Philips Semiconductors

Product specification

SA631

1GHz low voltage LNA and mixer

2

1998 Jan 08

853–2045 18847

DESCRIPTION

The SA631 is a combined low-noise BiCMOS amplifier, and mixer

designed for high-performance low-power communication systems

from 800-1000MHz. The low-noise preamplifier has a 1.7dB noise

figure at 881MHz with 15dB gain and an IP3 intercept of –7dBm at

the input. The gain is stabilized by on-chip compensation to vary

less than

±0.2dB over –40 to +85°C temperature range. The

wide-dynamic-range mixer has a 10dB noise figure and IP3 of

+3.3dBm at the input at 881MHz. The nominal current drawn from a

single 3V supply is 8.3mA. Additionally, the entire circuit can be

powered down to further reduce the supply current to less than

20

µA.

FEATURES

APPLICATIONS

PIN CONFIGURATION

1

2

3

4

5

6

7

8

9

10

11

12

13

14

20

19

18

17

16

15

GND

LNA OUT

VCC

LNA IN

GND

GND

MIXER IN

MIXER OUT

MIXER OUT

GND

GND

GND

GND

GND

GND

GND

LO OUT

PD2

PD1

GND

SR00124

Figure 1. Pin Configuration

ORDERING INFORMATION

DESCRIPTION

TEMPERATURE RANGE

ORDER CODE

DWG #

20-Pin Shrink Small Outline Package (Surface-mount, SSOP)

–40 to +85

SA631DK

SOT266-1

BLOCK DIAGRAM

4

3

2

15

20

19

18

17

16

7

610

9

8

15

14

13

12

11

LO

GND

GND

GND

LNA

IN

GND

MIXER

IN

MIXER

OUT

MIXER

OUT

PD1

PD2

GND

LNA

OUT

GND

OUT

GND

GND

LNA

GND

GND

GND

SR01588

Figure 2. SA631 Block Diagram