WM8903LGEFK/RV Wolfson Microelectronics, WM8903LGEFK/RV Datasheet - Page 13

• Manufacturer Part Number: WM8903LGEFK/RV
• Description: Audio CODECs ULTRA LOW PWR HI FI CODEC
• Manufacturer: Wolfson Microelectronics

Specifications of WM8903LGEFK/RV

• Audio Codec Type: Stereo Codec
• No. Of Adcs: 2
• No. Of Dacs: 2
• No. Of Input Channels: 6
• No. Of Output Channels: 8
• Adc / Dac Resolution: 24bit
• Sampling Rate: 96kHz
• Operating Temperature Range: -40°C To +85°C
• Rohs Compliant: Yes
• Adcs / Dacs Signal To Noise Ratio: 96dB
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Pre-Production
CHARGE PUMP
OTHER PARAMETERS
Notes:
1.
2.
3.
w
Digital Inputs / Outputs
PARAMETER
Input HIGH Level
Input LOW Level
Output HIGH Level
Output LOW Level
PARAMETER
Charge pump start-up time
External component requirements
To achieve specified headphone output power and performance
Flyback capacitor
(between CFB1 and CFB2 pins)
VPOS capacitor
VNEG capacitor
VMID Reference
PARAMETER
Midrail Reference Voltage (VMID pin)
Microphone bias (for analogue electret condenser microphones)
Additional test conditions: MICBIAS_ENA=1, all parameters measured at the MICBIAS pin
PARAMETER
Bias Voltage
Maximum source current
Noise spectral density
Power Supply Rejection Ratio
MICBIAS Current Detect Function (See Notes 1, 2)
Current Detect Threshold
(Microphone insertion)
Current Detect Threshold
(Microphone removal)
Delay Time for Current Detect
Interrupt
MICBIAS Short Circuit (Hook Switch) Detect Function (See Notes 1, 2)
Short Circuit Detect Threshold
(Button press)
Short Circuit Detect Hysteresis
(See Note 3)
Minimum Delay Time for
Short Circuit Detect Interrupt
Short Circuit Detect
measurement frequency
If AVDD
MICBIAS current detect and short circuit (Hook switch) detect functionality tested using GPIO pin rather than by
interrupt.
Hysteresis = difference between Button Press and Button Release thresholds
≠
1.8, current threshold values should be multiplied by (AVDD/1.8)
SYMBOL
V
V
V
V
SYMBOL
OH
OL
V
IH
IL
I
t
PSRR
MICBIAS
SHORT
MICBIAS
t
DET
TEST CONDITIONS
TEST CONDITIONS
SYMBOL
MICSHORT_THR = 00
I
20kHz, 100mV pk-pk
I
OH
TEST CONDITIONS
1kHz, 100mV pk-pk
MICDET_THR = 00
C
OL
3mA load current
FB
= +1mA
= -1mA
At 1kHz
TEST CONDITIONS
0.7×DBVDD
0.9×DBVDD
at 2V
at 2V
at 2V
MIN
MIN
–3%
-5%
MIN
400
15
AVDD/2
TYP
TYP
MIN
0.9×AVDD
1
2
2
1.25-15
TYP
520
250
19
50
70
50
40
4
TYP
PP, Rev 3.1, August 2009
0.3×DBVDD
0.1×DBVDD
40
MAX
MAX
+3%
MAX
+5%
MAX
100
647
WM8903
UNIT
UNIT
nV/√Hz
V
V
V
V
V
UNIT
UNIT
mA
ms
ms
μF
μF
μF
dB
μA
μA
Hz
μs
V
13