Motorola MC33110P, MC33110D Datasheet

Device

Operating

Temperature Range

Package



SEMICONDUCTOR

TECHNICAL DATA

LOW VOLTAGE

COMPANDER

ORDERING INFORMATION

MC33110D MC33110P

TA = –40 to 85°C

SO–14

Plastic DIP

P SUFFIX

PLASTIC PACKAGE

CASE 646

14

1

PIN CONNECTIONS

Order this document by MC33110/D

D SUFFIX

PLASTIC PACKAGE

CASE 751A

(SO–14)

14

1

V

CC

NC

V

ref

(Top View)

NC

Exp Filter

Exp Output

Exp Input

V

B

Gnd

Comp Filter Comp Output Comp Input Inv Input Comp Feedback

1 2 3 4

14 13 12

11 5 6 7

10

9 8

1

MOTOROLA RF/IF DEVICE DATA

  

The MC33110 contains two variable gain circuits configured for compressing and expanding the dynamic range of an audio signal. One circuit is configured as an expander, while the other circuit can be configured as a compressor or expander. Each circuit has a full wave rectifier to provide average value information to a variable gain cell located in either the input stage or the feedback path. An internal, temperature stable bandgap reference provides the necessary precision voltages and currents required.

The MC33110 will operate from a supply voltage of 2.1 to 7.0 V, over a temperature range of –40 to 85°C. The device is designed to accommodate an 80 dB dynamic range from –60 dB to 20 dB, referenced to 100 mVrms.

Applications include cordless telephone, CB, walkie–talkie, most voice RF links, and any application where the signal–to–noise ratio can be improved by reducing the transmitted dynamic range. Other applications include speakerphone and voice activated intercom, dictating machine, standard telephone, etc.

The MC33110 is packaged in a 14 pin DIP for through–the–hole applications and an SO–14 surface mount.

• Operating Supply Voltage: 2.1 to 7.0 V

• No Precision External Components Required

• 80 dB Dynamic Range Compressed to 40 dB, Re–expandable to 80 dB

• Unity Gain Level: 100 mVrms

• Adjustable Response Time

• Ambient Operating Temperature: –40 to 85°C

• Temperature Compensated Reference

• Applications Include Cordless Phone, CB Radio, Speakerphone, etc.

Simplified Block Diagram

+

–

+

–

2.2 µF

14

3

5

4

6 7

Gnd

10

µ

F

V

B

V

CC

Exp.

Output

Exp

Input

4.7 k 10 k

Rectifier

∆

Gain

10 k

V

B

Bias

& Reference Generator

V

B

∆

Gain

Rectifier

4.7 k 10 k

12

8

11

9

10

Comp Input

1.0

µ

F

20 k

Comp Output

2.0

µ

F

2.2

µ

F

10 k

 Motorola, Inc. 1998 Rev 1

MC33110

2

MOTOROLA RF/IF DEVICE DATA

PIN DESCRIPTION

Name Pin Description

V

ref

1 Normally this pin is not used and is left open. It can be used to make limited adjustments to

the 0 dB level. Any noise or leakage at this pin will affect the 0 dB level and gain tracking.

NC 2, 13 No connection. These pins are not internally connected.

Expander Filter 3 Connect to an external capacitor to filter the full wave rectifier’s output. This capacitor

affects attack and decay times, as well as low frequency accuracy.

Expander Output 4 Output of the expander amplifier.

Expander Input 5 The input impedance is nominally 3.2 kΩ. Nominal signal range is 3.16 mVrms to

316 mVrms. Must be capacitor coupled to the signal source.

V

B

6 An internal reference voltage, nominally VCC/2. This is an ac ground and must be well

filtered to obtain high power supply rejection and low crosstalk.

Ground 7 Connect to a clean power supply ground.

Compressor Feedback 8 Input to the compressor variable gain stage and rectifier. Normally the signal is supplied by

the compressor’s output (Pin 11). Input impedance is nominally 3.2 kΩ.

Inverting Input 9 Inverting input to the compressor amplifier. Normally, this is connected to the compressor’s

output through a filtered dc feedback path.

Compressor Input 10 The input impedance is nominally 10 kΩ. Nominal signal range is 100 µVrms to 1.0 Vrms.

Must be capacitor coupled to the signal source.

Compressor Output 11 Output of the compressor amplifier.

Compressor Filter 12 Connect to an external capacitor to filter the full wave rectifier’s output. This capacitor

affects attack & decay times, and low frequency accuracy.

V

CC

14 Power supply pin. Connect to a power supply providing between 2.1 V and 7.0 V . Nominal

current consumption is 3.5 mA.

1.0 V

100 mV

100

µ

V

1.0 mV

10 mV

316 mV

31.6 mV 10 mV

3.16 mV

+

–

+

–

Rectifier

∆

Gain

I

ref

V

B

R6

R5

V

out

R4

V

in

– 60 dB

– 50 dB

– 40 dB

– 30 dB

– 20 dB

– 10 dB

0 dB

10 dB

20 dB

V

in

R2

R1

∆

Gain

Rectifier

I

ref

R

S

V

B

V

out

Transfer FunctionsCompressor Expander

Compression Expansion

(Voltages are rms)

V

out

+

R5 x R6 x I

refxVin

7.2 x R4

Ǹ

+

0.3162 x V

in

Ǹ

V

out

+

7.2 x R3 x V

in

2

R1xR2xI

ref

+

10 x V

in

2

MC33110

3

MOTOROLA RF/IF DEVICE DATA

MAXIMUM RATINGS

Rating

Symbol

Value

Unit

VCC Supply Voltage

V

CC

12, –0.5

Vdc

High Input Voltage (Pin 5 & 10)

V

IH

VCC + 0.5

Vdc

Low Input Voltage

V

IL

–0.5

Vdc

Output Source Current (Pin 4 & 11)

I

O+

Self–Limiting

Output Sink Current

I

O–

20

mA

Junction Temperature

T

J

–65, 150

°C

NOTES: 1. Devices should not be operated at these values. The “Recommended Operating

Conditions” table provides conditions for actual device operation.

2.ESD data available upon request.

RECOMMENDED OPERATING CONDITIONS

Characteristic Symbol Min Typ Max Unit

VCC Supply Voltage V

CC

2.1 – 7.0 Vdc

Input Voltage Range

Compressor, 2.1 V < VCC < 7.0 V Expander, VCC = 2.1 V Expander, 3.0 V < VCC < 7.0 V

V

IR

0 0 0

– – –

1.0

0.25

0.316

Vrms

Input Frequency F

in

100 – 20 k Hz

Output Load

Compressor (Pin 11, VO = 100 mV) Expander (Pin 4, VO = 100 mV)

R

L

300 150

– –

∞ ∞

Ω

Ambient Temperature T

A

–40 – 85 °C

All limits are not necessarily functional concurrently.

ELECTRICAL CHARACTERISTICS (V

CC

= 5.0 V , f = 1.0 kHz, unless otherwise noted, TA = 25°C, see Figure 1)

Characteristic

Symbol Min Typ Max Unit

POWER SUPPLY

Power Supply Current

VCC = 5.0 V VCC = 2.1 V

I

CC

– –

3.5

3.3

5.5 –

mA

VB Voltage

VCC = 5.0 V

2.1 V < VCC < 7.0 V

V

B

2.4 –

2.5

VCC/2

2.6 –

Vdc

COMPRESSOR

0 dB Gain

Vin = 100 mVrms, Pin 1 = Open

G

(CO)

–1.5 0 1.5

dB

Gain Tracking

@ Vin = 1.0 Vrms, output relative to G

(CO)

@ Vin = 10 mVrms, output relative to G

(CO)

@ Vin = 1.0 mVrms, output relative to G

(CO)

@ Vin = 100 µVrms, output relative to G

(CO)

G

t

9.0 – –

–31

10 –10 –20 –30

11

– –

–29

dB

Total Harmonic Distortion

Vin = 100 mVrms, f = 1.0 kHz

THD

0 0.1 1.5

%

Power Supply Rejection

f = 1.0 kHz, CVB = 10 µF, Vin = – 20 dB

PSRR

– 22 –

dB

Attack Time (Capacitor @ Pin 12 = 2.2 µF) t

a(C)

– 6.0 – ms

Decay Time (Capacitor @ Pin 12 = 2.2 µF) t

d(C)

– 20 – ms

Input Impedance Pin 10

Pin 8

R

in

– –

10

3.2

– –

kΩ

MC33110

4

MOTOROLA RF/IF DEVICE DATA

ELECTRICAL CHARACTERISTICS

(VCC = 5.0 V , f = 1.0 kHz, unless otherwise noted, TA = 25°C, see Figure 1)

Characteristic UnitMaxTypMinSymbol

COMPRESSOR

Peak Output Current Pin 11 I

pk

– 0.3 – mA

Output Offset

Pin 11, with respect to Pin 6, NO SIGNAL Change from NO SIGNAL to 1.0 Vrms at Input

V

OO

–150

–

0

50

150

–

mVdc

EXPANDER

0 dB Gain

(Vin = 100 mVrms, Pin 1 = open)

G

(EO)

–1.5 0 1.5

dB

Gain Tracking

@ Vin = 316 mVrms, output relative to G

(EO)

@ Vin = 31.6 mVrms, output relative to G

(EO)

@ Vin = 10 mVrms, output relative to G

(EO)

@ Vin = 3.16 mVrms, output relative to G

(EO)

G

t

19

– –

–61

+ 20 – 20 – 40 – 60

21

– –

–59

dB

Total Harmonic Distortion

Vin = 100 mVrms, f = 1.0 kHz

THD

0 0.06 1.5

%

Power Supply Rejection (f = 1.0 kHz, CVB = 10 µF) PSRR – 37 – dB Attack Time (Capacitor @ Pin 3 = 2.2 µF) t

a(E)

– 19 – ms

Decay Time (Capacitor @ Pin 3 = 2.2 µF) t

d(E)

– 20 – ms

Input Impedance Pin 5 R

in

– 3.2 – kΩ

Peak Output Current Pin 4 I

pk

– 1.0 – mA

Output Offset

Pin 4, with respect to Pin 6, NO SIGNAL Change from NO SIGNAL to 316 mVrms at Input

V

OO

–150

–

0

25

150

–

mVdc

MISCELLANEOUS

Gain (Pin 10 to Pin 4; Pin 11 capacitor coupled to Pin 5)

VCC = 7.0 V , Vin = 1.0 Vrms VCC = 3.0 V , Vin = 1.0 Vrms VCC = 2.1 V , Vin = 31.6 mVrms

A

V

–2.5 –2.5 –2.5

0 0 0

2.5

dB

Channel Separation

Expander to Compressor, output measured at Pin 11 Vin @ Pin 5 = 316 mVrms, f = 1.0 kHz Vin @ Pin 5 = 316 mVrms, f = 10 kHz

CS

43

–

48

68

– –

dB

Compressor to Expander, output measured at Pin 4 Vin @ Pin 10 = 1.0 Vrms, f = 1.0 kHz Vin @ Pin 10 = 1.0 Vrms, f = 10 kHz

65

–

107

114

– –

Figure 1. Test Circuit

+

–

+

–

2.2 µF

2 µF

5.0 k

3.0

µ

F

Expander

Input

Expander

Output

V

CC

4.7

µ

F 4.7 µF

14 7 6

3

5

4

4.7 k 10 k

Rectifier

∆

Gain

Rectifier

∆

Gain

V

B

V

B

10 k

V

B

Bias & Reference Generator

4.7 k 10 k

10 k

12

8

11

9

10

2.0

µ

F

1.0 µF

3.0

µ

F

5.0 k

2.2

µ

F

Compressor Output

1.0

µ

F

Compressor Input

10 k