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WM2616 Schematic ( PDF Datasheet ) - Wolfson Microelectronics plc

Teilenummer WM2616
Beschreibung 12-bit Serial Input Voltage Output DAC
Hersteller Wolfson Microelectronics plc
Logo Wolfson Microelectronics plc Logo 




Gesamt 9 Seiten
WM2616 Datasheet, Funktion
WM2616
12-bit Serial Input Voltage Output DAC
Production Data June 1999, Rev1.0
FEATURES
12-bit voltage output DAC
Single supply from 2.7V to 5.5V
DNL ±0.5 LSB, INL ±1.9 LSB
Very low power consumption (3V supply):
- 900µW, slow mode
- 2.1mW, fast mode
TMS320, (Q)SPI, and Microwirecompatible serial
interface
Programmable settling time of 4µs or 12µs typical
High impedance reference input buffer
APPLICATIONS
Battery powered test instruments
Digital offset and gain adjustment
Battery operated/remote industrial controls
Machine and motion control devices
Wireless telephone and communication systems
Speech synthesis
Arbitrary waveform generation
ORDERING INFORMATION
DEVICE
TEMP. RANGE
PACKAGE
WM2616CD
WM2616ID
0° to 70°C
-40° to 85°C
BLOCK DIAGRAM
8-pin SOIC
8-pin SOIC
REFIN(6)
DIN (1)
SCLK (2)
NCS (3)
FS (4)
16-BIT
SHIFT
REGISTER
AND
CONTROL
LOGIC
data
REFERENCE
INPUT BUFFER
X1
12-BIT
DAC
LATCH
VDD
(8)
DAC
OUTPUT
BUFFER
X2
(7) OUT
POWER-ON
RESET
(5)
AGND
2-BIT
CONTROL
LATCH
POWERDOWN/
SPEED
CONTROL
WM2616
DESCRIPTION
The WM2616 is a 12-bit voltage output, resistor string digital-to-
analogue converter that can be powered down under software
control. Power down reduces current consumption to 10nA.
The device has been designed to interface efficiently to industry
standard microprocessors and DSPs, including the TMS320
family. The WM2616 is programmed with a 16-bit serial word
comprising 4 control bits and 12 data bits.
Excellent performance is delivered with a typical DNL of 0.5LSBs.
The settling time of the DAC is programmable to allow the designer
to optimize speed versus power dissipation. The output stage is
buffered by a x2 gain rail-to-rail amplifier, which features a Class
AB output stage.
The device is available in an 8-pin SOIC package. Commercial
temperature (0° to 70°C) and Industrial temperature (-40° to 85°C)
variants are supported.
TYPICAL PERFORMANCE
1
0.8
0.6
0.4
0.2
0
-0.2
-0.4
-0.6
-0.8
-1
0
AVDD = DVDD = 5V, VREF = 2.048V, Speed = Fast mode, Load = 10k/100pF
512
1024
1536
2048
2559
DIGITAL CODE
3071
3583
4095
WOLFSON MICROELECTRONICS LTD
Lutton Court, Bernard Terrace, Edinburgh, EH8 9NX, UK
Tel: +44 (0) 131 667 9386
Fax: +44 (0) 131 667 5176
http://www.wolfson.co.uk
Production Data Datasheets contain final
specifications current on publication date.
Supply of products conforms to Wolfson
Microelectronics’ Terms and conditions.
2616 master.doc June 17, 1999 14:13
©1999 Wolfson Microelectronics Ltd.






WM2616 Datasheet, Funktion
WM2616
TYPICAL PERFORMANCE GRAPHS
Production Data Rev 1.0
3
AVDD = DVDD = 5V, VREF = 2.048V, Speed = Fast mode, Load = 10k/100pF
2
1
0
-1
-2
-3
0
512
1024
1536
Figure 2 Integral Non-Linearity
2048
DIGITAL CODE
2559
0.4
VDD = 3V, VREF = 1V, Input Code = 0
0.35
0.3
0.25
0.2
0.15
0.1
0.05
0
0 1 2 3 4 5 6 7 8 9 10
ISINK - mA
Slow
Fast
3071
3583
4095
0.4
VDD = 5V, VREF = 2V, Input Code = 0
0.35
0.3
0.25
0.2
0.15
0.1
0.05
0
0 1 2 3 4 5 6 7 8 9 10
ISINK - mA
Slow
Fast
Figure 3 Sink Current VDD = 3V
2.06
VDD = 3V, VREF = 1V, Input Code = 4095
2.055
2.05
2.045
2.04
2.035
2.03
2.025
0 1 2 3 4 5 6 7 8 9 10
ISOURCE - mA
Slow
Fast
Figure 5 Source Current VDD = 3V
Figure 4 Sink Current VDD = 5V
4.1
VDD = 5V, VREF = 2V, Input Code = 4095
4.095
4.09
4.085
4.08
4.075
4.07
4.065
0 1 2 3 4 5 6 7 8 9 10
ISOURCE - mA
Slow
Fast
Figure 6 Source Current VDD = 5V
WOLFSON MICROELECTRONICS LTD
Production Data Rev 1.0 June 1999
6

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