GM3008 GENNUM | Alldatasheet

Document overview

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Technical content

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 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) Revision Date: May 1998 GP537 GM3008 TIN INPUT PGND 3µ3 18k2 VREG - T VBT TREF TOUT MGND 47n 105k 20k - A R4 15k C3 47n - B REGULATOR 47n 47n OUT 1 GS551 7942 - C - D OUT 2 VCC REFERENCE VOLTAGE 60k E COUTCINBOUTBINAOUTAIN CF 8 65 1 971817 GM3008 - HYB DATA SHEET

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. Stand Alone Class B Hybrid FUNCTIONAL BLOCK DIAGRAM All resistors in ohms, all capacitors in farads unless otherwise stated. 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 Document No. 520 - 70 - 05

Operating Temperature Range -10 ° C to 40° C Storage Temperature Range -20 ° C to 70° C PAD CONNECTION PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Amplifier Current IAMP S1 = Open 190 365 550 µA Telecoil Current ITCOIL 40 85 130 µA Transducer Current ITRANS Quiescent Current V IN = 0 V 100 250 390 µA REGULATOR Regulator Voltage V REG 0.88 0.93 0.98 V Regulator Supply Rejection PSRR 60 74 - dB T COIL Bias Voltage V BIAS Pads 13, 14 540 580 620 mV Telecoil Offset Voltage V TOFF VP15 - VP14 -10 0 10 mV Input Bias Current IBIAS -25 0 25 nA Output Voltage Swing - Low V OL 200 280 - mV Maximum Sourcing Current ISOURCE 15 30 - µA Open Loop Voltage Gain A VOL 46 50 - dB STAGES A & B Bias Voltage V BIAS Pads 7, 9, 17, 18 540 580 620 mV Input Bias Current IBIAS -25 0 25 nA Output Voltage Swing - Low V OL 200 280 - mV Maximum Sourcing Current ISOURCE 15 30 - µA Open Loop Voltage Gain A VOL 46 50 - dB STAGE C Bias Voltage V BIAS Pads 5, 6 540 580 620 mV Input Bias Current IBIAS -0 - n A Output Voltage Swing - Low V OL - 280 - mV Maximum Sourcing Current ISOURCE -5 0 - µA Open Loop Voltage Gain A VOL -5 0 - d B STAGE D Voltage Gain GAIN - 0 - dB STAGE E AC Voltage Gain GAIN - 28 - dB Maximum Sourcing Current I SOURCE - >35 - mA SYSTEM PERFORMANCE System Voltage Gain S GAIN VIN = -60 dBV, R F = 39k 56 60 64 dB Telecoil Gain T GAIN S2 = b; V IN = -60 dBV 16 18.5 20 dB Total Harmonic Distortion THD V IN = -60dB, R F = 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. 5 9 104 131415 7 8 Conditions: Frequency = 1 kHz, Temperature = 25 °C, Supply Voltage V CC = 1.3 V Notes:1. All capacitors on hybrid ± 20%, all printed on resistors ± 5%

ELECTRICAL CHARACTERISTICS

Fig. 1 Production Test Circuit Fig. 2 Typical Hearing Instrument Application All resistors in ohms, all capacitors in farads unless otherwise stated. All resistors in ohms, all capacitors in farads unless otherwise stated. GP537 GM3008 3µ3 18k2 - T 47n 105k 20k - A R4 15k C3 47n - B REGULATOR 1.3VDC 10k 390k 47n 47n GS551 7942 - C - D 60k REFERENCE VOLTAGE 1817 7 9 8 6 5 1 E V.C. REC CI2960 MIC EK3024 GP537 GM3008 3µ3 18k2 - T 105k 20k - A R4 15k C3 47n - B REGULATOR a b 10k1k 47n 47n GS551 7942 - C - D 60k REFERENCE VOLTAGE

1.3 VDC

RF=390k E VIN (0V AC) ITRANS IAMP+ITCOIL14 17 18 8 6 5 17 9 47n

  • + REC VOLUME CONTROL BATTERY COILRES MIC 1413 15 9 8 7 Fig. 4 Characterization Circuit (used to generate Typical Curves) All resistors in ohms, all capacitors in farads unless otherwise stated. Fig. 3 Maximum Components Configuration Assembly Diagram of GM3008 GP537 GM3008 - T 3µ3 105k 20k - A R4 15k C3 47n - B REGULATOR 47n 47n GS551 7942 - C - D 60k REFERENCE VOLTAGE 1.3VDC E 390k 1817 7 9 8 6 1 VOUT RMPO 390 18k2 47n 10k 1k 1µ VIN= -60dBV at 1kHz V IN= -80dBV at 1kHz

FREQUENCY (Hz) Fig. 5 Input vs Output as RVC is Varied (Blocks A to E) -15 -25 -35 -45 -55 -65 -75 -140 -120 -100 -80 -60 -40 -20 0 INPUT (dBV) -10 -20 -30 -40 -50 -60 -70 -80 -90 -100 -140 -120 -100 -80 -60 -40 -20 INPUT (dBV) Fig. 6 Input vs Output (Telecoil) -10 -12 -14 -16 -18 -20 20 100 1k 10k 20k FREQUENCY (Hz) Fig. 7 Frequency Response (Blocks A to E) -10 -12 -14 -16 -18 -20 Fig. 8 Frequency Response (Telecoil) INPUT (dBV) INPUT (dBV) Fig.10 THD vs Input (Telecoil) RVC=390k RVC=0 Fig. 9 THD vs Input (Blocks A to E) OUTPUT (dBV)THD (%) RELATIVE OUTPUT (dB) OUTPUT (dBV) RELATIVE OUTPUT (dB) THD (%)

-100 -95 -90 -85 -80 -75 -70 -65 -60 INPUT (dBV) RMPO=0 RMPO=100 RMPO=500 RMPO=1k Fig. 11 Maximum Power Output vs RMPO SUPPLY VOLTAGE (V) Fig. 12 Gain vs Supply Voltage 1.0 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.0 SUPPLY VOLTAGE (V) SUPPLY VOLTAGE (V) Fig. 14 Regulator Voltage vs Supply Voltage 1.0 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.0 -20 -15 -10 -5 0 5 10 15 20 25 30 35 40 TEMPERATURE (°C) Fig. 15 Amplifier Current vs Temperature -10 -30 -50 -70 -90 -110 -130 -150 -10 -20 -30 -40 -50 -60 -70 -20 -15 -10 -5 0 5 10 15 20 25 30 35 40 TEMPERATURE (°C) Fig. 16 Transducer Current vs Temperature -12 -16 -20 Fig. 13 Amplifier Current vs Supply Voltage OUTPUT (dBV) GAIN (dB) AMPLIFIER CURRENT (mA)RELATIVE AMPLIFIER CURRENT (µA) RELATIVE TRANSDUCER CURRENT (mA) REGULATOR VOLTAGE (V)

Fig. 17 Hybrid Layout and Dimensions GM3008 XXXXXX 0.150 (3.81 ) 0.125 MAX. (3.18 ) 0.250 (6.35 ) 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 h ybrid is designed for point to point manual soldering. 97 8 15 14 C5 C4 C3 C2 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. 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. REVISION NOTES: Updated to Data sheet 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

C-101, Miyamae Village, 2-10-42 Miyamae, Suginami-ku, Tokyo 168-0081, Japan Tel. +81 (3) 3334-7700 Fax: +81 (3) 3247-8839