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WM2633 Datasheet(PDF) 6 Page - Wolfson Microelectronics plc

Part No. WM2633
Description  Byte-wide Parallel Input, 12-bit 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

WM2633 Datasheet(HTML) 6 Page - Wolfson Microelectronics plc

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WM2633
Production Data
WOLFSON MICROELECTRONICS LTD
PD Rev 1.0 July 1999
6
8. IDD is measured while continuously writing code 2048 to the DAC. For VIH < DVDD - 0.7V and VIL > 0.7V
supply current will increase.
9. Typical supply current in powerdown mode is 10nA. Production test limits are wider for speed of test.
10. Slew rate results are for the lower value of the rising and falling edge slew rates.
11. Settling time is the time taken for the signal to settle to within 0.5LSB of the final measured value for both rising and
falling edges. Limits are ensured by design and characterisation, but are not production tested.
12. SNR, SNRD, THD and SPFDR are measured on a synthesised sinewave at frequency fOUT generated with
a sampling frequency fS .
PARALLEL INTERFACE
D[0-7]
A[0-1]
NCS
NWE
NLDAC
Data
X
X
Address
X
X
t
SUD
t
HD
t
SUA
t
SUCSWE
t
WWE
t
SUWELD
t
WLD
t
HA
Figure 1 Timing Diagram
SYMBOL
TEST
CONDITIONS
MIN
TYP
MAX
UNIT
tSUCSWE
Setup time NCS low before positive NWE edge
15
ns
tSUD
Data ready before positive NWE edge
10
ns
tHD
Data hold after positive NWE edge
5ns
tSUA
Setup time for address bits A0, A1
20
ns
tSUWELD
Positive NWE edge before NLDAC low
5ns
tWWE
High pulse width of NWE
20
ns
tWLD
Low pulse width of NLDAC
23
ns


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