max9814etdt Maxim Integrated Products, Inc., max9814etdt Datasheet - Page 3

• Manufacturer Part Number: max9814etdt
• Description: Max9814 Microphone Amplifier With Agc And Low-noise Microphone Bias
• Manufacturer: Maxim Integrated Products, Inc.

ELECTRICAL CHARACTERISTICS (continued)
(V
at T
Note 1: Devices are production tested at T
Note 2: Dynamic range is calculated using the EIAJ method. The input is applied at -60dBFS (0.707µV
Note 3: Attack time measured as time from AGC trigger to gain reaching 90% of its final value.
Note 4: CG is connected to an external DC voltage source, and adjusted until V
Note 5: CG connected to GND with 2.2µF.
MICOUT High Output Voltage
MICOUT Low Output Voltage
MICOUT Bias
Output Impedance
Minimum Resistive Load
Maximum Capacitive Drive
Maximum Output Current
Output Short-Circuit Current
Power-Supply Rejection Ratio
MICROPHONE BIAS
Microphone Bias Voltage
Output Resistance
Output Noise Voltage
Power-Supply Rejection Ratio
TRILEVEL INPUTS (A/R, GAIN)
Tri-Level Input Leakage Current
Input High Voltage
Input Low Voltage
Shutdown Enable Time
Shutdown Disable Time
DIGITAL INPUT (SHDN)
SHDN Input Leakage Current
Input High Voltage
Input Low Voltage
AGC THRESHOLD INPUT (TH)
TH Input Leakage Current
DD
A
= 3.3V, SHDN = V
= +25°C.) (Note 1)
PARAMETER
_______________________________________________________________________________________
DD
, C
CT
= 470nF, C
Microphone Amplifier with AGC and
V
MICBIAS_NOISE
C
R
SYMBOL
I
V
R
LOAD_MAX
LOAD_MIN
OUT_MAX
MICBIAS
MICBIAS
PSRR
PSRR
Z
V
t
V
t
I
V
V
V
OFF
V
OUT
ON
SC
OH
OL
CG
IH
IH
A
IL
IL
= +25°C. Limits over temperature are guaranteed by design.
= 2µF, GAIN = V
I
I
MICOUT unconnected
1% THD, R
AGC mode; V
f = 217Hz, V
f = 1kHz, V
f = 10kHz, V
I
I
I
DC, V
I
f
A/R or GAIN = V
A/R or GAIN = GND
OUT
OUT
MICBIAS
MICBIAS
MICBIAS
MICBIAS
IN
Low-Noise Microphone Bias
= 1kHz
sourcing 1mA
sinking 1mA
DD
= 0.5mA, BW = 22Hz to 22kHz
= 0.5mA, V
= 0.5mA
= 1mA
= 2.7V to 5.5V
DD
L
RIPPLE
RIPPLE
RIPPLE
= 500Ω
, T
CONDITIONS
DD
A
DD
= T
= 2.7V to 5.5V (Note 4)
= 100mV
= 100mV
= 100mV
RIPPLE
MIN
to T
P-P
MICOUT
= 100mV
P-P
P-P
MAX
(Note 5)
(Note 5)
(Note 5)
, unless otherwise specified. Typical values are
= 1.23V.
P-P
,
/ 180kΩ
/ 180kΩ
V
0.5V
0.5V
DD
1.14
1.84
MIN
1.3
35
70
-1
-1
3
DD
DD
x 0.7
RMS
/ 100kΩ
/ 100kΩ
0.5V
0.5V
), f
TYP
2.45
1.23
52.5
200
2.0
5.5
50
50
55
43
80
71
60
40
3
5
1
8
1
IN
DD
DD
= 1kHz.
V
DD
0.5V
0.5V
/ 50kΩ
/ 50kΩ
MAX
1.32
2.18
0.5
+1
+1
x 0.3
2
DD
DD
UNITS
µV
mA
mA
mA
mV
ms
ms
kΩ
dB
dB
µA
µA
pF
Ω
Ω
RMS
V
V
V
V
V
V
V
3