Wolfson WM9090, Руководство пользователя

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WM9090
Production Data
w
PD, November 2010, Rev 4.1
8
Test Conditions
SPKVDD = 3.6V, AVDD=1.8V, GND=0V, T
A
= +25
o
C, 1kHz signal, PGA gain = 0dB unless otherwise stated
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
Speaker Driver Class D Audio Performance (R
L
=8 Ω + 10 μ H BTL)
SNR (A-weighted) Speaker Boost = 6dB, 82 92 dB
THD (P
O
=500mW) Speaker Boost = 6dB -75 dB
THD+N (P
O
=500mW) Speaker Boost = 6dB -73 dB
PSRR
AVDD with 100mVpk-pk at 217Hz (Note 1) 75 dB
SPKVDD with 100mVpk-pk at 217Hz 70 dB
DC Offset at Load 5 mV
Efficiency Speaker Boost = 6dB, 0dBFS input 80 89 %
Output Power SPKVDD=5.0V, THD+N ≤ 1%,
Speaker Boost = 12dB
1300 mW
SPKVDD=4.2V, THD+N ≤ 1%,
Speaker Boost = 12dB
950 mW
SPKVDD=3.7V, THD+N ≤ 1%,
Speaker Boost = 12dB
750 mW
Quiescent Current 3 mA
Leakage Currents
SVDD Leakage Current 0.2 μ A
HPVDD Leakage Current
VMID_ENA = 0, VMID_BUF_ENA = 0, and
TSHUT_ENA = 0
1 μ
A
Analogue Reference Level
VMID Midrail Reference Voltage -3% AVDD/2 +3% V
Charge Pump
Start-up Time
500
μ
s
Supply Voltage 1.71 2.0 V
CPVOUTP Normal mode AVDD V
Low power mode AVDD/2
CPVOUTN Normal mode -AVDD V
Low power mode -AVDD/2
Flyback Capacitor
(between CPCA and CPCB) at 2V 1 2.2
μ
F
CPVOUTP Capacitor at 2V 2 2.2
μ
F
CPVOUTN Capacitor at 2V 2 2.2 μ F
Digital Input / Output
Input HIGH Level 0.7
×
AVDD
V
Input LOW Level 0.3
×
AVDD
V
Output HIGH Level
I
OL
= 1mA 0.7
×
AVDD
V
Output LOW Level
I
OH
= -1mA 0.3
×
AVDD
V
Input capacitance
10 pF
Input leakage -0.9 0.9 uA
Start-Up Time
Start up time Speaker and Headphone -35 ms
Note 1: Total system PSRR with external DC-DC or LDO will be higher