April 2007

Rev 4

1/14

14

SMA661AS

Fully integrated GPS LNA IC

Features

Applications

Description

The SMA661AS is the first low-noise amplifier

with integrated matching networks and embedded

power-down function. The chip, which requires

only one external input capacitor, drastically

reduces the application bill of materials and the

PCB area, resulting in an ideal solution for

compact and cost-effective GPS LNA.

The SMA661AS, using the ST's leading-edge

70GHz SiGe BiCMOS technology, achieves

excellent RF performance at the GPS frequency of

1.575GHz, in terms of power gain, noise Figure

and linearity with a current consumption of 8.5mA.

The device is unconditionally stable and ESD

protected. All these features are steady over the

It's housed in ultra-miniature SOT666 plastic

package.

SOT666

(1.65 x 1.2 x 0.57 mm)

Table 1.

Device summary

Part Number

Marking

Package

Packing

SMA661ASTR

661

SOT666

Tape and reel

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