MC13109A

5

MOTOROLA RF/IF DEVICE DATA

ELECTRICAL CHARACTERISTICS (continued)

FM Receiver

The FM receivers can be used with either a quad coil or a

ceramic resonator. The FM receiver and 1st LO have been

designed to work for all country channels, including 25

channel U.S., without the need for any external switching

circuitry (see Figure 25.)

(Test Conditions: VCC = 2.6 V, TA = 25°C, fO = 46.61 MHz, fDEV = ± 3.0 kHz, fmod = 1.0 kHz.)

Characteristic

Condition

Input

Pin

Measure

Pin

Symbol

Min

Typ

Max

Unit

Sensitivity (Input for

12 dB SINAD)

Matched Impedance

Differential Input

Mix1

In1/2

Det Out

VSIN

–

0.7

–

µVrms

1st Mixer Voltage

Conversion Gain

Vin = 1.0 mVrms, with

CF1 as Load

Mix1

In1/2

Mix1 Out

MXgain1

–

10

–

dB

2nd Mixer Voltage

Conversion Gain

Vin = 3.0 mVrms, with

CF2 as Load

Mix2 In

Mix2 Out

MXgain2

–

20

–

dB

1st Mixer Input

Impedance

–

–

Mix1 In1

Mix1 In2

RP1

CP1

–

0.88

2.5

–

k

Ω

pF

2nd Mixer Input

Impedance

–

–

Mix2 In

RP2

CP2

–

3.0

2.7

–

k

Ω

pF

1st Mixer Output

Impedance

–

–

Mix1 Out

RP1 Out

CP1 Out

–

390

1.8

–

Ω

pF

2nd Mixer Output

Impedance

–

–

Mix2 Out

RP2 Out

CP2 Out

–

1.5

12

–

k

Ω

pF

1st and 2nd Mixer

Voltage Gain Total

Vin = 1.0 mVrms, with

CF1 and CF2 as Load

Mix1

In1/2

Mix2 Out

MXgainT

24

27

–

dB

IF – 3.0 dB Limiting

Sensitivity

fin = 455 kHz

Lim In

Det Out

IF Sens

–

55

100

µVrms

Total Harmonic Distortion

(CCITT Filter)

With RC = 8.2 kΩ/

0.01

µF Filter at Det

Out

Mix1

In1/2

Det Out

THD

–

1.0

3.0

%

Recovered Audio

With RC = 8.2 kΩ/

0.01

µF Filter at Det

Out

Mix1

In1/2

Det Out

AFO

80

100

154

mVrms

Demodulator Bandwidth

–

Lim In

Det Out

BW

–

20

–

kHz

Signal to Noise Ratio

Vin = 10 mVrms,

RC = 8.2 kΩ/0.01 µF

Mix1

In1/2

Det Out

SN

–

50

–

dB

AM Rejection Ratio

30% AM, Vin =

10 mVrms,

RC = 8.2 kΩ/0.001 µF

Mix1

In1/2

Det Out

AMR

30

40

–

dB

First Mixer 3rd Order

Intercept (Input

Referred)

Matched Impedance

Input

Mix1

In1/2

Mix1 Out

TOImix1

–

–10

–

dBm

Second Mixer 3rd Order

Intercept (Input

Referred)

Matched Impedance

Input

Mix2 In

Mix2 Out

TOImix2

–

–27

–

dBm

Detector Output

Impedance

–

–

Det Out

ZO

–

870

–

Ω