WM8990ECS/RV Wolfson Microelectronics, WM8990ECS/RV Datasheet - Page 25

• Manufacturer Part Number: WM8990ECS/RV
• Description: Audio CODECs Stereo CODEC w.Class AB/D speaker driver
• Manufacturer: Wolfson Microelectronics

Specifications of WM8990ECS/RV

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

w
Production Data
SPEAKER DRIVER PERFORMANCE
HEADPHONE DRIVER PERFORMANCE
0.001
0.01
0.01
0.1
10
0.1
10
1
1
0
0
Typical speaker driver THD+N performance is shown below for both Class D and Class AB modes. Curves are shown for
four typical SPKVDD supply voltage and gain combinations.
Load R
Typical THD+N performance of the Headphone Drivers is shown below (AC coupled to LOUT/ROUT). Curves are shown
for four HPVDD/AVDD supply voltages.
Load R
10
AC Coupled Headphone into 16Ω
Speaker Class D into 8Ω + 10μH
0.25
L
L
= 8Ω + 10μH, Frequency = 1kHz, +1dB gain in active path.
= 16Ω and 32Ω, Frequency = 1kHz, +1dB gain in active path.
20
AC Coupled Headphone (16ohm)
Speaker Class D (8Ω+10μH)
THD+N Ratio v Output Power
THD+N Ratio v Output Power
0.5
30
Output Power (mW)
Output Power (W)
0.75
40
50
1
SPKVDD=5.0V, AC=DC=1.52x
SPKVDD=4.2V, AC=DC=1.27x
SPKVDD=3.6V, AC=DC=1.00x
SPKVDD=3.3V, AC=DC=1.00x
60
HPVDD=AVDD=3.6V
HPVDD=AVDD=3.3V
HPVDD=AVDD=3.0V
HPVDD=AVDD=2.7V
1.25
70
1.5
80
0.01
0.001
0.1
0.01
10
0.1
1
10
1
0
0
10
Speaker Class AB into 8Ω + 10μH
AC Coupled Headphone into 32Ω
0.25
20
AC Coupled Headphone (32ohm)
Speaker Class AB (8Ω+10μH)
THD+N Ratio v Output Power
THD+N Ratio v Output Power
0.5
30
Output Power (mW)
Output Power (W)
0.75
40
PD, March 2009, Rev 4.0
50
SPKVDD=5.0V, AC=DC=1.52x
SPKVDD=4.2V, AC=DC=1.27x
SPKVDD=3.6V, AC=DC=1.00x
SPKVDD=3.3V, AC=DC=1.00x
1
60
WM8990
HPVDD=AVDD=3.6V
HPVDD=AVDD=3.3V
HPVDD=AVDD=3.0V
HPVDD=AVDD=2.7V
1.25
70
1.5
25
80