WM2638
Production Data
PIN CONFIGURATION
DIN
SCLK
NCS
OUTA
1
2
3
4
8
7
6
5
VDD
OUTB
REF
AGND
PIN DESCRIPTION
PIN NO
1
2
3
4
5
6
7
8
NAME
DIN
SCLK
NCS
OUTA
AGND
REF
OUTB
VDD
TYPE
Digital input
Digital input
Digital input
Analogue output
Supply
Analogue I/O
Analogue output
Supply
Serial data input.
Serial clock input.
Chip select. This pin is active low.
DAC A analogue output.
Analogue ground.
Reference voltage input/output.
DAC B analogue output
Positive power supply.
DESCRIPTION
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
Supply voltage, VDD to AGND
Digital input voltage range to AGND
Reference input voltage range to AGND
Output voltage at OUT from external source
Operating temperature range, T
A
Storage temperature
Lead temperature 1.6mm (1/16 inch) soldering for 10 seconds
WM2638C
WM2638I
0°C
-40°C
-65°C
-0.3V
-0.3V
MIN
MAX
7V
VDD + 0.3V
VDD + 0.3V
VDD + 0.3V
70°C
85°C
150°C
260°C
RECOMMENDED OPERATING CONDITIONS
PARAMETER
Supply voltage
High-level digital input voltage
Low-level digital input voltage
Reference voltage to REF
Load resistance
Load capacitance
Serial clock rate
Operating free-air temperature
SYMBOL
VDD
V
IH
V
IL
V
REF
R
L
C
L
F
SCLK
T
A
WM2638C
WM2638I
Note:
Reference voltages greater than VDD/2 will cause saturation for large DAC codes.
WOLFSON MICROELECTRONICS LTD
PD Rev 1.0 July 99
2
0
-40
2
100
20
70
85
°C
°C
VDD - 1.5
TEST CONDITIONS
MIN
2.7
2
TYP
MAX
5.5
0.8
UNIT
V
V
V
V
kΩ
WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
