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PDF WM8816 Data sheet ( Hoja de datos )
| Número de pieza | WM8816 | |
| Descripción | Stereo Digital Volume Control | |
| Fabricantes | Wolfson Microelectronics plc | |
| Logotipo |  |
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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 ±18V.
The WM8816 is available in a 16-pin SOIC package. It is
guaranteed over a temperature range of -40° to 85°C.
WM8816
Stereo Digital Volume Control
Advanced Information, September 2000, Rev 1.1
FEATURES
• 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 ±18V
• Zero Detection for Gain Changes
• Hardware and Software Mute
• Power On/Off Transient Suppression
APPLICATIONS
• Audio Amplifiers
• Consumer Audio / Entertainment Systems
• Mixing Desks
• Audio Recording Equipment
BLOCK DIAGRAM
LIN (4)
LGND (5)
Zero
Crossing
Detector
Peak
Level
Detector
(3) LFO
(2) LMO
-
+
LEFT OUT
CSB (6)
MUTEB (8)
DATA (9)
CCLK (10)
WM8816
Control
DAC
External Opamps
RGND (12)
RIN (13)
Zero
Crossing
Detector
Peak
Level
Detector
(15) RMO
+
-
(14) RFO
RIGHT OUT
(1)
AVDD
(16)
AGND
(7)
DVDD
WOLFSON MICROELECTRONICS LTD
Lutton Court, Bernard Terrace, Edinburgh, EH8 9NX, UK
Tel: +44 (0) 131 667 9386
Fax: +44 (0) 131 667 5176
Email: [email protected]
http://www.wolfson.co.uk
(11)
DGND
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.
2000 Wolfson Microelectronics Ltd.
1 page  
Advanced Information
CONTROL INTERFACE TIMING DIAGRAM
WM8816
CCLK
tHCSH
CSB
DATA (IN)
DATA (OUT)
tWLC
tWHC
tRC
tFC
tSSLCH
tHLCHS
tDSSHCH
tSDCH
tHCHD
A7 A6 A5 A4 A3 A2 A1 A0 D7 D6 D5 D4 D3 D2 D1 D0
tDCLD
tDSZ
D7 D6 D5 D4 D3 D2 D1 D0
ADDRESS BYTE
DATA BYTE
Figure 1 Control Interface Timing Diagram
WOLFSON MICROELECTRONICS LTD
AI Rev 1.1 September 2000
5
5 Page 
Advanced Information
WM8816
DAC
Balanced
Output
4 LIN
5
LGND
WM8816
13 RIN
12
RGND
LFO
3
LMO 2
RFO
14
RMO 15
+18V
-
+
-18V
+18V
-
+
-18V
2K 2K
+18V
-
+
2K
-18V
2K
Figure 6 Configuration for Double Balanced Output (One Channel)
WOLFSON MICROELECTRONICS LTD
AI Rev 1.1 September 2000
11
11 Page | ||
| Páginas | Total 12 Páginas | |
| PDF Descargar | [ Datasheet WM8816.PDF ] | |
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