MAX9812/MAX9813 Tiny, Low-Cost, Single/Dual-Input, Fixed-Gain Microphone Amplifiers with Integrated Bias General Description Features The MAX9812/MAX9813 are single/dual-input, 20dB PC2001 Compliant fixed-gain microphone amplifiers. They offer tiny pack- 100dB at 217Hz Power-Supply Rejection Ratio aging and a low-noise, integrated microphone bias, Very Low 230A Quiescent Current making them ideal for portable audio applications such Low 0.015% THD+N as notebook computers, cell phones, and PDAs. These Available in Two Versions amplifiers feature a 500kHz bandwidth, rail-to-rail out- MAX9812L/MAX9813L2.7V to 3.6V puts, an industry-leading 100dB power-supply rejection MAX9812H/MAX9813H4.5V to 5.5V ratio, and a very low 0.015% THD+N. Power-saving fea- Internal Low-Noise Microphone Bias Supply tures include very low 230A supply current and a total 2.3V for MAX9812L/MAX9813L shutdown mode that cuts the combined supply and 4.0V for MAX9812H/MAX9813H BIAS currents to only 100nA. 100nA Low-Power Shutdown Mode The MAX9812 is a single amplifier in a 6-pin SC70 Rail-to-Rail Outputs package (2mm x 2.1mm) and the MAX9813 is a dual- input amplifier available in an 8-pin SOT23 (3mm x 20dB Fixed Gain 3mm) package. The MAX9813 has two inputs allowing Available in Tiny 6-Pin SC70 (2mm x 2.1mm) and two microphones to be multiplexed to a single output. 8-Pin SOT23 (3mm x 3mm) Packages The MAX9812/MAX9813 are offered in two grades. The Extended Temperature Range -40C to +85C MAX9812L/MAX9813L are optimized for 3.3V supply operation (2.7V to 3.6V). The MAX9812H/MAX9813H are Ordering Information PC2001 compliant and are optimized for 5V operation (4.5V to 5.5V). Both devices are specified over the -40C PIN- to +85C extended operating temperature range. PART TEMP RANGE PACKAGE V (V) CC MAX9812LEXT+T -40C to +85C 6 SC70 2.7 to 3.6 Applications MAX9812HEXT+T -40C to +85C 6 SC70 4.5 to 5.5 Notebook Computers MAX9813LEKA+T -40C to +85C 8 SOT23 2.7 to 3.6 PDAs MAX9813HEKA+T -40C to +85C 8 SOT23 4.5 to 5.5 Smart Phones +Denotes a lead(Pb)-free/RoHS-compliant package. Digital Cameras Pin Configurations, Selector Guide, and Typical Operating Video Tape Recorders Circuits appear at end of data sheet. Simplified Block Diagrams V V CC CC SHDN SHDN REFERENCE REFERENCE BIAS BIAS 2.3V (L VERSION) 2.3V (L VERSION) 4.0V (H VERSION) 4.0V (H VERSION) IN1 IN OUT OUT 20dB 20dB IN2 IN1/IN2 MAX9812 MAX9813 GND GND For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxims website at www.maximintegrated.com. 19-2840 Rev 3 4/14MAX9812/MAX9813 Tiny, Low-Cost, Single/Dual-Input, Fixed-Gain Microphone Amplifiers with Integrated Bias ABSOLUTE MAXIMUM RATINGS (All voltages referenced to GND.) Operating Temperature Range ...........................-40C to +85C V ........................................................................-0.3V to +6.0V Storage Temperature Range .............................-65C to +150C CC All Other Pins..............................................-0.3V to (V + 0.3V) Junction Temperature......................................................+150C CC Continuous Current (IN, SHDN, IN1, IN2, IN1/IN2)...........20mA Lead Temperature (soldering, 10s) .................................+300C OUT, BIAS Short-Circuit Duration (to GND or V ) ...Continuous Soldering Temperature (reflow) .......................................+260C CC Continuous Power Dissipation (T = +70C) A SC70 (derate 3.1mW/C above +70C) .......................245mW SOT23 (derate 8.9mw/C above +70C) .....................714mW 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 = 3.3V, I = 500A (MAX9812L/MAX9813L), V = 5V, I = 800A (MAX9812H/MAX9813H), V = 0V, R = open, GND CC BIAS CC BIAS L SHDN = V , T = T to T , unless otherwise noted. Typical values are at T = +25C.) (Note 1) CC A MIN MAX A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS GENERAL MAX9812L/MAX9813L 2.7 3.6 Inferred from Supply Voltage Range V V CC PSRR test MAX9812H/MAX9813H 4.5 5.5 Supply Current I I = 0A 230 400 A CC BIAS Shutdown Supply Current I SHDN = GND 0.1 1 A CC SHDN MAX9812L/MAX9813L 1.35 1.5 1.65 Amplifier Output Bias Voltage V V OUT DC MAX9812H/MAX9813H 2.25 2.5 2.75 Input Resistance R 85 k IN Voltage Gain A 19 20 21 dB V DC 90 100 f = 217Hz 100 Power-Supply Rejection Ratio PSRR Input referred, T = +25C dB OUT A f = 1kHz 100 f = 10kHz 90 V - CC R = 10k to V /2 L CC 0.1 V OH V - V - CC CC Output Voltage Swing R = 1k to V /2 V L CC 0.25V 0.1V R = 10k to V /2 0.1 L CC V OL R = 1k to V /2 0.1 0.25 L CC Output Short-Circuit Current I Sinking or sourcing 3 12 24 mA OUT SC Small-Signal -3dB Bandwidth BW V = 10mV 400 kHz OUT P-P Output Capacitive-Load Stability C No sustained oscillations 50 pF L Output Impedance Z f = 1kHz 0.5 OUT Output Slew Rate SR V = 1V step 1 V/s OUT Maxim Integrated 2