Page 1
RF COMMUNICATIONS PRODUCTS
SA5752
Audio processor – companding, VOX and
amplifier section
Product Specification
Replaces data of December 6, 1993
IC17 Data Handbook
Philips Semiconductors
1997 Nov 07
Page 2
Philips Semiconductors Product specification
SA5752Audio processor – companding, VOX and amplifier section
DESCRIPTION
The SA5752 is a high performance low power audio signal
processing system especially designed to meet the requirements for
small size and low voltage operation of hand-held equipment. The
SA5752 subsystem includes a low noise microphone preamplifier
with adustable gain, a noise cancellation switching amplifier with
adjustable threshold, a voice operated transmitter (VOX) switch,
VOX control, an audio compressor with buffered input, audio
expandor, and an internal bandgap voltage regulator with power
down capability . When used with Philips Semiconductors’ SA5753,
the complete audio processing function of an AMPS or TACS
cellular telephone is easily implemented. The system also meets
the requirements of the proposed NAMPS or NTACS specifications.
The SA5752 can also be used without the SA5753 in a wide variety
of radio communications applications.
FEA TURES
• Operating voltage range: 2V to 5.5V
• Miniature SSOP
• High performance
• Adjustable VOX and noise cancellation threshold
• Adjustable gain preamplifier
• Audio companding
• ESD protected
• Open collector VOX output
• Logic inputs CMOS compatible
• Power down mode
• Few external components
• Meets AMPS/TACS/NAMPS/NTACS requirements
PIN CONFIGURATION
DK PACKAGE
PREAMP
RECT
NCAN
VOX
EXP
MIC
GRES
VOX
V
IN
GRES
CAP
OUT
TR
GND
REF
V
CC
CAP
1
2
3
4
5
6
SA5752
7
8
9
10
20
NCAN
19
COMP
18
COMP
COMP
17
16
COMP
15
COMP
14
VOX
CTL
13
HPDN
12
EXP
IN
EXP
11
OUT
Figure 1. Pin Configuration
BENEFITS
• Very compact applications
• Long battery life in portable equipment
• Complete cellular audio function with the SA5753
APPLICATIONS
• Cellular radio
• Mobile communications
• High performance cordless telephones
• 2-way radio
OUT
IN
CAP3
CAP1
OUT
CAP2
SR00659
ORDERING INFORMATION
DESCRIPTION TEMPERATURE RANGE ORDER CODE DWG #
20-Pin Plastic Shrink Small Outline Package (SSOP) -40 to +85°C SA5752DK SOT266-1
1997 Nov 07 853-1721 18666
2
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Philips Semiconductors Product specification
SA5752Audio processor – companding, VOX and amplifier section
PIN DESCRIPTIONS
PIN NO. SYMBOL DESCRIPTION
1 MIC
2 PREAMP
3 RECT
4 NCAN
5 VOX
6 VOX
IN
GRES
GRES
CAP
OUT
TR
7 GND Ground
8 V
9 V
10 EXP
11 EXP
12 EXP
REF
CC
CAP
OUT
IN
13 HPDN Hardware power-down
14 VOX
15 COMP
16 COMP
17 COMP
18 COMP
19 COMP
20 NCAN
CTL
CAP2
OUT
CAP1
CAP3
IN
OUT
Microphone input
Preamplifier gain resistor
Rectifier gain resistor
Noise cancellation timing capacitor
Voice operated transmission output
Voice operated transmission threshold resistor
Reference voltage
Positive supply
Expandor timing capacitor
Expandor output
Expandor input
Voice operated transmission control
Compressor capacitor 2 DC block
Compressor output
Compressor timing capacitor 1
Compressor capacitor 3 DC block
Compressor input
Noise cancellation output
BLOCK DIAGRAM
COMPANDOR
NOISE
CANCEL
PREAMP
12 1120 19 18 17 16 15 14 13
BUFFER
EXPANDOR
SA5752
VOX
BANDGAP
VOLTAGE REF
10987654321
SR00660
Figure 2. Block Diagram
1997 Nov 07
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Philips Semiconductors Product specification
SYMBOL
PARAMETER
TEST CONDITIONS
UNIT
SYMBOL
PARAMETER
TEST CONDITIONS
UNIT
SA5752Audio processor – companding, VOX and amplifier section
ABSOLUTE MAXIMUM RATINGS
SYMBOL PARAMETER RATING UNIT
V
CC
V
IN
T
STG
T
A
DC ELECTRICAL CHARACTERISTICS
TA = 25oC, VCC = +3.0V , 0dB = 77.5mV
V
CC
I
CC
Z
L
Z
IN
V
OS
NOTES:
1. Compressor is tested in production with 50kΩ load.
2. Not tested in production.
3. Offset values are identical for both gain states of noise reduction circuit.
4. Operational down to V
Power supply voltage range -0.3 to 6 V
Voltage applied to any other pin -0.3 to (VCC+0.3) V
Storage temperature -65 to +150
Ambient operating temperature -40 to +85
. See test circuit, Figure 6.
RMS
LIMITS
MIN TYP MAX
Supply voltage 2.7
Supply current
No signal
Power down mode
4
3.0 5.5 V
3.1
4.0 mA
125
µA
Load impedance
pins NCAN
COMP
OUT
OUT
1
, EXP
OUT
50 kΩ
10 kΩ
Input impedance
COMP
EXP
IN
IN
2
, MIC
IN
40 50 60 kΩ
2.0 kΩ
Noise cancellation current Pin 6 25 µA
= 2V.
OUT
3
-50 –3.0 50 mV
DC offset NCAN
CC
o
°C
C
AC ELECTRICAL CHARACTERISTICS
TA = 25oC, VCC = +3.0V , 0dB level = 77.5mV
Preamplifier gain range
Preamplifier voltage gain 0dB
Preamplifier voltage gain 40dB
Preamplifier noise density
Switch amplifier gain 9 10 11 dB
Compandor 1kHz, all tests
COMP
COMP
COMP
COMP
COMP
EXP
EXP
EXP
OUT
OUT
OUT
Compressor error at -21dB output level Input level = -42dB –1.0 –0.16 1.0 dB
OUT
Compressor error at -10dB output level Input level = -20dB -1.0 –0.11 1.0 dB
OUT
Compressor error at 0dB output level Input level = 0dB -1.5 +0.1 1.5 dB
OUT
Compressor error at +5dB output level Input level = +10dB -1.0 +0.04 1.0 dB
OUT
Compressor error at +10dB output level Input level = +20dB -1.0 +0.02 1.0 dB
OUT
Expandor error at -42dB output level Input level = -21dB –1.0 –0.12 1.0 dB
Expandor error at -21dB output level Input level = -10.5dB -1.0 +0.1 1.0 dB
Expandor error at -10dB output level Input level = -5dB -1.0 +0.03 1.0 dB
1
RMS
. See test circuit, Figure 6.
Pin 2 open
Pin 2 AC ground
Pin 2 AC grounded
RS = 50kΩ
unweighted 20Hz-20kHz
weighted CCIR
DIN45405 20-20kHz
LIMITS
MIN TYP MAX
0
-1.0
39.0
0
40
40
1.0
41.0
7
8
dB
dB
dB
nV/√Hz
nV/√Hz
1997 Nov 07
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Philips Semiconductors Product specification
SYMBOL
PARAMETER
TEST CONDITIONS
UNIT
SA5752Audio processor – companding, VOX and amplifier section
AC ELECTRICAL CHARACTERISTICS (Contineud)
LIMITS
MIN TYP MAX
EXP
OUT
EXP
OUT
EXP
OUT
EXP
OUT
EXP
OUT
THD Total harmonic distortion
VOX
OUT
VOX
CTL
H
PDN
Expandor error at 0dB output level Input level = 0dB -1.5 –0.2 1.5 dB
Expandor error at +10dB output level Input level = +5dB -1.0 +0.03 1.0 dB
Expandor error at +20dB output level
Expandor V
OS
2
Input level = +10dB -1.0 –0.1 1.0 dB
No signal -50.0 +3.0 50.0 mV
Expandor output DC shift No signal to 0dB -100 +2.0 100 mV
Timing capacitors compandor 2200
Compressor
Expandor
NCAN
OUT
1kHz, 0dB
BW=300-3kHz
1kHz, 0dB
BW=300-3kHz
1kHz. Pin 2 open
output level = 0dB
1kHz, Pin 2 open
output level = +20dB
0.2 1 %
0.1 1 %
0.02 1 %
0.06 1 %
nF
Sink current 0.5 mA
Low level
High level
Open collector IL =
0.5mA
V
CC
V
0.4 V
Input current Low -50 –6.6 0 µA
High -10 –0.02 +10 µA
Input level Low
High
0.7V
0
CC
0.3V
V
CC
CC
V
V
Input current Low -10 –4.1 +10 µA
High -10 –0.2 +10 µA
Input level Low
High
0.7V
0
CC
0.3V
V
CC
CC
V
V
Reference filter capacitor 10 µF
NOTE:
1. Measurements are relative to 0dB output.
2. Measurement is indicative of the output dynamic range capability.
1997 Nov 07
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Page 6
Philips Semiconductors Product specification
SA5752Audio processor – companding, VOX and amplifier section
Companding and Amplifier Section Filter and Control Section
SA5753SA5752
MICROPHONE
GAIN
CONTROL
VOX
OUTPUT
HEADPHONE
SPEAKER
PREAMP
VOX
PA
CANCEL
COMPRESSOR
EXPANDOR
TDA7050T
NOISE
TX
BANDPASS
FILTER
TX
PRE–
EMPHASIS
RX
DE–
EMPHASIS
ATTENUATOR
PA
SUMMING
AMP
TX
LOW
PASS
FILTER
RX
BANDPASS
FILTER
DTMF
GENERATOR
2
C
I
BUS
INTERFACE
VOX CONTROL
AUDIO TO
TRANSMITTER
AUDIO FROM
RECEIVER
DEMODULATOR
CLOCK
1.2MHz
FROM SYSTEM
CONTROLLER I C BUS
2
1997 Nov 07
SR00661
Figure 3. Typical Configuration of Audio Processor (APROC) System Chip Set
6
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Philips Semiconductors Product specification
SA5752Audio processor – companding, VOX and amplifier section
DEMOD DATA
RF BLOCK
VOX
TXEN
DEMOD
MOD
RXCLOCK
RXDATA
DATA BLOCK
DATA
AUDIO BLOCK LOGIC UNIT
MIC
EAR
TXCLOCK
TXDATA
DCLOCK
I2C
SPEAKER
Figure 4. Cellular Radio System
DATA PROCESSOR
SERV
DATA IN
8
CONTROL UNIT
FVC
WSYNC
BUSY
5V
7.5V
5.0/0V
7.5/0V
POWER SUPPLY ENABLE
POWER SUPPLY
SR00653
DEMOD DATA
RF BLOCK
VOX
RSSI
TXEN
DEMOD
DATA
NE5750 LOGIC UNIT
MOD
MIC
EAR
NE5751
I2C
SPEAKER
Figure 5. APROC Application Diagram
8
CONTROL UNIT
5V
7.5V
5.0/0V
7.5/0V
POWER SUPPLY ENABLE
POWER SUPPLYDATA PROCESSOR
SR00654
1997 Nov 07
7
Page 8
Philips Semiconductors Product specification
SA5752Audio processor – companding, VOX and amplifier section
SIDE TONE
PREAMP
NCAN
MIC
IN
220nF
1
NOISE
CANCEL
BUFFER
20
220nF
OUT
RECT
VOX
PREAMP
Avset
GRES
NCAN
CAP
OUT
VOX
TR
GRES
V
CC
GND
39.2k
1µF
V
11.2k
REF
4.7µF
+
+
10µF
+
220nF
130k
COMP
CAP3
CAP1
COMP
VOX
HPDN
IN
OUT
CTL
IN
2
3
VOX
4
5
6
7
8
BANDGAP
VOLTAGE REF
9
COMPRESSOR
EXPANDOR
19
220nF
+
18
220nF
+
17
2.2µF
16
15
COMP
14
13
+
12
2.2µF
COMP
COMP
+
2.2µF
CAP2
EXP
1997 Nov 07
EXP
2.2µF
CAP
EXP
+
10
11
220nF
OUT
SR00662
Figure 6. SA5752 Test and Application Circuit
8
Page 9
Philips Semiconductors Product specification
SA5752Audio processor – companding, VOX and amplifier section
ATTN 6
220nF
IN
RX DEMOD
11
ATTN 7
S10
10
EAR OUT
C15
220nF
SA5753
TDA7050T
GND
15
S6
HPDN
13
IN
1.2MHz
CLOCK
14
DEEMPH
S7
7
DE EMPH OUT
C8
+
IN
EXP
12
S8
2.2 Fµ
DFT
13
RXBPF
S5
S8
S7
8
AUDIO IN
C7
11
MUTE
RX
I2C R8B3
Rx MUTE R0B5
MUTE
S9
9
SPKR OUT
C16
220nF
OUT
EXP
12
RX
IN
OUT
TX
20
ATTN 4
Σ
REF
V
S13
S12
TX
MUTE
S11
TXLPF
TXBPF
S12
1
OUT
20
ATTN 1
2
TXBPF OUT
IN
COMP
220nF
C13
19
S1
TXBPF IN
SIDE TONE
NCAN
C14
DATA
19
ATTN 3
PREEMPH
C12
220nF
MUTE
TX
18
AND
SOFT LIM
S3
3
PRE EMPH IN
CAP3
COMP
220nF
18
I2C R8B1
Tx MUTE R0B4
ATTN 2
S2
DD
V
C10
CAP1
COMP
C11
+
17
SDA
17
4
33nF
OUT
COMP
2.2 Fµ
16
SCL
16
2
I C INTERFACE
AND
REGISTERS
S4
S4
S2
I2C R8B7
5
CTL
VOX
0.1 Fµ
CAP2
2.2 Fµ
+
COMP
C9
15
DTMF
I2C R5B1
6
HPDN
CTL
VOX
14
GEN
1997 Nov 07
NOISE
PREAMP
C1
IN
MIC
BUFFER
CANCEL
1
220nF
2
+
C2
GRES
R1
PREAMP
COMP
VOLTAGE
BANDGAP
8
C5
+
REF
V
10 Fµ
REF
V
4.7 Fµ
Avset
R2
3
GRES
RECT
VOX
220nF
C3
39.2k
+
C4
1 Fµ
4
CAP
NCAN
R3
130k
5
OUT
VOX
6
7
R4
11.2k
TR
GND
VOX
Figure 7. Application Diagram for the Audio Processor
9
EXP
SA5752
9
10
C6
+
CC
CAP
EXP
2.2 Fµ
SR00663
Page 10
Philips Semiconductors Product specification
SA5752Audio processor – companding, VOX and amplifier section
TYPICAL PERFORMANCE CHARACTERISTICS
Supply Current vs Temperature and Supply Voltage
4.00
3.75
3.50
3.25
3.00
2.75
SUPPLY CURRENT (mA)
2.50
2.25
2.00
–50 –40 –30 –20 –10 0 10 20 30 40 50 60 70 80 90 100
TEMPERATURE (°C)
VCC = 5.5V
VCC = 3V
V
CC
V
CC
THD vs Temperature for 3V Supply
1.0
0.9
0.8
0.7
0.6
0.5
THD (%)
0.4
0.3
0.2
0.1
0.0
–50 –40 –30 –20 –10 0 10 20 30 40 50 60 70 80 90 100
EXPANDOR
TEMPERATURE (°C)
COMPRESSOR
= 2.7V
= 2V
0.40
0.35
0.30
0.25
0.20
0.15
0.10
0.05
POWER DOWN SUPPLY CURRENT (mA)
0.00
–50 –40 –30 –20 –10 0 10 20 30 40 50 60 70 80 90 100
1.0
0.8
0.6
0.4
0.2
0.0
–0.2
OUTPUT ERROR (dB)
–0.4
–0.6
–0.8
–1.0
–45
COMPRESSOR
–40 –35 –30
Power Down Supply Current vs
Temperature and Supply Voltage
V
= 5.5V
CC
VCC = 3V
V
= 2.7V
CC
= 2V
V
CC
TEMPERATURE (°C)
Compandor Tracking Error vs Input Level
EXPANDOR
–20
–25
–15 –10
–5
INPUT LEVEL (dB)
0
5101520
25
1.5
1.25
1.00
0.75
0.50
0.25
0.00
–0.25
–0.50
UNITY GAIN ERROR (dB)
–0.75
–1.00
–1.25
–1.50
–50 –40 –30 –20 –10 0 10 20 30 40 50 60 70 80 90 100
Unity Gain Error vs Temperature
COMPRESSOR
EXPANDOR
TEMPERATURE (°C)
Figure 8. Typical Performance Characteristics
1997 Nov 07
1.5
1.25
1.00
0.75
0.50
0.25
0.00
–0.25
–0.50
UNITY GAIN ERROR (dB)
–0.75
–1.00
–1.25
–1.50
1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0
Unity Gain Error vs Supply Voltage
EXPANDOR
COMPRESSOR
SUPPLY VOLTAGE (V)
10
SR00664
Page 11
Philips Semiconductors Product specification
SA5752Audio processor – companding, VOX and amplifier section
TYPICAL PERFORMANCE CHARACTERISTICS (Continued)
Noise Cancellation Switching Amplifier
DYNAMIC RESPSONSE
1
30.0mV/div
50.0ms/div
STOP MARKER:
START MARKER:
∆t:
11.960 ms
0.00000 s
11.960 ms
Voice Activated Transmitter (VOX)
DYNAMIC RESPSONSE
MIC
4
NCAN
1
NCAN
IN
30.0mV/div
OUT
30.0mV/div
OUT
PIN 1
PIN 20
PIN 20
1997 Nov 07
50.0ms/div
STOP MARKER:
START MARKER:
∆t:
120.000 ms
0.00000 s
120.000 ms
Figure 9. Typical Performance Characteristics (cont.)
11
3
VOX
VOX
1.00V/div
OUT
CTL
PIN 5
= LOW
SR00665
Page 12
Philips Semiconductors Product specification
SA5752Audio processor — companding, VOX and amplifier section
SSOP20: plastic shrink small outline package; 20 leads; body width 4.4 mm SOT266-1
1997 Nov 07
12
Page 13
Philips Semiconductors Product specification
SA5752Audio processor — companding, VOX and amplifier section
DEFINITIONS
Data Sheet Identification Product Status Definition
Objective Specification
Preliminary Specification
Product Specification
Formative or in Design
Preproduction Product
Full Production
Philips Semiconductors and Philips Electronics North America Corporation reserve the right to make changes, without notice, in the products,
including circuits, standard cells, and/or software, described or contained herein in order to improve design and/or performance. Philips
Semiconductors assumes no responsibility or liability for the use of any of these products, conveys no license or title under any patent, copyright,
or mask work right to these products, and makes no representations or warranties that these products are free from patent, copyright, or mask
work right infringement, unless otherwise specified. Applications that are described herein for any of these products are for illustrative purposes
only. Philips Semiconductors makes no representation or warranty that such applications will be suitable for the specified use without further testing
or modification.
LIFE SUPPORT APPLICA TIONS
Philips Semiconductors and Philips Electronics North America Corporation Products are not designed for use in life support appliances, devices,
or systems where malfunction of a Philips Semiconductors and Philips Electronics North America Corporation Product can reasonably be expected
to result in a personal injury. Philips Semiconductors and Philips Electronics North America Corporation customers using or selling Philips
Semiconductors and Philips Electronics North America Corporation Products for use in such applications do so at their own risk and agree to fully
indemnify Philips Semiconductors and Philips Electronics North America Corporation for any damages resulting from such improper use or sale.
Philips Semiconductors
811 East Arques Avenue
P.O. Box 3409
Sunnyvale, California 94088–3409
Telephone 800-234-7381
This data sheet contains the design target or goal specifications for product development. Specifications
may change in any manner without notice.
This data sheet contains preliminary data, and supplementary data will be published at a later date. Philips
Semiconductors reserves the right to make changes at any time without notice in order to improve design
and supply the best possible product.
This data sheet contains Final Specifications. Philips Semiconductors reserves the right to make changes
at any time without notice, in order to improve design and supply the best possible product.
Copyright Philips Electronics North America Corporation 1997
All rights reserved. Printed in U.S.A.
1997 Nov 07
13
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