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WM2638 Datasheet(PDF) 2 Page - Wolfson Microelectronics plc

Part No. WM2638
Description  Dual 12-Bit Serial Input Voltage Output DAC with Internal reference
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Manufacturer  WOLFSON [Wolfson Microelectronics plc]
Direct Link  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM2638 Datasheet(HTML) 2 Page - Wolfson Microelectronics plc

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WM2638
Production Data
WOLFSON MICROELECTRONICS LTD
PD Rev 1.0 July 99
2
PIN CONFIGURATION
1
2
3
4
NCS
DIN
SCLK
AGND
REF
OUTB
VDD
OUTA
5
6
7
8
PIN DESCRIPTION
PIN NO
NAME
TYPE
DESCRIPTION
1
DIN
Digital input
Serial data input.
2
SCLK
Digital input
Serial clock input.
3
NCS
Digital input
Chip select. This pin is active low.
4
OUTA
Analogue output
DAC A analogue output.
5
AGND
Supply
Analogue ground.
6
REF
Analogue I/O
Reference voltage input/output.
7
OUTB
Analogue output
DAC B analogue output
8
VDD
Supply
Positive power supply.
ABSOLUTE MAXIMUM RATINGS
Absolute Maximum Ratings are stress ratings only. Permanent damage to the device may be caused by continuously operating at or
beyond these limits. Device functional operating limits and guaranteed performance specifications are given under Electrical
Characteristics at the test conditions specified
ESD Sensitive Device. This device is manufactured on a CMOS process. It is therefore generically susceptible to
damage from excessive static voltages. Proper ESD precautions must be taken during handling and storage of this
device.
CONDITION
MIN
MAX
Supply voltage, VDD to AGND
7V
Digital input voltage range to AGND
-0.3V
VDD + 0.3V
Reference input voltage range to AGND
-0.3V
VDD + 0.3V
Output voltage at OUT from external source
VDD + 0.3V
Operating temperature range, TA
WM2638C
WM2638I
0
°C
-40
°C
70
°C
85
°C
Storage temperature
-65
°C
150
°C
Lead temperature 1.6mm (1/16 inch) soldering for 10 seconds
260
°C
RECOMMENDED OPERATING CONDITIONS
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Supply voltage
VDD
2.7
5.5
V
High-level digital input voltage
VIH
2
0.8
V
Low-level digital input voltage
VIL
V
Reference voltage to REF
VREF
VDD - 1.5
V
Load resistance
RL
2
k
Load capacitance
CL
100
Serial clock rate
FSCLK
20
WM2638C
0
70
°C
Operating free-air temperature
TA
WM2638I
-40
85
°C
Note: Reference voltages greater than VDD/2 will cause saturation for large DAC codes.


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