MICRF102 datasheet(2/12 Pages) MICREL

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MICRF102

Micrel

MICRF102

December 2006

Pin Description

Pin Number

Pin Name

Pin Function

Power Control Input. The voltage at this pin should be set between 0.15V to

0.35V for normal operation.

VDD

Positive power supply input for the IC. This pin requires a large capacitor for

ripple decoupling. A 4.7µF is recommended.

VSS

This pin is the ground return for the IC. A power supply bypass capacitor

connected from VDD to VSS should have the shortest possible path.

REFOSC

This is the timing reference frequency which is the transmit frequency di-

vided by 32. Connect a crystal (mode dependent) between this pin and VSS,

or drive the input with an AC-coupled 0.5VPP input clock. See “Reference

Oscillator”

section in this data sheet. The crystal needs to have a 10pF load

capacitance.

STBY

Input for transmitter stand by control pin is pulled to VDD for transmit opera-

tion and VSS for stand-by mode. The device requires 0.0 volts to be placed

in stand by.

ANTN

Negative RF power output to drive the low side of the transmit loop antenna.

The RF output stage is tuned in the data transitions in the ASK pin.

ANTP

Positive RF power output to drive the high side of the transmit loop antenna.

The RF output stage is tuned in the data transitions in the ASK pin.

ASK

Amplitude Shift Key modulation data input pin. For CW operation, connect

this pin to VDD. Several transitions of highs and lows are required to tune the

output RF stages.

Pin Conﬁguration

VDD

VSS

REFOSC

8 ASK

ANTP

ANTN

STBY

8-Pin SOIC (M)

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