WM9714L_06 datasheet(9/94 Pages) WOLFSON

9 / 94 page

Pre-Production

WM9714L

PP Rev 3.0 June 2006

AUXILIARY ADC

Test Conditions

DBVDD = 3.3V, DCVDD = 3.3V, AVDD = 3.3V, TA = +25

oC, unless otherwise stated.

PARAMETER

SYMBOL

TEST CONDITIONS

MIN

TYP

MAX

UNIT

Input Pins AUX4, COMP1/AUX1, COMP2/AUX2

Input Voltage

AGND

AVDD

Input leakage current

AUX pin not selected as

AUX ADC input

<10

ADC Resolution

bits

Differential Non-Linearity Error

DNL

±0.25

±1

LSB

Integral Non-Linearity Error

INL

±2

LSB

Offset Error

±4

LSB

Gain Error

±6

LSB

Power Supply Rejection

PSRR

Channel-to-channel isolation

Throughput Rate

DEL = 1111

(zero settling time)

kHz

Settling Time (programmable)

MCLK = 24.576MHz

COMPARATORS

Test Conditions

DBVDD = 3.3V, DCVDD = 3.3V, AVDD = 3.3V, TA = +25

oC, unless otherwise stated.

PARAMETER

SYMBOL

TEST CONDITIONS

MIN

TYP

MAX

UNIT

COMP1/AUX1 and COMP2/AUX2 (pins 29, 30 – when not used as mic inputs)

Input Voltage

AGND

AVDD

Input leakage current

pin not selected as AUX

ADC input

<10

Comparator Input Offset

(COMP1, COMP2 only)

-50

+50

COMP2 delay (COMP2 only)

MCLK = 24.576MHz

10.9

REFERENCE VOLTAGES

Test Conditions

DBVDD=3.3V, DCVDD = 3.3V, AVDD = 3.3V, TA = +25

oC, 1kHz signal, fs = 48kHz, 24-bit audio data unless otherwise stated.

PARAMETER

SYMBOL

TEST CONDITIONS

MIN

TYP

MAX

UNIT

Audio ADCs, DACs, Mixers

Reference Input/Output

CAP2 pin

1.63

1.65

1.66

Buffered Reference Output

VREF pin

1.64

1.65

1.67

Microphone Bias

Bias Voltage

VMICBIAS

2.92

2.97

3.00

Bias Current Source

IMICBIAS

Output Noise Voltage

1K to 20kHz

nV/

√Hz

WM9714L Datasheet(PDF) 9 Page - Wolfson Microelectronics plc

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