Datasheet

-120
-100
-80
-60
-40
-20
0
10 100 1000 10000 100000
FREQUENCY (Hz)
PSRR (dB)
10
20
FFNSE (dB)
FREQUENCY (Hz)
300
100
30
10k
4k
1k
25
35
40
15
5
0
2k
-120
-100
-80
-60
-40
-20
0
10 100 1000 10000 100000
FREQUENCY (Hz)
PSRR (dB)
-120
-100
-80
-60
-40
-20
0
10 100 1000 10000 100000
FREQUENCY (Hz)
PSRR (dB)
0.01
0.1
1
10
100
0.001 0.01 0.1 1
THD+N (%)
INPUT VOLTAGE (V
P-P
)
INPUT VOLTAGE (V
P-P
)
0.01
0.1
1
10
100
0.001 0.01 0.1 1
THD+N (%)
LMV1089
www.ti.com SNAS441H –SEPTEMBER 2008–REVISED MAY 2010
TYPICAL PERFORMANCE CHARACTERISTICS (continued)
Unless otherwise specified, T
J
= 25°C, V
DD
= 3.3V, Input Voltage = 18mV
P-P
, f =1 kHz, pass through mode (The voltage at
I
2
CV
DD
must not exceed the voltage on V
DD
), Pre Amp gain = 20dB, Post Amp gain = 6dB, R
L
= 100kΩ, and C
L
= 4.7pF.
THD+N THD+N
vs vs
Input Voltage, f = 1kHz Input Voltage, f = 1kHz
Mic1 Pass Through Mode Mic2 Pass Through Mode
Figure 14. Figure 15.
PSRR PSRR
vs vs
Frequency, Pre Amp Gain = 20dB, Post Amp Gain = 6dB Frequency, Pre Amp Gain = 20dB, Post Amp Gain = 6dB
V
RIPPLE
= 100mV
P-P
, Mic1 = Mic2 = AC GND V
RIPPLE
= 100mV
P-P
, Mic1 = Mic2 = AC GND
Mic1 Pass Through Mode Mic2 Pass Through Mode
Figure 16. Figure 17.
PSRR
vs
Frequency, Pre Amp Gain = 20dB, Post Amp Gain = 6dB Far Field Noise Suppression Electrical
V
RIPPLE
= 100mV
P-P
, Mic1 = Mic2 = AC GND vs
Noise Canceling Mode Frequency
Figure 18. Figure 19.
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