around a system board. Even when the recommended layout
guidelines are followed, temperature errors attributed to noise
coupled onto the D+ and D lines remain. High frequency
noise generally gives temperature measurements that are
consistently too high. The ADM1034 has Local, Remote 1, and
Remote 2 temperature offset registers at 0x16, 0x17, and 0x18—
one for each channel. By completing a one-time calibration, the
user can determine the offset caused by the system board noise
and remove it using the offset registers. The registers
automatically add a twos compliment word to the remote
temperature measurements, ensuring correct readings in the
value registers.
Table 12. Offset Registers
Registration
Description
Default
0x16
Local Offset
0x00
0x17
Remote 1 Offset
0x00
0x18
Remote 2 Offset
0x00
Table 13. Offset Register Values
Code
Offset Value
0 0000 000
0°C (Default Value)
0 0000 001
0.125°C
0 0000 111
0.875°C
0 0001 111
1.875°C
0 0111 111
7.875°C
0 1111 111
15.875°C
1 0000 000
16°C
1 1111 000
0.875°C
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| ADM1041 | 制造商:AD 制造商全称:Analog Devices 功能描述:Secondary-Side Controller with Current Share and Housekeeping |
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