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參數資料
| 型號： | MAX6622UE9A+T |
| 廠商： | Maxim Integrated |
| 文件頁數： | 8/18頁 |
| 文件大?。?/td> | 196K |
| 描述： | IC PREC TEMP MONITOR 5CH 16TSSOP |
| 產品培訓模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標準包裝： | 2,500 |
| 功能： | 溫度監控系統（傳感器） |
| 傳感器類型： | 內部和外部 |
| 感應溫度： | -40°C ~ 125°C，外部傳感器 |
| 精確度： | -0.1°C 本地，±3°C 遠程 |
| 拓撲： | ADC，緩沖器，寄存器庫 |
| 輸出類型： | SMBus? |
| 輸出警報： | 是 |
| 輸出風扇： | 是 |
| 電源電壓： | 3 V ~ 5.5 V |
| 工作溫度： | -40°C ~ 125°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 16-TSSOP（0.173"，4.40mm 寬） |
| 供應商設備封裝： | 16-TSSOP |
| 包裝： | 帶卷 (TR) |
conversion results until they have been read. If the most
significant bits have not been read within an SMBus
timeout period (nominally 37ms), normal updating con-
tinues. Table 1 shows the main temperature register
(high byte) data format, and Table 2 shows the extend-
ed resolution register (low byte) data format.
Diode Fault Detection
If a channels input DXP_ and DXN_ are left open, the
MAX6622 detects a diode fault. An open diode fault
does not cause either ALERT or OVERT to assert. A bit in
the status register for the corresponding channel is set to
1 and the temperature data for the channel is stored as
all 1s (FFh). It takes approximately 4ms for the MAX6622
to detect a diode fault. Once a diode fault is detected,
the MAX6622 goes to the next channel in the conversion
sequence. Depending on operating conditions, a short-
ed diode may or may not cause ALERT or OVERT to
assert, so if a channel will not be used, its DXN and DXP
inputs should be left unconnected.
5-Channel Precision Temperature Monitor
8 _______________________________________________________________________________________
Write Byte Format
Read Byte Format
Send Byte Format
Receive Byte Format
SLAVE ADDRESS: EQUIVALENT
TO CHIP-SELECT LINE OF A
3-WIRE INTERFACE
COMMAND BYTE: SELECTS TO
WHICH REGISTER YOU ARE
WRITING
DATA BYTE: DATA GOES INTO THE REGISTER
SET BY THE COMMAND BYTE (TO SET
THRESHOLDS, CONFIGURATION MASKS, AND
SAMPLING RATE)
SLAVE ADDRESS: EQUIVALENT
TO CHIP-SELECT LINE
COMMAND BYTE: SELECTS
FROM WHICH REGISTER YOU
ARE READING
SLAVE ADDRESS: REPEATED
DUE TO CHANGE IN DATA-
FLOW DIRECTION
DATA BYTE: READS FROM
THE REGISTER SET BY THE
COMMAND BYTE
COMMAND BYTE: SENDS COM-
MAND WITH NO DATA, USUALLY
USED FOR ONE-SHOT COMMAND
DATA BYTE: READS DATA FROM
THE REGISTER COMMANDED BY
THE LAST READ BYTE OR WRITE
BYTE TRANSMISSION; ALSO
USED FOR SMBus ALERT
RESPONSE RETURN ADDRESS
S = START CONDITION.
SHADED = SLAVE TRANSMISSION.
P = STOP CONDITION.
/// = NOT ACKNOWLEDGED.
S
ADDRESS
RD
ACK
DATA
///
P
7 bits
8 bits
WR
S
ACK
COMMAND
ACK
P
8 bits
ADDRESS
7 bits
P
1
ACK
DATA
8 bits
ACK
COMMAND
8 bits
ACK
WR
ADDRESS
7 bits
S
S
ADDRESS
WR
ACK
COMMAND
ACK
S
ADDRESS
7 bits
8 bits
7 bits
RD
ACK
DATA
8 bits
///
P
Figure 2. SMBus Protocols
TEMP (癈)
DIGITAL OUTPUT
> +127
0111 1111
+127
0111 1111
+126
0111 1110
+25
0001 1001
0
0000 0000
< 0
0000 0000
Diode fault (open)
1111 1111
Diode fault (short)
1111 1111 or 1110 1110
Table 1. Main Temperature Register
(High-Byte) Data Format
TEMP (癈)
DIGITAL OUTPUT
0
000X XXXX
+0.125
001X XXXX
+0.250
010X XXXX
+0.375
011X XXXX
+0.500
100X XXXX
+0.625
101X XXXX
+0.725
110X XXXX
+0.875
111X XXXX
Table 2. Extended Resolution Temperature
Register (Low-Byte) Data Format
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