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Active: In Production.

Data Sheet

FULL DATA SHEET (PDF, 296kB) Download   E-Mail

Description

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.

An evaluation kit is available:  MAX1668EVSYS  

Key Features		Applications/Uses
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		Central Office Telecom Equipment Desktop/Notebook Computers Industrial Controls LAN Servers Multichip Modules Test and Measurement Equipment

Diagram

Typical Operating Circuit

Application Notes

Application Note 687: Distributed Temperature Sensing Improves Reliability - MAX1668 Application Note 694: Temperature Sensor ICs Simplify Designs - MAX1668

Evaluation Kits

MAX1668EVSYS

Design Guides

Thermal Management (PDF)

Reliability Reports

Reliability Report: MAX1668.pdf Show FIT data for: MAX1668 MAX1805 MAX1989 Request Reliability Report for: MAX1805 MAX1989

Software/Models

none

Ordering Information

Notes: Other options and links for purchasing parts are listed at: http://www.maxim-ic.com/sales. Didn't Find What You Need? Ask our applications engineers. Expert assistance in finding parts, usually within one business day. Part number suffixes: T or T&R = tape and reel;+ = RoHS/lead-free;# = RoHS/lead-exempt. More: SeeFull Data Sheet or Part Naming Conventions. * Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.

Devices: 1-17 of 17

MAX1668	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX1668EVKIT			Active	Land Pattern: Not Available		See data sheet
MAX1668MEE			Active	QSOP;16 pin;31 mm² Outline Drawing: 21-0055 (PDF) Land Pattern: 90-0167 (PDF) Use pkgcode/variation: E16-1*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX1668MEE-T			Active	QSOP;16 pin;31 mm² Outline Drawing: 21-0055 (PDF) Land Pattern: 90-0167 (PDF) Use pkgcode/variation: E16-1*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX1668MEE+			Active	QSOP;16 pin;31 mm² Outline Drawing: 21-0055 (PDF) Land Pattern: 90-0167 (PDF) Use pkgcode/variation: E16+1*	-55°C to +125°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX1668MEE+T			Active	QSOP;16 pin;31 mm² Outline Drawing: 21-0055 (PDF) Land Pattern: 90-0167 (PDF) Use pkgcode/variation: E16+1*	-55°C to +125°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX1805	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX1805MEE+			Active	QSOP;16 pin;31 mm² Outline Drawing: 21-0055 (PDF) Land Pattern: 90-0167 (PDF) Use pkgcode/variation: E16+1*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX1805MEE+T			Active	Land Pattern: Not Available	-40°C to +85°C	See data sheet
MAX1805MEE			Active	QSOP;16 pin;31 mm² Outline Drawing: 21-0055 (PDF) Land Pattern: 90-0167 (PDF) Use pkgcode/variation: E16-1*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX1805MEE-T			Active	Land Pattern: Not Available	-40°C to +85°C	See data sheet
MAX1989	Free Sample	Buy	Status	Package: TYPE PINS FOOTPRINT   DRAWING CODE/VAR *	Temp	RoHS/Lead-Free? Materials Analysis
MAX1989MEE			Active	QSOP;16 pin;31 mm² Outline Drawing: 21-0055 (PDF) Land Pattern: 90-0167 (PDF) Use pkgcode/variation: E16-1*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX1989MEE-T			Active	Land Pattern: Not Available	-40°C to +85°C	See data sheet
MAX1989MEE+			Active	QSOP;16 pin;31 mm² Outline Drawing: 21-0055 (PDF) Land Pattern: 90-0167 (PDF) Use pkgcode/variation: E16+1*	-55°C to +125°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX1989MEE+T			Active	QSOP;16 pin;31 mm² Outline Drawing: 21-0055 (PDF) Land Pattern: 90-0167 (PDF) Use pkgcode/variation: E16+1*	-55°C to +125°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX1989MUE			Active	TSSOP;16 pin;33 mm² Outline Drawing: 21-0066 (PDF) Land Pattern: 90-0117 (PDF) Use pkgcode/variation: U16-2*	-40°C to +85°C	RoHS/Lead-Free: No Materials Analysis
MAX1989MUE-T			Active	Land Pattern: Not Available	-40°C to +85°C	See data sheet
MAX1989MUE+			Active	TSSOP;16 pin;33 mm² Outline Drawing: 21-0066 (PDF) Land Pattern: 90-0117 (PDF) Use pkgcode/variation: U16+2*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis
MAX1989MUE+T			Active	TSSOP;16 pin;33 mm² Outline Drawing: 21-0066 (PDF) Land Pattern: 90-0117 (PDF) Use pkgcode/variation: U16+2*	-40°C to +85°C	RoHS/Lead-Free: Lead Free Materials Analysis

More Information

New Product Press Release 2002-08-07  Temperature Family by Product Type

Related Products

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