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WM8816 Datasheet

  • WM8816

  • Stereo Digital Volume Control

  • 12頁

  • WOLFSON

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WM8816
Stereo Digital Volume Control
Advanced Information, September 2000, Rev 1.1
DESCRIPTION
The WM8816 is a highly linear stereo volume control for
audio systems. The design is based on resistor chains with
external op-amps, which provides flexibility for the supply
voltage, signal swing, noise floor and cost optimisation. The
gain of each channel can be independently programmed
from -111.5dB to +15.5dB through a digital serial control
interface.
Audible clicks on gain changes are eliminated by changing
gains only when a zero crossing has been detected in the
signal. The device also features peak level detection, which
can be used for Automatic Gain Control. The WM8816
operates from a single +5V supply and accepts signal input
levels up to 鹵18V.
The WM8816 is available in a 16-pin SOIC package. It is
guaranteed over a temperature range of -40擄 to 85擄C.
FEATURES
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Gain range from -111.5dB to +15.5dB
0.5dB Gain step size
Total Harmonic Distortion 0.001% (100dB) typical
Crosstalk -110dB typical
Input signals up to 鹵18V
Zero Detection for Gain Changes
Hardware and Software Mute
Power On/Off Transient Suppression
APPLICATIONS
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Audio Amplifiers
Consumer Audio / Entertainment Systems
Mixing Desks
Audio Recording Equipment
BLOCK DIAGRAM
(3) LFO
LIN (4)
(2) LMO
LGND (5)
-
LEFT OUT
Zero
Crossing
Detector
Peak
Level
Detector
+
CSB (6)
MUTEB (8)
DATA (9)
CCLK (10)
External Opamps
Control
WM8816
DAC
Zero
Crossing
Detector
Peak
Level
Detector
(15) RMO
+
RIGHT OUT
RGND (12)
-
(14) RFO
RIN (13)
(1)
AVDD
(16)
AGND
(7)
DVDD
(11)
DGND
WOLFSON MICROELECTRONICS LTD
Lutton Court, Bernard Terrace, Edinburgh, EH8 9NX, UK
Tel: +44 (0) 131 667 9386
Fax: +44 (0) 131 667 5176
Email: sales@wolfson.co.uk
http://www.wolfson.co.uk
Advanced information
data sheets contain
preliminary data on new products in the
pre-production phase of development.
Supplementary data will be published at a
later date.
餂?000
Wolfson Microelectronics Ltd
.

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