MRF89XAM9A-I/RM【PDF 27/34 页】IC TXRX MOD 915MHZ ULP SUB-GHZ

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MRF89XAM9A

TABLE 4-6:

TRANSMITTER AC CHARACTERISTICS (1)

Symbol

RFOP

PN

Description

RF Output Power, Programmable

with 8 Steps of typ. 3 dB

Phase Noise

Min

—

—

—

Typ

+12.5

-8.5

-112

Max

—

—

—

Unit

dBm

dBm

dBc/Hz

Condition

Maximum power setting

Minimum power setting

Measured with a 600 kHz

offset at the transmitter output

TXSP

Transmitted Spurious

—

—

-47

dBc

At any offset between 200 kHz

and 600 kHz, unmodulated

carrier, f dev = 50 kHz

Tx2

Second Harmonic

No modulation, see Note (2)

Tx3

Tx4

Third Harmonic

Fourth Harmonic

—

—

-40

dBm

Txn

Harmonics above Tx4

FSKDEV

TSTWF

TSTWS

FSK Deviation

Transmitter Wake-up Time

Transmitter Wake-up Time

±33

—

—

±55

120

600

±200

500

900

kHz

μs

μs

Programmable

From FS to Tx ready

From Stand-by to Tx ready

Note 1:

2:

Guaranteed by design and characterization.

Transmitter in-circuit performance with SAW filter and crystal.

4.1

Timing Specification and Diagram

TABLE 4-7:

SPI TIMING SPECIFICATION (1,2)

Parameter

SPI Configure Clock Frequency

SPI Data Clock Frequency

Data Hold and Setup Time

SDI Setup Time for SPI Configure

SDI Setup Time for SPI Data

CSCON Low to SCK Rising Edge;

Min

—

—

2

250

312

500

Typ

—

—

—

—

—

—

Max

6

1

—

—

—

—

Unit

MHz

MHz

μs

ns

ns

ns

Condition

—

—

—

—

—

—

SCK Falling Edge to CSCON High

CSDATA Low to SCK Rising Edge;

625

—

—

ns

—

SCK Falling Edge to CSDATA High

CSCON Rising to Falling Edge

CSDATA Rising to Falling Edge

500

625

—

—

—

—

ns

ns

—

—

Note 1:

2:

Typical Values: T A = 25°C, V IN = 3.3V, Crystal Frequency = 12.8 MHz, unless otherwise specified.

Negative current is defined as the current sourced by the pin.

? 2011 Microchip Technology Inc.

Preliminary

DS75017A-page 25

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