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Electrical characteristics: general (continued) – Rainbow Electronics ATA5746 User Manual

Page 35

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35

4596A–RKE–05/06

ATA5745/ATA5746 [Preliminary]

f

RF

= 433.92 MHz

CLK_OUT division ratio
= 3
= 6
= 12
CLK_OUT has nominal
50% duty cycle

3

f

CLK_OUT

4.52458
2.26229
1.13114

MHz

D

f

RF

= 315 MHz

CLK_OUT division ratio
= 3
= 6
= 12
CLK_OUT has nominal
50% duty cycle

3

f

CLK_OUT

4.3811

2.190

1.0952

MHz

D

4.10 DC voltage after startup

V

DC

(XTAL1, XTAL2)

XTO running (Standby
mode, Active mode)

7,8

V

DCXTO

–250

–45

mV

C

5

Synthesizer

5.1

Spurs in Active mode

At ±f

CLK_OUT

,

CLK_OUT enabled
(division ratio = 3)
f

RF

= 315 MHz

f

RF

= 433.92 MHz

SP

RX

–75

–70

dBC

C

at ±f

XTO

f

RF

= 315 MHz

f

RF

= 433.92 MHz

SP

RX

–75

–70

dBC

A

5.2

Phase noise at 3 MHz
Active mode

f

RF

= 315 MHz

f

RF

= 433.92 MHz

L

RX3M

–130

–127

dBC/Hz

A

5.3

Phase noise at 20 MHz
Active mode

Noise floor

L

RX20M

–135

–132

dBC/Hz

B

6

Microcontroller Interface

6.1

CLK_OUT output rise and
fall time

f

CLK_OUT

< 4.5 MHz

C

L

= 10 pF

C

L

= Load capacitance on

pin CLK_OUT
2.7V

≤ V

VS5V

≤ 3.3V or

4.5V

≤ V

VS5V

≤ 5.5V

20% to 80% V

VS5V

3

t

rise

t

fall

20

20

30

30

ns

ns

B

6.2

Internal equivalent
capacitance

Used for current
calculation

3

C

CLK_OUT

8

pF

B

13. Electrical Characteristics: General (Continued)

All parameters refer to GND and are valid for T

amb

= –40°C to +105°C, V

VS3V_AVCC

= V

VS5V

= 2.7V to 3.3V, and V

VS5V

= 4.5V to 5.5V.

Typical values are given at V

VS3V_AVCC

= V

VS5V

= 3V, T

amb

= 25°C, and f

RF

= 315 MHz unless otherwise specified. Details about current

consumption, timing, and digital pin properties can be found in the specific sections of the “Electrical Characteristics”.

No. Parameters

Test Conditions

Pin

(1)

Symbol

Min.

Typ.

Max.

Unit

Type*

*) Type means: A = 100% tested, B = 100% correlation tested, C = Characterized on samples, D = Design parameter

Note:

1. Pin numbers in parenthesis were measured with RF_IN matched to 50

Ω according to

Figure 2-1 on page 6

with component

values as in

Table 2-2 on page 6

(RF

IN

).