MAX4466EXK+T [MAXIM]

Audio Preamplifier, 1 Channel(s), 1 Func, BICMOS, PDSO5, SC-70, 5 PIN;
MAX4466EXK+T
型号: MAX4466EXK+T
厂家: MAXIM INTEGRATED PRODUCTS    MAXIM INTEGRATED PRODUCTS
描述:

Audio Preamplifier, 1 Channel(s), 1 Func, BICMOS, PDSO5, SC-70, 5 PIN

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19-1950; Rev 2; 6/12  
Low-Cost, Micropower, SC70/SOT23-8, Microphone  
Preamplifiers with Complete Shutdown  
5–MAX469  
General Description  
Features  
The MAX4465–MAX4469 are micropower op amps opti-  
mized for use as microphone preamplifiers. They pro-  
vide the ideal combination of an optimized gain  
bandwidth product vs. supply current, and low voltage  
operation in ultra-small packages. The MAX4465/  
MAX4467/MAX4469 are unity-gain stable and deliver a  
200kHz gain bandwidth from only 24µA of supply cur-  
rent. The MAX4466/MAX4468 are decompensated for a  
minimum stable gain of +5V/V and provide a 600kHz  
gain bandwidth product. In addition, these amplifiers  
®
o +2.4V to +5.5V Supply Voltage Operation  
o Versions with 5nA Complete Shutdown Available  
(MAX4467/MAX4468)  
o Excellent Power-Supply Rejection Ratio: 112dB  
o Excellent Common-Mode Rejection Ratio: 126dB  
o High A  
: 125dB (R = 100k)  
L
VOL  
o Rail-to-Rail Outputs  
feature Rail-to-Rail outputs, high A  
plus excellent  
VOL  
,
o Low 24µA Quiescent Supply Current  
power-supply rejection and common-mode rejection  
ratios for operation in noisy environments.  
o Gain Bandwidth Product:  
200kHz (MAX4465/MAX4467/MAX4469)  
The MAX4467/MAX4468 include a complete shutdown  
mode. In shutdown, the amplifiers’ supply current is  
reduced to 5nA and the bias current to the external  
microphone is cut off for ultimate power savings. The  
single MAX4465/MAX4466 are offered in the ultra-small  
5-pin SC70 package, while the single with shutdown  
MAX4467/MAX4468 and dual MAX4469 are available in  
the space-saving 8-pin SOT23 package.  
600kHz A 5 (MAX4466/MAX4468)  
V
o Available in Space-Saving Packages  
5-Pin SC70 (MAX4465/MAX4466)  
8-Pin SOT23 (MAX4467/MAX4468/MAX4469)  
Ordering Information  
PART  
TEMP RANGE  
-40°C to +85°C  
-40°C to +85°C  
-40°C to +85°C  
-40°C to +85°C  
PIN-PACKAGE  
5 SC70  
MAX4465EXK+T  
MAX4465EUK+T  
MAX4466EXK+T  
MAX4466EUK+T  
5 SOT23  
5 SC70  
Applications  
Microphone Preamplifiers  
5 SOT23  
Hearing Aids  
+Denotes a lead(Pb)-free/RoHS-compliant package.  
Cellular Phones  
Ordering Information continued at end of data sheet.  
Voice-Recognition Systems  
Digital Dictation Devices  
Headsets  
Typical Operating Circuit  
Portable Computing  
V
CC  
Pin Configurations  
SHDN  
R
BIAS  
MIC_BIAS  
IN+  
TOP VIEW  
C
R
BIAS  
R
DC  
+
1
2
3
5
V
IN+  
GND  
IN-  
CC  
R
BIAS  
OUT  
MAX4465  
MAX4466  
C
IN  
IN  
IN-  
MAX4467  
MAX4468  
C
BYPASS  
R
DC  
4
OUT  
GND  
SC70/SOT23  
Pin Configurations continued at end of data sheet.  
MICROPHONE  
CAPSULE  
R
FB  
MAX4467/MAX4468 TYPICAL OPERATING CIRCUIT WITH  
COMPLETE SHUTDOWN  
Rail-to-Rail is a registered trademark of Nippon Motorola, Ltd.  
1
For pricing, delivery, and ordering information, please contact Maxim Direct  
at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.  
Low-Cost, Micropower, SC70/SOT23-8, Microphone  
Preamplifiers with Complete Shutdown  
ABSOLUTE MAXIMUM RATINGS  
Supply Voltage (V  
to GND)................................................+6V  
8-Pin SOT23 (derate 5.3mW/°C above +70°C)...........421mW  
Operating Temperature Range ...........................-40°C to +85°C  
Storage Temperature Range.............................-65°C to +150°C  
Junction Temperature......................................................+150°C  
Lead Temperature (soldering, 10s) .................................+300°C  
Soldering Temperature (reflow) .......................................+260°C  
CC  
All Other Pins to GND.................................-0.3V to (V  
Output Short-Circuit Duration  
+ 0.3V)  
CC  
OUT Shorted to GND or V .................................Continuous  
CC  
Continuous Power Dissipation (T = +70°C)  
A
5-Pin SC70 (derate 2.5mW/°C above +70°C) .............200mW  
5-Pin SOT23 (derate 7.1mW/°C above +70°C)...........571mW  
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional  
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to  
absolute maximum rating conditions for extended periods may affect device reliability.  
ELECTRICAL CHARACTERISTICS  
(V  
= +5V, V  
= 0V, V  
= V /2, R = to V /2, SHDN = GND (MAX4467/MAX4468 only). T = T  
to T  
, unless other-  
MAX  
CC  
CM  
OUT  
CC  
L
CC  
A
MIN  
wise noted. Typical values specified at T = +25°C.) (Note 1)  
A
PARAMETER  
SYMBOL  
CONDITIONS  
Inferred from PSRR test  
MIN  
TYP  
MAX  
5.5  
UNITS  
Supply Voltage Range  
V
2.4  
V
CC  
5–MAX469  
T
T
= +25°C  
24  
48  
60  
50  
5
Supply Current  
(Per Amplifier)  
A
A
I
µA  
CC  
= T  
to T  
MAX  
MIN  
Supply Current in Shutdown  
Input Offset Voltage  
I
SHDN = V  
(Note 2)  
5
nA  
mV  
nA  
nA  
V
SHDN  
CC  
V
1
OS  
Input Bias Current  
I
V
V
= -0.1V  
2.5  
1
100  
15  
B
CM  
CM  
Input Offset Current Range  
Input Common-Mode Range  
I
= -0.1V  
OS  
V
Inferred from CMRR test  
-0.1V V V - 1V  
-0.1  
80  
V
- 0.1  
CC  
CM  
Common-Mode Rejection Ratio CMRR  
126  
112  
75  
dB  
CM  
CC  
2.4V V 5.5V  
80  
CC  
Power-Supply Rejection Ratio  
PSRR  
MAX4465/MAX4467/MAX4469, f = 3.4kHz  
MAX4466/MAX4468, f = 3.4kHz  
dB  
80  
R = 100kto V /2,  
L
CC  
125  
95  
0.05V V  
V  
- 0.05V  
OUT  
CC  
Open-Loop Gain  
A
dB  
VOL  
R = 10kto V /2,  
L
CC  
80  
0.1V V  
V  
CC  
- 0.1V  
OUT  
R = 100kΩ  
10  
16  
10  
14  
15  
L
Output Voltage Swing High  
V
V
- V  
mV  
I
OHI  
OH  
CC  
R = 10kΩ  
L
50  
50  
R = 100kΩ  
L
Output Voltage Swing Low  
Output Short-Circuit Current  
V
mV  
mA  
nA  
OL  
R = 10kΩ  
L
To either supply rail  
Output Leakage Current  
in Shutdown  
SHDN = V , 0 V  
(Notes 2, 3)  
V  
CC  
;
CC  
OUT  
0.5  
100  
SHDN Logic Low  
SHDN Logic High  
SHDN Input Current  
V
(Note 2)  
V
CC  
0.3  
V
V
IL  
V
(Note 2)  
V
0.7  
IH  
CC  
(Note 2)  
2
25  
nA  
MAX4465/MAX4467/MAX4469  
MAX4466/MAX4468  
200  
600  
Gain Bandwidth Product  
GBWP  
kHz  
2
Low-Cost, Micropower, SC70/SOT23-8, Microphone  
Preamplifiers with Complete Shutdown  
5–MAX469  
ELECTRICAL CHARACTERISTICS (continued)  
(V  
= +5V, V  
= 0V, V  
= V /2, R = to V /2, SHDN = GND (MAX4467/MAX4468 only), T = T  
to T  
, unless other-  
MAX  
CC  
CM  
OUT  
CC  
CC  
A
MIN  
L
wise noted. Typical values specified at T = +25°C.) (Note 1)  
A
PARAMETER  
SYMBOL  
CONDITIONS  
MAX4469 only, f = 1kHz  
R = 100kΩ  
MIN  
TYP  
MAX  
UNITS  
Channel-to-Channel Isolation  
85  
dB  
degrees  
dB  
Phase Margin  
Gain Margin  
Ø
70  
20  
M
L
R = 100kΩ  
L
MAX4465/MAX4467/  
MAX4469,  
45  
A = +1  
V
Slew Rate  
SR  
Output step = 4V  
f = 1kHz  
mV/µs  
MAX4466/MAX4468,  
A = +5  
V
300  
80  
Input Noise Voltage Density  
Total Harmonic Distortion  
e
nV/Hz  
n
MAX4465/MAX4467/  
MAX4469  
0.02  
f = 1kHz, R = 10k,  
L
THD  
%
V
= 2Vp-p  
OUT  
MAX4466/MAX4468  
0.03  
100  
MAX4465/MAX4467/MAX4469, A = +1  
V
Capacitive Load Stability  
C
pF  
LOAD  
MAX4466/MAX4468, A = +5  
V
100  
1
SHDN Delay Time  
Enable Delay Time  
Power-On Time  
t
(Note 2)  
(Note 2)  
(Note 2)  
µs  
µs  
µs  
SHDN  
t
50  
40  
20  
EN  
t
ON  
Bias Switch On-Resistance  
R
I = 5mA (Note 2)  
S
500  
S
Note 1: All specifications are 100% production tested at T = +25°C. All temperature limits are guaranteed by design.  
A
Note 2: Shutdown mode is available only on the MAX4467/MAX4468.  
Note 3: External feedback networks not considered.  
Typical Operating Characteristics  
(V  
noted.)  
= +5V, V  
= 0V, V  
= V /2, R = 100kto V /2, SHDN = GND (MAX4467/MAX4468 only), T = +25°C, unless otherwise  
CC  
CM  
OUT  
CC  
L
CC  
A
MAX4465/MAX4467/MAX4469  
GAIN AND PHASE vs. FREQUENCY (NO LOAD)  
140  
120  
100  
80  
MAX4465/MAX4467/MAX4469  
MAX4466/MAX4468 GAIN AND PHASE  
vs. FREQUENCY (NO LOAD)  
GAIN AND PHASE vs. FREQUENCY (C = 100pF)  
L
140  
140  
120  
100  
80  
120  
100  
80  
60  
40  
20  
0
60  
40  
20  
0
60  
40  
20  
0
-20  
-40  
-60  
-80  
-100  
-120  
-140  
-160  
-20  
-40  
-60  
-80  
-100  
-120  
-140  
-20  
-40  
-60  
-80  
-100  
-120  
-140  
0.1  
1
10 100 1k  
10k 100k  
1M  
0.1  
1
10 100  
1k 10k 100k  
1M  
1
10  
100  
1k  
10k  
100k  
1M  
FREQUENCY (Hz)  
FREQUENCY (Hz)  
FREQUENCY (Hz)  
3
Low-Cost, Micropower, SC70/SOT23-8, Microphone  
Preamplifiers with Complete Shutdown  
Typical Operating Characteristics (continued)  
(V  
noted.)  
= +5V, V  
= 0V, V  
= V /2, R = 100kto V /2, SHDN = GND (MAX4467/MAX4468 only), T = +25°C, unless otherwise  
CC  
CM  
OUT  
CC  
L
CC  
A
POWER-SUPPLY REJECTION RATIO  
vs. FREQUENCY  
SHUTDOWN SUPPLY CURRENT  
vs. TEMPERATURE  
SUPPLY CURRENT vs. TEMPERATURE  
10,000  
1000  
100  
10  
27  
26  
25  
24  
23  
22  
V
= V  
CC  
SHDN  
-10  
-30  
-50  
-70  
-90  
-110  
-130  
1
10  
100  
1k  
10k  
100k  
1M  
-40  
-15  
10  
35  
60  
85  
-40  
-15  
10  
35  
60  
85  
5–MAX469  
FREQUENCY (Hz)  
TEMPERATURE (°C)  
TEMPERATURE (°C)  
CHANNEL-TO-CHANNEL ISOLATION  
vs. FREQUENCY  
INPUT OFFSET VOLTAGE  
vs. TEMPERATURE  
OUTPUT LEAKAGE CURRENT  
vs. TEMPERATURE  
0
-20  
-40  
-60  
600  
400  
200  
0
1000  
100  
10  
V
V
= V  
CC  
SHDN  
= V /2  
CC  
OUT  
-200  
-400  
-600  
1
-80  
-100  
0.1  
0.1  
1
10  
100  
1000  
-40  
-15  
10  
35  
60  
85  
-40  
-15  
10  
35  
60  
85  
FREQUENCY (kHz)  
TEMPERATURE (°C)  
TEMPERATURE (°C)  
COMMON-MODE REJECTION RATIO  
vs. TEMPERATURE  
OUTPUT VOLTAGE SWING LOW  
vs. TEMPERATURE  
OUTPUT VOLTAGE SWING HIGH  
vs. TEMPERATURE  
-100  
-102  
-104  
-106  
-108  
-110  
-112  
-114  
-116  
-118  
-120  
5
4
3
5
4
3
2
1
0
2
1
0
-40  
-15  
10  
35  
60  
85  
-40  
-15  
10  
35  
60  
85  
-40  
-15  
10  
35  
60  
85  
TEMPERATURE (°C)  
TEMPERATURE (°C)  
TEMPERATURE (°C)  
4
Low-Cost, Micropower, SC70/SOT23-8, Microphone  
Preamplifiers with Complete Shutdown  
5–MAX469  
Typical Operating Characteristics (continued)  
(V  
noted.)  
= +5V, V  
= 0V, V  
= V /2, R = 100kto V /2, SHDN = GND (MAX4467/MAX4468 only), T = +25°C, unless otherwise  
CC  
CM  
OUT  
CC  
L
CC  
A
LARGE-SIGNAL GAIN  
vs. TEMPERATURE  
MINIMUM OPERATING VOLTAGE  
vs. TEMPERATURE  
LARGE-SIGNAL GAIN  
vs. OUTPUT VOLTAGE  
130  
125  
120  
115  
110  
105  
100  
95  
130  
125  
120  
115  
110  
1.6  
1.5  
1.4  
1.3  
1.2  
1.1  
1.0  
90  
85  
80  
0
0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0  
(V)  
-40  
-15  
10  
35  
60  
85  
-40  
-15  
10  
35  
60  
85  
V
TEMPERATURE (°C)  
TEMPERATURE (°C)  
OUT  
MAX4465/MAX4467/MAX4469  
MAX4465/MAX4467/MAX4469  
MAX4466/MAX4468  
TOTAL HARMONIC DISTORTION PLUS NOISE  
vs. FREQUENCY  
TOTAL HARMONIC DISTORTION PLUS NOISE  
vs. INPUT AMPLITUDE  
100  
TOTAL HARMONIC DISTORTION  
vs. FREQUENCY  
100  
10  
1
100  
10  
1
V
A
= 2Vp-p  
OUT  
= +10V/V  
BW = 22kHz  
V
A
= 2Vp-p  
= +1V/V  
f = 1kHz  
= +1V/V  
OUT  
V
V
A
V
BW = 22kHz  
BW = 122kHz  
10  
1
R = 10kΩ  
L
R = 10kΩ  
L
R = 10kΩ  
L
0.1  
0.1  
0.1  
R = 100kΩ  
L
0.01  
0.01  
0.01  
R = 100kΩ  
L
R = 100kΩ  
L
0.001  
0.001  
0.001  
0
0.5  
1.0  
1.5  
(Vp-p)  
2.0  
2.5  
3.0  
20  
200  
2k  
20k  
20  
200  
2k  
20k  
FREQUENCY (Hz)  
V
FREQUENCY (Hz)  
IN  
MAX4466/MAX4468  
TOTAL HARMONIC DISTORTION PLUS NOISE  
vs. INPUT AMPLITUDE  
NONINVERTING SMALL-SIGNAL  
TRANSIENT RESPONSE  
NONINVERTING LARGE-SIGNAL  
TRANSIENT RESPONSE  
MAX4465-69 toc20  
MAX4465-69 toc21  
100  
10  
1
f = 1kHz  
= +10V/V  
BW = 22kHz  
A
V
2V/div  
50mV/div  
R = 10kΩ  
L
0.1  
0.01  
R = 100kΩ  
L
0.001  
20µs/div  
200µs/div  
0
0.05 0.10  
0.15 0.20 0.25 0.30  
(Vp-p)  
V
IN  
5
Low-Cost, Micropower, SC70/SOT23-8, Microphone  
Preamplifiers with Complete Shutdown  
Typical Operating Characteristics (continued)  
(V  
noted.)  
= +5V, V  
= 0V, V  
= V /2, R = 100kto V /2, SHDN = GND (MAX4467/MAX4468 only), T = +25°C, unless otherwise  
CC  
CM  
OUT  
CC  
L
CC  
A
SUPPLY CURRENT  
vs. SUPPLY VOLTAGE  
e
vs. FREQUENCY  
NOISE  
40  
30  
A
= +1V/V  
VCL  
220  
190  
160  
130  
100  
70  
20  
10  
40  
0
100  
1k  
10k  
100k  
1M  
0
1
2
3
4
5
5–MAX469  
FREQUENCY (Hz)  
SUPPLY VOLTAGE (V)  
SINK CURRENT vs. OUTPUT VOLTAGE  
SOURCE CURRENT vs. OUTPUT VOLTAGE  
25  
20  
15  
10  
5
25  
20  
15  
10  
5
V
= +5V  
CC  
V
= +5V  
CC  
V
= +2.4V  
1.5  
V
= +2.4V  
1.5  
CC  
CC  
0
0
0
0.5  
1.0  
2.0  
2.5  
3.0  
0
0.5  
1.0  
2.0  
2.5  
3.0  
OUTPUT VOLTAGE (V)  
OUTPUT VOLTAGE (V)  
Pin Description  
PIN  
NAME  
FUNCTION  
MAX4465  
MAX4466  
MAX4467  
MAX4468  
MAX4469  
4
6 (8)  
OUT  
Amplifier Output  
1
OUTA  
Amplifier Output A  
External Microphone Bias Network Switch  
Output  
1 (4)  
MIC_BIAS  
3
1
2
2 (3)  
3 (2)  
4 (1)  
4
IN-  
IN+  
Inverting Amplifier Input  
Noninverting Amplifier Input  
Ground  
GND  
( ) denotes S0T23 package of the MAX4467/MAX4468  
6
Low-Cost, Micropower, SC70/SOT23-8, Microphone  
Preamplifiers with Complete Shutdown  
Pin Description (continued)  
5–MAX469  
PIN  
NAME  
FUNCTION  
MAX4465  
MAX4466  
MAX4467  
MAX4468  
MAX4469  
Positive Supply. Bypass with a 0.1µF capacitor to  
GND.  
5
7 (7)  
8
V
CC  
2
3
6
5
7
INA-  
INA+  
INB-  
Inverting Amplifier Input A  
Noninverting Amplifier Input A  
Inverting Amplifier Input B  
Noninverting Amplifier Input B  
INB+  
OUTB  
Amplifier Output B  
Active-High Shutdown Input. Connect to GND  
8 (6)  
5 (5)  
SHDN  
N.C.  
for normal operation. Connect to V  
shutdown. Do not leave unconnected.  
for  
CC  
No Connection. Not internally connected.  
( ) denotes SOT23 package of the MAX4467/MAX4468.  
turn off the bias to the microphone when the device is in  
shutdown. This can save several hundred microamps of  
supply current, which can be significant in low power  
applications. The MIC_BIAS pin provides a switched  
Detailed Description  
The MAX4465–MAX4469 are low-power, micropower op  
amps designed to be used as microphone preampli-  
fiers. These preamplifiers are an excellent choice for  
noisy environments because of their high common-  
mode rejection and excellent power-supply rejection  
ratios. They operate from a single +2.4V to +5.5V sup-  
ply.  
version of V  
to the bias components. Figure 3 shows  
CC  
some typical values.  
Driving Capacitive Loads  
Driving a capacitive load can cause instability in many  
op amps, especially those with low quiescent current.  
The MAX4465/MAX4467/MAX4469 are unity-gain stable  
for a range of capacitive loads up to 100pF. Figure 4  
shows the response of the MAX4465 with an excessive  
capacitive load.  
The MAX4465/MAX4467/MAX4469 are unity-gain stable  
and deliver a 200kHz gain bandwidth from only 24µA of  
supply current. The MAX4466/MAX4468 have a mini-  
mum stable gain of +5V/V while providing a 600kHz  
gain bandwidth product.  
The MAX4467/MAX4468 feature a complete shutdown,  
which is active-high, and a shutdown-controlled output  
providing bias to the microphone. The MAX4465/  
MAX4467/MAX4469 feature a slew rate suited to voice  
channel applications. The MAX4466/MAX4468 can be  
used for full-range audio, e.g., PC99 inputs.  
Applications Information  
Shutdown Mode  
The MAX4467 and MAX4468 feature a low-power, com-  
plete shutdown mode. When SHDN goes high, the sup-  
ply current drops to 5nA, the output enters a high  
impedance state and the bias current to the microphone  
is switched off. Pull SHDN low to enable the amplifier.  
Do not leave SHDN unconnected. Figure 5 shows the  
shutdown waveform.  
Rail-to-Rail Output Stage  
The MAX4465–MAX4469 can drive a 10kload and still  
typically swing within 16mV of the supply rails. Figure 1  
shows the output voltage swing of the MAX4465 config-  
Common-Mode Rejection Ratio  
A microphone preamplifier ideally only amplifies the sig-  
nal present on its input and converts it to a voltage  
appearing at the output. When used in noninverting  
mode, there is a small output voltage fluctuation when  
both inputs experience the same voltage change in the  
ured with A = +10.  
V
Switched Bias Supply  
When used as a microphone amplifier for an electret  
microphone, some form of DC bias for the microphone  
is necessary. The MAX4467/MAX4468 have the ability to  
7
Low-Cost, Micropower, SC70/SOT23-8, Microphone  
Preamplifiers with Complete Shutdown  
common mode. The ratio of these voltages is called the  
common-mode gain. The common-mode rejection ratio  
is the ratio of differential-mode gain to common-mode  
gain. The high CMRR properties of the  
MAX4465–MAX4469 provide outstanding performances  
when configured as a noninverting microphone pream-  
plifier.  
Power Supplies and Layout  
The MAX4465–MAX4469 operate from a single +2.4V to  
+5.5V power supply. Bypass the power supply with a  
0.1µF capacitor to ground. Good layout techniques are  
necessary for the MAX4465–MAX4469 family. To  
decrease stray capacitance, minimize trace lengths by  
placing external components close to the op amp’s  
pins. Surface-mount components are recommended. In  
systems where analog and digital grounds are avail-  
able, the MAX4465–MAX4469 should be connected to  
the analog ground.  
Power-Up  
The MAX4465–MAX4469 outputs typically settle within  
1µs after power-up. Figure 6 shows the output voltage  
on power-up.  
Test Circuits/Timing Diagrams  
5–MAX469  
1V/div  
100µs/div  
Figure 1. Rail-to-Rail Output Operation  
+5V  
+5V  
2kΩ  
2kΩ  
V
= +5V  
5
CC  
0.1µF  
MAX4466  
1MΩ  
1MΩ  
IN+  
IN-  
1
3
OUT  
0.01µF  
4
ELECTRET  
CAPSULE  
10kΩ  
1µF  
2
GND  
100kΩ  
100pF  
Figure 2. MAX4466 Typical Application Circuit  
8
Low-Cost, Micropower, SC70/SOT23-8, Microphone  
Preamplifiers with Complete Shutdown  
5–MAX469  
Test Circuits/Timing Diagrams (continued)  
V
CC  
SHDN  
MIC_BIAS  
1k  
100kΩ  
IN+  
IN-  
10µF  
OUT  
2.2k100kΩ  
0.01µF  
MAX4468  
MICROPHONE  
INPUT  
GND  
0.1µF  
200kΩ  
3.5mm SOCKET  
20kΩ  
47pF  
Figure 3. Bias Network Circuit  
R
C
= 10k  
= 10pF  
L
L
C = 2000pF  
L
SHDN  
2V/div  
OUT  
50mV/div  
400µs/div  
40µs/div  
Figure 4. Small-Signal Transient Response with Excessive  
Capacitive Load  
Figure 5. MAX4467/MAX4468 Shutdown Waveform  
9
Low-Cost, Micropower, SC70/SOT23-8, Microphone  
Preamplifiers with Complete Shutdown  
Test Circuits/Timing  
Diagrams (continued)  
Chip Information  
PROCESS: BiCMOS  
Ordering Information (continued)  
PART  
TEMP RANGE  
-40°C to +85°C  
-40°C to +85°C  
-40°C to +85°C  
PIN-PACKAGE  
8 SOT23  
V
CC  
2V/div  
MAX4467EKA+T  
MAX4468EKA+T  
MAX4469EKA+T  
8 SOT23  
8 SOT23  
OUT  
1V/div  
+Denotes a lead(Pb)-free/RoHS-compliant package.  
20µs/div  
5–MAX469  
Figure 6. Power-Up/Power-Down Waveform  
Selector Guide  
EXTERNAL  
MICROPHONE  
SHDN  
MINIMUM STABLE  
GBWP  
(kHz)  
PART  
PIN-PACKAGE  
GAIN  
MAX4465  
MAX4466  
MAX4467  
MAX4468  
MAX4469  
+1  
+5  
+1  
+5  
+1  
No  
No  
200  
600  
200  
600  
200  
5 SC70/5 SOT23  
5 SC70/5 SOT23  
8 SOT23  
Yes  
Yes  
No  
8 SOT23  
8 SOT23  
Pin Configurations (continued)  
+
+
GND  
1
2
3
4
8
7
6
5
OUT  
1
2
3
4
8
7
6
5
V
OUTA  
INA-  
INA+  
GND  
CC  
V
IN+  
IN-  
OUTB  
INB-  
CC  
MAX4467  
MAX4468  
MAX4469  
SHDN  
N.C.  
MIC_BIAS  
INB+  
SOT23  
SOT23  
10  
Low-Cost, Micropower, SC70/SOT23-8, Microphone  
Preamplifiers with Complete Shutdown  
5–MAX469  
Package Information  
For the latest package outline information and land patterns (footprints), go to www.maxim-ic.com/packages. Note that a “+”, “#”, or  
“-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing per-  
tains to the package regardless of RoHS status.  
LAND  
PATTERN NO.  
PACKAGE TYPE  
PACKAGE CODE  
OUTLINE NO.  
90-0174  
SOT23-5  
SC70  
U5+1  
X5+1  
K8+5  
21-0057  
21-0076  
21-0078  
90-0188  
90-0176  
SOT23-8  
11  
Low-Cost, Micropower, SC70/SOT23-8, Microphone  
Preamplifiers with Complete Shutdown  
Revision History  
REVISION  
NUMBER  
REVISION  
DATE  
PAGES  
CHANGED  
DESCRIPTION  
2
6/12  
Added lead-free packaging information, removed SO packaging information  
1, 2, 10  
5–MAX469  
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are  
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. The parametric values (min and max limits) shown in  
the Electrical Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance.  
12 _______________Maxim Integrated Products, Inc. 160 Rio Robles, San Jose, CA 95134 USA 1-408-601-1000  
© 2012 Maxim Integrated Products  
Maxim is a registered trademark of Maxim Integrated Products, Inc.  

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