LTC7103 datasheet(7/48 Pages) AD

7 / 48 page

LTC7871

Rev. 0

For more information www.analog.com

ELECTRICAL CHARACTERISTICS The

denotes the specifications which apply over the full operating

temperature range, otherwise specifications are at TA = 25°C, VHIGH = 48V, VRUN = 5V unless otherwise noted. (Note 2)

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

SPI Interface Timing Characteristics (Refer to Timing Diagram in Figure 9 and 10)

tCKH

SCLK High Time

tCSS

CSB Setup Time

tCSH

CSB High Time

tCS

SDI to SCLK Setup Time

tCH

SDI to SCLK Hold Time

tDO

SCLK to SDO Time

tC%

SCLK Duty Cycle

fSCLK(MAX)

Maximum SCLK Frequency

MHz

Note 1: Stresses beyond those listed under Absolute Maximum Ratings

may cause permanent damage to the device. Exposure to any Absolute

Maximum Rating condition for extended periods may affect device

reliability and lifetime.

Note 2: The LTC7871 is tested under pulsed load conditions such that

TJ ≈ TA. The LTC7871E is guaranteed to meet performance specifications

from 0°C to 85°C junction temperature. Specifications over the –40°C

to 125°C operating junction temperature range are assured by design,

characterization and correlation with statistical process controls. The

LTC7871I is guaranteed over the –40°C to 125°C operating junction

temperature range. The LTC7871J is guaranteed over the –40°C to 150°C

operating junction temperature range. The LTC7871H is guaranteed

over the full –40°C to 150°C operating junction temperature range. High

junction temperature degrades operating lifetimes; operating lifetime

is derated for junction temperatures greater than 125°C. Note that the

maximum ambient temperature consistent with these specifications is

determined by specific operating conditions in conjunction with board

layout, the rated package thermal impedance and other environmental

factors.

Note 3: TJ is calculated from the ambient temperature TA and power

dissipation PD according to the following formula:

TJ = TA + (PD • 17°C/W)

Note 4: The LTC7871 is tested in a feedback loop that servos VITHHIGH

and VITHLOW to a specified voltage and measures the resultant VFBHIGH,

VFBLOW, respectively.

Note 5: Dynamic supply current may be higher due to the loading current

at DRVCC linear regulator.

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