8

4779N–ISM–12/08

ATR2406

8

Synthesizer

8.1

External reference input

frequency

D7 = 0

D7 = 1

REF_CLK

10.368

13.824

MHz

MHz

8.2

Sinusoidal input signal level

(peak-to-peak value)

AC-coupled sine wave

REF_CLK

500

1000

mV

PP

8.3

Scaling factor prescaler

S

PSC

32/33

-

8.4

Scaling factor main counter

S

MC

86/87/88/89

-

8.5

Scaling factor swallow counter

031

-

9

Phase Detector

9.1

Phase detector comparison

frequency

f

PD

1728

kHz

10

Charge-pump Output

10.1

Charge-pump output current

V

I

CP

±2

mA

10.2

Leakage current

±100

1000

pA

11

11.1

Transmit to receive time

Reference clock stable

TX

→ RX time

200

µs

11.2

Receive to transmit time

Reference clock stable

RX

→ TX time

200

µs

11.3

Channel switch time

Reference clock stable

CS time

200

µs

11.4

Power down to transmit

Reference clock stable

PD

→ TR time

250

µs

11.5

Power down to receive

Reference clock stable

PD

→ RX time

200

µs

11.6

Programming register

Reference clock stable

PRR time

3

µs

11.7

PLL settling time

Reference clock stable

PLL set time

200

µs

12

Interface Logic Input and Output Signal Levels, Pin DATA, CLOCK, ENABLE

12.1

HIGH-level input voltage

Logic 1

V

IH

1.4

3.1

V

12.2

LOW-level input voltage

Logic 0

–0.3

+0.4

V

12.3

HIGH-level output voltage

Logic 1

3.1

V

12.4

LOW-level output voltage

Logic 0

V

OL

0V

12.5

Input bias current

Logic 1 or logic 0

–5

+5

µA

12.6

3-wire bus clock frequency

10

MHz

6.

Electrical Characteristics (Continued)

No.

Parameters

Test Conditions

Symbol

Min.

Typ.

Max.

Unit

Notes:

quency (Smart RF) firmware. Conducted measured.

2. Timing is determined by external loop filter characteristics. Faster timing can be achieved by modification of the loop filter.

For further information refer to the application notes.

3. The Gaussian filter control setting (GFCS) is used to compensate production tolerances by tuning the modulation deviation

in production to the nominal value of 400 kHz.

4. Burst mode with 0.9% duty cycle