Philips Semiconductors RF Communications Products

Product specification

SA608

Low voltage high performance mixer FM IF system

November 3, 1992

4

AC ELECTRICAL CHARACTERISTICS

= 3.3k; RF level = –45dBm; FM modulation = 1kHz with

±8kHz peak deviation. Audio output with de-emphasis filter and C-message weighted

filter. Test circuit 1. The parameters listed below are tested using automatic test equipment to assure consistent electrical characterristics. The

limits do not represent the ultimate performance limits of the device. Use of an optimized RF layout will improve many of the listed parameters.

LIMITS

SYMBOL

PARAMETER

TEST CONDITIONS

SA608

UNITS

MIN

TYP

MAX

Input signal frequency

150

MHz

Crystal oscillator frequency

150

MHz

Noise figure at 45MHz

6.2

dB

Third–order input intercept point (50

Ω

source)

f1 = 45.0; f2 = 45.06MHz

Input RF Level = –52dBm

–9

dBm

Conversion power gain

Matched 14.5dBV step–up

13.5

17

19.5

dB

50

Ω source

+2.5

dB

RF input resistance

Single–ended input

8

k

Ω

RF input capacitance

3.0

4.0

pF

Mixer output resistance

(Pin 20)

1.25

1.5

k

Ω

IF section

IF amp gain

50

Ω source

44

dB

Limiter gain

50

Ω source

58

dB

Test at Pin 18

–109

dBm

AM rejection

80% AM 1kHz

45

dB

35

60

80

mV

SINAD sensitivity

RF level –110dB

17

dB

THD

Total harmonic distortion

–35

–50

dB

S/N

Signal–to–noise ratio

No modulation for noise

62

dB

IF level = –118dBm

0.3

0.8

V

IF level = –68dBm

.70

1.1

1.80

V

IF level = –23dBm

1.2

1.8

2.5

V

RSSI range

90

dB

RSSI accuracy

+1.5

dB

IF input impedance

1.3

1.5

k

Ω

IF output impedance

0.3

k

Ω

Limiter input impedance

1.30

1.5

k

Ω

Limiter output impedance

(Pin 11)

200

Ω

Limiter output level

(Pin 11)

no load

5k

Ω load

130

115

Frequency check/lim (–) output impedance

(Pin 9)

200

Ω

Frequency check/lim (–) output level

(Pin 9)

no load

5k

Ω load

130

115

RF/IF section (int LO)

Audio level

120

System RSSI output

2.2

V

System SINAD sensitivity

RF level = –117dBm

12

dB

NOTE:

1. The generator source impedance is 50

Ω, but the SA608 input impedance at Pin 18 is 1500Ω. As a result, IF level refers to the actual signal

that enters the SA608 input (Pin 18) which is about 21dB less than the “available power” at the generator.

2. By using 45k

Ω load across the Quad detector coil, you will have Audio output at 115mV with –42dB distortion.