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AS3931

Datasheet - Electrical Character i s t ics

TDVCH

Data valid to pos. Clock

edge

11

100

ns

TCHDI

pos. Clock edge to Data

invalid

11

100

ns

TSHCH

Select active to pos. Clock

edge

11

100

ns

TCHSL

pos. Clock to Select

inactive

11

100

ns

TSL

Select low time

11

500

ns

3. Code word can be changed by metal option

4. 8 preamble half-bits are equivalent to 4 manchester bits

5. VREG output may not be used as a supply for other circuits

6. This is the internal Power on Reset time generated by the chip. To ensure proper start-up conditions, the supply voltage VCC must be

ramped up to its final value during TPOR

7. This is the additional operating current when the RSSI buffer is activated without load

8.

chip take some time to recover for working properly again. The maximum step value is listed.

9. Crystal tolerance: 100ppm

10.Values refer to production test

12.The RSSI step is the change of the RSSI output voltage when the input signal amplitude changes from 0 to specified value

13.Time to step from initial RSSI value to 95% of the final value

14.ChA may be any channel 1 – 3, whereas ChB may be any other remaining channel.

Table 3. Electrical Characteristics

Symbol

Parameter

Conditions

Min

Typ

Max

Units