ML33111
Low Voltage Compander
Silicon Monolithic Integrated Circuit
Legacy Device:
Motorola MC33111
The ML33111 contains two variable gain circuits configured for compress-
ing and expanding the dynamic range of an audio signal. One circuit is config-
ured as an expander, and the other is configured as a compressor. 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 tempera-
ture stable bandgap reference provides the necessary precision voltages.
Included in the ML33111 are controls for muting each section independ-
ently, and for pass through of both. Two uncommitted op amps are available
for peripheral functions.
The ML33111 will operate from a supply voltage of 3.0 V to 7.0 V and
,
over a temperature range of TA –40° to +85°C. It is designed to accommodate
a 60 dB dynamic range; from –40 dB to +20 dB referenced to 100 mVrms.
Applications include cordless telephone, CBs, walkie-talkies, and most
voice RF links, and any application where an improvement in the signal to
noise ratio is desired. Other applications include speakerphones and voice
activated intercoms, dictating machines, etc.
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Operating Supply Voltage: 3.0 V to 7.0 V
Output Voltage Swing = 2.8 Vp-p with VCC = 3.0 V
No Precision External Components Required
60 dB Dynamic Range Compressed to 30 dB, Re-expandable to 60 dB
Unity Gain Level set at 100 mVrms
Attack and Decay Times Adjustable
Mute and passthrough Controls
Two Uncommitted Op Amps
Temperature Compensated Reference
Available in Standard DIP and Surface Mount Packages
16
1
P DIP 16 = EP
PLASTIC PACKAGE
CASE 648
16
1
SO 16 = -5P
PLASTIC PACKAGE
CASE 751B
(SO-16)
CROSS REFERENCE/ORDERING INFORMATION
PACKAGE
MOTOROLA
LANSDALE
P DIP 16
MC33111P
ML33111EP
SO 16
MC33111D
ML33111-5P
Note:
Lansdale lead free (Pb) product, as it
becomes available, will be identified by a part
number prefix change from
ML
to
MLE.
TRUTH TABLE
Simplified Block Diagram
20 k
15 k
40 k
Rectifier
10 k
Vb
5
∆
Gain
Rectifier
10
9
Microphone
Vb
7
7.5 k
40 k
Bias &
Reference
Generator
Mute/
Passthrough
Logic
6
16
1
4
12
8
VCC
∆
Gain
Vb
Compressor
2 Output
Expander
15 Output
CM
0
1
X
0
EM
0
X
1
0
PT
0
X
X
1
Function
Normal
Comp. Mute
Expander Mute
Passthrough
11
1.0
µF
Compressor
3
Input
0.5
1.0
µF
V+
Expander
Input
0.5 14
ML33111
Vb
CM
EM
PT
Page 1 of 12
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Issue
ML33111
PIN FUNCTION DESCRIPTION
Name
Ground
Compressor Output
Compressor Input
LANSDALE Semiconductor, Inc
Pin
1
2
3
Description
Connect to a clean power supply ground.
Output of the compressor section.
Compressor input. The input impedance is nominally 10 kΩ. Nominal signal range is
1.0 mVrms to 1.0 Vrms in normal mode, and up to 0.8 Vrms in passthrough mode.
Must be capacitor coupled to the signal source.
A logic high mutes the compressor. A logic low permits normal operation and passthrough.
Connect an external capacitor to filter the full wave rectifier’s output.
This capacitor affects attack and decay times, and low frequency accuracy.
Inverting input (7) and output (6) of an op amp internally referenced to Vb.
A logic high sets the gain of both expander and compressor to
≈
0 dB, independent of
input level.
Inverting input (9) and output (10) of an op amp internally referenced to Vb.
Connect an external capacitor to filter the full wave rectifier’s output.
This capacitor affects attack and decay times, and low frequency accuracy.
A logic high mutes the expander. A logic low permits normal operation and passthrough.
This pin is not internally connected to anything.
Expander input. The input impedance is nominally 10.9 kΩ. Nominal signal range is
10 mVrms to 316 mVrms in normal mode, and up to 1.0 Vrms in passthrough mode.
Must be capacitor coupled to the signal source.
Output of the expander section.
Power supply. Connect to a power supply voltage in the range of 3.0 V to 7.0 V.
Bypass capacitor should be provided at this pin.
Compressor Mute
Compressor Filter
Amplifier #1
Passthrough
Amplifier #2
Expander Filter
Expander Mute
No Connect
Expander Input
4
5
6, 7
8
9, 10
11
12
13
14
Expander Output
VCC
15
16
TRANSFER FUNCTIONS
Compressor
Rectifier
∆
Gain
Vin
10 k
Vb
Vout
Compression
20 dB
10 dB
0 dB
–10 dB
– 20 dB 10 mV
– 30 dB
1.0 mV
100 mV
31.6 mV
10 mV
1.0 V
316 mV
Expansion
Vin
15 k
Expander
Vb
∆
Gain
Rectifier
Vout
40 k
V out
0.3162 x V
in
– 40 dB
(Voltages are rms)
Vout = 10 x Vin2
MAXIMUM RATINGS
Rating
VCC Supply Voltage (Pin 16 – Pin 1)
High Input Voltage (Pins 3, 4, 8, 12, 14)
Low Input Voltage (Pins 3, 4, 8, 12, 14)
Output Source Current (Pins 2, 6, 10, 15)
Output Sink Current (Pins 2, 6, 10, 15)
Storage Temperature
Symbol
VCC
VIH
VIL
IO+
IO–
Tstg
Value
– 0.5, +12
VCC + 0.5
– 0.5
Self-limiting
Self-limiting
– 65, +150
Unit
Vdc
Vdc
Vdc
mA
mA
°C
NOTE:
Devices should not be operated at these limits. The “Recommended Operating Conditions”
provides for actual device operation.
Page 2 of 12
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ML33111
RECOMMENDED OPERATING CONDITIONS
Characteristic
VCC Supply Voltage
Input Signal Voltage Range (3.0 V < VCC < 7.0 V)
Compressor — Normal and Mute Mode
— Passthrough Mode
Expander
— Normal Mode
— Mute Mode
— Passthrough Mode
Frequency Range (± 1.0 dB accuracy)
Logic Input Voltage Range (Pins 4, 8, 12)
Operating Ambient Temperature
NOTE:
All limits are not necessarily functional concurrently.
LANSDALE Semiconductor, Inc
Symbol
VCC
Vin
Min
3.0
0
0
0
0
0
Typ
—
—
—
—
—
—
—
—
—
Max
7.0
1.3
0.8
0.32
1.3
1.0
10
VCC
+ 85
Unit
Vdc
Vrms
Fin
Vin
TA
0.300
0
– 40
kHz
Vdc
°C
ELECTRICAL CHARACTERISTICS
(VCC = 3.6 V, f = 1.0 kHz, TA = + 25°C, unless noted.)
Characteristic
COMPRESSOR
(Pin 4 = Low unless noted)
0 dB Gain (Vin = 100 mVrms)
Gain tracking relative to GOC
Vin = 1.0 Vrms
Vin = 1.0 mVrms
Passthrough Gain (Pin 8 = High, Pin 4 = Low, Vin = 1.0 Vrms)
Muting (∆ Gain) with Pin 4 = High (Vin = 1.0 Vrms)
Max. Output Swing @ Pin 2 (3.0 V < VCC < 7.0 V)
Normal Mode
Passthrough Mode
Peak Output Current (3.0
≤
VCC
≤
7.0 V, Normal or Passthrough Modes,
Vin = Max)
Total Harmonic Distortion (Vin = 100 mVrms)
Power Supply Rejection @ 1.0 KHz
Vin (Pin 3) = 0
Vin (Pin 3) = 10 mVrms
Vin (Pin 3) = 1.0 Vrms
Attack Time (Capacitor @ Pin 5 = 1.0
µF,
per EIA-553)
Decay Time (Capacitor @ Pin 5 = 1.0
µF,
per EIA-553)
Input Impedance at Pin 3
DC Bias Level (Pin 2)
Output DC Shift (Vin Changed from 0 to 100 mVrms)
EXPANDER
(Pin 12 = Low, unless noted)
0 dB Gain (Vin = 100 mVrms)
Gain Tracking Relative to GOE
Vin = 316 mVrms
Vin = 10 mVrms
Passthrough Gain (Pin 8 = High, Pin 12 = Low, Vin = 1.0 Vrms)
Muting (∆ Gain) with Pin 12 = High (Vin = 0.316 Vrms)
Max. Output Swing @ Pin 15 (3.0 V < VCC , 7.0 V)
Normal Mode
Passthrough Mode
Peak Output Current
VCC = 3.0 V, Vout
≤
2.4 Vp-p
VCC = 3.0 V, Vout = 2.7 Vp-p
VCC
≥
3.6 V, Vout
≤
2.8 Vp-p
Total Harmonic Distortion (Vin = 100 mVrms)
GOE
GTE
19
– 41
GPTE
GMTE
Vout
—
—
IPK
—
—
—
THD
—
2.8
2.8
±
3.5
±1.0
±
4.0
0.2
—
—
mA
—
—
—
1.0
%
–1.0
60
20
– 40
0
76
21
– 39
2.0
—
dB
dB
Vp-p
–1.5
0
1.5
dB
dB
GOC
GTC
9.0
– 21
GPTC
GMTC
Vout
—
—
IPK
THD
PSRR
—
—
—
tAT(C)
tD(C)
Rin
VbIAS
—
—
8.0
1.4
– 20
37
64
72
3.0
14
10
Vb
1.6
—
—
—
—
—
14
1.6
2.0
ms
kΩ
Vdc
mVdc
—
—
1.1
2.3
±
4.0
0.2
—
—
—
1.0
mA
%
dB
– 2.0
55
10
– 20
0
67
11
–19
1.0
—
dB
dB
Vp-p
–1.5
0
1.5
dB
dB
Symbol
Min
Typ
Max
Unit
Page 3 of 12
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ML33111
LANSDALE Semiconductor, Inc
ELECTRICAL CHARACTERISTICS
(VCC = 3.6 V, f = 1.0 kHz, TA = + 25°C, unless noted.)
Characteristic
EXPANDER
(Pin 12 = Low, unless noted)
Power Supply Rejection @ 1.0 kHz
Vin (Pin 14) = 0
Vin (Pin 14) = 10 mVrms
Vin (Pin 14) = 316 mVrms
Attack Time (Capacitor @ Pin 11 = 1.0
µF,
per EIA-553)
Decay Time (Capacitor @ Pin 11 = 1.0
µF,
per EIA-553)
Input Impedance at Pin 14
DC Bias Level (Pin 15)
Output DC Shift (Vin changed from 0 to 100 mVrms)
LOGIC INPUTS
(Pins 4, 8, 12)
Switching Threshold (3.0 < VCC < 7.0 V)
Input Current
@ Vin = 0 V
@ Vin = 3.6 V
Timing (Vin @ Pins 3 and 14 = 300 mVrms, See Figures 1, 2)
Comp. Mute (Pin 4) to Comp. Output
Low-to-High
High-to-Low
Exp. Mute (Pin 12) to Exp. Output
Low-to-High
High-to-Low
Passthrough (Pin 8) to Comp. Output
Low-to-High
High-to-Low
Passthrough (Pin 8) to Exp. Output
Low-to-High
High-to-Low
OP AMPS
(Pins 6, 7, 9, 10)
Open Loop Gain
Gain Bandwidth
Input Bias Current @ Pins 7, 9
Max Output Swing @ Pins 6, 10 (3.0 V < VCC < 7.0 V)
Peak Output Current
VCC = 3.0 V, Vout
≤
2.4 Vp-p
VCC = 3.0 V, Vout = 2.6 Vp-p
VCC
≥
3.6 V, Vout
≤
2.8 Vp-p
Total Harmonic Distortion (Vout = 1.0 Vrms, Unity Gain)
MISCELLANEOUS
Power Supply Current
@ VCC = 3.6 V
@ VCC = 7.0 V
Reference Voltage
Channel Separation
Expander to Compressor
(Pin 14 = 316 mVrms @ 1.0 kHz and Pin 3 = 0 mVrms)
(Pin 14 = 100 mVrms (300 Hz < f < 20 kHz),
Pin 3 = 100 mVrms @ 1.2 kHz)
Compressor to Expander
(Pin 3 = 1.0 Vrms @ 1.0 kHz and Pin 14 = 0 mVrms)
(Pin 3 = 100 mVrms (300 Hz < f < 20 kHz),
Pin 14 = 100 mVrms @ 1.2 kHz)
ICC
—
—
Vb
CS
40
—
60
—
70
96
100
97
—
—
—
—
—
1.5
1.7
1.5
2.0
—
—
Vdc
dB
mA
AVOL
BW
IIB
Vout
IPK
—
—
—
THD
—
—
—
—
—
100
300
8.0
2.8
±
3.0
±
2.0
±
3.7
0.02
—
—
—
—
—
—
—
0.2
%
dB
kHz
nA
Vp-p
mA
VST
Rin
—
—
tCMLH
tCMHL
tEMLH
tEMHL
tPCLH
tPCHL
tPELH
tPEHL
—
—
—
—
—
—
—
—
0
55
2.0
3.0
2.0
3.0
2.0
5.0
6.0
7.0
—
—
µs
—
—
—
—
—
—
—
—
—
1.3
—
Vdc
µA
PSRR
—
—
—
tAT(E)
tD(E)
Rin
VbIAS
—
—
8.0
1.4
– 20
74
76
62
3.0
14
10.9
Vb
1.0
—
—
—
—
—
14
1.6
20
ms
kΩ
Vdc
mVdc
dB
Symbol
Min
Typ
Max
Unit
Page 4 of 12
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Issue
ML33111
LANSDALE Semiconductor, Inc
TEMPERATURE PERFORMANCE
(Typical performance based on device characterization, not guaranteed.)
Characteristic
Power Supply Current
@ VCC = 3.6 V
@ VCC = 7.0 V
Reference Voltage (Vb)
0 dB Gain (Vin = 100 mVrms) — Compressor
0 dB Gain (Vin = 100 mVrms) — Expander
Total Harmonic Distortion (Vin = 100 mVrms) — Compressor
Total Harmonic Distortion (Vin = 100 mVrms) — Expander
Gain Tracking Relative to 0 dB Gain — Compressor
Vin = 1.0 Vrms
Vin = 1.0 mVrms
Gain Tracking Relative to 0 dB Gain — Expander
Vin = 316 mVrms
Vin = 10 mVrms
Muting (∆ Gain) with Pin 4 = High (Vin = 1.0 Vrms) — Compressor
Muting (∆ Gain) with Pin 12 = High (Vin = 0.316 Vrms) — Expander
– 40°C
1.2 mA
1.4 mA
1.495 V
0.08 dB
0.04 dB
0.3%
0.3%
10.8 dB
–19.95 dB
18.6 dB
– 40.2 dB
68 dB
76 dB
+25°C
1.5 mA
1.7 mA
1.5 V
0 dB
0 dB
0.2%
0.2%
10 dB
– 20 dB
20 dB
– 40 dB
67 dB
76 dB
+ 85°C
1.6 mA
1.9 mA
1.505 V
– 0.04 dB
– 0.03 dB
0.2%
0.16%
10 dB
– 20.1 dB
19.95 dB
– 39.9 dB
66 dB
75 dB
Figure 1. Mute Timing
Compressor
or Expander
Mute Input
tEMLH
tCMLH
tCMHL
tEMHL
Compressor
or Expander
Output
Figure 2. Passthrough Timing
Passthrough
Input
Compressor
Output
Expander
Output
Page 5 of 12
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Issue
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