TH7108 데이터 시트보기 (PDF) - Melexis Microelectronic Systems

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TH7108

868/915MHz FSK/FM/ASK Transmitter

Melexis Microelectronic Systems  

TH7108

868/915MHz

FSK/FM/ASK Transmitter

4.4 DC Characteristics

all parameters under normal operating conditions, unless otherwise stated;

typical values at TA = 23 °C and VCC = 3 V

Parameter

Symbol

Condition

Min

Typ

Max

Unit

Standby current

Clock only current

Operating current

ISBY ENCK=0, ENTX=0

ICLK ENCK=1, ENTX=0

ICC ENCK=x, ENTX=1,

RPS=56kΩ

0.05

0.1

µA

0.7

0.9

1.6

mA

7

9.5

14

mA

Input current

IIN DATA=x, ENCK=0,

-1

ENTX=0

1

µA

Pull down current

Pull up current

MOS switch On resistance

IPD ENCK=1, ENTX=1

IPS ENCK=1, ENTX=1

RON DATA=0, ENTX=1

3

8

30

µA

14

20

24

µA

10

25

80

Ω

4.5 AC Characteristics

all parameters under normal operating conditions, unless otherwise stated;

typical values at TA = 23 °C and VCC = 3 V;

ENCK = 1, ENTX = 1, RPS = 56 kΩ, fc = 868.3 MHz, test circuit shown in Fig. 2

Parameter

Symbol

Condition

Min

Typ

Output power

Reference spurs

Clock spurs

Harmonic content

Spurious output signal

Phase noise

VCO gain

Charge pump current

Clock voltage swing

Start-up time

Po

Pref

Pclk

Pharm

Poff

PN

KVCO

ICP

VCKOUT

ton

@ fc ± fref

@ fc ± fclk

@ 2fc , 3fc , 4fc

VPS ≤ 0.1V

@ fc ± 200kHz

Cload = 5pF

from ”all OFF” to any

other mode

-2

-44

-44

-40

-60

-82

300

±260

2

1.0

Max

-78

1.2

Unit

dBm

dBm

dBm

dBm

dBm

dBc/Hz

MHz/V

µA

Vpp

ms

4.6 Output Power Selection

typical values at TA = 23 °C and VCC = 3 V:

ENCK = 1, ENTX = 1, fc = 868.3 MHz, test circuit shown in Fig. 2

RPS / kΩ

≥ 68

56

47

VPS/ V

Icc / mA

Po / dBm

Pharm / dBm

≥2

12.5

1

≤-40

1.1

9.5

-2

≤-40

0.9

8.5

-5

≤-40

39

0.7

7.8

-8

≤-45

27

0.5

7.0

-10

≤-45

15

0.3

6.2

-15

≤-50

3901007108

Rev. 008

Page 8 of 14

Data Sheet

May/03

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