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Part: MAX4063EUD
Category:
Analog & Mixed-Signal Processing
Description: MAX4063 Differential Microphone Preamplifier With Internal Bias And Complete Shutdown
Company: Maxim Integrated Products
Datasheet: Download MAX4063EUD datasheet File size : 595 kB
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Datasheet text preview:
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 applicat i o n s . 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. 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. 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 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)
MAX4063
Ordering Information
PART MAX4063ETE* MAX4063EUD TEMP RANGE -40°C to +85°C -40°C to +85°C 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
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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.
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 = +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 = 11.11k, 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 = +25°C.) (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 = +25°C 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 µVRMS % SYMBOL VCC ICC V OCM 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/µs µA mA
VDIFFMAX AV = 2V/V BW-3dB RIN RMATCH en V NRMS THD+N Either differential input
Differential Gain Common-Mode Rejection Ratio Power-Supply Rejection Ratio
AVDIFF CMRR PSRR
VCM = 500mVP-P, f = 1kHz TA = +25°C TA = TMIN - TMAX VCC = 5V ±100mV, f = 1kHz
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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 = +25°C.) (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 V INH VINL tON tOFF 10 10 VIN = 0V or VCC 0.7 VCC 0.3 VCC ±1 µA V V µs µs V OUT ROUT V NRMS 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 µVRMS BW-3dB RIN en V NRMS THD+N PSRR AVAUX f = 1kHz BW = 22Hz to 22kHz f = 1kHz, BW = 22Hz to 22kHz TA = +25°C TA = TMIN - TMAX VOUT = 0.7VRMS 80 72 -19.5 -20 -20.5 230 100 200 620 0.007 100 kHz k nV/Hz µVRMS % dB V/V SYMBOL CONDITIONS MIN TYP MAX UNITS
MAX4063
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.
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