SA5752 Datasheet, PDF (3/13 Pages) NXP Semiconductors – Audio processor - companding, VOX and amplifier section

Philips Semiconductors
Audio processor – companding, VOX and amplifier section
Product specification
SA5752
PIN DESCRIPTIONS
PIN NO.
SYMBOL
1
MIC_IN
2
PREAMP_GRES
3
RECT_GRES
4
NCAN_CAP
5
VOX_OUT
6
VOX_TR
7
GND
8
V_REF
9
V_CC
10
EXP_CAP
11
EXP_OUT
12
EXP_IN
13
HPDN
14
VOX_CTL
15
COMP_CAP2
16
COMP_OUT
17
COMP_CAP1
18
COMP_CAP3
19
COMP_IN
20
NCAN_OUT
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
2
3
4
SA5752
5
6
BANDGAP
VOLTAGE REF
7
8
9
10
Figure 2. Block Diagram
SR00660
1997 Nov 07
3