DS2438AZ+T&R by Analog Devices

Smart Battery Monitor

Status: Active
Series: DS2438
RoHS: Unknown
View Datasheet Manufacturer Site View Pricing & Stock

The DS2438 remains in production, however, for new projects, we recommend ModelGauge m5 MAX17215 fuel gauge. The DS2438 smart battery monitor provides several functions that are desirable to carry in a battery pack: a means of tagging a battery pack with a unique serial number, a direct-to-digital temperature sensor which eliminates the need for thermistors in the battery pack, an A/D converter which measures the battery voltage and current, an integrated current accumulator which keeps a running total of all current going into and out of the battery, an elapsed time meter, and 40 bytes of nonvolatile EEPROM memory for storage of important parameters such as battery chemistry, battery capacity, charging methodology and assembly date. Information is sent to/from the DS2438 over a 1-Wire® interface, so that only one wire (and ground) needs to be connected from a central microprocessor to a DS2438. This means that battery packs need only have three output connectors: battery power, ground, and the 1-Wire interface. Because each DS2438 contains a unique silicon serial number, multiple DS2438s can exist on the same 1-Wire bus. This allows multiple battery packs to be charged or used in the system simultaneously. Applications for the smart battery monitor include portable computers, portable/cellular telephones, and handheld instrumentation battery packs in which it is critical to monitor real-time battery performance. Used in conjunction with a microcontroller in the host system, the DS2438 provides a complete smart battery pack solution that is fully chemistry-independent. The customization for a particular battery chemistry and capacity is realized in the code programmed into the microcontroller and DS2438 EEPROM, and only a software revision is necessary should a designer wish to change battery pack chemistry.

Prices starting from US$3.95


Distributor Starting From Stock
Logo for Newark Electronics Newark Electronics US$4.15
4,363
Buy Now
Logo for element14 element14 US$4.13
4,363
Buy Now
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Features

Unique 1-Wire interface requires only one port pin for communication
Provides unique 64-bit serial number to battery packs
Eliminates thermistors by sensing battery temperature on-chip
On-board A/D converter allows monitoring of battery voltage for end-of-charge and end-of-discharge determination
On-board integrated current accumulator facilitates fuel gauging
Elapsed time meter in binary format
40-byte nonvolatile user memory available for storage of battery-specific data
Operating range -40°C to +85°C

Specifications

Functions Fuel GaugeStatus Monitor
Battery Type 1-2 Cell Li-Ion2-6 Cell NiMH
Interface 1-Wire
User Data Storage (Bytes) 40 EEPROM
Parameters Measured CurrentTemperatureTimeVoltage
End Equipment Pack
VSUPPLY (V) (min) 2.4
VSUPPLY (V) (max) 10
Package/Pins SOIC (N)/8
Oper. Temp. (°C) -40 to +85
BudgetaryPrice (See Notes) 3.18


DS2438AZ+T&R Semiconductors - ICs by Analog Devices

BATT MONITOR LI-ION/NICD/NIMH NSOIC-8

Status: Unknown
Series: -
RoHS: Unknown
View Datasheet Manufacturer Site View Pricing & Stock

Specifications

Battery Type Li-Ion NiCd NiMH
IC Interface Type Serial
No. of Batteries 1
Supply Voltage Min 2.4V
Supply Voltage Max 10V
Battery IC Case Style NSOIC
No. of Pins 8Pins
Operating Temperature Min -40°C
Operating Temperature Max 85°C
Product Range -
Automotive Qualification Standard -
RoHS Phthalates Compliant To Be Advised
MSL MSL 1 - Unlimited
SVHC No SVHC (15-Jan-2018)

Alternative Descriptions

Battery Monitor, Li-Ion/Nicd/Nimh, Nsoic | Newark Electronics
BATT MONITOR, LI-ION/NICD/NIMH, NSOIC-8 | element14

Frequently Asked Questions

Where can I find additional details, specifications and documents for a DS2438AZ+T&R ?

Additional datasheets, footprints and schematics for DS2438AZ+T&R are listed on our Part Details page. You can also find images and similar parts to DS2438AZ+T&R on this page.

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Is the DS2438AZ+T&R RoHS compliant?

This part has not been flagged as RoHS Compliant.

Which authorised distributors for DS2438AZ+T&R have stock available?

Authorised distributors including Newark Electronics, element14 and Farnell have stock available or on a lead time for DS2438AZ+T&R .

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