參數(shù)資料
型號(hào): ADT7466ARQZ-REEL
廠商: ANALOG DEVICES INC
元件分類: 模擬信號(hào)調(diào)理
英文描述: dBCool Remote Thermal Controller and Voltage Monitor
中文描述: SPECIALTY ANALOG CIRCUIT, PDSO16
封裝: LEAD FREE, MO-137AB, QSOP-16
文件頁(yè)數(shù): 25/48頁(yè)
文件大小: 1269K
代理商: ADT7466ARQZ-REEL
ADT7466
CONFIGURING THE ADT7466 THERM PIN
AS AN OUTPUT
If PROCHOT monitoring is not required, Pin 7 can be config-
ured as a THERM output by setting Bits 1:0 of Configuration
Register 3 to 01. The user can preprogram system critical thermal
limits. If the temperature exceeds a thermal limit by 0.25°C,
THERM asserts low. If the temperature is still above the thermal
limit on the next monitoring cycle, THERM stays low. THERM
remains asserted low until the temperature is equal to or below
the thermal limit. Since the temperature for that channel is
measured only every monitoring cycle, once THERM asserts, it
is guaranteed to remain low for at least one monitoring cycle.
Rev. 0 | Page 25 of 48
The THERM pin can be configured to assert low if the TH1,
TH2, external or internal temperature THERM limits are
exceeded by 0.25°C. The THERM limit registers are at locations
0x1F, 0x20, 0x21, and 0x22, respectively.
Figure 32 shows how the THERM pin asserts low as an output
in the event of a critical overtemperature.
0
THERM 25
°
C
THERM LIMIT
TEMP
THERM
ADT7466
MONITORING
CYCLE
Figure 31. Asserting THERM as an Output Based on Tripping THERM Limits
0
7 6 5 4 3 2 1 0
25ms
50ms
200ms
800ms
3.2s
PROCHOT
SMBALERT
0 1 2 3 4 5 6 7
25ms
150ms
200ms
801.6s
3.2s
PROCHOT TIMER CLEARED
ON READ
PROCHOT TIMER
(REG. 0x0F)
PROCHOT LIMIT
(REG. 0x1E)
COMPARATOR
IN
OUT
LATCH
RESET
PHOT BIT 1
MASK REGISTER 2
(REG. 0x13)
1 = MASK
CLEARED ON
READ
STATUS
REGISTER 2
PCHT BIT (BIT 1)
Figure 32. Functional Diagram of the ADT7466 PROCHOT Monitoring Circuitry
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