ATA5811 datasheet(71/90 Pages) ATMEL

71 / 90 page

ATA5811/ATA5812 [Preliminary]

4689B–RKE–04/04

4.7

Amplitude XTAL after

start-up

m = 5 fF, C0 = 1.8 pF

m =15 Ω

V(XTAL1, XTAL2)

peak-to-peak value

24, 25

PPXTAL

700

mVpp

V(XTAL1)

peak-to-peak value

24, 25

VPPXTAL

350

mVpp

4.8

Maximum series

resistance R

m of XTAL at

start-up

0 ≤2.2 pF, start-up may

take longer under these

conditions

24, 25

XTAL12_START

-1,500

-2,000

Ω

4.9

Maximum series

resistance R

m of XTAL

after start-up

0 ≤2.2 pF

m = 4.0 fF to 7.0 fF

m ≤

120

Ω

24, 25

m_max

120

Ω

4.10

Nominal XTAL load

resonant frequency

FREQ = 3,928

RF = 868.3 MHz

RF = 433.92 MHz

RF = 315 MHz

24, 25

fXTAL

13.41191

13.25311

12.73193

MHz

4.11 External CLK frequency

FREQ = 3,928

CLK

MHz

RF = 868.3 MHz

CLK division ratio = 3

CLK has nominal 50%

duty cycle

fCLK

4.471

MHz

RF = 433.92 MHz

CLK division ratio = 3

CLK has nominal 50%

duty cycle

fCLK

4.41

MHz

RF = 315 MHz

CLK division ratio = 3

CLK has nominal 50%

duty cycle

CLK

4.244

MHz

4.12 DC voltage after start-up

DC(XTAL1, XTAL2)

XTO running

(Idle mode, RX mode

and TX mode)

24, 25

DCXTO

-150

-30

Electrical Characteristics: General (Continued)

All parameters refer to GND and are valid for Tamb = -40°C to +105°C, VVS1 = VVS2 = 2.4 V to 3.6 V (1-battery application),

VVS2 = 4.4 V to 6.6 V (2-battery application) and VVS2 = VVAUX = 4.75 V to 5.25 V (car application). Typical values are given

at VVS1 = VVS2 = 3 V and Tamb = 25°C, fRF = 433.92 MHz (1-battery application) unless otherwise specified. Details about cur-

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

No. Parameters

Test Conditions

(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 brackets mean they were measured with RF_IN matched to 50

Ω according to Figure 7 on page 10 with

component values according to Table 2 on page 10 and RF_OUT matched to 50

Ω according to Figure 16 on page 19 with

component values according to Table 7 on page 19.

CLK

XTO

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