GM3008

Stand Alone Class B Hybrid GM3008 - HYB DATA SHEET FEATURES • up to 80 dB of electrical gain • 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 DESCRIPTION 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. 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. 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. 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) 4 GM3008 GP537 GS551 6 VREG 11 VBT 16 TREF 15 TIN 14 3 C1 3µ3 REGULATOR 2 1 11 + - 1 5 4 3 -C -D E 10 REFERENCE VOLTAGE 2 OUT 1 VCC OUT 2 -T 8 -A 10 7 6 -B 5 9 2 4 9 7 8 3 R2 TOUT INPUT 13 R3 20k R4 C3 15k 47n 8 6 R5 60k C2 10 R1 18k2 17 105k C4 47n C5 47n 5 1 MGND 12 47n 18 7 9 AIN All resistors in ohms, all capacitors in farads unless otherwise stated. AOUT BIN BOUT CF CIN COUT PGND 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: hipinfo@gennum.com ABSOLUTE MAXIMUM RATINGS PARAMETER Supply Voltage Power Dissipation Operating Temperature Range Storage Temperature Range VALUE / UNITS 3 VDC 25 mW -10° C to 40° C -20° C to 70° C 3 6 4 5 2 1 PAD CONNECTION 15 14 13 12 16 18 17 10 7 8 9 11 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 Amplifier Current Telecoil Current Transducer Current REGULATOR Regulator Voltage Regulator Supply Rejection T COIL Bias Voltage Telecoil Offset Voltage Input Bias Current Output Voltage Swing - Low Maximum Sourcing Current Open Loop Voltage Gain STAGES A & B Bias Voltage Input Bias Current Output Voltage Swing - Low Maximum Sourcing Current Open Loop Voltage Gain STAGE C Bias Voltage Input Bias Current Output Voltage Swing - Low Maximum Sourcing Current Open Loop Voltage Gain STAGE D Voltage Gain STAGE E AC Voltage Gain Maximum Sourcing Current SYSTEM PERFORMANCE System Voltage Gain Telecoil Gain Total Harmonic Distortion Input Referred Noise SYMBOL IAMP ITCOIL ITRANS VREG PSRR CONDITIONS S1 = Open MIN 190 40 TYP 365 85 250 MAX 550 130 390 UNITS µA µA µA Quiescent Current V IN = 0 V 100 0.88 60 0.93 74 0.98 - V dB VBIAS VTOFF IBIAS VOL ISOURCE AVOL VBIAS IBIAS VOL ISOURCE AVOL VBIAS IBIAS VOL ISOURCE AVOL GAIN Pads 13, 14 V P15 - V P14 540 -10 -25 200 15 46 580 0 0 280 30 50 620 10 25 - mV mV nA mV µA dB Pads 7, 9, 17, 18 540 -25 200 15 46 580 0 280 30 50 620 25 - mV nA mV µA dB Pads 5, 6 540 - 580 0 280 50 50 620 - mV nA mV µA dB - 0 - dB GAIN ISOURCE SGAIN TGAIN THD IRN V IN = -60 dBV, R F = 39k S2 = b; VIN = -60 dBV VIN = -60dB, RF = 39k - 28 >35 - dB mA 56 16 - 60 18.5 3 2.5 64 20 5 - dB dB % µV All parameters and switches remain as shown in the Test Circuit unless otherwise stated in CONDITIONS column. 520 - 70 - 05 2 GM3008 4 3 11 GP537 GS551 6 1.3 VDC VOUT 4 S1 16 15 C1 3µ3 REGULATOR 2 1 11 + - 1 5 -C -D E 3 ITRANS 1µ 14 -T 8 -A 10 7 6 -B 5 REFERENCE VOLTAGE 10 2 IAMP+ITCOIL 390 1k 10k 9 2 4 9 7 8 3 R2 S2 b VIN (0V AC) 13 10 R3 20k R4 C3 15k 47n 8 6 5 1 C4 R5 60k 47n C5 47n C2 47n R1 18k2 17 105k a 12 18 7 9 RF=390k All resistors in ohms, all capacitors in farads unless otherwise stated. Fig. 1 Production Test Circuit GM3008 4 3 11 1.3VDC GS551 6 GP537 C1 3µ3 16 15 14 REGULATOR 2 1 11 + - 1 5 4 3 -C -D E 10 REFERENCE VOLTAGE 2 -T -A 10 8 7 6 -B 5 REC CI2960 10k 9 2 4 9 7 8 3 R2 13 R3 20k R4 C3 15k 47n 8 6 5 1 10 MIC EK3024 12 C2 47n R1 18k2 17 105k R5 60k C4 47n C5 47n 18 7 9 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 VOLUME CONTROL 9 10 8 7 17 11 16 12 13 14 15 18 6 3 2 1 REC M/T SWITCH MIC RES COIL Fig. 3 Maximum Components Configuration Assembly Diagram of GM3008 4 3 11 GM3008 GP537 GS551 6 C1 3µ3 REGULATOR 2 16 15 1 11 + - 5 -C 1k 1µ 14 -T 8 -A 10 7 6 -B 5 REFERENCE VOLTAGE VIN= -60dBV at 1kHz 10k 9 13 2 4 R2 C2 R1 18k2 105k R3 20k R4 C3 15k 47n 8 6 5 1 R5 60k VIN= -80dBV at 1kHz 10 47n 12 17 18 7 9 390k All resistors in ohms, all capacitors in farads unless otherwise stated. Fig. 4 Characterization Circuit (used to generate Typical Curves) 520 - 70 - 05 4 5 4 1.3VDC VOUT 1 4 + + -D E 10 3 2 RMPO 390 9 7 8 3 C4 47n C5 47n -10 5 -5 -15 RVC=390k -20 -30 -40 OUTPUT (dBV) -25 -35 -45 OUTPUT (dBV) -50 -60 -70 -80 -90 -100 -140 RVC=0 -55 -65 -75 -140 -120 -100 -80 -60 -40 -20 0 -120 -100 -80 -60 -40 -20 INPUT (dBV) INPUT (dBV) Fig. 5 Input vs Output as RVC is Varied (Blocks A to E) Fig. 6 Input vs Output (Telecoil) 2 0 2 0 -2 RELATIVE OUTPUT (dB) -2 -4 -6 -8 -10 -12 -14 -16 -18 -20 20 100 1k 10k 20k RELATIVE OUTPUT (dB) -4 -6 -8 -10 -12 -14 -16 -18 -20 20 100 1k 10k 20k FREQUENCY (Hz) FREQUENCY (Hz) Fig. 7 Frequency Response (Blocks A to E) Fig. 8 Frequency Response (Telecoil) 20 18 16 14 10 9 8 7 THD (%) THD (%) 12 10 8 6 4 2 0 -90 6 5 4 3 2 1 0 -88 -86 -84 -82 -80 -78 -76 -74 -70 -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 4 RMPO=0 0 80 70 60 OUTPUT (dBV) RMPO=100 GAIN (dB) -4 50 40 30 20 -8 RMPO=500 -12 RMPO=1k -16 10 0 0.8 -20 -100 -95 -90 -85 -80 -75 -70 -65 -60 0.9 1.0 1.1 1.2 1.3 1.4 1.5 INPUT (dBV) SUPPLY VOLTAGE (V) Fig. 11 Maximum Power Output vs RMPO Fig. 12 Gain vs Supply Voltage 1.0 0.9 1.0 0.9 REGULATOR VOLTAGE (V) AMPLIFIER CURRENT (mA) 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.0 0.4 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.0 0.4 0.5 0.6 0.7 0.8 0.9 1.0 1.1 1.2 1.3 1.4 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. 13 Amplifier Current vs Supply Voltage Fig. 14 Regulator Voltage vs Supply Voltage 50 30 RELATIVE TRANSDUCER CURRENT (mA) RELATIVE AMPLIFIER CURRENT (µA) 30 10 -10 -30 -50 -70 -90 -110 -130 -150 -20 -15 -10 -5 0 5 10 15 20 25 30 35 40 20 10 0 -10 -20 -30 -40 -50 -60 -70 -20 -15 -10 -5 0 5 10 15 20 25 30 35 40 TEMPERATURE (°C) TEMPERATURE (°C) Fig. 15 Amplifier Current vs Temperature Fig. 16 Transducer Current vs Temperature 520 - 70 - 05 6 0.250 (6.35 ) 0.150 (3.81 ) GM3008 XXXXXX 0.125 MAX. (3.18 ) 1 2 3 6 4 R5 15 C5 C4 14 13 12 16 18 17 C3 C2 7 8 10 9 11 5 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 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 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 JAPAN CORPORATION 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. Printed in Canada. 7 520 - 70 - 05