mt9160bsr1 Zarlink Semiconductor, mt9160bsr1 Datasheet - Page 5

• Manufacturer Part Number: mt9160bsr1
• Description: 5v Multi-featured Phone Codec With Programmable U/a Law Companding
• Manufacturer: Zarlink Semiconductor

Transducer Interfaces
Standard handset transducer interfaces are provided by the MT9160B/61B. These are:
•
•
Serial Port
The handset microphone inputs (transmitter), pins M+/M-. The transmit path gain path may be adjusted to
either 6.0 dB or 15.3 dB. Control of this gain is provided by the TxINC control bit (Gain Control register 1,
address 00h).
The handset speaker outputs (receiver), pins HSPKR+/HSPKR-. This internally compensated fully
differential output driver is capable of driving the load shown in Figure 3. The nominal receive path gain may
be adjusted to either 0 dB, -6 dB or -12 dB. Control of this gain is provided by the RxINC control bit (Gain
Control register 1, address 00h). This gain adjustment is in addition to the programmable gain provided by
the receive filter.
PCM
D
PCM
D
in
out
Encoder
-2.05 dB
Decoder
2.05 dB
Transmit Filter
(1 dB steps)
Transmit Filter
(1 dB steps)
0 to +7 dB
0 to +7 dB
(1 dB steps)
Gain
Filter Gain
0 to -7 dB
Gain
+ Full Scale
(quiet code)
Receive
- Full Scale
Filter/Codec and Transducer Interface
Code
+ Zero
-Zero
INTERNAL TO DEVICE
Figure 3 - Audio Gain Partitioning
-0.37 dB or 8.93 dB
Magnitude
Table 1 - PCM Coding
0000 0000
1000 0000
0111 1111
1111 1111
Zarlink Semiconductor Inc.
Transmit Gain
MT9160B/61B
Sign/
(3.32 dB steps)
Side-tone
+9. 96 dB
-11 dB
-9.96 to
-6 dB
Default Bypass
5
1111 1111
0111 1111
1000 0000
0000 0000
µ-Law
ITU-T (G.711)
Transmit
8.42 dB
Gain
-8.05 dB or
Receiver
-2.05 dB
1010 1010
1101 0101
0101 0101
0010 1010
Driver
A-Law
HSPKR +
HSPKR -
EXTERNAL TO DEVICE
M+
M-
75 W
75 W
Transmitter
Microphone
Data Sheet
Receiver
Handset
(150 W)