Single Stage Inverting Amplifier GS563 - DATA SHEET FEATURES DESCRIPTION • 1.0 to 5 VDC operating range The GS563 is a low noise, low current, inverting amplifier which • low current consumption (54 µA) utilizes Gennum's low voltage bipolar JFET technology. The amplifier has a minimum open loop gain of 45 dB with the closed loop gain set by the ratio of feedback resistor to the input resistor. For a well controlled gain tolerance, it is recommended that the closed loop gain be at least 20 dB below the open loop gain. • 1% electrical distortion • typically 55 dB open loop gain • low pin count (4 pin) • ideal for active filtering The device is internally bias compensated, preventing any DC current flow via external feedback resistors. It is ideally suited for filtering applications and can be used as a drop in replacement for single transistor configurations. STANDARD PACKAGING • 8 pin PLID® • Chip size 27 x 25 mils VCC 7 INPUT 6 3 2 OUTPUT GS563 GND FUNCTIONAL BLOCK DIAGRAM Revision Date: May 1998 Document No. 520 - 67 - 01 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 CONNECTIONS VALUE / UNITS Supply Voltage 5V DC Power Dissipation 25 mW 4 Operating Temperature -10o to +40o C Storage Temperature -20o to +70o C 5 IN OUT GND VCC 1 8 CAUTION CLASS 1 ESD SENSITIVITY ELECTRICAL CHARACTERISTICS Stage = 1.3V Temperature = 25o C PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Amplifier Current IAMP 30 54 80 µA Bias Voltage (Pin 3) VQ3 475 550 675 mV Bias Current (Pin 3) IBIAS See Note 1 -50 0 50 nA S1 = c, S2 = b, S3 = b 200 590 - mV 200 258 - mV 45 55 - dB Output Voltage VOH Swing - High (Pin 3) See Note 2 Output Voltage VOL S1 = b, S2 = b, S3 = c Swing - Low (Pin 3) See Note 3 Open Loop Gain AOL S1 = d, S2 = c, See Note 4 Input Referred Noise I.R.N. Aweight S1 = d, S2 = c - 1.0 2.5 µV Distortion THD S1 = d, S2 = c, VOUT<100 mVRMS - 0.64 1.0 % Supply Rejection PSRR Open Loop 6 11 - dB All switch positions remain as shown in Test Schematic unless otherwise stated. VP is the actual voltage measured on the pin at given condition. V Q - quiescent (unbias) voltage measured on the pad (nothing connected to the pin) Note: 1. IBIAS = (VP3 [S2 = b] - VQ3 ) /1M 2. VOH = VP6 - VQ6 3. VOL = VQ6 - VP6 4. AOL = 20 log (1 + RF / RS) - (20 log ( (RF / RS) (1 / (1 + R1 / R2) ) (VIN / VOUT) - 1) ) VCC 1µF 1.3V A VIN R1 C1 RS d 1k 1.0 3k92 c R2 10 180mVRMS at 1kHz 7 GS563 S1 VOUT 3 b 1µA 6 S3 a 2 + 0.4V DC a b c 680pF V a 10µA b RF = 1M All resistors in ohms, all capacitors in farads unless otherwise stated. 10µA S2 c RF = 392k Fig. 1 GS563 Test Circuit 520 - 67 - 01 2 7 6 BASE CURRENT COMPENSATION 3 2 Fig. 2 Functional Schematic C3 HIGH PASS R2 C1 V1 R3 C4 C2 R1 C7 R11 BAND PASS R6 V2 C5 VO C8 C6 R4 R7 R5 R10 LOW PASS C11 V3 C9 R8 C12 R9 R11 C10 (For Filter Design refer to Note 600-9, Active Filtering for Hearing Aids) All resistors in ohms, all capacitors in farads unless otherwise stated. Fig. 3 Multi-Band Filtering Application 3 520 - 67 - 01 VB 7 GS563 1k0 VOUT 3 6 1µ0 2 VIN 10k All resistors in ohms, all capacitors in farads unless otherwise stated. -10 20 -20 18 -30 16 -40 14 THD (%) OUTPUT (dBV) Fig. 4 Characterization Circuit -50 -60 12 10 8 -70 6 -80 4 -90 2 -100 -140 -120 -100 -80 -60 - 40 0 -20 -90 -80 -70 -60 -50 INPUT (dBV) INPUT (dBV) Fig. 5 Input vs Output Fig. 6 THD vs Input Level -40 -30 60 1 8 IN 50 OUT GAIN (dB) GND 1M VCC 1M 4 40 5 10µ 2k2 10µ VO 8 Pin DIP Pinout (For evaluation purposes) 30 20 10 100 1k 10k 100k FREQUENCY (Hz) Fig. 7 Open Loop Voltage Gain 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. REVISION NOTES: Updated to Data sheet 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 August 1993 Gennum Corporation. All rights reserved. 520 - 67 - 01 4 Printed in Canada.