WM2613 Datasheet, PDF (1/11 Pages) Wolfson Microelectronics plc – Byte-wide Parallel Input, 12-bit Voltage Output DAC

WM2613
Byte-wide Parallel Input, 12-bit Voltage Output DAC
Production Data, June 1999, Rev 1.0
FEATURES
• Dual 12-bit voltage output DAC
• Dual supply 2.7V to 5.5V operation
• DNL ±0.4 LSB, INL ±1.5 LSB
• Programmable settling time 1µs or 3µs typical
• 8-bit micro controller compatible interface
• Power down mode (10nA)
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
DESCRIPTION
The WM2613 is a 12-bit voltage output, resistor string, digital-to-
analogue converter. The DAC can be powered down under
software or hardware control, reducing power consumption to
10nA.
The device has an 8-bit microcontroller compatible parallel
interface. The eight data LSBs, the four data MSBs, and the three
control bits are written using three different addresses.
Excellent performance is delivered with a typical DNL of 0.4 LSBs.
The output stage is buffered by a x2 gain near rail-to-rail amplifier,
which features a Class A output stage (slow mode, class AB). The
settling time of the DAC is software programmable to allow the
designer to optimize speed versus power dissipation.
The device is available in a 20-pin TSSOP package. Commercial
temperature (0° to 70°C) and Industrial temperature (-40° to 85°C)
variants are supported.
DEVICE
WM2613CDT
WM2613IDT
TEMP. RANGE
0° to 70°C
-40° to 85°C
PACKAGE
20-pin TSSOP
20-pin TSSOP
BLOCK DIAGRAM
REFIN(12)
SPD (9)
NPD (15)
A[0-1] (8,7)
NCS (18)
NWE (17)
PARALLEL
INTERFACE
AND
CONTROL
LOGIC
D[0-7]
(19,20, 1-6)
POWER-ON
RESET
POWERDOWN/
SPEED
CONTROL
3-BIT
CONTROL
LATCH
4-BIT DAC
MSW
HOLDING
LATCH
8-BIT DAC
LSW
HOLDING
LATCH
DV DD
(10)
AVDD
(11)
REFERENCE
INPUT BUFFER
X1
12-BIT DAC
LATCH
DAC
OUTPUT
BUFFER
X2
(13) OUT
(14)
GND
(16)
NLDAC
WM2613
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
3071
DIGITAL CODE
3583
4095
WOLFSON MICROELECTRONICS LTD
Lutton Court, Bernard Terrace, Edinburgh, EH8 9NX, UK
Tel: [phone]
Fax: [phone]
Email: [e-mail]
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.
Master rev 1.0.doc June 17, 1999 14:12
©1999 Wolfson Microelectronics Ltd.