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PDF SSM2163 Data sheet ( Hoja de datos )
| Número de pieza | SSM2163 | |
| Descripción | Digitally Controlled 8 x 2 Audio Mixer | |
| Fabricantes | Analog | |
| Logotipo |  |
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a
Digitally Controlled
8 ؋ 2 Audio Mixer
SSM2163
FEATURES
Each of 8 Inputs Can Be Assigned to Either or Both
Outputs
Voltage Inputs and Outputs – No Need For External
Amplifiers
Each Input Provides 63 dB of Attenuation in 1 dB Steps,
Plus Mute
–82 dBu Signal-to-Noise Ratio (0 dBu = 0.775 V rms)
+10 dBu of Headroom
0.007% THD+N (Unity Gain, @ 1 kHz, 0 dBu)
Power-Up/System Mute Feature
Industry-Standard 3-Wire Serial Interface
Data Out Terminal Permits Daisy Chaining of Multiple
SSM2163s
Single or Dual Supply Operation
28-Pin Plastic DIP and SOIC Package
APPLICATIONS
Multimedia System Mixing
Audio Mixing Consoles
Broadcast Equipment
Intercom/Paging Systems
Musical Instruments
GENERAL DESCRIPTION
The SSM2163 provides eight audio inputs, each of which can
be mixed under digital control to a stereo output. Each input
channel can be attenuated up to 63 dB in 1 dB intervals, plus
fully muted. Additionally, any input can be assigned to either or
both outputs. A standard 3-wire serial interface is employed,
plus a Data Out terminal to facilitate daisy chaining of multiple
mixer ICs. No external components are required for normal
operation.
Excellent audio performance is attained. The SSM2163 has a
signal-to-noise ratio of –82 dBu (0 dBu = 0.775 V rms), with
10 dBu of headroom resulting in total dynamic range of 92 dBu.
Total harmonic distortion plus noise is 0.007% at 1 kHz with all
levels set at unity gain.
SIMPLIFIED BLOCK DIAGRAM
V IN1
DCA
SSM2163
V IN2
V IN3
DCA
DCA
VOLTAGE
REFERENCE
GENERATOR
V IN4
V IN5
DCA
DCA
OUTPUT
SWITCHING
NETWORK
V IN6
V IN7
V IN8
DCA
DCA
DCA
SHIFT
REGISTER
AND
ADDRESS
DECODER
VCC
VEE
ACOM
AGND
VOUTL
VOUTR
SYSTEM MUTE
DATA OUT
CLK
DATA
LD
WRITE
DGND
VDD
VSS
DCA: DIGITALLY CONTROLLED ATTENUATOR
The SSM2163 can be operated from single (+5 V to +14 V) or
dual (± 4 V to ± 7 V) supplies, and is housed in 28-pin plastic
DIP and SOIC packages.
The SSM2163 is an ideal companion product to the Analog
Devices family of stereo codecs in high performance multi-
media systems requiring mixing of multiple signals.
REV. 0
Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
use, nor for any infringements of patents or other rights of third parties
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
© Analog Devices, Inc., 1995
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 617/329-4700
Fax: 617/326-8703
1 page  
ABSOLUTE MAXIMUM RATINGS1
Supply Voltage
Dual Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ± 8 V
Single Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +16 V
Analog Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ± VS
Logic Input Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ± VS
Output Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 mA
Operating Temperature Range . . . . . . . . . . . . –40°C to +85°C
Storage Temperature . . . . . . . . . . . . . . . . . . –65°C to +150°C
Junction Temperature (TJ) . . . . . . . . . . . . . . . . . . . . . +150°C
Lead Temperature (Soldering, 60 sec) . . . . . . . . . . . . . +300°C
THERMAL CHARACTERISTICS
Thermal Resistance2
28-Pin Plastic DIP (SSM2163P)
θJA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48°C/W
θJC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22°C/W
28-Pin SOIC (SSM2163S)
θJA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68°C/W
θJC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20°C/W
TRANSISTOR COUNT
Number of Transistors . . . . . . . . . . . . . . . . . . 1711 MOSFETs
447 BJTs
ESD RATINGS
883 (Human Body) Model . . . . . . . . . . . . . . . . . . . . . . 1000 V
NOTES
1Stresses above those listed under “Absolute Maximum Ratings” may cause
permanent damage to the device. This is a stress rating only and functional
operation of the device at these or any other conditions above those indicated in the
operation section of this specification is not implied. Exposure to absolute maxi-
mum rating conditions for extended periods may affect device reliability.
2θJA is specified for worst-case conditions, i.e., θJA is specified for device in socket
for P-DIP and device soldered in circuit board for SOIC package.
Model
SSM2163P
SSM2163S
ORDERING GUIDE
Temperature
Range
Package
Description
–40°C to +85°C Plastic DIP
–40°C to +85°C SOIC
Package
Option
N-28
R-28
SSM2163
PIN CONFIGURATIONS
Epoxy Plastic DIP (P-Suffix)
and SOIC (S-Suffix)
DGND 1
28 SYSTEM MUTE
VSS 2
27 DATA IN
DATA OUT 3
26 CLK
VDD 4
25 WRITE
VIN1 5 SSM2163 24 LD
NC (SHIELD) 6 TOP VIEW 23 NC (SHIELD)
VIN3 7 (Not to Scale) 22 VIN2
NC (SHIELD) 8
21 NC (SHIELD)
VIN5 9
VCC 10
20 VIN4
19 NC (SHIELD)
VIN7 11
VEE 12
18 VIN6
17 AGND
ACOM 13
VOUTL 14
16 VIN8
15 VOUTR
CAUTION
ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily
accumulate on the human body and test equipment and can discharge without detection.
Although the SSM2163 features proprietary ESD protection circuitry, permanent damage may
occur on devices subjected to high energy electrostatic discharges. Therefore, proper ESD
precautions are recommended to avoid performance degradation or loss of functionality.
WARNING!
ESD SENSITIVE DEVICE
REV. 0
–5–
5 Page 
VDD 4
VCC 10
10µF +
AGND 17
ACOM (NC)
VSS 2
VEE
12
10µF
+
1
DGND
V+
0.1µF
V–
0.1µF
SSM2163 power supply connections
VDD
VCC
4
10
AGND
10µF
17
+
V+
0.1µF
ACOM
VSS
VEE
13
2
12
1
DGND
+
10µF
VREF
OUT
0.1µF
SSM2163
VDD 4
VCC 10
10µF
+
17
AGND
ACOM (NC)
VSS 2
12
VEE
1
DGND
V+
0.1µF
EXTERNAL
REFERENCE
Figure 22a. Dual Supply
Figure 22b. Single Supply
Figure 22c. Single Supply Using External
Reference
stored in the attenuator control registers. To re-enable the
system after a mute, use the address byte to turn on the desired
mixer channel. The selected channel will then operate with the
previously set attenuator value.
Serial Data Input Format
As previously mentioned, data is written to the SSM2163 in two
8-bit bytes. The serial data format is shown in the Address and
Data Decoding Truth Table, Figure 3. The first byte sent contains
the channel address and the Left/Right output mixer control bits.
The address byte is identified by the MSB being high.
The second byte contains the data (i.e., the attenuator value).
The six LSBs of this byte set the attenuation level, from 0 dB to
–63 dB. The MSB of the data byte must be a logic zero.
The standard format for data sent to the SSM2163 is an address
byte followed by a data (attenuator level) byte. In some cases,
however, only one byte needs to be sent. For example,
attenuation levels are not affected by the MUTE input. To turn
a muted channel on, simply send an address byte with the Left
or Right mixer bit set. The addressed channel will immediately
be enabled, using the previously-set attenuation level.
Furthermore, once a channel is addressed the attenuation level
can be varied by sending additional data bytes. For example,
fading a channel can be accomplished by simply incrementing
the data value sent to the SSM2163.
Serial Data Output
The MSB of the shift register is available on the serial DATA
OUTPUT pin. This output can be connected to the input of
another SSM2163 to permit “daisy-chain” operation. See
Figure 26 for a typical application. The DATA OUTPUT pin
swings between the digital power supply rails (i.e., from VDD to
VSS).
Logic Levels
All of the SSM2163 logic inputs have TTL and CMOS
compatible thresholds. However, the allowable voltage range
for these inputs extends from VDD to VSS.
Power Supplies and Decoupling
The SSM2163 operates from either single or dual (split) power
supplies. In either case, proper supply decoupling is important
to maximize audio performance.
To reduce noise, separate pins are provided for the digital and
analog power supply connections. These pins should be
connected together (VDD to VCC and VEE to VSS) as close to the
SSM2163 package as possible (Figures 22a, 22b, 22c, power
supply connections).
Single Supply Operation
The SSM2163 will operate with a single power supply of +5 V
to +14 V. Single supply operation simplifies design and reduces
system cost in multimedia applications, battery powered
systems, and similar designs. The SSM2163 provides about
2 dB of headroom (to 1% THD+N) when operating from a
single +5 V supply.
The key to operating from a single supply is to reference all
analog common connections to a voltage midway between the
supply and ground. To simplify single supply operation, the
SSM2163 provides a buffered pseudo-ground reference (ACOM)
on Pin 13. This reference, shown in Figure 23, provides a low
impedance output at approximately one half of the supply
voltage. Connect Analog Ground (Pin 17) to the ACOM output
(Pin 13) for single supply operation. To minimize noise caused
by modulation of the pseudo-ground, Pin 13 should be bypassed to
power supply ground with 0.1 µF and 10 µF capacitors.
REV. 0
–11–
11 Page | ||
| Páginas | Total 16 Páginas | |
| PDF Descargar | [ Datasheet SSM2163.PDF ] | |
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