GS3019 Hybrid with LS509 Amplifier GS3019 - HYB DATA SHEET FEATURES This hybrid is very similar to Gennum's 3010 with the exception that capacitors C2 and C3 on the GS3019 have been increased in value to extend the frequency response of the system. C2 and the output impedance of the microphone form a high pass filter with a corner frequency of approximately 180 Hz. The hybrid allows for easy adjustment of this corner frequency via the addition of components to its many additional solder pads. Likewise, R3 and C3 form a high pass filter with a corner frequency of 130 Hz. Altering this frequency is easily accomplished by adding additional capacitance between pads 12 and 2 on the hybrid. • Gennum’s LS509 3 stage amplifier • independent preamp can be used as telecoil preamplifier • four “must use” capacitors mounted on hybrid • choice of 5 settings for optimal transducer current • easy assembly and high reliability STANDARD PACKAGING • Hybrid Typical Dimensions 0.276 in x 0.101 in x 0.094 in (7.01 mm x 2.57 mm x 2.39 mm) Stage C of the LS509 is a class A current drive output. There is a fixed reference voltage of typically 29 mV at pin 2 of the chip (pad 5 of the hybrid). The current that flows in the receiver is the ratio of this 29 mV reference voltage to the resistance seen from pin 2 to ground. R1 and R2 have been included on the GS3019 to allow for easy adjustment of the current for the most commonly used receivers. DESCRIPTION The hybrid consists of Gennum's LS509 class A amplifier, four capacitors, and two selectable bias resistors. This hybrid is very similar to Gennum's 3010 with the exception that capacitors C2 and C3 on the GS3019 have been increased in value to extend the frequency response of the system. The system also has the capability of MPO (Maximum Power Output) control. This is provided by the Schottky diodes on the LS509 die. To make use of the diodes in the system, a potentiometer must be added from pads 7 to 9 on the hybrid. VB 8 GS3019 VCC 8 4k VMIC 15 7 C1 4µ7 C4 9 7 MPO 0µ1 21k C2 IN 16 220n 6 -A -B -C 9 OUT 10 2 RE 125 LS509 - DIE 5 3 4 1 MGND 1 R2 98 R1 58 C3 220n R3 5k6 14 A IN 3 12 2 A OUT A OUTR B INC 13 B IN 4 B OUT 6 GND 17 GND1 11 18 10 R1 GND2 R2 5 R3 All resistors in ohms, all capacitors in farads unless otherwise stated. FUNCTIONAL BLOCK DIAGRAM Revision Date: May 1998 Document No. 521 - 04 - 02 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 PAD CONNECTION PARAMETER VALUE/UNITS Supply Voltage 3 V DC Power Dissipation 25 mW Operating Temperature Range -10°C to +40°C Storage Temperature Range -20°C to +70°C MGND BINC AOUT BOUT R3 GND 2 3 4 5 6 7 MPO 18 8 VB 9 OUT 1 IN 16 VMIC 15 17 CAUTION CLASS 1 ESD SENSITIVITY ELECTRICAL CHARACTERISTICS PARAMETER 14 13 AIN BIN 12 11 AOUTR 10 R1 R2 GND1 GND2 Conditions: Frequency = 3 kHz, Temperature = 25°C, Supply Voltage V B = 1.3 V SYMBOL CONDITIONS MIN TYP MAX UNITS I AMP 75 160 245 µA Transducer Current I TRANS 1 175 225 290 µA Transducer Current I TRANS 2 S1 = Closed, S3 = Closed 450 520 600 µA Transducer Current I TRANS 3 S1 = Closed, S2 = Closed Amplifier Current 650 725 820 µA Bias Voltage (Pad 15) VP15 1.27 1.3 - V Bias Voltage (Pad 5) V P5 21.5 28.5 35.5 mV System Voltage Gain Gain VIN = -90 dBV 61.5 64.5 67.5 dB Maximum Power Output MPO VIN = -60 dBV -17 -12 -9 dBV All conditions and parameters remain as shown in the Test Circuit unless otherwise specified in CONDITIONS Column. V PX - Actual voltage measured on the pin at given condition (X is pin number). Notes: 1. All capacitors on Hybrid ± 20%, all screened on resistors ± 5%. 1.3V 8 GS3019 VCC 8 4k 15 7 C1 4µ7 C4 9 7 0µ1 2k7 S1 21k RS C2 16 3k9 220n 6 -A -B -C VOUT 2 VIN RE 125 LS509 - DIE 5 3 4 1 R1 58 1 14 3 12 R2 98 C3 220n R3 5k6 2 13 4 RGT RVC 47k5 47k5 6 11 17 S2 All resistors in ohms, all capacitors in farads unless otherwise stated. Fig. 1 Production Test Circuit 521 - 04 - 02 9 10 2 18 S3 10 5 VB 8 GS3019 VCC ED1915 8 4k 15 7 C1 4µ7 C4 9 7 50k 0µ1 RMPO 21k EK3033 16 C2 6 220n -A -B -C 9 10 2 RE 125 LS509 - DIE 5 3 4 1 1 R1 58 C3 220n R3 5k6 14 12 3 R2 98 2 13 6 4 17 11 18 10 5 50k 50k RVC RGT All resistors in ohms, all capacitors in farads unless otherwise stated. Fig. 2 Typical Hearing Instrument Application VOLUME CONTROL + - BATTERY 1 MIC 2 4 3 16 5 17 6 7 18 8 + + 15 14 13 12 11 10 9 REC GAIN TRIMMER MPO TRIMMER Fig. 3 Typical Assembly Diagram 3 521 - 04 - 02 1.3V 8 2.6V GS3019 VCC 8 4k 15 6k8 7 C1 4µ7 C4 9 7 0µ1 RMPO 50k 21k 3k9 16 C2 220n 6 -A -B -C 10µ OUT 9 10 2 VIN RE 125 LS509 - DIE 5 3 4 100k 1 1 R2 98 R1 58 C3 220n R3 5k6 14 12 3 2 13 6 4 17 11 18 10 5 47k5 47k5 CLC RGT RVC All resistors in ohms, all capacitors in farads unless otherwise stated. Fig. 4 Characterization Circuit (used to generate typical curves) 0 0 -10 RVC=100k OUTPUT LEVEL (dBV) OUTPUT LEVEL (dBV) CLC =0 CLC=0µ1 CLC=47nF CLC=22nF -20 CLC=10nF -30 -10 -20 RVC=47k RVC=22k -30 R VC=10k -40 RVC=3k9 -50 -60 -40 20 100 1k 10k -70 -130 20k -120 FREQUENCY (Hz) Fig. 5 521 - 04 - 02 -110 -100 -90 -80 -70 -60 -50 INPUT LEVEL (dBV) Fig. 6 Frequency Response for Different CLC Capacitors 4 I/O Curves at Various R VC Settings -40 0.276 (7.01) GS3019 0.101 (2.57) XXXXXX 0.104 MAX (2.64) 1 2 3 4 6 5 18 17 16 14 13 12 15 11 7 8 10 9 Dimensions are in inches. Dimensions in parenthesis are in millimetres, converted from inches and include minor round off errors. 1.0000 inches = 25.400 mm. Dimensions ± 0.005 (± 0.13) unless otherwise stated. Pad numbers for illustration purposes only. Smallest pad 0.023 x 0.013 (0.58 x 0.33). Largest pad 0.036 x 0.027 (0.92 x 0.69). XXXXXX - work order number. This hybrid is designed for point to point manual soldering. Fig. 7 Hybrid Layout & Dimensions 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 March 1994 Gennum Corporation. All rights reserved. 5 Printed in Canada. 521 - 04 - 02