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WM5620LCN

更新时间： 2024-11-17 22:13:51
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欧胜 - WOLFSON /
页数 文件大小 规格书
14页 364K
描述
3 & 5V Quad 8-Bit Voltage Output DAC with Serial Interface

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WM5620LCN 数据手册

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WM5620L, WM5620  
Production Data  
Sept. 1996 Rev 2  
3 & 5V Quad 8-Bit Voltage Output DAC  
with Serial Interface  
Description  
Features  
WM5620L and WM5620 are quad 8-bit digital to analogue  
converters (DAC) controlled via a serial interface. Each  
DAC's output voltage range isprogrammable for either x1  
or x 2 its reference input voltage, allowing near rail to rail  
operation for the x 2 output range. Separate high  
impedance buffered voltage reference inputs are provided  
for each DAC. WM5620L operates on a single supply  
voltage of 3 V while WM5620 operates on 5 V.  
•
•
•
•
•
•
•
Four 8-bit voltage output DAC's  
Three wire serial interface  
Programmable x1 or x 2 output range.  
Power-on-reset sets outputs to zero  
Buffered voltage reference inputs  
Simultaneous DAC output update  
14 pin SO or DIP package  
WM5620/L interfaces to all popular microcontrollers and  
microprocessors via a three wire serial interface with CMOS  
compatible, schmitt trigger, digital inputs. An 11 bit  
command word comprises 2 DAC select bits, an output  
range selection bit and 8-bits of data.  
Individual or all DAC outputs are changed using WM5620/  
L's double buffered DAC registers and the separate LOAD  
and LDAC inputs. DAC outputs are updated  
simultaneously by writing a complete set of new values  
and then pulsing the LDAC input.  
The DAC outputs are optimised for single supply  
operation and driving ground referenced loads.  
An internal power-on-reset function sets the DAC's input  
codes to zero at power up.  
Ideal in space critical applications WM5620/L is available  
in small outline and DIP packages for commercial (0oC to  
70oC) and industrial (-40oC to 85oC) temperature ranges.  
Key Specifications  
•
Single supply operation:  
WM5620L : 3 V  
WM5620  
: 5 V  
•
•
•
•
0 to 4 V output (x 2 output range) at 5 V VDD  
0 to 2.5 V output (x 2 output range) at 3 V VDD  
Low power: 5.1 mW at 3 V, 10 mW at 5 V max.  
Guaranteed monotonic output  
Applications  
•
•
•
•
•
•
Programmable d.c. voltage sources  
Digitally controlled attenuator/amplifier  
Signal synthesis  
Mobile communications  
Automatic test equipment  
Process control  
V
x 2  
x 2  
DD  
Block Diagram  
14  
2
Re f A  
12  
11  
10  
DAC  
DAC  
DAC  
DAC  
DACA  
DACB  
DACC  
9
8
8
La tc h  
La tc h  
La tc h  
La tc h  
La tc h  
3
Re f B  
9
La tc h  
4
Re f C  
x 2  
x 2  
9
8
8
La tc h  
5
Re f D  
9
DACD  
9
La tc h  
7
Clk  
6
Da ta  
Lo a d  
Se ria l Inte rfa c e  
Po we r-o n-Re se t  
8
13 LDAC  
1
GND  
Production Data data sheets contain  
final specifications current on publication  
date. Supply of products conforms to  
Wolfson Microelectronics standard terms  
and conditions  
© 1996 Wolfson Microelectronics  
Wolfson Microelectronics  
Lutton Court, Bernard Terrace, Edinburgh EH8 9NX, UK  
Tel: +44 (0) 131 667 9386  
email: admin@wolfson.co.uk  
www: http://www.wolfson.co.uk  
Fax: +44 (0) 131 667 5176  
1234567...14

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