Low Current Quad Inverting Amplifiers LX509 - DATA SHEET DESCRIPTION FEATURES • 210 µA typical current drain The LX509 consists of 4 independent low noise, low current inverting operational amplifiers utilizing Gennum's low voltage bipolar JFET technology. Each amplifier has a minimum open loop gain of 46 dB with the closed loop gain set by the ratio of a feedback (RF) resistor to the source impedance (RS) . For a well controlled gain tolerance from amplifier to amplifier, it is recommended that the closed loop gain is at least 20 dB below the open loop gain. • 4 inverting opamps; B with 6 dB greater drive current • minimum 46 dB open loop gain • ideal for - active filtering - dual channel hearing aids - mixers Three of the preamplifiers, A, C and D are capable of delivering typically 30 µA of peak current drive while the fourth preamplifier B has 6 dB more current drive capability, allowing a 6 dB greater output into the same load impedance, or the same output level into one half the load impedance. - microphone / telecoil preamps STANDARD PACKAGING • 10 pin PLID® • 10 pin SLT • Chip (61 x 55 mils) Au Bump CIN VB COUT 6 7 8 DOUT DIN 9 10 -C -D -B - A 5 4 BIN BOUT 3 AIN 2 AOUT 1 GND BLOCK DIAGRAM Revision Date: January 2001 Document No. 510 - 30 - 06 GENNUM CORPORATION P.O. Box 489, Stn. A, Burlington, Ontario, Canada L7R 3Y3 tel. +1 (905) 632-2996 Web Site: www.gennum.com E-mail: [email protected] ABSOLUTE MAXIMUM RATINGS PARAMETER PIN CONNECTION VALUE / UNITS Supply Voltage 5V DC Operating Temperature -10 to +40oC Storage Temperature -20o to +70oC B IN o 5 6 C OUT B OUT V A IN B D IN A OUT CAUTION CLASS 1 ESD SENSITIVITY C IN 10 1 GND D OUT ELECTRICAL CHARACTERISTICS VOUT Pin voltage measured with conditions as shown in Test Circuit Positive Current corresponds to current INTO the pin Negative Current corresponds to current OUT of the pin Conditions: Frequency = 1 kHz, Temperature = 25oC, Supply Voltage V = 1.3 VDC B PARAMETER SYMBOL Total Current MIN TYP MAX UNITS ITOT 115 210 305 µA Input Bias Voltage VBIAS 500 570 620 mVDC Input Bias Current IBIAS RF = 1 MΩ -50 0 50 nA VIN = 0.4 VDC' RF = ∞ 200 580 - mVDC 200 280 - mVDC 46 56 - dB - 1 - µVRMS - 1 - % Output Voltage Swing - Hi VOH CONDITIONS IL = -10 µA, (Note 1) Output Voltage Swing - Lo VOL Open Loop Voltage Gain AVOL Input Referred Noise IRN Harmonic Distortion THD IIN = +1 µA' RF = ∞ IL = +10 µA, (Note 2) NFB 0.2 to 10kHz at 12dB/Oct Current Drive A, C, D, - 30 - µA Capability B - 60 - µA All Parameters and Switches remain as shown in Test Circuit unless otherwise stated in "Conditions" Column Notes: 1 VOH = VOUT - VOUT (IL = -10 µA for Blocks A, C, D, IL = -20 µA for Block B) 2 VOL = VOUT - VOUT (IL = +10 µA for Blocks A, C, D, IL = +20 µA for Block B) RF = 0 RS 180 µVRMS at 1kHz 3.92k VIN CS 1.0 a -A to -D b IL = 0 All resistors in ohms, all capacitors in µF unless otherwise stated Fig. 1 LX509 Test Circuit 510 - 30 - 06 VOUT S1 2 8 BASE CURRENT 10 2 3 6 7 4 COMPENSATION 9 5 1 Fig. 2 Functional Schematic RF R12 R1 V1 C11 VO - A R2 V2 V1 R3 V3 C1 C10 R10 C1 - A R2 Fig. 3a Summing Amplifier High Pass C2 R11 R5 RF1 VO - B RIN1 V2 C1 C4 R3 C9 C3 R4 4.7k R2 VO R F2 R9 - C R3 - A V1 Band Pass R1 - B T C5 4.7k RIN2 - C V2 C2 V3 C7 R6 C8 R7 R8 - D Fig. 3b Mixing Circuit C6 R1 Fig. 3d Multi-Band Filtering C4 (for Filter Design refer to Note 600-9, Active Filtering for Hearing Aids) All resistors in ohms, all capacitors in µF unless otherwise stated RF C1 MIC Low Pass - A R2 M C3 VO R3 - B T C2 - C TELE COIL Fig. 3c Mic / Telecoil Preamplifier Fig. 3 LX509 Application Circuits 3 510 - 30 - 06 4 0 -20 RELATIVE OUTPUT (dB) RF = 100k OUTPUT (dBV) -40 RF = 3.3k RF = 47k -60 RF = 10k -80 CS = 0.22µ 0 CS = 0.1µ -4 -8 CS = 0.033µ -12 CS = 0.047µ -16 -100 RF = 22k -20 20 -120 -130 -110 -90 -70 -50 -30 -10 200 Fig. 4 I/O Characteristics for Various RF Values 20k Fig. 5 Closed Loop Frequency Response for Various CS Values 4 60 55 0 50 GAIN (dB) RELATIVE GAIN (dB) 2k FREQUENCY (Hz) INPUT (dBV) -4 -8 45 40 35 -12 30 -16 25 -20 0.6 0.7 0.8 0.9 1.0 1.1 1.2 1.3 1.4 10 SUPPLY VOLTAGE (V) 100 20 1k 10k 100k FREQUENCY (Hz) Fig. 7 Preamplifier Open Loop Frequency Response Fig. 6 Gain vs Supply Voltage RELATIVE TOTAL CURRENT (µA) 40 20 0 -20 -40 -60 -20 -10 0 10 20 30 40 50 TEMPERATURE (oC) Fig.8 Total Current vs Temperature GENNUM CORPORATION DOCUMENT IDENTIFICATION: DATA SHEET The product is in production. Gennum reserves the right to make changes at any time to improve reliability, function or design, in order to provide the best product possible. MAILING ADDRESS: P.O. Box 489, Stn. A, Burlington, Ontario, Canada L7R 3Y3 Tel. +1 (905) 632-2996 Fax +1 (905) 632-2814 SHIPPING ADDRESS: 970 Fraser Drive, Burlington, Ontario, Canada L7L 5P5 REVISION NOTES: GENNUM JAPAN CORPORATION Changes to standard packaging information. C-101, Miyamae Village, 2-10-42 Miyamae, Suginami-ku, Tokyo 168-0081, Japan Tel. +81 (3) 3334-7700 Fax: +81 (3) 3247-8839 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 July 1988 Gennum Corporation. All rights reserved. 510 - 30 - 06 4 Printed in Canada.