Advance Information Wideband FSK Receiver

The MC13055 is intended fo RF data link systems using carrier frequencies up to 40 MHz and FSK (frequency shift keying) data rates up to 2.0 M Baud (1.0 MHz). This design is similar to the MC3356, except that it does not include the oscillator/mixer. The IF bandwidth has been increased and the detector output has been revised to a balanced configuration. The received signal strength metering circuit has been retained, as has the versatile data slicer/comparator.

• Input Sensitivity 20 IlV @ 40 MHz

• Signal Strength Indicator Linear Over 3 Decades

• Available in Surface Mount Package

• Easy Application, Few Peripheral Components

Figure 1. Block Diagram and Application Circuit

L2

Squelch Adjust (meter)

MC13055

WIDEBAND

FSK

RECEIVER MONOLITHIC SILICON INTEGRATED CIRCUIT

".

¹ PLASTIC PACKAGE ^PSUFFIX CASE 648

DSUFFIX PLASTIC PACKAGE

CASE 751B (SO-16)

PIN CONNECTIONS

Comparator Gnd 1 Comparator Vcc 2 IF Ground 3 IFVCC 4 LimHer Input 5 Limiter Bias { : QuadBias B

13 Carrier Detect 2 Meter Drive 11 }

Detector o Out 9 Quad Input

This document contains Information on a new product. Specifications and Information herein are subject to change without notice.

MOTOROLA COMMUNICATIONS DEVICE DATA MC13055

2·135

MAXIMUM RATINGS

Rating Symbol Value Unit

Power Supply Voltage VCC(max) 15 Vdc

Operating Supply Voltage Range V2,V4 3.0 to 12 Vdc

Junction Temperature TJ 150 °C

Operating Ambient Temperature Range TA -4010+85 °C

Storage Temperature Range Tstg -65 to +150 °C

Power Dissipation, Package Rating Po 1.25 W

ELECTRICAL CHARACTERISTICS (VCC = 5.0 Vdc, 10 = 40 MHz, lmod = 1.0 MHz, .1.1 = ±1.0 MHz, TA = 25°C, test circuit 01 Figure 2.) Characteristics

Total Drain Current

Data Comparator Pull-Down Current Meter Drive Slope versus Input Carrier Detect Pull-Down Current Carrier Detect Pull-Up Current Carrier Detect Threshold Voltage DC Output Current

Recovered Signal

Sensitivity lor 20 dBS +

NIN,

BW = 5.0 MHz S + NIN atVln= 50 I1V

Input Impedance @ 40 MHz Quadrature Coil Loading

MC13055 2-136

Measure Min Typ

12+14

-

²⁰

116

-

¹⁰

112 4.5 7.0

113

-"

^1.3

113

-

⁵⁰⁰

V12 700 800

110,111

-

⁴³⁰

V10-V11

-

³⁵⁰

VIN - ²⁰

V10-V11

-

³⁰

Rin Pin 5, Ground

-

^4.2

Cin

-

^4.5

Rin Pln9108

-

^7.6

Cin

-

^5.2

Figure 2. Test Circuit

39pF

100pF

H>--+---+---o Carrier Detect Output H>---f----+---o Meter Drive

Detector K>--_ ...

-+--.()

Output

3.9k 3.9k

Colis - Shielded Coilcrait UNI-10/142

Max Unit 25 "mAO

-

^mA

9.0 IlAIdB

-

^mA

-

^I1A

900 mV

-

^I1A

-

^mVrms

-

^I1Vrms

-

^dB

-

^kll

-

^pF

-

^kQ

-

^pF

L 1 Gray 8·112 Turns, nominal 300 nH L2 Black 10-112 Turns, nominal 380 nH r - - - .,

I I

I I

L _ _ _ _ _ _ _ _ .J

or

TOKO Series E526HNA L 1 Part No.1 00301 L2 Part No.1 00079

MOTOROLA COMMUNICATIONS DEVICE DATA

0

m

-to

:8-~ -20

~

~ -30

Figure 3. Overall Gain, Noise, AM Rejection

SIGNAL INPUT (dBm)

Figure 5. Untuned Input: Limiting Sensitivity versus Frequency I. INPUT FREQUENCY (MHz)

Figure 7. Limiting Sensitivity and Detuning versus Supply Voltage

1 Quadrature

VCC. SUPPLY VOLTAGE (Vdc)

MOTOROLA COMMUNICATIONS DEViCE DATA

Figure 4. Meter Current versus Signal

~ 600 VCC = 5.0 V. 7.0 V

INPUT SIGNAL (dBm)

Figure 6. Untuned Input: Meter Current versus Frequency

;;: 70G InputOd8m -+_+_1--t_lnp~o-ltEP

::L 51 MCl3055 20k I. INPUT FREQUENCY (MHz)

Figure 8. Detector Current and Power Supply Current versus Supply Voltage 0' t200 Vcc. SUPPLY VOLTAGE (Vdc)

MC13055 2-137

Figure 9. Recovered Audio versus Temperature

~ 4.0

~

^2.0

::::> 0 a

Q -2.0

~ o -4.0 w ~ -13.0

::a

-13.0

a:

_o ^-10

:; -12

-"

~

- ^--

I---130 -40 -20 0 20 40 60 80 100 120 140 TA. AMBIENT TEMPERATURE (Oe)

Figure 11. Meter Current versus Temperature 600

lIiDutO~Bm

~

500

>---10 h

~

-

^-20

"""'"

^~

z w a: 400 ::::> a:

u

~ ^{" . ~~O-}

...

~~

V

I--.

"

^~~

a: w 300 ::;; tu

~ ^-40 ...

...

^.~

-

^-li0

- ^{... t ... '}

^~~

~ ₂₀₀ ^~

... ..:, ... _{r ....} ...

l..--~ -130

... ...

1'';:

....

.,:

100

1' .... - ...

-130 -40 -20 0 20 40 60 80 100 120 140 TA. AMBIENTTEMPERATURE (Oe)

Figure 10. Carrier Detect Threshold versus Temperature :[ 1000

9

900

~

~ 800

t;

~

700 a: w ii: 600

~

N :; 500

1' ....

...

I'-...

r--...

... r-....

i"'"'-...

....

-130 -40 -20 0 2 0 4 0 6 0 8 0 TA. AMBIENTTEMPERATURE (Oe)

100 120 140

E ~ -50

> ~

5j

-130 en

m

~ -70 E ::;;

::::i -80

~

~

:Z -90 :>

Figure 12. Input Limiting versus Temperature

.~

; ' ,.~

r--

_{I ' -}

-

,.--130 -40 -20 0 20 40 60 80 100 120 140 TA. AMBIENTTEMPERATURE (Oe)

Figure 13. Input Impedance, Pin 5 1.0

MC13055 2-138

1.0

MOTOROLA COMMUNICATIONS DEVICE DATA

Figure 14. Test Fixture (Component Layout)

1+-1-- - - -

^4"

---1-1

(Circuit Side View)

1+-1---4,,---t-1

MOTOROLA COMMUNICATIONS DEVICE DATA

4"

MC13055 2-139

"'3:

.!on -""

....

Om

3:

~ o

:D

e ~

3:

c z o

5

~

z en o ~

o

m

o :!:i

l>

0

-~

Figure 15. Intemal Schematic

2

~

3t~~

^~

^{oJ_ ('} .~ ~ Y~"

^M ..,... 92 93 ^~

H>

¹³

-<

~ ~

9 3 , . J § . . 91

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fIT 70 ~

s.r T

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1 15

9 . ~ 8

46

~

65

.,...

~ 38

-~~~ttJ;jlt~l'

^{28 .... 25 ,,28}

^{= ~~~~} ~

¹⁰

-1 H ^{~ H} _"1

^{46 27 2B l...!} 1""29

,

^{11 ) 48 ¢}

s'Q1 ... 58 ~57 ... 56 ~55 ... 54 ";2 ~ ^";1

?

~ ~ ~

,..-I

^,..A

;;r ;;r

~r"'50 49

GENERAL DESCRIPTION The MC13055 Is an extended frequency range FM IF,

quadrature detector, signal strength detector and data shapero It is intended primarily for FSK data systems. The design is very similar to MC3356 except that the oscillator/mixer has been removed, and the frequency capability ofthe IF has been raised about 2:1. The detector output configuration has been changed to a balanced, open-collector type to permit symmetrical drive of the data shaper (comparator). Meterdrive and squelch features have been retained.

The limiting IF is a high frequency type, capable of being operated up to 100 MHz. It is expected to be used at 40 MHz in most cases. The quadrature detector is internally coupled to the IF, and a 2.0 pF quadrature capacitor is Internally provided. The 20 dB quieting sensitivity is approximately 20 !lV, tuned input, and the IF can accept Signals up to 220 mVrms without distortion or change of detector quiescent , DC level.

The IF is unusual in that each of the last 5 stages of the 6 stage limiter contains a signal strength sensitive, current sinking device. These are parallel connected and buffered to

MOTOROLA COMMUNICATIONS DEVICE DATA

produce a signal strength meter drive which is fairly linear for IF input signals of 20!lV to 20 mVrms. (See Figure 4.)

A simple squelch arrangement is provided whereby the meter current flowing through the meter load resistance flips a comparator at about 0.8 Vdc above ground. The signal strength at which this occurs can be adjusted by changing the meter load resistor. The comparator (+) input and output are available to permit control of hysteresis. Good positive action can be obtained for IF input signals of above 20 !lVrms. A resistor (R) from Pin 13 to Pin 12 will provide Vce/R of feedback current. This current can be correlated to an amount of signal strength hysteresis by using Figure 4.

The squelch is internally connected to the data shapero Squelch causes the data shaper to produce a high (Vec) output.

The data shaper is a complete "floating" comparator, with diodes across its inputs. The outputs of the quadrature detector can be fed directly to either or preferably both inputs of the comparator to produce a squared output swinging from Vce to ground in inverted or noninverted form.

MC13055 2-141

MOTOROLA

SEMICONDUCTOR·---TECHNICAL DATA

Advance Information

Dans le document Device Data (Page 160-167)