SA5752 PDF даташит
Спецификация SA5752 изготовлена «Philips» и имеет функцию, называемую «Audio processor - companding / VOX and amplifier section». |
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Детали детали
Номер произв | SA5752 |
Описание | Audio processor - companding / VOX and amplifier section |
Производители | Philips |
логотип |
13 Pages
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RF COMMUNICATIONS PRODUCTS
SA5752
Audio processor – companding, VOX and
amplifier section
Product Specification
Replaces data of December 6, 1993
IC17 Data Handbook
1997 Nov 07
Philips Semiconductors
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Philips Semiconductors
Audio processor – companding, VOX and amplifier section
Product specification
SA5752
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.
FEATURES
• 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
ORDERING INFORMATION
DESCRIPTION
20-Pin Plastic Shrink Small Outline Package (SSOP)
PIN CONFIGURATION
DK PACKAGE
MICIN 1
PREAMPGRES 2
RECTGRES 3
NCANCAP 4
VOXOUT
VOXTR
GND
5
6
7
VREF 8
VCC 9
EXPCAP 10
SA5752
20 NCANOUT
19 COMPIN
18 COMPCAP3
17 COMPCAP1
16 COMPOUT
15 COMPCAP2
14 VOXCTL
13 HPDN
12 EXPIN
11 EXPOUT
Figure 1. Pin Configuration
BENEFITS
• Very compact applications
• Long battery life in portable equipment
• Complete cellular audio function with the SA5753
SR00659
APPLICATIONS
• Cellular radio
• Mobile communications
• High performance cordless telephones
• 2-way radio
TEMPERATURE RANGE
-40 to +85°C
ORDER CODE
SA5752DK
DWG #
SOT266-1
1997 Nov 07
2 853-1721 18666
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Philips Semiconductors
Audio processor – companding, VOX and amplifier section
Product specification
SA5752
PIN DESCRIPTIONS
PIN NO.
SYMBOL
1 MICIN
2 PREAMPGRES
3 RECTGRES
4 NCANCAP
5 VOXOUT
6 VOXTR
7 GND
8 VREF
9 VCC
10 EXPCAP
11 EXPOUT
12 EXPIN
13 HPDN
14 VOXCTL
15 COMPCAP2
16 COMPOUT
17 COMPCAP1
18 COMPCAP3
19 COMPIN
20 NCANOUT
DESCRIPTION
Microphone input
Preamplifier gain resistor
Rectifier gain resistor
Noise cancellation timing capacitor
Voice operated transmission output
Voice operated transmission threshold resistor
Ground
Reference voltage
Positive supply
Expandor timing capacitor
Expandor output
Expandor input
Hardware power-down
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
20 19 18 17 16 15 14 13 12 11
BUFFER
COMPANDOR
EXPANDOR
NOISE
CANCEL
PREAMP
VOX
1 23 4
SA5752
56
BANDGAP
VOLTAGE REF
7 8 9 10
Figure 2. Block Diagram
SR00660
1997 Nov 07
3
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