DS2437S/T&R

DS2437S/T&R Datasheet


DS2437 Smart Battery Monitor

Part Datasheet
DS2437S/T&R DS2437S/T&R DS2437S/T&R (pdf)
Related Parts Information
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DS2437 Smart Battery Monitor

Unique interface requires only one

PIN ASSIGNMENT
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-ofdischarge determination On-board integrated current accumulator

VSENS+

VSENS-

AGND
16 VDD 15 NC 14 NC 13 X1 12 NC 11 X2 10 NC
9 GND
16-PIN SSOP See Mech. Drawings Section
facilitates gas gauging Real-time clock in binary format 40-byte nonvolatile user memory available for storage of user data such as gas gauge and manufacturing information Operating range -40°C to +85°C Applications include portable computers, portable/cellular phones, consumer electronics, and handheld instrumentation

PIN DESCRIPTION
- Data In/Out
- General A/D input

VSENS+ - Battery current monitor input +

VSENS- - Battery current monitor input -
- No connect
- Digital Ground

AGND - Analog Ground
- Connection for kHz XTAL
- Connection for kHz XTAL
- Power Supply 2.7V to 10.0V

The DS2437 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 a real-time clock and 40 bytes of nonvolatile EEPROM
memory for storage of important parameters such as battery capacity, capacity remaining, and indication
of battery cycling.

Information is sent to/from the DS2437 over a 1-Wire interface, so that only one wire and ground needs to be connected from a central microprocessor to a DS2437. This means that battery packs need only have three output connectors battery power, ground, and the 1-Wire interface.

Because each DS2437 contains a unique silicon serial number, multiple DS2437s can exist on the same 1-Wire bus. This allows multiple battery packs to be charged or used in the system simultaneously.
1 of 31
070600

DS2437

DETAILED PIN DESCRIPTION

SYMBOL DESCRIPTION

Data Input/Out for 1-Wire operation open drain

VAD ADC Input for general purpose A/D

VSENS+ Battery Input connection for battery current to be monitored see text

VSENS- Battery Input connection for battery current to be monitored see text

AGND Analog Ground must be at the same potential as GND
More datasheets: 1430-22-1-0500-002-1-TS | 1430-22-1-0500-001-1-TS | 1430-22-1-0500-005-1-TS | 1430-22-1-0500-003-1-TS | 1430-22-1-0500-010-1-TS | 1430-22-1-0500-007-1-TS | 1430-22-1-0500-006-1-TS | 1430-22-1-0500-004-1-TS | 1430-22-1-0500-011-1-TS | 1430-22-1-0500-008-1-TS


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Datasheet ID: DS2437S/T&R 508394