SA5752 Datasheet, PDF (2/13 Pages) NXP Semiconductors – Audio processor - companding, VOX and amplifier section

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
MIC_IN ¹
PREAMP_GRES ²
RECT_GRES ³
NCAN_CAP 4
VOX_OUT ⁵
VOX_TR ⁶
GND ⁷
V_REF 8
V_CC ⁹
EXP_CAP ¹⁰
SA5752
20 _NCANOUT
19 COMP_IN
18 COMP_CAP3
17 COMP_CAP1
16 COMP_OUT
15 COMP_CAP2
14 VOX_CTL
13 HPDN
12 EXP_IN
11 EXP_OUT
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