U4091BM-RFNY19 Atmel, U4091BM-RFNY19 Datasheet - Page 29

• Manufacturer Part Number: U4091BM-RFNY19
• Description: RF Wireless Misc COM.CORDED - FEATURE PHONE CIRCUIT
• Manufacturer: Atmel
• Type: Programmable Telephone Audio Processorr

Specifications of U4091BM-RFNY19

• Operating Frequency: 100 KHz
• Operating Temperature Range: - 55 C to +150 C
• Package / Case: SSO-44
• Mounting Style: SMD/SMT

Figure 15-2. Audio Frequency Signal Management Atmel
4872B–CORD–01/11
Intercom
Answering
Handset
machine
phone
phone
micro-
micro-
Line
AMPB
MIC1
MIC2
MIC3
VL
0dB
0dB
ST
The 3 programmable parameters are
1. LF (gain at low frequency)
2. P (the pole position of the low-pass)
3. SL (sidetone slope; the pole frequency of the high-pass)
30dB --> 12dB
-3dB to -10dB and 7dB (NWT)
f(P)
6dB steps
LF has 15 programming steps of 0.5dB
LF(0) provides –2dB gain, LF(15) provides 5.5dB gain
STO_DIFF(LF) = (–10dB – 2dB + 0.5dB
The P adjustment has 31 steps. P(0) means the lowpass determined by the external
application (RST, CST). The internally processed low-pass frequency is fixed by the
following equation.
The SL has 3 steps. SL(0) is a lower frequency of the high-pass. SL(3) is a higher fre-
quency of the high-pass. SL can be used to influence the suppression at high
frequencies.
balancing
generator
Sidetone
DTMF
=
--------------------------------------------------- -
2
×
7dB --> 0dB and
π
20dB (NWT)
7dB --> -48dB
×
1 dB steps
1dB steps
CST
Filter
1
-->
×
RST
0dB
0dB
Offset
cancel
< -24dBm/
Offset
cancel
-22dBm >
DTMF
×
®
1.122
U4091BM-R
LRX
DTMF
MIC
AMPB
AGCO
P
Switching
matrix
AMREC
RXLS
AGCI
EPO
LTX
×
LF + 9dB)
26dB --> -3dB and
-10dB (DTMF)
9dB --> 2dB
32dB --> -23dB
cancel
0dB
0dB
Offset
-10dB
1dB steps
1.5dB steps
1dB steps
×
Atmel U4091BM-R
LTX
AGC
6dB
8dB
MOD
AMREC
RECO1
RECO2
SAO1
SAO2
VL
Answering
machine
Loud-
speaker
Earpiece
Line
DTMF
< -34dBm/
-32dBm >
29