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WM8255 Datasheet(PDF) 8 Page - Cirrus Logic

Part # WM8255
Description  Single Channel 16-bit CIS/CCD AFE with RGB LED Current Drive
PDF  49 Pages
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Manufacturer  CIRRUS [Cirrus Logic]
Direct Link  http://www.cirrus.com
Logo CIRRUS - Cirrus Logic

WM8255 Datasheet(HTML) 8 Page - Cirrus Logic

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Production Data
WM8255
w
PD, Rev 4.7, August 2013
8
Test Conditions
AVDD1 = 5.75V, DVDD = 3.3V, AGND = DGND = AVDD2 = 0V, TA = 25C, MCLK = 24MHz unless otherwise stated.
PARAMETER
SYMBOL
TEST
CONDITIONS
MIN
TYP
MAX
UNIT
Programmable Gain Amplifier
Resolution
8
bits
Gain equation
255
7.57
0]
:
PGA[7
0.78
V/V
Max gain
GMAX
8
8.35
8.7
V/V
Min gain
GMIN
0.72
0.78
0.82
V/V
Internal channel offset
VOFF
10
mV
Analogue to Digital Converter
Resolution
16
bits
Maximum Speed
12
MSPS
Full-scale input range
(2*(VRT-VRB))
VFS
2.0
V
DIGITAL SPECIFICATIONS
Digital Inputs
High level input voltage
VIH
0.7
 DVDD
V
Low level input voltage
VIL
0.2
 DVDD
V
High level input current
IIH
1
A
Low level input current
IIL
1
A
Input capacitance
CI
5
pF
Digital Outputs
High level output voltage
VOH
IOH = 1mA
DVDD - 0.5
V
Low level output voltage
VOL
IOL = 1mA
0.5
V
Supply Currents (LED Current DAC switched off)
Total supply current
 active
42.5
mA
Total analogue AVDD, supply
current
 active
IAVDD
39
mA
Total digital core, DVDD, supply
current
 active
IDVDD1
3.5
mA
Supply current
 full power down
mode
500
A
Notes:
1.
Digital I/O supply current depends on the capacitive load attached to the pin. The Digital I/O supply current is
measured with approximately 50pF attached to the pin.



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