LND-TRM33 Просмотр технического описания (PDF) - Linear Dimensions Semiconductor

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LND-TRM33

LOW POWER 300 TO 500 MHz ASK TRANSMITTER

Linear Dimensions Semiconductor 

LND TRM33

LOW POWER 300 TO 500 MHz ASK TRANSMITTER

Electrical

characteristics

(continued)

Matching network

and antenna

options

Table 4: AC Characteristics at 3.0V VCC and 23ºC ambient temperature,

fc = 433.92 MHz, unless otherwise stated

all parameters 100 % production tested under these conditions unless otherwise stated

Parameter

Conditions

Symbol Min

Typ

Maximum Carrier Frequency

fcmax 440

Minimum Carrier Frequency

fcmin

Maximum Data Rate

received BER<1% with receiver Rmfsk

200

pre-detection bandwidth

matched to data rate

Extinction Ratio

R=1.5 kbit/s

M

50

Reference Frequency

Output Power

2nd Harmonic

3rd Harmonic

Reference Spurious

guaranteed by design,

external crystal

with R1=3.9 kOhms

at fc + (fref to 3fref)

fref

4.5

Po

0.5

P2

-34

P3

-35

Pref

-45

Phase Noise

VCO gain

guaranteed by design,

PN

-75

at 10 kHz offset

guaranteed by design

KVCO

125

Phase detector gain

guaranteed by design

KPD

16

50 Ohms

Max

Unit

MHz

290

MHz

kbits/s

dB

7.0

MHz

dBm

-29

dBc

-28

dBc

-40

dBc

dBc/Hz

MHz/V

µA/rad

VCC

1+1:1

SBY

DATA

1 OP1

2 VEE1

3 PS

R1

4 SBY

5 DATA

6 VEE2

7 N/C

8 RO1

OP2 16

VEE 15

14

13

BYPS 12

VCC 11

VSUB 10

RO2 9

C8

C7

R2

C6

VCC

C5

C1

X1

C2

Figure 2: Application Diagram

Figure 2 shows a typical application diagram.

In order to minimise second harmonic distortion, a differential output configuration is recommended.

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