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零件编号 | WM2616 | ||
描述 | 12-bit Serial Input Voltage Output DAC | ||
制造商 | Wolfson Microelectronics plc | ||
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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 Microwire™ compatible 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
Email: [email protected]
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
Production Data Rev 1.0
SOFTWARE CONFIGURATION OPTIONS
The 16 bits of data can be transferred with the sequence shown in Table 2. D11-D0 contains the 12-bit
data word. D14-D13 hold the programmable options.
D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
x SPD PWR x
New DAC value (12 bits)
Table 2 Register Map
PROGRAMMABLE SETTLING TIME
Settling time is a software selectable 12µs or 4µs typical, to within ±0.5LSB of final value. This is
controlled by the value of D14. A ONE defines a settling time of 4µs, a ZERO defines a settling time of
12µs.
PROGRAMMABLE POWER DOWN
The power down function is controlled by D13. A ZERO configures the device as active, or fully
powered up, a ONE configures the device into power down mode. When the power down function is
released the device reverts to the DAC code set prior to power down.
WOLFSON MICROELECTRONICS LTD
Production Data Rev 1.0 June 1999
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页数 | 9 页 | ||
下载 | [ WM2616.PDF 数据手册 ] |
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