WM8951L Ver la hoja de datos (PDF) - Wolfson Microelectronics plc

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Fabricante

WM8951L

Stereo ADC with Microphone Input and Clock Generator

Wolfson Microelectronics plc 

WM8951L

Production Data

ELECTRICAL CHARACTERISTICS

Test Conditions

AVDD1, AVDD2, DBVDD = 3.3V, AGND1, AGND2 = 0V, DCVDD = 1.5V, DGND = 0V, TA = +25oC, Slave Mode, fs = 48kHz,

XTI/MCLK = 256fs unless otherwise stated.

PARAMETER

SYMBOL

TEST

MIN

TYP

MAX

UNIT

CONDITIONS

Digital Logic Levels (CMOS Levels)

Input LOW level

VIL

0.3 x DBVDD

V

Input HIGH level

VIH

Output LOW

VOL

0.7 x DBVDD

V

0.10 x

V

DBVDD

Output HIGH

VOH

0.9 x DBVDD

V

Power On Reset Threshold (DCVDD)

DCVDD Threshold On -> Off

Vth

0.9

V

Hysteresis

VIH

DCVDD Threshold Off -> On

VOL

Analogue Reference Levels

0.3

V

0.6

V

Reference voltage (VMID)

Potential divider resistance

VVMID

RVMID

0.5xAVDD

V

50k

Ω

Line Input to ADC

Input Signal Level (0dB)

VINLINE

1.0

AVDD/3.3

Vrms

Signal to Noise Ratio

SNR

AVDD1/2= DBVDD=1.8V

75

85

dB

(Note 1,3)

DR

DCVDD=1.5V

dB

Dynamic Range (Note 3)

A-weighted, 0dB gain

@ fs = 48kHz

AVDD1/2= DBVDD=1.8V

85

DCVDD=1.5V

A-weighted, 0dB gain

@ fs = 96kHz

AVDD1/2= DBVDD=1.8V

80

88

DCVDD=1.5V

A-weighted, -60dB full

scale input

Total Harmonic Distortion

THD

AVDD1/2= DBVDD=1.8V

-76

-60

dB

DCVDD=1.5V

-1dB input, 0dB gain

Signal to Noise Ratio

SNR

AVDD1/2= DBVDD=1.8V

75

85

dB

(Note 1,3)

DCVDD=1.5V

A-weighted, 0dB gain

@ fs = 48kHz

Power Supply Rejection Ratio

PSRR

1kHz, 100mVpp

50

dB

20Hz to 20kHz,

45

100mVpp

ADC channel separation

1kHz input

90

dB

Programmable Gain

1kHz input

-34.5

0

+12

dB

Rsource < 50Ω

Programmable Gain Step Size

Guaranteed Monotonic

1.5

dB

Mute attenuation

0dB, 1kHz input

80

dB

Input Resistance

RINLINE

0dB gain

20k

30k

Ω

12dB gain

10k

15k

Input Capacitance

CINLINE

10

pF

w

PD Rev 4.1 December 2007

6

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