WM8974GEFL/V Wolfson Microelectronics, WM8974GEFL/V Datasheet - Page 6

• Manufacturer Part Number: WM8974GEFL/V
• Description: Audio CODECs Mono Codec with Spkr
• Manufacturer: Wolfson Microelectronics

Specifications of WM8974GEFL/V

• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Package / Case: QFN-24
• Minimum Operating Temperature: - 25 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

WM8974
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ELECTRICAL CHARACTERISTICS
Test Conditions
DCVDD = 1.8V, AVDD = DBVDD = 3.3V, SPKVDD = 3.3V, T
otherwise stated.
PARAMETER
Microphone Inputs (MICN, MICP)
Full-scale Input Signal Level
(Note 1) – note this changes with
AVDD
Mic PGA equivalent input noise
Input resistance
Input resistance
Input resistance
Input resistance
Input resistance
Input Capacitance
MIC Input Programmable Gain Amplifier (PGA)
Programmable Gain
Programmable Gain Step Size
Mute Attenuation
Selectable Input Gain Boost (0/+20dB)
Gain Boost
Automatic Level Control (ALC)/Limiter – ADC only
Target Record Level
Programmable Gain
Programmable Gain Step Size
Gain Hold Time (Note 2)
Gain Ramp-Up (Decay) Time (Note
3)
Gain Ramp-Down (Attack) Time
(Note 3)
Analogue to Digital Converter (ADC)
Signal to Noise Ratio (Note 5)
Total Harmonic Distortion
(Note 6)
Auxilliary Analogue Input (AUX)
Full-scale Input Signal Level (0dB) –
note this changes with AVDD
Input Resistance
Input Capacitance
V
At 35.25dB
gain
R
R
R
R
R
C
t
t
t
SNR
THD
V
R
C
HOLD
DCY
ATK
INFS
MICIN
MICIN
MICIN
MICIP
MICIP
MICIN
INFS
AUXIN
AUXIN
SYMBOL
Guaranteed monotonic
Guaranteed Monotonic
ALCMODE=1 (limiter),
ALCMODE=1 (limiter),
ALCMODE=0 (ALC),
ALCMODE=0 (ALC),
Gain set to 35.25dB
INPPGAVOL = 0dB
PGABOOST = 0dB
MICP2INPPGA = 1
MICP2INPPGA = 0
MCLK=12.288MHz
MCLK=12.288MHz
MCLK=12.288MHz
MCLK=12.288MHz
MCLK=12.288MHz
TEST CONDITIONS
Gain set to -12dB
Gain set to 0dB
0dB PGA gain
0dB PGA gain
-1dBFS input,
AUXMODE=0
A-weighted,
(Note 4)
(Note 4)
(Note 4)
(Note 4)
(Note 4)
A
= +25
o
C, 1kHz signal, fs = 48kHz, 24-bit audio data unless
-28.5
-12
-12
0, 2.67, 5.33, 10.67, … , 43691
-75
85
MIN
0
(time doubles with each step)
(time doubles with each step)
(time doubles with each step)
(time doubles with each step)
(time doubles with each step)
0.73, 1.45, 2.91, … , 744
0.83, 1.66, 3.33, … , 852
0.18, 0.36, 0.73, … , 186
3.3, 6.6, 13.1, … , 3360
0.75
0.75
150
108
1.0
1.6
-83
1.0
47
75
94
94
10
94
20
10
TYP
0
0
PD, Rev 4.5, September 2008
35.25
35.25
MAX
20
-6
Production Data
Vrms
Vrms
dBV
dBV
UNIT
kΩ
kΩ
kΩ
kΩ
kΩ
ms
ms
ms
kΩ
uV
pF
dB
dB
dB
dB
dB
dB
dB
dB
dB
pF
6