|
|
PDF WM5620 Data sheet ( Hoja de datos )
| Número de pieza | WM5620 | |
| Descripción | 3 & 5V Quad 8-Bit Voltage Output DAC with Serial Interface | |
| Fabricantes | Wolfson Microelectronics plc | |
| Logotipo |  |
|
Hay una vista previa y un enlace de descarga de WM5620 (archivo pdf) en la parte inferior de esta página. Total 14 Páginas | ||
|
No Preview Available !
WM5620L, WM5620
Production Data
Sept. 1996 Rev 2
3 & 5V Quad 8-Bit Voltage Output DAC
with Serial Interface
Description
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.
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.
Features
• 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
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
Block Diagram
2
Ref A
Ref B 3
4
Ref C
Ref D 5
Clk 7
Data 6
Load 8
9 Latch
9 Latch
9 Latch
9 Latch
14 VDD
DAC
Latch 8
DAC
Latch 8
DAC
Latch 8
DAC
Latch 8
x2
x2
x2
x2
12
DACA
11
DACB
10
DACC
9
DACD
Serial Interface
13 LDAC
Power-on-Reset
1 GND
Production Data data sheets contain
final specifications current on publication
date. Supply of products conforms to
Wolfson Microelectronics standard terms
and conditions
Wolfson Microelectronics © 1996 Wolfson Microelectronics
Lutton Court, Bernard Terrace, Edinburgh EH8 9NX, UK
Tel: +44 (0) 131 667 9386 Fax: +44 (0) 131 667 5176
email: [email protected]
www: http://www.wolfson.co.uk
1 page  
WM5620L, WM5620
Electrical Characteristics: WM5620 & WM5620L (continued)
11 Reference feedthrough is measured at a DAC out-
put with an input code = 00 Hex with a VREF input = 1
Vdc + 1 VPP at 10kHz
12. Channel to channel isolation is measured at a DAC
output with an input code of one DAC to FF Hex and
the code oa all other DACs to oo Hex with a VREF
input = 1 Vdc + 1 Vpp at 10kHz
13 Setting time is the time for the output signal to remain
within ±0.5 LSB of the final measurement value for a
digital input code change of 00 Hex to FF Hex. For WM
5620: VDD = 5V, VREF = 2V and range = x 2. For
WM5620L: VDD = 3, VREF = 1.25V and range = x 2.
14 Reference bandwidth is the -3dB bandwidth with an
input at VREF = 1.25 Vdc =+ 2 Vpp with a digital input
code of full-scale
Parameter Measurement Information
DACA
DACB
DACC
DACD
10KΩ
CL - 100pF
Slewing Settling Time and Linearity Measurements
Typical Performance Characteristics
Typical DNL, INL and TUE * at VDD = 5 V
D ifferential Nonlinearit y
V DD = 5 V , V ref = 2.5 V , Range x 1, TA= 25OC
0.2
0.1
0
-0.1
-0.2
0 32 64 96 128 160 192 224 256
Input Code
Tot al Unad just ed Error
V DD = 5 V , V ref = 2.5 V , Range = x 1, TA = 25OC
0.5
0.25
0
-0.25
-0.5
0 32 64 96 128 160 192 224 256
* see note 2
Input Code
Inte gral No nline arit y
V DD = 5 V , V ref = 2.5 V , Range = x 1, T A = 25OC
0.2
0.1
0
-0.1
-0.2
0 32 64 96 128 160 192 224 256
Input Code
D iffe re nt ial Nonline arit y
V DD = 5 V , V ref = 2 V , Range = x 2, TA = 25OC
0.2
0.1
0
-0.1
-0.2
0 32 64 96 128 160 192 224 256
Input Code
Wolfson Microelectronics
5
5 Page 
Functional Description (Continued)
Using these inputs individual DACs can be updated using
one 11 bit serial input word and the LOAD pin. Using both
LOAD and LDAC, all or selected DACs can be updated
after an appropriate number of data words have been
inputted. Figures 3 & 4 illustrate operation with the 8 clock
pulses available from some microprocessors. If the data
input is interrupted in this way the clock input must be
held low during the break in clock pulses.
Serial Input Decode
A1 A0 DAC
0 0 DACA
0 1 DACB
1 0 DACC
1 1 DACD
WM5620L, WM5620
The RNG bit controls the DAC output range. When RNG
= 0 the output is between Vref(A,B,C,D) and GND and
when RNG = 1 the range is between 2 x Vref (A,B,C,D)
and GND.
D7 D6
00
00
••
••
01
10
••
••
11
D5 D4 D3
00
0
00
0
••
•
••
•
11
1
00
0
••
•
••
•
11
1
D2
0
0
•
•
1
0
•
•
1
D1 D0
Output Voltage
0 0 GND
0 1 (1/256) x Ref (1 + RNG)
••
•
••
•
1 1 (127/256) x Ref (1 + RNG)
0 0 (128/256) x Ref (1 + RNG)
••
•
••
•
1 1 (255/256) x Ref (1 + RNG)
Wolfson Microelectronics
11
11 Page | ||
| Páginas | Total 14 Páginas | |
| PDF Descargar | [ Datasheet WM5620.PDF ] | |
Hoja de datos destacado
| Número de pieza | Descripción | Fabricantes |
| WM5620 | 3 & 5V Quad 8-Bit Voltage Output DAC with Serial Interface | Wolfson Microelectronics plc |
| WM5621L | Low-power Quadruple 8-Bit DAC | Wolfson Microelectronics plc |
| WM5628 | 3 & 5V Octal 8-Bit Voltage Output DAC with Serial Interface | Wolfson Microelectronics plc |
| Número de pieza | Descripción | Fabricantes |
| SLA6805M | High Voltage 3 phase Motor Driver IC. |
 Sanken |
| SDC1742 | 12- and 14-Bit Hybrid Synchro / Resolver-to-Digital Converters. |
 Analog Devices |
|
DataSheet.es es una pagina web que funciona como un repositorio de manuales o hoja de datos de muchos de los productos más populares, |
| DataSheet.es | 2020 | Privacy Policy | Contacto | Buscar |