User's Manual

HiLo3G-850 User Manual
04 March 2011 - Page 14 / 36
voltage
MIC1N,
MIC2P and MIC2N, or
LINEIN_LP and
LINEIN_LN, 0 dB gain
Voltage across either MIC1P and
MIC1N,
MIC2P and MIC2N, or
LINEIN_LP and
LINEIN_LN, 24 dB gain
56.2
61.3
70.8
Vrms
Gain error
(absolute)
0 and 24 dB gain settings for all
inputs.
Measured at 13 dB below the
maximum
input level for the given gain
setting.
-1
0.2
1
dB
Output referred
noise
0 dB gain, input grounded
A-weighted
–
-86.92
-
88.91
dBFS
24 dB gain, input grounded
A-weighted
–
-83.92
-
83.92
dBFS
Input
impedance
Differential mode
16
20
24
kΩ
Single-ended mode
8
10
12
kΩ
Parameter
Test conditions
Min
Typ
Max
Units
Notes
THD+N ratio
0 dB analog gain
Input frequency = 1.02 kHz
Output = -1 dBFS
40
90.84
–
dB
Measurement BW =
22 to Fs/2; (no
A-weighting)
24 dB analog gain
Input frequency = 1.02 kHz
Output = -1 dBFS
40
82.43
–
dB
Input
capacitance
At each pin, for all inputs
–
–
5
pF
Input offset
voltage
-5
–
5
mV
Signal-to-noise
ratio
0 dB gain, input grounded
A-weighted
TBD
TBD
–
dB
24 dB gain, input grounded
A-weighted
TBD
TBD
–
dB
Sensitivity
- 39 dB
~-42 dB
SPL(0 dB
= 1 V/Pa
@ 1kHz)
Figure 13: Microphone performance requirements
3.2.2.4 Recommended Speaker Characteristics
Item to be inspected
Acceptance criterion
Input power: rated / max
0.1W (Rate)
Audio chain impedance
32 ohm +/- 10% at 1V 1KHz
Frequency Range
300 Hz ~ 4.0 KHz
Sensitivity (S.P.L)
>105 dB at 1KHz with IEC318 coupler
Distortion
5% max at 1K Hz, nominal input power