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SL6654

LOWER POWER IF/AF CIRCUIT (WITH RSSI) FOR FM CELLULAR RADIO

Zarlink Semiconductor Inc 

SL6654

ABSOLUTE MAXIMUM RATINGS

Supply voltage

Storage temperature

Operating temperature

Mixer input

8V

-55°C to +150°C

-55°C to +125°C

1V rms

ELECTRICAL CHARACTERISTICS

Test conditions (unless otherwise stated):

V

CC

=

2.5V

to

7.5V,

T

amb

=

-30°C

to

+85°C,

IF

=

455kHz,

RF

=

50MHz,

Quad

Coil

Working

Q

=

30

Characteristics

Value

Units

Conditions

Min.

Typ.

Max.

Overall

Supply current

Sensitivity

AM rejection

Vbias

Co-channel rejection

1.5

20

mA

5

10

µV 20dB SINAD

3

µV 12dB SINAD

40

dB RF input <500µV

1.0

1.2

1.4

V

Tamb = 25°C

7

dB See Note 2

Mixer

RF input impedance

OSC input impedance

OSC input bias

Mixer gain

3rd order input intercept

OSC input level

180

OSC frequency

100

1

kohm

2

kohm

5

µA At V

bias

15

dB Rload = 1.5k

-10

dBm

300

mV

MHz

Oscillator

Current sink

H

fe

fT

IF Amplifier

Gain

Frequency

Diff. input impedance

40

70

µA Tamb = 25°C

30

40 ... 70µA

500

MHz 40 ... 70µA

90

455

1500

20

dB

kHz

kohm

Detector

Audio output level

Ultimate S/N ratio

THD

Output impedance

Inter-output isolation

75

125

mV

60

dB

5mV into pin 14

0.5

5

%

40

kohm

65

dB 1kHz

RSSI

Output

(T

amb

=

+25°C)

Output current

Output current

50

Current change

0.9

Linear dynamic range

70

20

µA No input pin 14

80

µA Pin 14 = 2.5mV

1.22

1.5

µA/dB See Note 1

dB See Note 1

NOTES

1. The RSSI output is 100% dynamically tested at 5V and +20° C over a 70dB range. First the input to pin 14 is set to

2.5mV and the RSSI current recorded Then for each step of 10dB from -40 to +30dB the current is measured again. The

current change in each step must meet the specified figure for current change. The RSSI output is guaranteed monotonic

and free from discontinuities over this range.

2. Co-channel rejection is measured by applying a 3kHz deviation, 1 kHz modulated signal at an input level to give a 20dB

SINAD ratio. Then a 3kHz deviation, 400Hz modulated signal on the same frequency is also applied and its level increased

to degrade the SINAD to 14dB.

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