MAX1668
PRODUCTIONMultichannel Remote/Local Temperature Sensors
- Part Models
- 2
- 1ku List Price
- Starting From $4.80
Overview
- 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
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.
Applications
- Central Office Telecom Equipment
- Desktop/Notebook Computers
- Industrial Controls
- LAN Servers
- Multichip Modules
- Test and Measurement Equipment
Documentation
Data Sheet 1
Reliability Data 1
Design Note 1
Technical Articles 1
Device Drivers 1
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| MAX1668MEE+ | 16-QSOP-150_MIL | ||
| MAX1668MEE+T | 16-QSOP-150_MIL |
| Part Models | Product Lifecycle | PCN |
|---|---|---|
|
Jan 16, 2019 - 1746A ASSEMBLY |
||
| MAX1668MEE+ | PRODUCTION | |
| MAX1668MEE+T | PRODUCTION | |
This is the most up-to-date revision of the Data Sheet.
Software Resources
Device Drivers 1
Evaluation Software 0
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Hardware Ecosystem
| Parts | Product Life Cycle | Description |
|---|---|---|
| Analog to Digital Converters (ADCs) 2 | ||
| MAX1617 | PRODUCTION | Remote/Local Temperature Sensor with SMBus Serial Interface |
| MAX1805 | PRODUCTION | Multichannel Remote/Local Temperature Sensors |
| Fan Speed & Thermoelectric Cooler (TEC) Controllers 1 | ||
| MAX1669 | PRODUCTION | Fan Controller and Remote Temperature Sensor with SMBus Serial Interface |