Linear Class A Preamplifiers LC506/LV506 DATA SHEET DESCRIPTION FEATURES The LC506 and LV506 are class A non-inverting preamplifiers with 40 dB feedback controlled, stabilized gain. • operating supply voltage 1.1 to 1.55 VDC • 40 dB feedback stabilized gain Gain trim is provided at pin 1, which simultaneously affects both gain and output noise, independent of the main volume control. • 38 dB gain trim • 0.95 regulated voltage LC506 A voltage regulator is built on-chip to supply the amplifier and electret microphone with precision reference voltage. A typical regulator voltage for the LC506 is 0.95V, while it is 0.90V for the LV506. This regulator feature of the LC506 allows it to be used with the high power LD549 to provide increased supply rejection during transient drops in supply voltage, caused by high current peaks in the LD549. • 0.90 regulated voltage LV506 STANDARD PACKAGING • 8 pin MICROpac (LC506) Both LC506 and LV 506 devices are capable of operating from a supply voltage of 1.55 VDC while continuously providing 80 dB of regulator supply rejection. • 8 pin MINIpac (LC506) • 8 pin PLID® (LC506) • 6 pin MINIpac (LV506) BLOCK DIAGRAM VB VREG 4(6) 3(3) REGULATOR INPUT + 2(2) 6(8) _ OUTPUT 30K 230 1(1) 5(7) GAIN SET GND Bracketed pin-out for LC506 Revision Date: January 1996 GENNUM CORPORATION P.O. Box 489, Stn A, Burlington, Ontario, Canada L7R 3Y3 Japan Branch: A-302, M i yamae Vi l l age, 2–10–42 M i yamae, Suginami–ku Tokyo 168, Japan Document No. 500 - 26 - 05 tel. (905) 632-2996 fax: (905) 632-5946 tel. (03) 3334-7700 fax (03) 3247-8839 ABSOLUTE MAXIMUM RATINGS PARAMETER PIN CONNECTION VALUE / UNITS Supply Voltage 3 VDC N/C Power Dissipation 60 mW VREG Storage Temperature -20 to + 70˚C Operating Temperature -10 to + 60˚C 5 4 VB PARAMETER VREG 4 3 Gain Set GND I/P 1 8 O/P Gain Set 1 O/P 6 6 PIN 8 PIN Conditions : VB = 1.30 VDC , temperature 25˚C SYMBOL MIN TYP MAX UNITS 38 41 44 dB - 0.03 - dB/˚C 182 300 362 µA - -2.0 - µA/˚C LC506 0.90 0.95 1.00 V LV506 0.85 0.90 0.95 V - 1.2 2.0 µV - 1.5 3.8 % Maximum Output at 7% THD - 350 - mVRMS Input Impedance - 30 - kΩ Output Impedance - 2.5 - kΩ Frequency Response High (-3dB) Low (-3dB) - 5 0.2 - kHz Gain CONDITIONS AV VOUT = 0.25VRMS (Note 1) Temperature Coefficient of Gain Quiescent Current (incl. microphone simulator circuit) Temperature Coefficient of Current Microphone Supply Voltage Input Referred Noise Total Harmonic Distortion and Noise VOUT = 0.25 VRMS - All parameters and switches remain as shown in test circuit unless stated in conditions column. Note 1: AV = 20 log (VOUT/ VIN) + 40 dB where 40 dB is input attenuator VB=1.3 VDC RB=4.7 + 10 4(6) 3(3) REGULATOR 33 K 4.7 K 3.3 K 0.1 + 0.1 2(2) VOUT 6(8) _ 30K VIN 1 kHz 47 10 K 230 1(1) 5(7) + 10 Microphone Simulator Circuit Bracketed pin-out for LC506 All external resistors in ohms, all capacitors in µF unless otherwise stated Fig. 1 Test Circuit 500 - 26 - 05 2 VB GND I/P CAUTION CLASS 1 ESD SENSITIVITY ELECTRICAL CHARACTERISTICS N/C kHz DEVICE CHARACTERISTICS 60 50 GAIN (dB) GAIN (dB) 40 40 20 30 100 1k Frequency (Hz) 0 100 10k Fig. 2 Frequency Response 1k RGT (Ω) Fig.3 Gain vs Gain Trim Resistor 41 GAIN (dB) GAIN (dB) 40 39 38 1.0 1.1 1.2 1.3 1.4 1.5 -20 0 VB (V) 20 40 60 Fig. 5 Gain vs Temperature 450 QUIESCENT CURRENT (µA) 1.2 1.0 0.8 -20 10 TA (o C) Fig. 4 Voltage Gain vs Battery Voltage REGULATING VOLTAGE (V) 10k 0 20 TA (o C) 40 60 350 250 -20 Fig. 6 Regulating Voltage vs Temperature 0 20 TA (o C) 40 60 Fig. 7 Quiescent Current vs Temperature 3 500 - 26 - 05 VB VREG QUIESCENT CURRENT (µA) 450 350 30K OUTPUT 30K 230 250 1.0 1.2 1.1 1.3 1.4 1.5 GROUND VB (V) INPUT GAIN TRIM All resistors in ohms, all capacitors in µF unless otherwise stated Fig. 8 Quiescent Current vs Battery Voltage Fig. 9 Equivalent Circuit VB=1.3 VDC + 6.8 6.8 1 4 6 1 6 LC506 0.01 RVC=10K 4 3 2 MIC 6.8 5 LC/LD549 0.1 2 5 3 7 0.047 470 TYP 8 2.2 N/C RGT 10K All Resistors in ohms, all capacitors in µF unless otherwise stated Note : Use LD549 with LV506 Fig. 10 Typical Application Circuit REVISION NOTES Chip information removed. Gennum Corporation assumes no responsibility for the use of any circuits described herein and makes no representations that they are free from patent infringement. © Copyright Sept. 1982 Gennum Corporation. Revision Date: November 1991 All rights reserved. Printed in Canada. 500 - 26 - 05 4