FEDL7066-01

ML7066

15/29

Recommneded Operation Conditions

Item

Symbol

Condition

Min.

Typ.

Max.

Unit

Power supply voltage (I/O)

VDDIO pin

(*3)

2.1

3.0

3.6

V

Power supply voltage (RF)

(*2) (*4)

RX

1.95

2.1

2.3

V

(*2) (*4)

TX

1.92

2.1

2.3

V

Regulator input voltage

VREG_IN Pin

(*3)

2.1

3.0

3.6

V

Operating temperature

—

-25

+25

+65

℃

Digital input rise time

Digital input pins (*5)

—

—

20

ns

Digital input fall time

Digital input pins (*5)

—

—

20

ns

Digital output load

All digital output pins

—

—

20

pF

Master clock

XI pin (*20)

-4ppm

19.2

+4ppm

MHz

Master clock duty ratio

XI pin

45

50

55

%

Sub clock

EXTCLK pin (*21)

-80ppm

32.768

+80ppm

kHz

Sub clock duty ratio

EXTCLK pin

40

50

60

%

SCI clock input frequency

SCLK pin

0.1

2

8

MHz

SCI clock input duty ratio

SCLK pin

45

50

55

%

RF channel frequency1

RF_OUT pin, RF_IN pin

12.5kHz interval

426.0250

—

426.8375

MHz

RF channel frequency2

RF_OUT pin, RF_IN pin

12.5kHz interval

429.1750

—

429.9250

MHz

*4: The VREG_OUT pin should be connected to each RF power supply pin.

*20: The input clock frequency deviation is shown in the following table.

*21: Reference value. The frequency accuracy of the sub clock only affects timers, and does not matter for the transmit/receive

operation.

Table:Example of Input Clock Frequency and Receive Characteristics

Reference clock

frequency accuracy

21.4MHz quartz filter (BPF)

characteristics

455kHz ceramic filter (BPF) characteristics

±4ppm

±10ppm

±20ppm

±40ppm

±60ppm

±6kHz

±6kHz

±6kHz

±6kHz

±6kHz

±6.0kHz

±7.5kHz

±7.5kHz

±7.5kHz

±7.5kHz

You can use the PLL frequency adjustment function provided in this LSI to support a reference clock frequency with an accuracy

worse than ±4ppm. When the accuracy of the reference clock frequency is worse than ±4ppm, you can adjust it to ensure the required

frequency accuracy by the PLL frequency adjustment function.

In terms of the receive characteristics, the bandwidth of the external filter should be wide as shown in this table if the accuracy of the

source reference clock frequency is worse than ±4ppm, which degrades the C/I characteristics.

In this table, the reference clock frequency accuracy includes the center frequency and the temperature variation.

The temperature variation of the reference clock frequency is uniformly assumed to be ±20ppm.