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PDF PGA4311U Data sheet ( Hoja de datos )
| Número de pieza | PGA4311U | |
| Descripción | 4 CHANNEL AUDIO VOLUME CONTROL | |
| Fabricantes | Burr-Brown Corporation | |
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PGA4311
SBOS230A – MARCH 2002 – REVISED JUNE 2002
4ĆChannel Audio Volume Control
FEATURES
D DIGITALLY-CONTROLLED ANALOG VOLUME
CONTROL:
Four Independent Audio Channels
Serial Control Interface
Zero Crossing Detection
Mute Function
D WIDE GAIN AND ATTENUATION RANGE:
+31.5dB to –95.5dB with 0.5dB Steps
D LOW NOISE AND DISTORTION:
120dB Dynamic Range
0.0004% THD+N at 1kHz (U–Grade)
0.0002% THD+N at 1kHz (A–Grade)
D NOISE-FREE LEVEL TRANSITIONS
D LOW INTERCHANNEL CROSSTALK:
–130dBFS
D POWER SUPPLIES: ±5V Analog, +5V Digital
D AVAILABLE IN AN SOP-28 PACKAGE
APPLICATIONS
D AUDIO AMPLIFIERS
D MIXING CONSOLES
D MULTI–TRACK RECORDERS
D BROADCAST STUDIO EQUIPMENT
D MUSICAL INSTRUMENTS
D EFFECTS PROCESSORS
D A/V RECEIVERS
D CAR AUDIO SYSTEMS
DESCRIPTION
The PGA4311 is a high–performance, 4-channel audio
volume control designed for professional and high-end
consumer audio systems. Using high performance
operational amplifier stages internal to the PGA4311
yields low noise and distortion, while providing the
capability to drive 600Ω loads directly without buffering.
The 3-wire serial control interface allows for connection
to a wide variety of host controllers, in addition to
support for daisy-chaining of multiple PGA4311
devices.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments
semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date. Products
conform to specifications per the terms of Texas Instruments standard warranty.
Production processing does not necessarily include testing of all parameters.
1
www.ti.com
Copyright 2002, Texas Instruments Incorporated
1 page  
www.ti.com
PGA4311
SBOS230A – MARCH 2002 – REVISED JUNE 2002
TYPICAL CHARACTERISTICS
At TA = +25°C, VA+ = +5V, VA– = –5V, VD+ = +5V, RL = 100kΩ, CL = 20pF, BW measure = 10Hz to 20kHz, unless otherwise noted.
(NOTE: All plots taken with PGA4311 A–Grade.)
5
5 Page 
www.ti.com
MUTE FUNCTION
Muting can be achieved by either hardware or software
control. Hardware muting is accomplished via the
MUTE input, and software muting by loading all zeroes
into the volume control register.
MUTE disconnects the internal buffer amplifiers from
the output pins and terminates the outputs with 10kΩ
resistors to ground. The mute is activated with a zero
crossing detection (independent of the zero cross en-
able status) or an 16ms time-out to eliminate any audi-
ble “clicks” or “pops”. MUTE also initiates an internal
offset calibration.
A software mute is implemented by loading all zeroes
into the volume control register. The internal amplifier
is set to unity gain with the amplifier input connected to
AGND.
PGA4311
SBOS230A – MARCH 2002 – REVISED JUNE 2002
APPLICATIONS INFORMATION
This section includes additional information that is per-
tinent to designing the PGA4311 into an end applica-
tion.
RECOMMENDED CONNECTION DIAGRAM
Figure 5 depicts the recommended connections for the
PGA4311. Power-supply bypass capacitors should be
placed as close to the PGA4311 package as physically
possible.
PRINTED CIRCUIT BOARD (PCB) LAYOUT GUIDE-
LINES
It is recommended that the ground planes for the digital
and analog sections of the PCB be separate from one
another. The planes should be connected at a single
point. See Figure 6 for the recommended PCB floor
plan for the PGA4311.
Figure 5. Recommended Connection Diagram.
11
11 Page | ||
| Páginas | Total 15 Páginas | |
| PDF Descargar | [ Datasheet PGA4311U.PDF ] | |
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