WM8737L

Production Data

w

PD, Rev 4.4, January 2012

6

ELECTRICAL CHARACTERISTICS

Test Conditions

bit audio data, unless otherwise stated. Microphone preamplifier at maximum bias (default) and gain 13dB, unless otherwise

stated.

PARAMETER

SYMBOL

TEST CONDITIONS

MIN

TYP

MAX

UNIT

Microphone Preamplifier (LINPUT1/2/3, RINPUT1/2/3) to ADC

Microphone Pre-amp (Boost)

Gain

MICBOOST = 00

13

dB

MICBOOST = 01

18

MICBOOST = 10

28

MICBOOST = 11

33

Microphone preamplifier noise

(referred to input)

(A-weighted)

Voltage at 1kHz

Micboost gain = 28dB

6

nV /

Hz

at 20Hz – 20kHz

Micboost gain = 28dB

0.7

-123

V rms

dBV

Input Offset Voltage

1

mV

Microphone preamplifier Signal

to Noise Ratio

(A-weighted)

(Note 1)

SNR

AVDD = 3.3V

600

109

dB

AVDD=1.8V

600

102

28 dB gain,

AVDD = 3.3V

600

94

Dynamic Range (Note 2)

DNR

A-weighted, -60dBFS

Gain = 0dB

94

dB

Total Harmonic Distortion

(Note 3)

THD

13dB gain,

AVDD = 3.3V, Single

Channel

-74

0.02

dB

%

13dB gain,

AVDD=1.8V, Single

Channel

-70

0.03

Channel Separation

-65

dB

Power Supply Rejection Ratio

PSRR

1kHz, 100mV pk-pk,

60

dB

Input Leakage

Microphone preamplifier

enabled

-10

1

10

A

Input Resistance



500k

