IL145567 Datasheet, PDF (1/10 Pages) Integral Corp. – PCM CODEC - FILTER

PCM CODEC - FILTER
TECHNICAL DATA
IL145567
IL145567N is a one-chip PCM-cofidec which converts speech signal
into digital form and backwards. The IC is design to operate in
synchronous and asynchronous systems and is comprised of:
- reference generator;
- filters on switching capacitors in transmission and receipt channels ;
- two operational amplifiers.
The IC does signal companding under the A-low and full differential
processing of analogue signals for reduction of noises. Typical
dissipated power is 40mW, under reduced power – 1 mW at ±5 V.
ORDERING INFORMATION
IL145567N Plastic DIP
T_A = -40° to 85° C
GS_X ANBL
CLKSEL
VF_XI-
VF_X+
VPO+
VPO−
VPI
VF_RO
MCLK_R/ BCLK_R/
FS_X FS_R MCLK_X BCLK_X PDN
Vcc GND
V_BB
Active RC-
filter of LF
5-poles
active filter
of LF
3-poles filter
of HF
TSx
Control logic
Reference
generator
Active RC-
filter of LF
R-D-to-A
converter
5-poles filter
of LF
COMP
С-D-to-A
converter
4
Multi-
plexer
4
Storage/hol
ding circuit
Shift
register
8
Receivin
g latch
8
Transmitti _Dx
ng register
Receiving DR
register
Note – COMP – comparator
Figure 1 – Block diagram
1