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19-2753; Rev 0; 1/03
Differential Microphone Preamplifier with Internal Bias and Complete Shutdown
General Description
The MAX4063 is a differential-input microphone preamplifier optimized for high-performance, portable applications. The device features two selectable inputs, differential outputs, adjustable gain, an integrated lownoise bias source, and a low-power shutdown mode. Two input paths provide both differential and singleended microphone sensing. The high-noise rejection of the differential input is ideally suited to an internal microphone where system noise and long-run PC board traces can degrade low-level signals. The single-ended input provides a simple connection to an external microphone. The differential and single-ended inputs have independent, adjustable gains that are set with a single external resistor. Differential outputs provide a full-scale signal of up to 6VP-P from a single 3V supply, optimizing the dynamic range of the amplified signal. A complete shutdown mode reduces the supply current to only 0.3A and disables the microphone bias for the ultimate in power savings. The MAX4063 operates from 2.4V to 5.5V and is specified over the extended -40C to +85C operating temperature range. The MAX4063 is available in both 16-pin thin QFN (4mm x 4mm x 0.8mm) and 14-pin TSSOP packages. o o o o o o o o o o o
Features
2.4V to 5.5V Single-Supply Operation Differential Inputs and Outputs Adjustable Gain High 95dB PSRR High 79dB CMRR Low-Noise, Integrated Microphone Bias 750A Supply Current 0.3A Shutdown Current 4kV ESD Protection (AUX_IN) THD+N: 0.05% at 1kHz Available in Space-Saving Packages 14-Pin TSSOP 16-Pin Thin QFN (4mm x 4mm x 0.8mm)
MAX4063
Ordering Information
PART MAX4063ETE* MAX4063EUD TEMP RANGE -40C to +85C -40C to +85C PIN-PACKAGE 16 Thin QFN-EP** 14 TSSOP
Applications
Notebook Audio Systems Tablet PCs PDA Audio Systems Signal Conditioning
*Future product--contact factory for availability. **EP = Exposed paddle.
Typical Operating Circuit
2.4V TO 5.5V 6 VCC
3
Pin Configurations
SHDN
INT/AUX 2 7
12 AUX_IN ADJ
G2 1 INT/AUX SHDN 2 3
14 G1 13 N.C. 12 AUX_IN
MAX4063
5 BIAS VBIAS
OUT 4
OUT 8
OUT 4 BIAS 5 VCC 6 ADJ 7
MAX4063
11 GND 10 IN9 8 IN+ OUT
G1 G2 14 1 RG GND 11 9 IN+ 10 IN-
TSSOP Pin Configurations continued at end of data sheet.
________________________________________________________________ Maxim Integrated Products
1
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Differential Microphone Preamplifier with Internal Bias and Complete Shutdown MAX4063
ABSOLUTE MAXIMUM RATINGS
Supply Voltage (VCC to GND). .................................-0.3V to +6V Any Other Pin to GND ................................-0.3V to (VCC + 0.3V) Duration of Short Circuit to GND or VCC ....................Continuous Continuous Input Current (any pin) ................................ 10mA Continuous Power Dissipation (TA = +70C) 14-Pin TSSOP (derate 9.1mW/C above +70C) ..........667mW 16-Pin Thin QFN (derate 16.9mW/C above +70C) ..1349mW Operating Temperature Range ...........................-40C to +85C Storage Temperature Range .............................-65C to +150C Lead Temperature (soldering, 10s) .................................+300C
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
(VCC = 3V, GND = 0V, SHDN = VCC, INT/AUX = 0V, RG = 11.11k, RL = 100k to 1.5V, RBIAS = , VOUT is measured between OUT and OUT. TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25C.) (Notes 1 and 2)
PARAMETER Supply Voltage Range Supply Current Output Common-Mode Voltage Slew Rate Supply Current in Shutdown Output Short-Circuit Current DIFFERENTIAL INPUT (INT/AUX = 0V) Input Offset Voltage Common-Mode Input Voltage Range Maximum Differential Input Voltage Small-Signal Bandwidth Input Resistance Input Resistance Match Input Noise-Voltage Density RMS Output Noise Voltage Total Harmonic Distortion Plus Noise VOS VCM TA = +25C Inferred from CMRR test 1 1 600 100 1 AV = 20V/V, f = 1kHz AV = 200V/V, f = 1kHz AV = 20V/V, BW = 22Hz to 22kHz AV = 20V/V, f = 1kHz, VOUT = 0.7VRMS, BW = 22Hz to 22kHz 1V < VCM < 2V, VOUT = 0.7VRMS RG = open RG = 11.11k RG = 1.01k 19.2 70 12 225 0.05 2 20 200 70 95 85 86 dB dB 20.8 V/V 1 2 mV V V kHz k % nV/Hz VRMS % SYMBOL VCC ICC VOCM SR I SHDN ISC AV = 20V/V V SHDN = 0V To GND To VCC 1.25 CONDITIONS Inferred from PSRR test MIN 2.4 0.75 1.5 1 0.001 30 30 1 TYP MAX 5.5 1.1 1.75 UNITS V mA V V/s A mA
VDIFFMAX AV = 2V/V BW-3dB RIN RMATCH en VNRMS THD+N Either differential input
Differential Gain Common-Mode Rejection Ratio Power-Supply Rejection Ratio
AVDIFF CMRR PSRR
VCM = 500mVP-P, f = 1kHz TA = +25C TA = TMIN - TMAX VCC = 5V 100mV, f = 1kHz
2
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Differential Microphone Preamplifier with Internal Bias and Complete Shutdown
ELECTRICAL CHARACTERISTICS (continued)
(VCC = 3V, GND = 0V, SHDN = VCC, INT/AUX = 0V, RG = 11.11k, RL = 100k to 1.5V, RBIAS = , VOUT is measured between OUT and OUT. TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25C.) (Notes 1 and 2)
PARAMETER AUXILIARY INPUT (INT/AUX = VCC) Small-Signal Bandwidth Input Resistance Input Noise-Voltage Density RMS Output Noise Voltage Total Harmonic Distortion Plus Noise Power-Supply Rejection Ratio Voltage Gain BIAS OUTPUT Output Voltage Output Resistance Output Noise Voltage Power-Supply Rejection Ratio DIGITAL INPUTS (SHDN and INT/AUX) Input Leakage Current Input Voltage High Input Voltage Low Shutdown Enable Time Shutdown Disable Time IIN VINH VINL tON tOFF 10 10 VIN = 0V or VCC 0.7 VCC 0.3 VCC 1 A V V s s VOUT ROUT VNRMS PSRR IBIAS = 0.5mA to GND IBIAS = 0.5mA to GND IBIAS = 0.5mA to GND, BW = 22Hz to 22kHz IBIAS = 0.5mA to GND, VCC = 2.4V to 5.5V IBIAS = 0.5mA, VCC = 3V + 100mVP-P, f = 1kHz 60 2 2.2 16 20 74 71 dB 30 V VRMS BW-3dB RIN en VNRMS THD+N PSRR AVAUX f = 1kHz BW = 22Hz to 22kHz f = 1kHz, BW = 22Hz to 22kHz TA = +25C TA = TMIN - TMAX VOUT = 0.7VRMS 80 72 -19.5 -20 -20.5 230 100 200 620 0.007 100 kHz k nV/Hz VRMS % dB V/V SYMBOL CONDITIONS MIN TYP MAX UNITS
MAX4063
Note 1: All specifications are 100% tested at TA = +25C. Specification limits over temperature (TA = TMIN to TMAX) are guaranteed by design, not production tested. Note 2: MAX4063 requires a 1F capacitor from BIAS to ground and a 10pF capacitor from ADJ to OUT.
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Differential Microphone Preamplifier with Internal Bias and Complete Shutdown MAX4063
Typical Operating Characteristics
(VCC = 3V, AV = 20V/V, RL 100k to 1.5V, SHDN = VCC, VOUT is measured between OUT and OUT. TA = +25C, unless otherwise noted.)
GAIN vs. FREQUENCY (NO LOAD)
MAX4063 toc01
POWER-SUPPLY REJECTION RATIO vs. FREQUENCY (DIFF INPUT)
MAX4063 toc02
SUPPLY CURRENT vs. TEMPERATURE
VCC = 5V 0.8 SUPPLY CURRENT (mA) VCC = 3V 0.6
MAX4063 toc03
9 6 GAIN (dB)
VCC = 5V AV = 2V/V
0 -20 -40 PSRR (dB) -60 -80 -100 AV = 200V/V -120 AV = 20V/V
1.0
3 0 -3 -6 -9 10 100 1k 10k 100k 1M FREQUENCY (Hz)
0.4
0.2 NO LOAD
-140 10 100 1k 10k 100k 1M FREQUENCY (Hz)
0 -40 -25 -10 5 20 35 50 65 80 TEMPERATURE (C)
SUPPLY CURRENT vs. SUPPLY VOLTAGE
SHUTDOWN SUPPLY CURRENT (nA) 0.8 SUPPLY CURRENT (mA) 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0 NO LOAD 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 0.001 -40
MAX4063 toc04
SHUTDOWN SUPPLY CURRENT vs. TEMPERATURE
MAX4063 toc05
VOH vs. TEMPERATURE
MAX4063 toc06
0.9
100
1000
10
ILOAD = 2.5mA 100 VOH (mV) 10
1
0.1
0.01
ILOAD = 50A
1 -15 10 35 60 85 -40 -15 10 35 60 85 TEMPERATURE (C) TEMPERATURE (C)
SUPPLY VOLTAGE (V)
VOL vs. TEMPERATURE
MAX4063 toc07
VOH vs. LOAD CURRENT
VOH = VCC - VOUT 350 300 VOH (mV) 250 200 150 100 100 50 0 0 1 2 3 4 5 0 VCC = 3V VOL (mV)
MAX4063 toc08
VOL vs. LOAD CURRENT
300 250 200 150 VCC = 3V
MAX4063 toc09
1000
400
350
ILOAD = 2.5mA 100 VOL (mV) 10
ILOAD = 50A 1 -40 -15 10 35 60 85 TEMPERATURE (C)
50 0 LOAD CURRENT (mA)
1
2
3
4
5
LOAD CURRENT (mA)
4
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Differential Microphone Preamplifier with Internal Bias and Complete Shutdown
Typical Operating Characteristics (continued)
(VCC = 3V, AV = 20V/V, RL 100k to 1.5V, SHDN = VCC, VOUT is measured between OUT and OUT. TA = +25C, unless otherwise noted.)
TOTAL HARMONIC DISTORTION PLUS NOISE vs. FREQUENCY (DIFF INPUT)
MAX4063 toc10
MAX4063
TOTAL HARMONIC DISTORTION PLUS NOISE vs. FREQUENCY (AUX INPUT)
MAX4063 toc11
TOTAL HARMONIC DISTORTION PLUS NOISE vs. OUTPUT AMPLITUDE (DIFF INPUT)
BW = 22Hz TO 22kHz
MAX4063 toc12
1 VOUT = 4.5VP-P
1 VOUT = 4.5VP-P
10
3V 0.1 THD+N (%) THD+N (%) 0.1
3V THD+N (%)
1
5V 0.01
5V 0.01
0.1
f = 1kHz
0.01
f = 10kHz
0.001 10 100 1k FREQUENCY (Hz) 10k 100k
0.001 10 100 1k FREQUENCY (Hz) 10k 100k
0.001 0 1 2 3 4 5 6 OUTPUT VOLTAGE (VP-P)
TOTAL HARMONIC DISTORTION PLUS NOISE vs. OUTPUT AMPLITUDE (DIFF INPUT)
MAX4063 toc13
TOTAL HARMONIC DISTORTION PLUS NOISE vs. OUTPUT AMPLITUDE (AUX INPUT)
MAX4063 toc14
TOTAL HARMONIC DISTORTION PLUS NOISE vs. OUTPUT AMPLITUDE (AUX INPUT)
BW = 22Hz TO 22kHz VCC = 5V
MAX4063 toc15
10
BW = 22Hz TO 22kHz VCC = 5V
10
BW = 22Hz TO 22kHz VCC = 5V
10
1 THD+N (%) THD+N (%) f = 1kHz 0.1
1 THD+N (%) f = 1kHz 0.1
1
0.1
f = 1kHz
0.01
f = 10kHz
0.01
f = 10kHz
0.01
f = 10kHz
0.001 0 1 2 3 4 5 6 OUTPUT VOLTAGE (VP-P)
0.001 0 1 2 3 4 5 6 OUTPUT VOLTAGE (VP-P)
0.001 0 1 2 3 4 5 6 OUTPUT VOLTAGE (VP-P)
INPUT-REFERRED NOISE vs. FREQUENCY (DIFF INPUT)
MAX4063 toc16
MIC BIAS OUTPUT NOISE
MAX4063 toc17
SMALL-SIGNAL TRANSIENT RESPONSE FOR DIFF INPUT
MAX4063 toc18
400 INPUT-REFERRED NOISE (nV/Hz) 350 300 250 200 150 100 50 0 10 100 1k FREQUENCY (Hz) 10k
VCC = 5V BW = 22Hz TO 22kHz
DIFF INPUT 5mV/div
20V/div
DIFF OUTPUT 50mV/div
100k
100ms/div
10s/div
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Differential Microphone Preamplifier with Internal Bias and Complete Shutdown MAX4063
Typical Operating Characteristics (continued)
(VCC = 3V, AV = 20V/V, RL 100k to 1.5V, SHDN = VCC, VOUT is measured between OUT and OUT. TA = +25C, unless otherwise noted.) SMALL-SIGNAL TRANSIENT RESPONSE FOR AUX INPUT
MAX4063 toc19
LARGE-SIGNAL TRANSIENT RESPONSE FOR DIFF INPUT
MAX4063 toc20
S/E INPUT 5mV/div
DIFF INPUT 100mV/div
DIFF OUTPUT 100mV/div
DIFF OUTPUT 2V/div
10s/div
10s/div
LARGE-SIGNAL TRANSIENT RESPONSE FOR AUX INPUT
MAX4063 toc21
OUTPUT OVERDRIVEN
MAX4063 toc22
S/E INPUT 100mV/div
DIFF INPUT 500mV/div
DIFF OUTPUT 2V/div
DIFF OUTPUT 2V/div
10s/div
10s/div
6
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Differential Microphone Preamplifier with Internal Bias and Complete Shutdown
Pin Description
PIN TSSOP 1 2 3 4 5 6 7 8 9 10 11 12 13 14 QFN 15 16 1 2 3 4 5 7 9 10 11 12 6, 8, 14 13 NAME G2 INT/AUX SHDN OUT BIAS VCC ADJ OUT IN+ INGND AUX_IN N.C. G1 FUNCTION Gain-Selectable Input. Connect an external resistor between G1 and G2 to set the gain for the differential amplifier (see Adjustable Differential Gain-Setting section). Internal (Differential) or Auxiliary (Single-Ended) Input Select. Drive INT/AUX low to select differential in or high to select auxiliary in. Shutdown Input. Drive SHDN high for normal operation. Drive SHDN low for shutdown mode. Amplifier Output. OUT is high impedance when in shutdown mode. External Electret Microphone Capsule Bias Output. Bypass BIAS with a 1F capacitor to ground. Power Supply. Bypass the VCC to GND with a 0.1F capacitor. Adjustable Gain Select for AUX_IN (see Auxiliary Input-Gain Adjustment section). Connect a 10pF capacitor between OUT and ADJ. Complementary Amplifier Output. OUT is high impedance in shutdown mode. Noninverting Differential Amplifier Input. AC-couple the audio signal into IN+. Inverting Differential Amplifier Input. AC-couple the audio signal into IN-. Ground Single-Ended Input for Auxiliary Microphone. AC-couple the audio signal into AUX_IN. No Connection. Not internally connected. Gain-Selectable Input. Connect an external resistor between G1 and G2 to set the gain for the differential amplifier.
MAX4063
Detailed Description
The MAX4063 is a differential microphone preamplifier providing high-quality amplification, optimized for use in computer and mobile applications. This device features adjustable gain, very high power-supply rejection (95dB), and common-mode rejection (79dB), making it ideal for low-noise applications. The MAX4063 provides a differential input stage, making the device particularly effective when layout constraints force the microphone amplifier to be physically remote from the ECM microphone. The MAX4063 is capable of switching its output between the differential input and an inverting singleended input. INT/AUX selects either the differential input or single-ended auxiliary input. In addition, the MAX4063 has an integrated microphone bias source, simplifying system design and eliminating the need for
external components. The MAX4063 has a complementary output allowing CODECs and other devices with differential inputs to be optimally driven (see Functional Diagram). The MAX4063 includes a 0.3A shutdown mode for ultimate power savings. The differential gain of the MAX4063 is set with a single resistor connected between the G1 and G2 pins. The MAX4063 has an internal default gain of 20V/V on the AUX_IN input. The AUX_IN gain can be increased with a single external resistor (see the Differential-Gain Adjustment and Auxiliary Input-Gain Adjustment sections).
Differential Input
The main microphone amplifier is a low-noise, differential input structure. This is an almost essential element when faced with amplification of low-amplitude analog signals in digitally intense environments such as note-
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Differential Microphone Preamplifier with Internal Bias and Complete Shutdown MAX4063
Functional Diagram
BIAS 2.4V TO 5.5V 6 VCC
MAX4063
12 AUX_IN INT/AUX 2 ADJ 7 14 G1 BIAS RG 1 G2 9 IN+ OUT 8 OUT 4
10 INVCC 3 SHDN SHDN GND 11 VBIAS 5
BIAS
book PCs or PDAs. Used correctly, the advantages over a single-ended solution are: * Better power-supply noise rejection. * Less degradation from noise in PC board ground planes. * The microphone and preamplifier may be placed physically further apart, easing PC board layout restrictions. Differential-Gain Adjustment The MAX4063 allows the user to alter the differential gain to optimize the signal-to-noise ratio (SNR) of their system. The gain is set by a single external resistor (RG) connected between the G1 and G2 pins: RG = 200k A VD - 2
Hence, an 11.11k resistor yields a gain of 20V/V, or 26dB. Leaving the pins unconnected results in a gain of 2V/V. Gain is defined as: For differential out: A VD = VOUT - VOUT VIN+ - VIN-
The resistor can be either fixed or variable, allowing the use of a digitally controlled potentiometer to alter the gain under software control. Auxiliary Input-Gain Adjustment The MAX4063 provides an option to increase the AUX_IN (see Figure 3). To increase the gain, connect resistor RADJ between the ADJ and AUX_IN pins. RADJ is calculated from the following formula: RADJ = 2M (to increase the gain) AVAUX - 20
where AV is the required voltage gain.
8
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Differential Microphone Preamplifier with Internal Bias and Complete Shutdown MAX4063
2.4V TO 5.5V
6 100k VCC RBIAS 5 BIAS CBIAS VBIAS
MAX4063
12 AUX_IN INT/AUX 2 7 ADJ OUT 4
14 G1 1 G2 9 IN+
OUT 8
10 INVCC 3 SHDN SHDN GND 11
Figure 1. MAX4063 with Auxiliary Input Configuration
where: AVAUX = VOUT - VOUT VAUX_IN
RADJ is placed between AUX_IN and ADJ. Input Capacitors The two differential microphone inputs and the singleended auxiliary input of the MAX4063 have on-chip bias components, allowing the user to AC-couple any signals into the input. The input resistance is 100k (typ), so the capacitor size may be chosen accordingly to define the LF rolloff desired. This can be calculated as: CIN = 1 / (2fCUTRIN) This assumes a low source impedance is driving the inputs. A further consideration for the differential input is the effect of these series input capacitors on low-frequency, common-mode rejection. Any mismatch in the values of these two capacitors degrades the CMRR at frequencies where the impedance of the capacitor is significant
compared to the input resistance of the amplifier--this is usually most noticeable at low frequencies. One way to avoid the need for matched or tight tolerance capacitors is to deliberately oversize the values on the differential inputs and to set the lower 3dB point (fCUT) of the amplifier by sizing the output capacitor appropriately. The input impedance matching on the differential input is typically 1%, allowing input capacitor matching to be effective at improving low-frequency PSRR. Common-Mode Rejection Ratio The common-mode rejection ratio (CMRR) refers to the amount of rejection that the amplifier is capable of providing to any signal applied equally to the IN+ and INinputs. In the case of amplifying low-level microphone signals in noisy digital environments, it is a key figure of merit. In audio circuits, this is generally measured for VIN as an AC signal: CMRR(dB) = ADM / ACM where ADM is the differential gain, ACM is the commonmode gain.
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9
Differential Microphone Preamplifier with Internal Bias and Complete Shutdown MAX4063
Input voltages should be sufficiently small such that the output is not clipped in either differential or commonmode application. The topology used in the MAX4063 means that the CMRR actually improves at higher differential gains--another advantage of using differential sensing.
2.4V TO 5.5V 6 VCC MICROPHONE INPUT
MAX4063
12 AUX_IN
INT/AUX 2 7
Auxiliary Input
The auxiliary input is a single-ended input intended to be used with a jack-socket type microphone input (Figure 1). Internal DC-bias components (as on the main inputs) allow the input signal to be AC-coupled. Mechanically switched jack sockets can be used in conjunction with the INT/AUX select pin, allowing the auxiliary microphone input to be automatically selected when a jack socket is inserted.
ADJ 5 BIAS VCC 3 SHDN 9 IN+ SHDN
VBIAS
OUT 4
OUT 8
Microphone Bias Voltage
On the MAX4063 thin QFN package, connect the exposed paddle (backside of PRS) to the ground plane. The MAX4063 has an integrated low-noise, lowoutput impedance bias voltage. An optimum electret bias resistor can be set externally. This gives a lownoise, flexible solution that can run from 2.4V to 5.5V, which is suitable for hand-held devices such as PDAs that typically have audio power supplies in the 3V region (Figure 2).
10 ING1 14 G2 1 GND 11
Figure 2. MAX4063 Used for Biasing a Microphone
Applications Information
Shutdown Mode
The MAX4063 features a low-power, complete shutdown mode. When SHDN goes low, the supply current drops to 0.3A, the output enters a high-impedance state, and the bias current to the microphone is switched off. Driving SHDN high enables the amplifier. SHDN should not be left floating.
Output
DC Bias In shutdown mode, the bias voltage is disabled. OUT and OUT have a low-noise, DC-bias voltage independent of the power supplies, resulting in superior PSRR performance. The MAX4063 outputs are high impedance when the part is in shutdown mode. Differential Output The MAX4063 features a differential output stage (OUT and OUT), allowing optimum performance when connected to ADCs and CODECs with differential inputs. This differential output is particularly useful in designs where the microphone preamplifier is mounted some distance away from the CODEC/ADC, as the low-impedance, differential line provides excellent noise rejection and immunity (Figure 4).
Power Supplies and Layout
The MAX4063 operates from a 2.4V to 5.5V single supply. Bypass the power supply with a 0.1F capacitor to ground. In systems where analog and digital grounds are available, the MAX4063 should be connected to the analog ground.
10
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Differential Microphone Preamplifier with Internal Bias and Complete Shutdown MAX4063
2.4V TO 5.5V 6 VCC RADJ
MAX4063
0.1F
ADJ
7
12 AUX_IN 5 BIAS VBIAS 10pF
2.2k
1F RG 11k
14 G1 OUT 4
1F 2.2k
1 G2 0.1F 9 IN+
OUT 8
INT/AUX 2 10 IN0.1F GND 11 SHDN SHDN 3 VCC
Figure 3. MAX4063 Used to Bias a Microphone Connected to the Auxiliary Input and the Differential Input
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11
Differential Microphone Preamplifier with Internal Bias and Complete Shutdown MAX4063
2.4V TO 5.5V 6 VCC
MAX4063
ADJ 7
VCC
12 AUX_IN 5 BIAS VBIAS 10pF 1F OUT 4 11.1k 2.2F 1 G2 9 IN+ INT/AUX 2 0.1F VCC 10 IN1F ADC
1k
1F
14 G1
1k 0.1F
OUT 8
1k
3
SHDN
SHDN GND 11
2.2F 1k
Figure 4. Using the MAX4063 with Differential Input/Differential Output Configuration
12
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Differential Microphone Preamplifier with Internal Bias and Complete Shutdown
Simplified Block Diagram
2.4V TO 5.5V 6 VCC
MAX4063
MAX4063
12 AUX_IN
INT/AUX 2 ADJ 7
OUT 4 3 SHDN SHDN OUT 8 9 IN+
10 INVBIAS G1 14 1 G2 GND 11
BIAS 5
Chip Information
TRANSISTOR COUNT: 351 PROCESS: BiCMOS
Pin Configurations (continued)
TOP VIEW
INT/AUX N.C.
14
16 SHDN OUT BIAS VCC 1 2 3 4 5
15
G2
13 12 AUX_IN 11 GND
MAX4063
G1
10 IN9 IN+ 8
6
7
THIN QFN
______________________________________________________________________________________
N.C.
OUT
N.C.
ADJ
13
Differential Microphone Preamplifier with Internal Bias and Complete Shutdown MAX4063
Package Information
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information, go to www.maxim-ic.com/packages.)
24L QFN THIN.EPS
PACKAGE OUTLINE 12,16,20,24L QFN THIN, 4x4x0.8 mm
21-0139
A
PACKAGE OUTLINE 12,16,20,24L QFN THIN, 4x4x0.8 mm
21-0139
A
14
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Differential Microphone Preamplifier with Internal Bias and Complete Shutdown
Package Information (continued)
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information, go to www.maxim-ic.com/packages.)
TSSOP4.40mm.EPS
MAX4063
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.
Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 15 (c) 2003 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.

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