WM2637
Production Data
PIN CONFIGURATION
VDD
DIN
SCLK
NCS
1
2
3
4
8
7
6
5
OUT B
REF
AGND
OUT A
PIN DESCRIPTION
PIN NO
NAME
DIN
TYPE
DESCRIPTION
Serial data input.
Serial clock input.
1
2
3
4
5
6
7
8
Digital input
Digital input
Digital input
Analogue output
Supply
SCLK
NCS
Chip select. This pin is active low.
DAC A analogue output.
Analogue ground.
OUTA
AGND
REF
Reference voltage input/output.
DAC B analogue output
Positive power supply.
Analogue I/O
Analogue output
Supply
OUTB
VDD
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
7V
Supply voltage, VDD to AGND
Digital input voltage
-0.3V
-0.3V
VDD + 0.3V
VDD + 0.3V
Reference input voltage
Operating temperature range, TA
WM2637CD
WM2637ID
0°C
-40°C
-65°C
70°C
85°C
Storage temperature
150°C
260°C
Lead temperature 1.6mm (1/16 inch) soldering for 10 seconds
RECOMMENDED OPERATING CONDITIONS
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Supply voltage
VDD
VIH
2.7
2
5.5
V
V
High-level digital input voltage
Low-level digital input voltage
Reference voltage to REF
Load resistance
VDD = 5V
VDD = 5V
VIL
0.8
V
VREF
RL
VDD - 1.5
V
2
kW
Load capacitance
CL
100
20
Serial Clock Rate
FSCLK
TA
Operating free-air temperature
WM2637CD
WM2637ID
0
70
°C
°C
-40
85
WOLFSON MICROELECTRONICS LTD
PD Rev 1.0 July 99
2
WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
