WM8181
Advanced Information
ELECTRICAL CHARACTERISTICS
TEST CHARACTERISTICS
AVDD = DVDD = 2.97 to 3.63V and 4.5 to 5.5V, AGND1 = AGND2 = DGND = 0V, TA = 0 to 70°C, MCLK = 24MHz
unless otherwise stated.
PARAMETER
SYMBOL
TEST
MIN
TYP
MAX
UNIT
CONDITIONS
ANALOGUE SPECIFICATION
12-bit ADC including Sample and Hold. No Missing Codes Guaranteed.
Maximum sample rate
MCLK:VSMP ratio = 12:1
2
MSPS
V
Input signal voltage for
ADC full-scale (internal
reference control)
VINP-VINM
VINP-VINM
VINP-VINM
VINP-VINM
1.5
Input signal voltage for
ADC full-scale (external
reference control)
VREFIN
V
V
V
Input signal voltage for
ADC zero-scale (internal
reference control)
0
0
Input signal voltage for
ADC zero-scale (external
reference control)
Differential non-linearity
Integral non-linearity
DNL
INL
0.5
1.5
LSB
LSB
Analogue Inputs
Input voltage limits
VINP, VINM
0
AVDD
V
References: VRT, VRB
VRT (internal reference control)
AVDD = 5V
AVDD = 3.3V
AVDD = 5V
AVDD = 3.3V
AVDD = 5V
2.85
1.70
1.35
0.95
V
V
V
V
V
VRB (internal reference control)
VRT (external reference control)
2.10 +
VREFIN/2
AVDD = 3.3V
AVDD = 5V
AVDD = 3.3V
Power down
1.35 +
VREFIN/4
V
V
VRB (external reference control)
2.10 -
VREFIN/2
1.35 -
VREFIN/4
VRT, VRB output leakage
Clamp
<1
µA
VINM to VINP leakage
VINM to VINP resistance
CLAMP low
<1
50
µA
CLAMP high, AVDD = 3.3V
VINP = VINM = 2V
Ω
VINM to VINP resistance
CLAMP high, AVDD = 5V
VINP = VINM = 1.4V
30
Ω
AI Rev 3.0 January 2000
4
WOLFSON MICROELECTRONICS LTD
WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
