Stand Alone Class B Hybrid GM3008 - HYB DATA SHEET FEATURES DESCRIPTION • up to 80 dB of electrical gain The GM3008 hybrid consists of two of Gennum's proprietary integrated circuits, the GP537 preamplifier and the GS551 class B output driver. Such a configuration provides up to 80 dB (typ) of electrical gain. Low total harmonic distortion and input noise make this circuit well suited for high power applications. Various additional pads have been provided to allow for maximum flexibility of system performance. • dedicated preamp for a telecoil • direct coupling of a telecoil to preamp • low input referred noise • on chip voltage regulator • capable of driving low impedance receivers The GP537 contains two low noise inverting preamplifiers with an open loop voltage gain of typically 50 dB, a telecoil preamplifier with its own reference voltage which enables for direct coupling of the telecoil and a voltage regulator with typically 74 dB of supply rejection capable of working with a supply voltage down to 1.1 volts. This chip also enables the user to disconnect the telecoil preamplifier when it is not required, thereby saving approximately 85 µA of current. STANDARD PACKAGING • Hybrid typical dimensions 0.250 in x 0.150 in x 0.115 in (6.35 mm x 3.81 mm x 2.92 mm) The GS551 class B amplifier contains three basic blocks, a low noise inverting preamplifier, a unity gain phase splitter and a fixed gain class B output stage. GM3008 4 VREG 11 C1 3µ3 TIN 14 6 GS551 REGULATOR 2 VBT 16 TREF 15 GP537 3 1 11 + - 1 5 -T -B -A -C E 5 10 REFERENCE VOLTAGE TOUT 13 INPUT 10 MGND 12 8 10 9 C2 R1 47n 18k2 7 R2 R3 105k 20k 6 2 AIN 18 AOUT 7 BIN 9 BOUT OUT 1 3 VCC 2 OUT 2 7 8 3 C4 60k 15k C3 17 9 4 R5 R4 4 -D 47n C5 47n 47n 8 6 CF CIN 5 COUT 1 PGND All resistors in ohms, all capacitors in farads unless otherwise stated. FUNCTIONAL BLOCK DIAGRAM Revision Date: May 1998 Document No. 520 - 70 - 05 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] PAD CONNECTION ABSOLUTE MAXIMUM RATINGS PARAMETER Supply Voltage 3 VDC Power Dissipation 25 mW 15 1 VALUE / UNITS 14 2 13 12 16 Operating Temperature Range -10° C to 40° C Storage Temperature Range -20° C to 70° C 3 18 11 6 17 4 10 8 7 5 9 ELECTRICAL CHARACTERISTICS Conditions: Frequency = 1 kHz, Temperature = 25°C, Supply Voltage VCC = 1.3 V Notes:1. All capacitors on hybrid ± 20%, all printed on resistors ± 5% PARAMETER SYMBOL Amplifier Current IAMP Telecoil Current ITCOIL Transducer Current ITRANS CONDITIONS S1 = Open Quiescent Current V IN = 0 V MIN TYP MAX UNITS 190 365 550 µA 40 85 130 µA 100 250 390 µA V REGULATOR Regulator Voltage VREG 0.88 0.93 0.98 Regulator Supply Rejection PSRR 60 74 - dB T COIL Bias Voltage VBIAS Pads 13, 14 540 580 620 mV Telecoil Offset Voltage VTOFF V P15 - V P14 -10 0 10 mV Input Bias Current IBIAS -25 0 25 nA Output Voltage Swing - Low VOL 200 280 - mV Maximum Sourcing Current ISOURCE 15 30 - µA Open Loop Voltage Gain AVOL 46 50 - dB STAGES A & B Bias Voltage VBIAS 540 580 620 mV Input Bias Current IBIAS Pads 7, 9, 17, 18 -25 0 25 nA Output Voltage Swing - Low VOL 200 280 - mV Maximum Sourcing Current ISOURCE 15 30 - µA Open Loop Voltage Gain AVOL 46 50 - dB 540 580 620 mV - nA STAGE C Bias Voltage VBIAS Pads 5, 6 Input Bias Current IBIAS - 0 Output Voltage Swing - Low VOL - 280 - mV Maximum Sourcing Current ISOURCE - 50 - µA Open Loop Voltage Gain AVOL - 50 - dB GAIN - 0 - dB AC Voltage Gain GAIN - 28 - dB Maximum Sourcing Current ISOURCE - >35 - mA STAGE D Voltage Gain STAGE E SYSTEM PERFORMANCE System Voltage Gain SGAIN V IN = -60 dBV, R F = 39k 56 60 64 dB Telecoil Gain TGAIN S2 = b; VIN = -60 dBV 16 18.5 20 dB Total Harmonic Distortion THD VIN = -60dB, RF = 39k - 3 5 % Input Referred Noise IRN - 2.5 - µV All parameters and switches remain as shown in the Test Circuit unless otherwise stated in CONDITIONS column. 520 - 70 - 05 2 GM3008 4 GP537 3 11 S1 C1 3µ3 1 15 11 14 1.3 VDC 2 16 1µ 6 GS551 REGULATOR + - 5 -T VIN 13 a 10 (0V AC) ITRANS -D 3 8 10 C2 R1 47n 18k2 7 2 6 R2 R3 105k 20k 10 2 7 3 8 C4 R4 15k C3 47n 9 7 18 9 4 R5 12 17 390 IAMP+ITCOIL 5 REFERENCE VOLTAGE 9 4 E -B -A -C 1k 10k S2 b VOUT 1 8 47n 60k C5 47n 5 6 RF=390k 1 All resistors in ohms, all capacitors in farads unless otherwise stated. Fig. 1 Production Test Circuit 1.3VDC GM3008 4 GP537 3 11 6 GS551 REGULATOR C1 3µ3 2 16 1 15 11 14 + - 1 5 -T -B -A -C E 10 10k MIC EK3024 12 C2 R1 47n 18k2 7 8 10 13 10 3 5 2 REFERENCE VOLTAGE 9 R2 R3 105k 20k 6 2 7 9 8 47n 47n 8 7 REC CI2960 3 C4 60k 15k C3 18 9 4 R5 R4 17 4 -D C5 47n 6 5 1 390k All resistors in ohms, all capacitors in farads unless otherwise stated. V.C. Fig. 2 Typical Hearing Instrument Application 3 520 - 70 - 05 BATTERY + 5 7 8 9 - VOLUME CONTROL 10 4 17 11 + M/T SWITCH 6 18 REC 3 16 MIC 2 12 13 14 RES 15 1 COIL Fig. 3 Maximum Components Configuration Assembly Diagram of GM3008 GM3008 4 GP537 3 11 1 15 1µ 11 14 VIN= -60dBV at 1kHz + - 1 5 -T -B -A -C RMPO E 3 5 10 REFERENCE VOLTAGE 8 10 9 C2 R1 10 47n 7 R2 R3 105k 20k 6 2 R4 18k2 15k C3 12 18 17 9 7 9 4 7 C4 60k 47n C5 47n 8 47n 6 5 1 390k Fig. 4 Characterization Circuit (used to generate Typical Curves) 4 8 R5 All resistors in ohms, all capacitors in farads unless otherwise stated. 520 - 70 - 05 VOUT 4 -D 10k 13 VIN= -80dBV at 1kHz 1.3VDC 2 16 1k 6 GS551 REGULATOR C1 3µ3 3 2 390 -10 5 -5 -20 RVC=390k -30 -40 OUTPUT (dBV) OUTPUT (dBV) -15 -25 -35 -45 RVC=0 -55 -50 -60 -70 -80 -90 -65 -75 -140 -120 -100 -80 -60 -40 -20 -100 -140 0 -120 -100 -80 -20 2 0 0 -2 -2 RELATIVE OUTPUT (dB) RELATIVE OUTPUT (dB) 2 -4 -6 -8 -10 -12 -14 -16 -18 -4 -6 -8 -10 -12 -14 -16 -18 -20 20 -20 100 1k 10k 20k 20 100 FREQUENCY (Hz) 1k 10k 20k FREQUENCY (Hz) Fig. 7 Frequency Response (Blocks A to E) Fig. 8 Frequency Response (Telecoil) 20 10 18 9 16 8 14 7 12 6 THD (%) THD (%) -40 Fig. 6 Input vs Output (Telecoil) Fig. 5 Input vs Output as RVC is Varied (Blocks A to E) 10 8 5 4 6 3 4 2 2 1 0 -90 -60 INPUT (dBV) INPUT (dBV) 0 -88 -86 -84 -82 -80 -78 -76 -70 -74 -66 -62 -58 -54 -50 -46 -42 -38 INPUT (dBV) INPUT (dBV) Fig. 9 THD vs Input (Blocks A to E) Fig.10 THD vs Input (Telecoil) 5 520 - 70 - 05 80 4 RMPO=0 70 60 RMPO=100 -4 GAIN (dB) OUTPUT (dBV) 0 -8 RMPO=500 50 40 30 -12 20 RMPO=1k -16 -20 -100 -95 -90 -85 -80 -75 -70 -65 10 0 0.8 -60 0.9 1.0 1.0 0.9 0.9 REGULATOR VOLTAGE (V) AMPLIFIER CURRENT (mA) 1.0 0.8 0.7 0.6 0.5 0.4 0.3 0.2 1.4 1.5 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2 1.3 1.4 0.0 0.4 1.5 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2 1.3 1.4 1.5 SUPPLY VOLTAGE (V) SUPPLY VOLTAGE (V) Fig. 14 Regulator Voltage vs Supply Voltage Fig. 13 Amplifier Current vs Supply Voltage 30 RELATIVE TRANSDUCER CURRENT (mA) 50 RELATIVE AMPLIFIER CURRENT (µA) 1.3 0.1 0.1 30 10 -10 -30 -50 -70 -90 -110 -130 -150 -20 -15 -10 -5 0 5 10 15 20 25 30 35 20 10 0 -10 -20 -30 -40 -50 -60 -70 -20 -15 40 -10 -5 0 5 10 15 20 25 30 35 TEMPERATURE (°C) TEMPERATURE (°C) Fig. 16 Transducer Current vs Temperature Fig. 15 Amplifier Current vs Temperature 520 - 70 - 05 1.2 Fig. 12 Gain vs Supply Voltage Fig. 11 Maximum Power Output vs RMPO 0.0 0.4 1.1 SUPPLY VOLTAGE (V) INPUT (dBV) 6 40 0.250 (6.35 ) 0.150 (3.81 ) GM3008 XXXXXX 0.125 MAX. (3.18 ) 1 15 C5 2 14 C4 13 12 16 3 11 18 6 4 17 C3 10 C2 R5 7 5 8 9 Dimensions are in inches. Dimensions shown in parenthesis are in millimetres, converted from inches and include minor round off errors. 1.0000 inches = 25.40 mm. Dimension ±0.005 (±0.13) unless otherwise stated. Pad numbers for illustration only. Smallest pad 0.020 x 0.020 (pads 2 - 18). Largest pad 0.046 x 0.020 (pad 1). XXXXXX - work order number. This hybrid is designed for point to point manual soldering. Fig. 17 Hybrid Layout and Dimensions CAUTION CLASS 1 ESD SENSITIVITY GENNUM CORPORATION DOCUMENT IDENTIFICATION: DATA SHEET 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 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: GENNUM JAPAN CORPORATION Updated to Data sheet 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 August 1992 Gennum Corporation. All rights reserved. 7 Printed in Canada. 520 - 70 - 05