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MAX1668, MAX1805, MAX1989
マルチチャネル、リモ―ト/ロ―カル温度センサ
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ステータス
入手可能：生産中
製品概要
The MAX1668/MAX1805/MAX1989 are precise multichannel digital thermometers that report the temperature of all remote sensors and their own packages. The remote sensors are diode-connected transistors—typically low-cost, easily mounted 2N3904 NPN types—that replace conventional thermistors or thermocouples. Remote accuracy is ±3°C for multiple transistor manufacturers, with no calibration needed. The remote channels can also measure the die temperature of other ICs, such as microprocessors, that contain an on-chip, diode-connected transistor.
The 2-wire serial interface accepts standard system management bus (SMBus™) write byte, read byte, send byte, and receive byte commands to program the alarm thresholds and to read temperature data. The data format is 7 bits plus sign, with each bit corresponding to 1°C, in two's-complement format.
The MAX1668/MAX1805/MAX1989 are available in small, 16-pin QSOP surface-mount packages. The MAX1989 is also available in a 16-pin TSSOP.
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データシート
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評価キットが入手可能です： MAX1668EVSYS
主な特長
- Multichannel
- 4 Remote, 1 Local (MAX1668/MAX1989)
- 2 Remote, 1 Local (MAX1805)
- No Calibration Required
- SMBus 2-Wire Serial Interface
- Programmable Under/Overtemperature Alarms
- Supports SMBus Alert Response
- Accuracy
- ±2°C (+60°C to +100°C, Local)
- ±3°C (-40°C to +125°C, Local)
- ±3°C (+60°C to +100°C, Remote)
- 3µA (typ) Standby Supply Current
- 700µA (max) Supply Current
- Small, 16-Pin QSOP/TSSOP Packages
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アプリケーション/用途
- 電話局テレコム機器
- デスクトップ/ノートブックコンピュータ
- 産業用制御
- LANサーバ
- マルチチップ・モジュール
- 試験および測定機器
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主な仕様：
| Temperature Sensors |
| Part Number |
Sensor Type |
Alarm Output |
Functions |
Interface |
Remote Chan. |
Accuracy
(±°C) |
Parasite Pwr. |
Temp. Resolution
(bits) |
Oper. Temp.
(°C) |
Smallest Available Pckg.
(mm2) |
Budgetary Price |
| max w/pins |
See Notes |
| MAX1668 |
Remote |
Alert |
Remote & Local Sensor |
2-Wire/I2C/SMBus |
Quad |
2 |
No |
8 |
-55 to +125 |
30.9 |
$4.32 @1k |
| MAX1805 |
Dual |
30.9 |
$3.93 @1k |
| MAX1989 |
Quad |
33.4 |
$4.60 @1k |
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全Temperature Sensors (103)
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Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific prices and delivery, please see the price and availability page or contact an authorized distributor.
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図
標準動作回路
その他の情報
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情報インデックス
参考文献： 19-1766
Rev 2;
2003-06-06
このページの最終更新日： 2010-05-10
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