19-2753; Rev 0; 1/03 Differential Microphone Preamplifier with Internal Bias and Complete Shutdown The MAX4063 operates from 2.4V to 5.5V and is specified over the extended -40°C to +85°C operating temperature range. The MAX4063 is available in both 16-pin thin QFN (4mm x 4mm x 0.8mm) and 14-pin TSSOP packages. Applications Notebook Audio Systems Tablet PCs 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 750µA Supply Current 0.3µA 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) Ordering Information TEMP RANGE PIN-PACKAGE MAX4063ETE* PART -40°C to +85°C 16 Thin QFN-EP** MAX4063EUD -40°C to +85°C 14 TSSOP *Future product—contact factory for availability. **EP = Exposed paddle. Typical Operating Circuit 2.4V TO 5.5V PDA Audio Systems Signal Conditioning 3 Pin Configurations 6 VCC SHDN INT/AUX 2 12 AUX_IN ADJ 14 G1 G2 1 INT/AUX 2 13 N.C. SHDN 3 12 AUX_IN OUT 4 MAX4063 BIAS 5 MAX4063 5 BIAS 7 OUT 4 VBIAS OUT 8 11 GND 10 IN- VCC 6 9 IN+ ADJ 7 8 OUT 9 IN+ 10 ING1 G2 14 1 TSSOP GND 11 RG Pin Configurations continued at end of data sheet. ________________________________________________________________ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. 1 MAX4063 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 0.3µA and disables the microphone bias for the ultimate in power savings. MAX4063 Differential Microphone Preamplifier with Internal Bias and Complete Shutdown 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 = +70°C) 14-Pin TSSOP (derate 9.1mW/°C above +70°C) ..........667mW 16-Pin Thin QFN (derate 16.9mW/°C above +70°C) ..1349mW Operating Temperature Range ...........................-40°C to +85°C Storage Temperature Range .............................-65°C to +150°C Lead Temperature (soldering, 10s) .................................+300°C 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 = 11.11kΩ, RL = 100kΩ to 1.5V, RBIAS = ∞, VOUT is measured between OUT and OUT. TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Notes 1 and 2) PARAMETER SYMBOL Supply Voltage Range VCC Supply Current CONDITIONS Inferred from PSRR test MIN ICC Output Common-Mode Voltage VOCM TYP MAX UNITS 5.5 V 0.75 1.1 mA 1.5 1.75 2.4 1.25 SR AV = 20V/V ±1 Supply Current in Shutdown I SHDN V SHDN = 0V 0.001 Output Short-Circuit Current ISC Slew Rate To GND 30 To VCC 30 V V/µs 1 µA mA DIFFERENTIAL INPUT (INT/AUX = 0V) ±1 Input Offset Voltage VOS TA = +25°C Common-Mode Input Voltage Range VCM Inferred from CMRR test Maximum Differential Input Voltage Small-Signal Bandwidth Input Resistance Input Resistance Match VDIFFMAX AV = 2V/V BW-3dB RIN mV 2 V 1 V 600 kHz 100 kΩ 1 % AV = 20V/V, f = 1kHz 70 AV = 200V/V, f = 1kHz 12 VNRMS AV = 20V/V, BW = 22Hz to 22kHz 225 µVRMS THD+N AV = 20V/V, f = 1kHz, VOUT = 0.7VRMS, BW = 22Hz to 22kHz 0.05 % AVDIFF 1V < VCM < 2V, VOUT = 0.7VRMS en RMS Output Noise Voltage Total Harmonic Distortion Plus Noise Common-Mode Rejection Ratio CMRR Power-Supply Rejection Ratio PSRR 2 Either differential input RMATCH Input Noise-Voltage Density Differential Gain 1 RG = open RG = 11.11kΩ RG = 1.01kΩ nV/√Hz 2 19.2 20 20.8 V/V 200 VCM = 500mVP-P, f = 1kHz 70 TA = +25°C 95 TA = TMIN - TMAX 85 VCC = 5V ±100mV, f = 1kHz 86 _______________________________________________________________________________________ dB dB Differential Microphone Preamplifier with Internal Bias and Complete Shutdown (VCC = 3V, GND = 0V, SHDN = VCC, INT/AUX = 0V, RG = 11.11kΩ, RL = 100kΩ to 1.5V, RBIAS = ∞, VOUT is measured between OUT and OUT. TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Notes 1 and 2) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS AUXILIARY INPUT (INT/AUX = VCC) Small-Signal Bandwidth BW-3dB Input Resistance RIN Input Noise-Voltage Density en RMS Output Noise Voltage VNRMS Total Harmonic Distortion Plus Noise THD+N 230 kHz 100 kΩ f = 1kHz 200 nV/√Hz BW = 22Hz to 22kHz 620 µVRMS 0.007 % f = 1kHz, BW = 22Hz to 22kHz TA = +25°C 80 100 TA = TMIN - TMAX 72 -19.5 -20 2 2.2 Power-Supply Rejection Ratio PSRR Voltage Gain AVAUX VOUT = 0.7VRMS VOUT IBIAS = 0.5mA to GND ROUT IBIAS = 0.5mA to GND 16 IBIAS = 0.5mA to GND, BW = 22Hz to 22kHz 20 dB -20.5 V/V BIAS OUTPUT Output Voltage Output Resistance Output Noise Voltage VNRMS IBIAS = 0.5mA to GND, VCC = 2.4V to 5.5V Power-Supply Rejection Ratio PSRR 60 IBIAS = 0.5mA, VCC = 3V + 100mVP-P, f = 1kHz V 30 Ω µVRMS 74 dB 71 DIGITAL INPUTS (SHDN and INT/AUX) Input Leakage Current IIN ±1 VIN = 0V or VCC 0.7 ✕ VCC µA Input Voltage High VINH Input Voltage Low VINL V Shutdown Enable Time tON 10 µs Shutdown Disable Time tOFF 10 µs 0.3 ✕ VCC V Note 1: All specifications are 100% tested at TA = +25°C. Specification limits over temperature (TA = TMIN to TMAX) are guaranteed by design, not production tested. Note 2: MAX4063 requires a 1µF capacitor from BIAS to ground and a 10pF capacitor from ADJ to OUT. _______________________________________________________________________________________ 3 MAX4063 ELECTRICAL CHARACTERISTICS (continued) Typical Operating Characteristics (VCC = 3V, AV = 20V/V, RL ≥ 100kΩ to 1.5V, SHDN = VCC, VOUT is measured between OUT and OUT. TA = +25°C, unless otherwise noted.) PSRR (dB) 0 AV = 20V/V -80 -3 -100 -6 -120 -9 -140 AV = 200V/V VCC = 3V 0.6 0.4 0.2 NO LOAD 100 1k 10k 100k 1M 0 10 100 1k 10k 100k FREQUENCY (Hz) FREQUENCY (Hz) SUPPLY CURRENT vs. SUPPLY VOLTAGE SHUTDOWN SUPPLY CURRENT vs. TEMPERATURE 0.7 0.6 0.5 0.4 0.3 0.2 20 35 50 65 80 VOH vs. TEMPERATURE 100 1000 10 ILOAD = 2.5mA 100 1 VOH (mV) 0.8 5 TEMPERATURE (°C) MAX4063 toc05 MAX4063 toc04 0.9 -40 -25 -10 1M MAX4063 toc06 10 SUPPLY CURRENT (mA) -60 SHUTDOWN SUPPLY CURRENT (nA) GAIN (dB) -40 3 VCC = 5V 0.8 SUPPLY CURRENT (mA) -20 6 1.0 MAX4063 toc02 VCC = 5V AV = 2V/V SUPPLY CURRENT vs. TEMPERATURE 0 MAX4063 toc01 9 POWER-SUPPLY REJECTION RATIO vs. FREQUENCY (DIFF INPUT) MAX4063 toc03 GAIN vs. FREQUENCY (NO LOAD) 0.1 10 ILOAD = 50µA 0.01 0.1 NO LOAD 0.001 2.5 3.0 3.5 4.0 4.5 5.0 1 -40 5.5 -15 10 35 60 85 -15 MAX4063 toc07 400 ILOAD = 2.5mA 60 85 350 VOH = VCC - VOUT 300 VCC = 3V 250 250 VOL (mV) VOH (mV) 100 35 VOL vs. LOAD CURRENT 350 300 10 TEMPERATURE (°C) VOH vs. LOAD CURRENT VOL vs. TEMPERATURE 1000 200 VCC = 3V 200 150 150 10 100 100 50 50 ILOAD = 50µA 0 0 1 -40 -15 10 35 TEMPERATURE (°C) 4 -40 TEMPERATURE (°C) SUPPLY VOLTAGE (V) MAX4063 toc09 2.0 MAX4063 toc08 0 VOL (mV) MAX4063 Differential Microphone Preamplifier with Internal Bias and Complete Shutdown 60 85 0 1 2 3 LOAD CURRENT (mA) 4 5 0 1 2 3 LOAD CURRENT (mA) _______________________________________________________________________________________ 4 5 Differential Microphone Preamplifier with Internal Bias and Complete Shutdown 10 MAX4063 toc11 VOUT = 4.5VP-P TOTAL HARMONIC DISTORTION PLUS NOISE vs. OUTPUT AMPLITUDE (DIFF INPUT) 1 MAX4063 toc10 1 TOTAL HARMONIC DISTORTION PLUS NOISE vs. FREQUENCY (AUX INPUT) VOUT = 4.5VP-P BW = 22Hz TO 22kHz 1 3V 3V 0.1 MAX4063 toc12 TOTAL HARMONIC DISTORTION PLUS NOISE vs. FREQUENCY (DIFF INPUT) 5V THD+N (%) THD+N (%) THD+N (%) 0.1 0.01 5V f = 1kHz 0.1 0.01 0.01 0.001 100 1k 10k 0.001 100k 10 100 FREQUENCY (Hz) TOTAL HARMONIC DISTORTION PLUS NOISE vs. OUTPUT AMPLITUDE (DIFF INPUT) BW = 22Hz TO 22kHz VCC = 5V THD+N (%) 0.1 0.01 0.001 1 2 3 4 5 6 3 4 5 6 TOTAL HARMONIC DISTORTION PLUS NOISE vs. OUTPUT AMPLITUDE (AUX INPUT) BW = 22Hz TO 22kHz VCC = 5V 10 BW = 22Hz TO 22kHz VCC = 5V 1 f = 1kHz 0.1 f = 10kHz 0.001 0 2 TOTAL HARMONIC DISTORTION PLUS NOISE vs. OUTPUT AMPLITUDE (AUX INPUT) 0.01 f = 10kHz 1 OUTPUT VOLTAGE (VP-P) 1 f = 1kHz THD+N (%) 0 100k THD+N (%) 1 10k FREQUENCY (Hz) 10 MAX4063 toc13 10 1k MAX4063 toc14 10 f = 10kHz MAX4063 toc15 0.001 0.1 f = 1kHz 0.01 f = 10kHz 0.001 0 1 2 3 4 5 6 0 1 2 3 4 5 6 OUTPUT VOLTAGE (VP-P) OUTPUT VOLTAGE (VP-P) OUTPUT VOLTAGE (VP-P) INPUT-REFERRED NOISE vs. FREQUENCY (DIFF INPUT) MIC BIAS OUTPUT NOISE SMALL-SIGNAL TRANSIENT RESPONSE FOR DIFF INPUT MAX4063 toc16 400 INPUT-REFERRED NOISE (nV/√Hz) MAX4063 Typical Operating Characteristics (continued) (VCC = 3V, AV = 20V/V, RL ≥ 100kΩ to 1.5V, SHDN = VCC, VOUT is measured between OUT and OUT. TA = +25°C, unless otherwise noted.) 350 MAX4063 toc18 MAX4063 toc17 VCC = 5V BW = 22Hz TO 22kHz DIFF INPUT 5mV/div 300 250 200 20µV/div DIFF OUTPUT 50mV/div 150 100 50 0 10 100 1k 10k 100k 100ms/div 10µs/div FREQUENCY (Hz) _______________________________________________________________________________________ 5 MAX4063 Differential Microphone Preamplifier with Internal Bias and Complete Shutdown Typical Operating Characteristics (continued) (VCC = 3V, AV = 20V/V, RL ≥ 100kΩ to 1.5V, SHDN = VCC, VOUT is measured between OUT and OUT. TA = +25°C, unless otherwise noted.) LARGE-SIGNAL TRANSIENT RESPONSE FOR DIFF INPUT SMALL-SIGNAL TRANSIENT RESPONSE FOR AUX INPUT MAX4063 toc20 MAX4063 toc19 DIFF INPUT 100mV/div S/E INPUT 5mV/div DIFF OUTPUT 2V/div DIFF OUTPUT 100mV/div 10µs/div 10µs/div LARGE-SIGNAL TRANSIENT RESPONSE FOR AUX INPUT OUTPUT OVERDRIVEN MAX4063 toc22 MAX4063 toc21 S/E INPUT 100mV/div DIFF INPUT 500mV/div DIFF OUTPUT 2V/div DIFF OUTPUT 2V/div 10µs/div 6 10µs/div _______________________________________________________________________________________ Differential Microphone Preamplifier with Internal Bias and Complete Shutdown PIN NAME FUNCTION TSSOP QFN 1 15 G2 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). 2 16 INT/AUX Internal (Differential) or Auxiliary (Single-Ended) Input Select. Drive INT/AUX low to select differential in or high to select auxiliary in. 3 1 SHDN 4 2 OUT Amplifier Output. OUT is high impedance when in shutdown mode. 5 3 BIAS External Electret Microphone Capsule Bias Output. Bypass BIAS with a 1µF capacitor to ground. 6 4 VCC Power Supply. Bypass the VCC to GND with a 0.1µF capacitor. 7 5 ADJ Adjustable Gain Select for AUX_IN (see Auxiliary Input-Gain Adjustment section). Connect a 10pF capacitor between OUT and ADJ. 8 7 OUT Complementary Amplifier Output. OUT is high impedance in shutdown mode. Shutdown Input. Drive SHDN high for normal operation. Drive SHDN low for shutdown mode. 9 9 IN+ Noninverting Differential Amplifier Input. AC-couple the audio signal into IN+. 10 10 IN- Inverting Differential Amplifier Input. AC-couple the audio signal into IN-. 11 11 GND 12 12 AUX_IN 13 6, 8, 14 N.C. 14 13 G1 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. 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 0.3µA 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- _______________________________________________________________________________________ 7 MAX4063 Pin Description Differential Microphone Preamplifier with Internal Bias and Complete Shutdown MAX4063 Functional Diagram 2.4V TO 5.5V BIAS 6 VCC MAX4063 12 AUX_IN INT/AUX 2 ADJ 7 14 G1 OUT 4 BIAS RG 1 G2 OUT 8 9 IN+ 10 IN- BIAS VCC 5 VBIAS 3 SHDN SHDN GND 11 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 = 200kΩ A VD − 2 where AV is the required voltage gain. 8 Hence, an 11.11kΩ 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 = 2MΩ (to increase the gain) AVAUX − 20 _______________________________________________________________________________________ Differential Microphone Preamplifier with Internal Bias and Complete Shutdown MAX4063 2.4V TO 5.5V 6 100kΩ VCC RBIAS 5 BIAS VBIAS CBIAS MAX4063 12 AUX_IN INT/AUX 2 7 ADJ 14 G1 OUT 4 1 G2 OUT 8 9 IN+ 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 100kΩ (typ), so the capacitor size may be chosen accordingly to define the LF rolloff desired. This can be calculated as: CIN = 1 / (2πfCUTRIN) 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. _______________________________________________________________________________________ 9 MAX4063 Differential Microphone Preamplifier with Internal Bias and Complete Shutdown 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. 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. 2.4V TO 5.5V 6 VCC MAX4063 MICROPHONE INPUT INT/AUX 2 12 AUX_IN ADJ 5 BIAS VBIAS 7 OUT 4 VCC 3 SHDN OUT 8 SHDN 9 IN+ 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). 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). 10 10 ING1 G2 14 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 0.3µA, 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. Power Supplies and Layout The MAX4063 operates from a 2.4V to 5.5V single supply. Bypass the power supply with a 0.1µF capacitor to ground. In systems where analog and digital grounds are available, the MAX4063 should be connected to the analog ground. ______________________________________________________________________________________ Differential Microphone Preamplifier with Internal Bias and Complete Shutdown MAX4063 2.4V TO 5.5V 6 VCC RADJ MAX4063 0.1µF ADJ 7 12 AUX_IN 5 2.2kΩ 1µF BIAS 10pF VBIAS 14 G1 OUT 4 1µF RG 11kΩ 1 G2 2.2kΩ 0.1µF OUT 8 9 IN+ INT/AUX 2 VCC 10 INSHDN 0.1µF SHDN 3 GND 11 Figure 3. MAX4063 Used to Bias a Microphone Connected to the Auxiliary Input and the Differential Input ______________________________________________________________________________________ 11 MAX4063 Differential Microphone Preamplifier with Internal Bias and Complete Shutdown 2.4V TO 5.5V 6 VCC MAX4063 VCC 12 AUX_IN 5 1kΩ ADJ 7 1µF BIAS 10pF VBIAS 14 G1 1µF OUT 4 11.1kΩ 2.2µF 1 G2 1kΩ 0.1µF OUT 8 ADC 1µF 9 IN+ INT/AUX 2 0.1µF 10 INVCC 1kΩ 3 SHDN SHDN GND 2.2µF 11 1kΩ Figure 4. Using the MAX4063 with Differential Input/Differential Output Configuration 12 ______________________________________________________________________________________ Differential Microphone Preamplifier with Internal Bias and Complete Shutdown 2.4V TO 5.5V 6 VCC MAX4063 12 AUX_IN INT/AUX 2 ADJ 7 OUT 4 3 SHDN SHDN OUT 8 9 IN+ 10 INVBIAS Pin Configurations (continued) OUT 2 BIAS 3 VCC 4 N.C. G1 15 14 13 12 AUX_IN 11 GND MAX4063 10 IN9 ADJ 5 6 7 8 N.C. 1 16 OUT SHDN G2 TOP VIEW N.C. Chip Information TRANSISTOR COUNT: 351 PROCESS: BiCMOS G2 GND 11 1 INT/AUX G1 14 BIAS 5 IN+ THIN QFN ______________________________________________________________________________________ 13 MAX4063 Simplified Block Diagram 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 MAX4063 Differential Microphone Preamplifier with Internal Bias and Complete Shutdown 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 14 A ______________________________________________________________________________________ Differential Microphone Preamplifier with Internal Bias and Complete Shutdown TSSOP4.40mm.EPS 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 © 2003 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products. MAX4063 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.)