- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄67801 > MAX6689UP9A+T (MAXIM INTEGRATED PRODUCTS INC) 7-Channel Precision Temperature Monitor PDF資料下載
參數(shù)資料
| 型號： | MAX6689UP9A+T |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 電源管理 |
| 英文描述： | 7-Channel Precision Temperature Monitor |
| 中文描述： | 7-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO20 |
| 封裝： | 4.40 MM, LEAD FREE, MO-153AC, TSSOP-20 |
| 文件頁數(shù)： | 8/19頁 |
| 文件大?。?/td> | 240K |
| 代理商： | MAX6689UP9A+T |
MAX6689
ADC Noise Filtering
The integrating ADC has good noise rejection for low-
frequency signals, such as power-supply hum. In envi-
ronments with significant high-frequency EMI, connect
an external 2200pF capacitor between DXP_ and
DXN_. Larger capacitor values can be used for added
filtering, but do not exceed 3300pF because it can
introduce errors due to the rise time of the switched
current source. High-frequency noise reduction is
needed for high-accuracy remote measurements.
Noise can be reduced with careful PCB layout as dis-
cussed in the PCB Layout section.
Slave Address
Table 11 shows the MAX6689 slave addresses.
PCB Layout
Follow these guidelines to reduce the measurement
error when measuring remote temperature:
1) Place the MAX6689 as close as is practical to the
remote diode. In noisy environments, such as a
computer motherboard, this distance can be 4in to
8in (typ). This length can be increased if the worst
noise sources are avoided. Noise sources include
CRTs, clock generators, memory buses, and PCI
buses.
2) Do not route the DXP-DXN lines next to the deflec-
tion coils of a CRT. Also, do not route the traces
across fast digital signals, which can easily intro-
duce +30°C error, even with good filtering.
3) Route the DXP and DXN traces in parallel and in
close proximity to each other. Each parallel pair of
traces should go to a remote diode. Route these
traces away from any higher voltage traces, such as
+12VDC. Leakage currents from PCB contamination
must be dealt with carefully since a 20M
Ω leakage
path from DXP to ground causes about +1°C error.
If high-voltage traces are unavoidable, connect
guard traces to GND on either side of the DXP-DXN
traces (Figure 5).
4) Route through as few vias and crossunders as pos-
sible to minimize copper/solder thermocouple
effects.
5) Use wide traces when practical. 5mil to 10mil traces
are typical. Be aware of the effect of trace resis-
tance on temperature readings when using long,
narrow traces.
6) When the power supply is noisy, add a resistor (up
to 47
Ω) in series with VCC.
7-Channel Precision Temperature Monitor
16
______________________________________________________________________________________
5–10 mils
MINIMUM
5–10 mils
GND
DXP
DXN
GND
Figure 5. Recommended DXP-DXN PCB Traces. The two outer
guard traces are recommended if high-voltage traces will be
near the DXN and DXP traces.
MANUFACTURER
MODEL NO.
Central Semiconductor (USA)
CMPT3904
Rohm Semiconductor (USA)
SST3904
Samsung (Korea)
KST3904-TF
Siemens (Germany)
SMBT3904
Zetex (England)
FMMT3904CT-ND
Table 10. Remote-Sensors Transistor
Manufacturer
Note: Discrete transistors must be diode connected (base
shorted to collector).
PART
SMBus SLAVE ID
PIN-PACKAGE
MAX6689EP34
0011 010
20 QSOP
MAX6689EP38
0011 100
20 QSOP
MAX6689EP9A
1001 101
20 QSOP
MAX6689EP9E
1001 111
20 QSOP
MAX6689UP34
0011 010
20 TSSOP
MAX6689UP38
0011 100
20 TSSOP
MAX6689UP9A
1001 101
20 TSSOP
MAX6689UP9E
1001 111
20 TSSOP
Table 11. Slave Address
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MAX668EUB+ | 1.8V to 28V Input, PWM Step-Up Controllers in µMAX |
| MAX668EUB+T | 1.8V to 28V Input, PWM Step-Up Controllers in µMAX |
| MAX669EUB+ | 1.8V to 28V Input, PWM Step-Up Controllers in µMAX |
| MAX669EUB+T | 1.8V to 28V Input, PWM Step-Up Controllers in µMAX |
| MAX6690MEE+T | 2°C Accurate Remote/Local Temperature Sensor with SMBus Serial Interface |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX6689UP9E | 制造商:Maxim Integrated Products 功能描述:7-CHANNEL PRECISION TEMPERATURE MONITOR - Rail/Tube |
| MAX6689UP9E-T | 制造商:Maxim Integrated Products 功能描述:7-CHANNEL PRECISION TEMPERATURE MONITOR - Tape and Reel |
| MAX668EUB | 功能描述:電流型 PWM 控制器 1.8V to 28V Step-Up RoHS:否 制造商:Texas Instruments 開關(guān)頻率:27 KHz 上升時間: 下降時間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數(shù)量:1 最大工作溫度:+ 105 C 安裝風格:SMD/SMT 封裝 / 箱體:TSSOP-14 |
| MAX668EUB | 制造商:Maxim Integrated Products 功能描述:PWM STEP UP CONTROLLER SMD SOIC10 |
| MAX668EUB+ | 功能描述:電流型 PWM 控制器 1.8V to 28V Step-Up RoHS:否 制造商:Texas Instruments 開關(guān)頻率:27 KHz 上升時間: 下降時間: 工作電源電壓:6 V to 15 V 工作電源電流:1.5 mA 輸出端數(shù)量:1 最大工作溫度:+ 105 C 安裝風格:SMD/SMT 封裝 / 箱體:TSSOP-14 |
發(fā)布緊急采購，3分鐘左右您將得到回復。