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参数资料
| 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： | 16/40页 |
| 文件大小： | 1318K |
| 代理商： | ADM1034ARQZ-REEL |
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ADM1034
Rev. 0 | Page 23 of 40
FAN_FAULT OUTPUT
The FAN_FAULT output signals when one or both of the fans
stall. Pin 8, the FAN_FAULT output, is a dual-function pin. It
defaults to being a FAN_FAULT output but can be reconfigured
as an analog input reference for the THERM input. To do this,
set the FAN_FAULT/REF (Bit 7) in Configuration Register 4
(Address 0x04) to 1.
FAULT QUEUE
The ADM1034 has a programmable fault queue option that lets
the user program the number of out-of-limit measurements
allowable before generating an ALERT. The fault queue affects
only temperature measurement channels and is only operational
in SMBusALERT mode. It performs some simple filtering,
which is particularly useful at the higher conversion rates (16,
32, and 64 conversions/second), where averaging is not carried
out.
There is a queue for each of the temperature channels. If L (the
number programmed to the fault queue) or more consecutive
out-of-limit readings are made on the same temperature
channel, the fault queue fills, and the SMBusALERT output
triggers. To fill the fault queue, one needs L or more consecutive
out of limits on the internal temperature channel; L or more
consecutive out-of-limits on the external 1 temperature channel;
or L or more consecutive out-of-limits on the external 2 temp-
erature channel. The fault queue is independent of the state of
the bits in the ALERT status registers.
Table 22. Fault Queue Address 0x06
Bits <3:0>
Fault Queue
000X
1
001X
2
01XX
3
1XXX
4
To reset the fault queue, do one of the following:
SMBus ARA Command
Read Status Register 1
Power-On Reset
The SMBusALERT clears, even if the condition that caused the
SMBusALERT remains. The SMBusALERT is reasserted if the
fault queue fills up.
CONVERSION RATE REGISTER
The ADM1034 makes up to 64 measurements per second.
However, for the sake of reduced power consumption and better
noise immunity, users may run the ADM1034 at a slower
conversion rate. Better noise immunity results from the
averaging that occurs at the slower conversion rates. Averaging
does not occur at rates of 16, 32, or 64 conversions per second.
Table 23 lists the available conversion rates. Note that the
current round-robin loop must be finished for conversion rates
changes to take effect.
The conversion rate register is located at Address 0x05.
Table 23. Conversion Rates
Code
Conversion Rate
0x00
0.0625
0x01
0.125
0x02
0.25
0x03
0.5
0x04
1
0x05
2
0x06
4
0x07
8
0x08
16
0x09
32
0x0A
64
0x0B to 0xFF
Reserved
THERM I/O TIMER AND LIMITS
Pin 7 can be configured as either an input or output. As an
output it is asserted low to signal that the measured temperature
has exceeded preprogrammed temperature limits. The output is
automatically pulled high again when the temperature falls
below the THERM – Hys limit. The value of hysteresis is
programmable in Register 0x1A. THERM is enabled as an
output by default on power-up.
04918-0-031
TEMPERATURE
LIMITS
TIME
THERM, 85
°C
THERM
THERM-HYST,
80
°C
Figure 33. THERM Behavior
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| ADM1041A | 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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