ATA2745 データシートの表示（PDF） - Atmel Corporation

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ATA2745

UHF ASK Transmitter

Atmel Corporation 

6. Absolute Maximum Ratings

Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. This is a stress rating

only and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of this

specification is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.

Parameters

Symbol

Min.

Max.

Unit

Supply voltage

Power dissipation

Junction temperature

Storage temperature

Ambient temperature

VS

Ptot

Tj

Tstg

–55

Tamb

–40

6

V

250

mW

150

°C

125

°C

85

°C

Electrostatic sensitive device.

Observe precautions for handling.

7. Thermal Resistance

Parameters

Junction ambient

Symbol

RthJA

Value

180

Unit

K/W

8. Electrical Characteristics

All parameters are refered to GND (pin 5), VS = 3V, Tamb = 25°C, unless otherwise specified

The possible operating ranges refer to different circuit conditions: VS = 2.2V to 4.0V at Tamb = –40°C to +85°C

Parameters

Test Conditions

Symbol

Min.

Typ.

Max.

Supply current (power down)

VASK, VFSK ≤ 0.3V, VS < 3.6V

Supply current (power up, output OFF) VASK = GND, VEN = VS, VS = 3V

Supply current (power up, output ON) VASK = VS, VS = 3V, RPWRSET = 1.2 kΩ

Output power

VS = 3V, Tamb = 25° C, f = 433.92 MHz

RPWRSET = 1.2 kΩ

Output power variation for

f = 315 MHz compared to

f = 433.92 MHz

f = 315 MHz

Pout = PRef + ∆PRef

At Pout = 2.0 mW,

the load impedance must be selected

Maximum peak output

antenna voltage

to meet the Vout maximum

requirement, the supply current is not

dependent on the load impedance

tolerance

ISoff

ISon

IStransmit

PRef

∆PRef

Voutmax

2

10

4.7

6.2

10

12.5

1

3

5

1.5

VS – 0.7V

fo ±(n × fPC) where fPC = 6.78 MHz

Spurious emission

Load capacitance at CLK ≤ 3 pF

f = 230 MHz to 470 MHz

Em

–40

f < 230 MHz, f > 470 MHz

Em

–58

Oscillator frequency XTO

Crystal frequency = 13.56 MHz

fXTO

13.56 –

30 ppm

13.56

13.56 +

30 ppm

Unit

µA

mA

mA

dBm

dB

V(peak)

dBC

dBC

MHz

6 ATA2745

4898B–RKE–08/06

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