ML2721 datasheet(5/27 Pages) MICRO-LINEAR

5 / 27 page

ML2721

January, 2000

PRELIMINARY DATASHEET

PRELIMINARY

PIN DESCRIPTIONS

PIN CONFIGURATION

Power & Ground

VCC2

I (analog)

DC Power Supply Input to the VCO voltage regulator

VCC5

I (analog)

DC power supply Input to Voltage Regulators and unregulated loads:

2.7 to 5.0V. VCC5 is the main (or master) analog VCC pin. There must

be a capacitor to ground from this pin to decouple (bypass) noise and

to stabilize the regulator

GND

I (analog)

DC ground for VCO and LO circuits

RVCC1

O (analog)

DC power supply decoupling point for the PLL dividers, phase detector,

and charge pump. This pin is connected to the output of the regulator

and to the PLL supplies. There must be a capacitor to ground from this

pin to decouple (bypass) noise and to stabilize the regulator

RVCC3

O (analog)

DC power supply decoupling point for the VCO. Connected to the

output of the VCO regulator. There must be a capacitor to ground from

this pin to decouple (bypass) noise and to stabilize the regulator

RVCC4

O (analog)

DC power supply decoupling point for the LO Chain. Connected to the

output of a regulator. There must be a capacitor to ground from this pin

to decouple (bypass) noise and to stabilize the regulator

RVCC6

O (analog)

DC power supply decoupling point for Quadrature Mixer and IF filter

circuits. There must be a capacitor to ground from this pin to decouple

(bypass) noise and to stabilize the regulator

Pin #

Signal Name

I/O

Description

VCC

TRFO

RVCC

RRFI

GND

10111213141516

32 31 30 29 28 27 26 25

XCEN

RXON

PLLEN

DATA

CLK

LD/TPQ

VSS

TOP VIEW

ML2721

32-Pin TQFP (H32-7)

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