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Electrical characteristics – Rainbow Electronics ATA5757 User Manual

Page 15

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15

ATA5756/ATA5757 [Preliminary]

4702D–RKE–02/04

Electrical Characteristics

V

S

= 2.0 V to 3.6 V, T

amb

= -40°C to 125°C unless otherwise specified.

Typical values are given at V

S

= 3.0 V and T

amb

= 25°C. All parameters are referred to GND (Pin 9).

C

M

=

4.37

fF,

C

0

=

1.3

pF,

C

LNOM

=

18

pF,

C

4

=

10

pF,

C

5

=

15

pF and

R

S

60

Parameters

Test Conditions

Symbol

Min.

Typ.

Max.

Unit

Supply current,
power-down mode

V

ENABLE

< 0.25 V or ENABLE is open,

V

ASK

< 0.25 V, V

FSK

< 0.25 V

T

amb

= 25

°

C

T

amb

= -40

°

C to +85

°

C

T

amb

= -40

°

C to +125

°

C

I

S_Off

1

100
350

7,000

nA
nA
nA

Supply current, idle mode

V

ENABLE

< 0.25 V, V

S

3.2 V

ASK,FSK can be Low or High

I

S_IDLE

100

µA

Supply current, power-up, PA off,
FSK switch High Z

V

S

3.2 V, V

FSK

> 1.7 V,

V

ASK

< 0.25 V ENABLE is open

I

S

3.6

4.6

mA

Supply current, power-up, PA on,
FSK switch High Z

V

S

3.2 V, C

CLK

10 pF

V

FSK

> 1.7 V, V

ASK

> 1.7 V

ENABLE is open

ATA5756
ATA5757

I

S_Transmit1

8.1
8.5

9.8

10.5

mA
mA

Supply current, power-up, PA on,
FSK Low Z

V

S

3.2 V, C

CLK

10 pF

V

FSK

< 0.25 V, V

ASK

> 1.7 V

ENABLE is open

ATA5756
ATA5757

I

S_Transmit2

8.4
8.8

10.2
11.0

mA
mA

Output power

V

S

= 3.0 V, T

amb

= 25

°

C,

f = 315 MHz for

ATA5756

,

Z

Load, opt

= (380 + j340)

f = 433.92 MHz for

ATA5757

,

Z

Load, opt

= (280 + j310)

P

Out

4

6

8

dBm

Output power variation for the full
temperature and supply voltage
range

T

amb

= -40°C to +125

°

C,

V

S

= 2.0 V to 3.2 V

P

Out

1

8

dBm

Spurious emission

f

CLK

= f

XT0

/8

Load capacitance at pin CLK

20 pF

f

0

± f

CLK

f

0

± f

XT0

other spurious are lower

Spour

-42
-60

dBc

Harmonics

With 50

matching network according

to Figure 9
2nd
3rd

-16
-15

dBc
dBc

Oscillator frequency XTO
(= phase comparator frequency)

f

XTO

= f

0

/24

ATA5756

f

XTO

= f

0

/32

ATA5757

f

XTAL

= resonant frequency of the

XTAL, C

M

=

4.37 fF, load capacitance

selected accordingly
T

amb

= -40°C to +85°C

T

amb

= -40°C to +125°C

f

XTO

-14.0
-17.5

f

XTAL

f

XTAL

+14.0
+17.5

ppm
ppm