Pre-Production
WM9714L
AUXILIARY ADC
Test Conditions
DBVDD = 3.3V, DCVDD = 3.3V, AVDD = 3.3V, T
A
= +25
o
C, unless otherwise stated.
PARAMETER
Input Voltage
Input leakage current
ADC Resolution
Differential Non-Linearity Error
Integral Non-Linearity Error
Offset Error
Gain Error
Power Supply Rejection
Channel-to-channel isolation
Throughput Rate
Settling Time (programmable)
DEL = 1111
(zero settling time)
MCLK = 24.576MHz
0
PSRR
50
80
48
6
DNL
INL
AUX pin not selected as
AUX ADC input
SYMBOL
TEST CONDITIONS
MIN
AGND
<10
12
±0.25
±1
±2
±4
±6
TYP
MAX
AVDD
UNIT
V
nA
bits
LSB
LSB
LSB
LSB
dB
dB
kHz
ms
Input Pins AUX4, COMP1/AUX1, COMP2/AUX2
COMPARATORS
Test Conditions
DBVDD = 3.3V, DCVDD = 3.3V, AVDD = 3.3V, T
A
= +25
o
C, unless otherwise stated.
PARAMETER
Input Voltage
Input leakage current
Comparator Input Offset
(COMP1, COMP2 only)
COMP2 delay (COMP2 only)
MCLK = 24.576MHz
pin not selected as AUX
ADC input
-50
0
SYMBOL
TEST CONDITIONS
MIN
AGND
<10
+50
10.9
TYP
MAX
AVDD
UNIT
V
nA
mV
s
COMP1/AUX1 and COMP2/AUX2 (pins 29, 30 – when not used as mic inputs)
REFERENCE VOLTAGES
Test Conditions
DBVDD=3.3V, DCVDD = 3.3V, AVDD = 3.3V, T
A
= +25
o
C, 1kHz signal, fs = 48kHz, 24-bit audio data unless otherwise stated.
PARAMETER
Audio ADCs, DACs, Mixers
Reference Input/Output
Buffered Reference Output
Microphone Bias
Bias Voltage
Bias Current Source
Output Noise Voltage
V
MICBIAS
I
MICBIAS
Vn
1K to 20kHz
15
2.92
2.97
3.00
3
V
mA
nV/√Hz
CAP2 pin
VREF pin
1.63
1.64
1.65
1.65
1.66
1.67
V
V
SYMBOL
TEST CONDITIONS
MIN
TYP
MAX
UNIT
w
PP Rev 3.0 June 2006
9
WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
