Datasheet LTC3337 (Analog Devices) - 5

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ELECTRICAL CHARACTERISTICS The
l
denotes the specifications which apply over the full operating junction temperature range, otherwise specifications are at TA = 25°C. (Note 2). BAT_IN = BAT_OUT = AVCC = DVCC = 3.6V unless otherwise noted. PARAMETER CONDITIONS MIN TYP MAX UNITS
Bus Free Time Between STOP/START tBUF 1.3 µs Repeated START Set-Up Time tSU,STA 600 ns Hold Time (Repeated) START Condition tHD,STA 600 ns Set-Up Time for STOP Condition tSU,STO 600 ns Data Set-Up Time (Input) tSU,DAT 100 ns Data Hold Time (Input) tHD,DATI 0 µs Data Hold Time (Output) tHD,DATO 0 0.9 µs Clock/Data Fall Time tf 20 300 ns Clock/Data Rise Time tr 20 300 ns Clock LOW Period tLOW 1.3 µs Clock HIGH Period tHIGH 0.6 µs Spike Suppression Time tSP 50 ns
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings are at their best down to 1.8V. See Extended Battery Range Below 2V in may cause permanent damage to the device. Exposure to any Absolute the Operation section. Maximum Rating condition for extended periods may affect device
Note 5:
The equivalent charge of an LSB in the accumulated charge reliability and lifetime. register depends on the IPEAK setting and the internal prescaling factor
Note 2:
The LTC3337 is tested under pulsed load conditions such that M. See Choosing the Coulomb Counter Prescaler M section for more TJ ≈ TA. The specifications over the –40°C to125°C operating junction information. Note that: temperature range are assured by design, characterization, and correlation 1mA • hr = 3.6A • s = 3.6C. with statistical process controls. Note that the maximum ambient temperature consistent with these specifications is determined by specific
Note 6:
The specified accuracy of qLSB in percent is better than that operating conditions in conjunction with board layout, the rated package of the corresponding IPEAK because the timebase used for calculating thermal impedance, and other environmental factors. coulombs is internally adjusted to compensate for errors in the actual
Note 3:
T IPEAK value. The Total Coulomb Counter Error specified includes any J is calculated from the ambient TA and power dissipation PD according to the following formula: T inaccuracy in qLSB. J = TA + (PD • θJA).
Note 4:
Coulomb counter and peak current limit accuracy are at their best
Note 7:
This parameter is production tested only for the 100mA IPEAK for BAT_IN voltages above 2V. Voltage and Temperature Monitor accuracy setting. For the other IPEAK settings it is guaranteed by extension due to the internal design architecture and operation.
TIMING DIAGRAM
SDA tLOW tSU,DAT tHD,STA tBUF tf t t r tf SP tr SCL tHD,STA tSU,STA tSU,STO S tHD,DAT tHIGH Sr P S 3337 TD S = START, Sr = REPEATED START, P = STOP
Figure 1. Definition of Timing on I2C Bus
Rev. 0 For more information www.analog.com 5 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Electrical Characteristics Timing Diagram Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Typical Applications Related Parts