Motorola MC13030DW Datasheet

Device

Operating

Temperature Range

Package



SEMICONDUCTOR

TECHNICAL DATA

DUAL CONVERSION

AM RECEIVER

ORDERING INFORMATION

MC13030DW TA = –40° to +85°C SOIC–28

DW SUFFIX

PLASTIC PACKAGE

CASE 751F

(Top View)

PIN CONNECTIONS

Order this document by MC13030/D

1 2 3 4 5 6 7 8

9 10 11 12 13 14

28 27 26 25 24 23 22 21 20 19 18 17 16 15

Mix1 In Mix1 In RF Gnd FET RF AGC RF AGC2 RF AGC Adj Mix1 RF AGC Adj SD Level IF Gnd SD IF Out S Level Out IF AGC In AF Out V

VCO Out

VCO VCO Ref Mix1 Out Mix1 Out

ref

Mix2 In Mix2 Out Mix2 Out

Xtal Osc E Xtal Osc B

IF In

Det V

ref

Det In

MOTOROLA ANALOG IC DEVICE DATA

 

   

The MC13030 is a dual conversion AM receiver designed for car radio applications. It includes a high dynamic range first mixer, local oscillator, second mixer and second oscillator, and a high gain AGC’d IF and detector. Also included is a signal strength output, two delayed RF AGC outputs for a cascode FET/bipolar RF amplifier and diode attenuator, a buffered IF output stage and a first local oscillator output buf fer for driving a synthesizer . Frequency range of the first mixer and oscillator is 100 kHz to 50 MHz.

Applications include single band and multi–band car radio receivers, and shortwave receivers.

• Operation from 7.5 to 9.0 Vdc

• First Mixer, 3rd Order Intercept = 20 dBm

• Buffered First Oscillator Output

• Second Mixer, 3rd Order Intercept = +5.0 dBm

• No Internal Beats Between 1st and 2nd Oscillator Harmonics

• Signal Strength Output

• Limited 2nd IF Output for Frequency Counter Station Detector

• Adjustable IF Output Station Detector Level

• Adjustable RF AGC Threshold for Both Mixer Inputs

• Two Delayed AGC Outputs for Cascode RF Stage and Diode Attenuator

Representative Block Diagram

This device contains 335 active transistors.

1413121110987654321

1516171819202122232425262728

VCO

5.1 V 6.5 V Mix1

Mix2 XTal

Osc

4.1 V

3.0 mA IF Amp

AGC

6.6 mA

 Motorola, Inc. 1996 Rev 1

MC13030

MOTOROLA ANALOG IC DEVICE DATA

MAXIMUM RATINGS (T

= 25°C, unless otherwise noted.)

Rating

Symbol Value Unit

Power Supply V

10 V

Operating Temperature T

–40 to +85 °C

Storage Temperature T

stg

–65 to +150 °C

Junction Temperature T

150 °C

NOTE: ESD data available upon request.

ELECTRICAL CHARACTERISTICS (T

= 25°C, VCC = 8.0 V, unless otherwise noted.)

Characteristic

Condition/Pin Symbol Min Typ Max Unit

Power Supply Voltage – V

7.5 8.0 9.0 V

Power Supply Current VCC = 8.0 V I

26 32 44 mA Detector Output Level Vin = 1.0 mV , 30% Mod. V13 160 200 240 mVrms Audio S/N Ratio Vin = 1.0 mV , 30% Mod. S/N 48 52 – dB Audio THD Vin = 1.0 mV , 30% Mod.

THD – 0.3

1.0

Vin = 1.0 mV , 80% Mod.

– 0.3

1.0

Vin = 2.0 mV , 80% Mod. – 0.4 1.5

Signal Strength Output Vin = 0 to 2.0 V V11 0 – 5.2 V VCO Buffer Output – V28 178 224 282 mV SD Output Level Vin = 1.0 mV , V11 > V8 V10 2.3 2.7 3.3 Vpp

MIXER1

Input Resistance 1 or 2 to Gnd – – 10 – kΩ Third Order Intercept Point 1 or 2 IP3 – 127 – dBµV Conversion Transconductance 1 or 2 to 24 + 25 g

– 2.2 – mS

Total Collector Current 24 + 25 I

– 4.6 – mA

Input IF Rejection 1 or 2 – – 45 – dB

MIXER2

Input Resistance 22 – – 2.4 – kΩ Third Order Intercept Point 22 IP3 – 112 – dBµV Conversion Transconductance 22 to 20 + 21 g

– 4.6 – mS

Total Collector Current 20 + 21 I

– 3.0 – mA

VCO

Minimum Oscillator Coil Parallel Impedance 27 to 26 R

– 3.0 – kΩ

Buffer Output Level 28 V

– 224 – mVrms

Stray Capacitance 27 C

– 7.0 – pF

IF AMPLIFIER

Input Resistance 17 R

– 2.0 – kΩ

Transconductance 17 to 15 g

– 28 – mS

Maximum Input Level 17 V

– 125 – mVrms

Minimum Detector Coil Parallel Impedance 17 to 15 R

– 15 – kΩ RF Output Level 15, Vin = 1.0 mV – – 2.0 – Vpp Audio Output Impedance 13 R

out

– 120 – Ω Audio Output Level 13 @ 30% Mod. V

out

– 200 – mVrms

MC13030

MOTOROLA ANALOG IC DEVICE DATA

NOTES: 1. The transformers used for at the output of the mixers are wideband 1:4 impedance ratio. The secondary load is the 50 Ω input of the spectrum

analyzer, so the impedance across the collectors of the mixer output is 200 Ω.

2.Since the VCO frequency is not critical for this measurement, a fixed tuned oscillator tuned to 11.7 MHz is used. This gives an input frequency of 1.0 MHz.

3.The detector coil is loaded with a 10 k resistor to reduce the tuned circuit Q and to present a 10 kΩ load to the IF output for determination of IF transconductance.

4.The RF AGC current, S output current and Pin 6 current are measured by connecting a current measuring meter to these pins, so they are effectively shorted to ground.

5.SD adjust is adjusted by connecting a power supply or potentiometer and voltmeter to Pin 8.

Figure 1. Test Circuit

1516171819202122232425262728

VCO

Out

VCO VCO

Ref

Mix1

Out

Mix1

OutRFV

ref

Mix2InMix2

Out

Mix2

Out

Xtal

Osc E

Xtal

Osc B

IF In Det

ref

Det

Mix1InMix1InRF

Gnd

FET RF

AGC

AGC2

AGC

Adj

Mix1

RF AGC

Adj

LevelIFGnd

SD IF

Out

S Level

OutIFAGC InAFOut

Mixer1 Out Mixer2 Out

8.0 V

Mixer2 In

Osc Out

Mixer1 Input

FO = 1.0 MHz

FET RF AGC Voltage

RF AGC Current

Pin 6 Current

SD Adjust

IF Signal Out

S Output Current

Audio Out

IF Output/ Det Input

Input

Adj to 11.7 MHz

2.2

82 pF

680

8.0 V

10 k 10 k

0.1

10.245

0.1

1.0

0.1

0.01

1:4 1:4

10 k 180 pF

0.1

4.7

1413121110987654321

FUNCTIONAL DESCRIPTION

The MC13030 contains all the necessary active circuits for

an AM car radio or shortwave receiver.

The first mixer is a multiplier with emitter resistors in the lower, signal input transistors to give a high dynamic range. It is internally connected to the first oscillator (VCO). The input pins are 1 and 2. The input can be to either Pins 1 or 2, or balanced. These pins are internally biased, so a dc path between them is allowable but not necessary. The mixer outputs are open collectors on Pins 25 and 26. They are normally connected to a tuned transformer.

The first oscillator on Pin 27 is a negative resistance type with automatic level control. The level is low so the signal does not modulate the tuning diode capacitance and cause

distortion. Pin 26 is the reference voltage for the oscillator coil. This reference is also the supply for the mixer circuits. The upper bases of the mixer are 0.7 V below this reference.

The second mixer is similar to the first, but it is single– ended input on Pin 22. Its outputs are open collectors on Pins 20 and 21 which are connected to a tuned transformer. The dynamic range of this mixer is less than the first. It is also connected internally to an oscillator which is normally crystal controlled. The oscillator is a standard Colpitts type with the emitter on Pin 19 and the base on Pin 18.

The IF amplifier input is Pin 17. The AGC operates on the input stage to obtain maximum dynamic range and minimum distortion. The IF output, Pin 15, is a current source.

MC13030

MOTOROLA ANALOG IC DEVICE DATA

Therefore, its gain is determined by the load impedance connected between Pins 15 and 16. Pin 16 is a voltage reference for the output. The output is internally connected to the AM detector, and Pin 13 is the detector output. This detector also provides the AGC signal for the IF amplifier. An RC filter from Pin 13 to 12 removes the audio, leaving a dc level proportional to the carrier level for AGC.

Pin 11 provides a current proportional to signal strength. It is a current source so a resistor must be connected from Pin 11 to ground to select the desired dc voltage range. The current is proportional to the signal level at Pin 17, the IF amplifier input.

A high–gain limiting amplifier is used to derive the station detect (SD) signal output on Pin 10; this output is present only if it is turned on by the voltage on Pin 8. If the voltage on Pin 8 is less than the voltage on Pin 11, the output on Pin 10 is “on”. The station detector IF output on Pin 10 is used with synthesizers which have a frequency counting signal detector.

The RF AGC outputs on Pins 4 and 5 are controlled by the signal levels at Mixer1 or Mixer2. Bypass capacitors are required on Pins 6 and 4 to remove audio signals from the AGC outputs. Pin 4 is designed to control the NPN transistor in series with the RF amplifier FET. The voltage on Pin 4 is

5.1 V with no input signal and decreases with increasing input signal. Pin 5 is designed to control an additional AGC circuit at the antenna input. The voltage on Pin 5 is at 0 V with no input signal and increases with increasing input signals. The voltage on Pin 5 does not increase until the voltage on Pin 4 has decreased to about 1.3 V . In most cases, Pin 5 is used to drive a diode shunt. Maximum output current is about 850 µA.

The RF AGC sensitivity is about 40 mVrms input to Mixer1 or about 2.0 mVrms input to Mixer2 at 1.0 MHz. The AGC sensitivity for both mixers can be decreased by adding a resistor from Pin 6 to ground. There is also an additional amplifier between Mixer1 and its AGC rectifier. The gain of this amplifier and AGC sensitivity for Mixer1 can be increased by adding a resistor from Pin 7 to ground. Therefore, the desired AGC sensitivity for both mixers can be achieved by changing the resistors on Pins 6 and 7.

1 2 3 4 5 6 7 8

9 10 11 12 13 14

28 27 26 25 24 23 22 21 20 19 18 17 16 15

Mix1 In Mix1 In RF Gnd FET RF AGC RF AGC2 RF AGC Adj Mix1 RF AGC Adj SD Level IF Gnd SD IF Out S Level Out IF AGC In AF Out V

VCO Out

VCO VCO Ref Mix1 Out Mix1 Out

ref

Mix2 In Mix2 Out Mix2 Out

Xtal Osc E Xtal Osc B

IF In

Det V

ref

Det In

Figure 2. Pin Connections and DC Voltages

5.1 V

7.8 V

6.5 V

3.7 V

7.9 V

4.4 V

5.0 V

4.8 V

4.1 V

3.3 V

3.3 V 0 V

5.1 to 0 V

0 to 850

0 to 2.8 V

200 mV

43 mV

0 to 4.8 V

0 V

6.5 V

0 to 4.8 V

3.6 to 4.5 V

8.0 V

S Out versus IF Input:

The S output current at Pin 11 is provided by two collectors, one a PNP source and the other a sink to ground. The desired S output voltage can be selected using the curve of Figure 3 and calculating the value of the required resistor.

Figure 3. S Output Current versus IF Input Level

IF INPUT LEVEL (dBµV)

30 40 50 100

PIN 11 CURRENT ( A)

60 70 80 90

RF FET AGC versus Mixer1 and Mixer2 Input Level:

Figures 4 and 5 are generated with no external resistance on Pins 4 or 6, so they represent the minimum RF AGC sensitivity of Mixer1 and Mixer2.

Figure 4. RF AGC Voltage versus Mixer1 Input

85 90 95 100 105

1.0

2.0

3.0

4.0

5.0

MIXER1 INPUT LEVEL (dB

PIN 4 VOLTAGE (V)

Figure 5. RF AGC Voltage versus Mixer2 Input

MIXER2 INPUT LEVEL (dBµV)

65 70 75 80

1.0

2.0

3.0

4.0

5.0

PIN 4 VOLTAGE (V)

MC13030

MOTOROLA ANALOG IC DEVICE DATA

Pin 6 Current versus Mixer1 and Mixer2 Input Level:

The internal resistance from Pin 6 to ground is 39 k. The RF AGC voltage on Pin 4 is 2.0 V when the voltage on Pin 6 is 1.2 V. Therefore, the desired AGC thresholds for either mixer can be set with these curves. The design steps are described in the design notes.

Figure 6. Pin 6 Current versus Mixer1 Input Level

MIXER1 INPUT LEVEL (dBµV)

90 100 110 120

100

150

200

250

PIN 6 CURRENT ( A)

Figure 7. Pin 6 Current versus Mixer2 Input Level

MIXER2 INPUT LEVEL (dBµV)

80 90 120

100

150

200

100 110

250

Mixer1 AGC Gain Increase versus R7:

Adding a resistor from Pin 7 to ground increases the AGC sensitivity of Mixer1. The range of increase in dB can be found from this curve. This is useful after setting up the AGC threshold of Mixer2.

Figure 8. Mixer1 AGC Gain Increase versus R7

100 10 k

5.0

6.0

7.0

8.0

INCREASE IN MIXER1 AGC SENSITIVITY (dB)

1.0 k

1.0

2.0

3.0

4.0

Pin 5 Current versus Pin 4 Voltage:

All the curves give Pin 4 AGC voltage versus some other input level. This curve can be used to determine the auxiliary AGC current from Pin 5 at a given Pin 4 voltage.

Figure 9. Pin 5 Current versus Pin 4 Voltage

PIN 5 CURRENT (mA)

0 0.4 0.8 1.2

1.0

2.0

3.0

4.0

5.0

PIN 4 VOLTAGE

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