WM9713 datasheet(10/111 Pages) WOLFSON

10 / 111 page

WM9713L

Preliminary Technical Data

PTD, March 2004, Rev 2.2

TOUCHPANEL AND AUXILIARY ADC

Test Conditions

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

oC, MCLK = 24.576 MHz, unless otherwise stated.

PARAMETER

SYMBOL

TEST CONDITIONS

MIN

TYP

MAX

UNIT

Input Pins X+, X-, Y+, Y-, WIPER/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

Switch matrix resistance

Ω

Programmable Pull-up resistor

RPU

RPU = 000001

Ω

Pen down detector threshold

VDD/2

PIL = 1

400

Pressure measurement current

PIL = 0

200

µA

COMPARATORS

Test Conditions

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

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