MPFS250T datasheet(110/128 Pages) MICROCHIP

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6.9.4

Tamper Detectors

The following section describes tamper detectors.

Table 137 • ADC Conversion Rate

Unit

Max

Typ

Min

Description

Parameter

μs

470

350

Time from enable

changing from zero

TCONV1

to non-zero value

to first conversion

completes. Mini-

mum value applies

when POWEROFF =

μs

480

Time between sub-

sequent channel

conversions.

TCONVN

Data channel and

output to valid as-

TSETUP

serted. Data is held

until next conver-

sion completes,

that is >480 μs.

μs

2.5

1.5

Width of the valid

pulse.

TVALID

μs

Rate × 32

Time from start of

first set of conver-

TRATE

sions to the start of

the next set. Can be

considered as the

conversion rate. Is

set by the conver-

sion rate parame-

ter.

1. Min, typ, and max refer to variation due to functional configuration and the raw TVS value. The actual

internal correction time will vary based on the raw TVS value.

2. The pulse width varies depending on the time taken to complete the internal calibration multiplication,

this can be up to 375 ns.

Note: Once the TVS block is active, the enable signal is sampled 25 ns before the falling edge of valid. The

next enabled channel in the sequence 0-1-2-3 is started; that is, if channel 0 has just completed and only

channels 0 and 3 are enabled, the next channel will be 3. When all the enabled channels in the sequence

0-1-2-3 are completed, the TVS waits for the conversion rate timer to expire. The enable signal may be

changed at any time if it changes to 4’b0000 while valid is asserted (and 25 ns before valid is de-asserted),

then no further conversions will be started.

Table 138 • Temperature and Voltage Sensor Electrical Characteristics

Condition

Unit

Max

Typ

Min

Parameter

°C

125

–40

Temperature sens-

ing range

106

Microsemi Proprietary and Confidential. DS0147 Revision 1.0

AC Switching Characteristics

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