41594B datasheet(329/372 Pages) MICROCHIP

329 / 372 page

 2011-2012 Microchip Technology Inc.

Preliminary

DS41594B-page 329

PIC12LF1840T48A

31.6

Thermal Considerations

Standard Operating Conditions (unless otherwise stated)

Operating temperature -40°C

 TA  +125°C

Param

No.

Sym.

Characteristic

Typ.

Units

Conditions

TH01

JA

Thermal Resistance Junction to Ambient

TBD

C/W

14-pin TSSOP 4x4mm package

TH02

JC

Thermal Resistance Junction to Case

TBD

C/W

14-pin TSSOP 4x4mm package

TH03

TJMAX

Maximum Junction Temperature

150

C

TH04

Power Dissipation

—

PD = PINTERNAL + PI/O

TH05

PINTERNAL Internal Power Dissipation

—

PINTERNAL = IDD x VDD(1)

TH06

PI/O

I/O Power Dissipation

—

PI/O =

 (IOL * VOL) +  (IOH * (VDD - VOH))

TH07

PDER

Derated Power

—

PDER = PDMAX (TJ - TA)/

JA(2)

Legend:

TBD = To Be Determined

Note 1: IDD is current to run the chip alone without driving any load on the output pins.

2: TA = Ambient Temperature.

3: TJ = Junction Temperature.

31.7

RF Transmitter Electrical Specifications

Symbol

Description

Conditions

Min

Typ

Max

Unit

Current Consumption

IDDSL

Supply current in Sleep

mode

—

0.5

µs

IDDT

Supply current in Transmit

mode with appropriate exter-

nal matching

RF Power o/p = +10

dBm

—

16.5

—

RF Power o/p = 0 dBm

—

RF and Baseband Specifications

FDA_D

Frequency deviation, FSK

Number of programma-

ble values

—

——

FDA

Frequency deviation, FSK*

—

100

kHz

BRF

Bit rate, FSK

Permissible Range

0.5

—

100

kbps

BRO

Bit rate, OOK

Permissible Range

0.5

—

kbps

OOK_B

OOK Modulation Depth

——

—

RFOP

RF output power in 50 ohms

High Power Setting

—

dBm

Low Power Setting**

-3

—

dBm

DRFOPV

Variation in RF output power

with supply voltage

2.5V to 3.3V

——

3dB

1.8V to 3.7V

——

7dB

PHN

Transmitter phase noise at

868.3 MHz

Offset from center fre-

quency: 100 kHz

——

-76

dBc/Hz

350 kHz

——

-81

dBc/Hz

550 kHz

——

-91

dBc/Hz

1.15 MHz

——

-101

dBc/Hz

Number of selectable fre-

quencies

——

FXOSC

Crystal Oscillator Frequency

—

MHz

STEP

RF Frequency Step

868 MHz

—

3.174

—

kHz

434 MHz

—

1.587

—

kHz

DFXOSC

Frequency variation of the

Oscillator Circuit

No crystal contribution

——

+/-25

ppm

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