MAX4063 19-2753 Rev 1 6/11 Differential Microphone Preamplifier with Internal Bias and Complete Shutdown General Description Features The MAX4063 is a differential-input microphone preampli- 2.4V to 5.5V Single-Supply Operation fier optimized for high-performance, portable applica- Differential Inputs and Outputs tions. The device features two selectable inputs, Adjustable Gain differential outputs, adjustable gain, an integrated low- High 95dB PSRR noise bias source, and a low-power shutdown mode. Two input paths provide both differential and single- High 79dB CMRR ended microphone sensing. The high-noise rejection of Low-Noise, Integrated Microphone Bias the differential input is ideally suited to an internal micro- 750A Supply Current phone where system noise and long-run PC board traces 0.3A Shutdown Current can degrade low-level signals. The single-ended input 4kV ESD Protection (AUX IN) provides a simple connection to an external microphone. THD+N: 0.05% at 1kHz The differential and single-ended inputs have indepen- dent, adjustable gains that are set with a single external Available in Space-Saving Packages resistor. Differential outputs provide a full-scale signal of 14-Pin TSSOP up to 6V from a single 3V supply, optimizing the P-P 16-Pin TQFN (4mm x 4mm x 0.8mm) dynamic range of the amplified signal. A complete shut- down mode reduces the supply current to only 0.3A and disables the microphone bias for the ultimate in Ordering Information power savings. PART TEMP RANGE PIN-PACKAGE The MAX4063 operates from 2.4V to 5.5V and is specified over the extended -40C to +85C operating temperature MAX4063ETE+ -40C to +85C 16 TQFN-EP* range. The MAX4063 is available in both 16-pin TQFN MAX4063EUD+ -40C to +85C 14 TSSOP (4mm x 4mm x 0.8mm) and 14-pin TSSOP packages. *EP = Exposed pad. +Denotes a lead(pB)-free/RoHS-compliant package. Applications Notebook Audio Systems Typical Operating Circuit Tablet PCs 2.4V TO 5.5V PDA Audio Systems Signal Conditioning 6 V CC 3 2 INT/AUX SHDN Pin Configurations 12 AUX IN 7 ADJ + MAX4063 OUT 4 G2 1 14 G1 5 BIAS V INT/AUX 2 13 N.C. BIAS OUT 8 SHDN 3 12 AUX IN OUT 4 MAX4063 11 GND 9 IN+ BIAS 5 10 IN- V 6 9 IN+ CC 10 IN- ADJ 7 8 OUT G1 G2 GND 14 1 11 TSSOP R G Pin Configurations continued at end of data sheet. Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct at 1-888-629-4642, or visit Maxims website at www.maxim-ic.com.Differential Microphone Preamplifier with Internal Bias and Complete Shutdown ABSOLUTE MAXIMUM RATINGS Supply Voltage (V to GND)................................-0.3V to +6V 16-Pin TQFN (derate 25.0mW/C above +70C) ........2000mW CC Any Other Pin to GND ................................-0.3V to (V + 0.3V) Operating Temperature Range ...........................-40C to +85C CC Duration of Short Circuit to GND or V ....................Continuous Storage Temperature Range .............................-65C to +150C CC Continuous Input Current (any pin) ................................ 10mA Lead Temperature (soldering, 10s) .................................+300C Continuous Power Dissipation (T = +70C) Soldering Temperature (reflow) .......................................+260C A 14-Pin TSSOP (derate 10.0mW/C above +70C) .....796.8mW 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 = 3V, V = 0V, V = V V = 0V, R = 11.11k, R = 100k to 1.5V, R = , V is measured between GND SHDN INT/AUX CC CC, G L BIAS OUT OUT and OUT. T = T to T , unless otherwise noted. Typical values are at T = +25C.) (Notes 1 and 2) A MIN MAX A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Supply Voltage Range V Inferred from PSRR test 2.4 5.5 V CC Supply Current I 0.75 1.1 mA CC Output Common-Mode Voltage V 1.25 1.5 1.75 V OCM Slew Rate SR A = 20V/V 1 V/s V Supply Current in Shutdown I V = 0V 0.001 1 A SHDN SHDN To GND 30 Output Short-Circuit Current I mA SC To V 30 CC DIFFERENTIAL INPUT (V = 0V) INT/AUX Input Offset Voltage V T = +25C 1mV OS A Common-Mode Input Voltage Range V Inferred from CMRR test 1 2 V CM Maximum Differential Input Voltage V A = 2V/V 1 V DIFFMAX V Small-Signal Bandwidth BW 600 kHz -3dB Input Resistance R Either differential input 100 k IN Input Resistance Match R 1% MATCH A = 20V/V, f = 1kHz 70 V Input Noise-Voltage Density e nV/Hz n A = 200V/V, f = 1kHz 12 V RMS Output Noise Voltage V A = 20V/V, BW = 22Hz to 22kHz 225 V NRMS V RMS A = 20V/V, f = 1kHz, V = 0.7V , V OUT RMS Total Harmonic Distortion Plus Noise THD+N 0.05 % BW = 22Hz to 22kHz R = open 2 G 1V < V < 2V, CM Differential Gain A R = 11.11k 19.2 20 20.8 V/V VDIFF G V = 0.7V OUT RMS R = 1.01k 200 G Common-Mode Rejection Ratio CMRR V = 500mV , f = 1kHz 70 dB CM P-P T = +25C 95 A Power-Supply Rejection Ratio PSRR T = T - T 85 dB A MIN MAX V = 5V 100mV, f = 1kHz 86 CC 2 MAX4063