GS3015

V.C. Preamp Hybrid for Class D GS3015 - HYB DATA SHEET FEATURES • Gennum's GL504 preamp • mounts on back of Microtronic PJ88S VC Socket • low external parts count • designed to drive Class D integrated receivers • adjustable peak clipper • low current drain (150 µA) typical • low noise and distortion DESCRIPTION The GS3015 incorporates Gennum's GL504 preamp, three of the required capacitors and a mid supply referencing 48K resistor. All that is required for a fully functional hearing aid system is the addition of a microphone, receiver, volume control, interstage coupling capacitor and an MPO adjusting potentiometer. The GS3015 has been designed to mount on the back of the Microtronics PJ88S Socket Volume Control. This translates to a saving in space within the hearing instrument, as the circuitry mounts directly beneath the volume control. If the VC requires replacing, it is a simple procedure to remove the defective unit from the socket and install a new device. This does not disturb the electronic circuitry. The major advantage of the GL504 over other preamplifiers is the electronic MPO adjustment. Since conventional MPO is not possible in a class D receiver, Gennum provides it in the preamp. STANDARD PACKAGING • Hybrid Typical Dimensions 0.192 in x 0.194 in x 0.113 in (4.88 mm x 4.93 mm x 2.85 mm) 10 VB RMIC VMIC 2 C1 6 3µ3 7 RPULL C3 47n 8 1 BOUT 4 VREC AIN 11 C2 47n -A 5 -B R1 48K 4 3 1 2 3 CIN 6 CT 5 7 AOUT BIN 8 GND MPO 9 GS3015 HYBRID All resistors in ohms, all capacitors in farads unless otherwise stated BLOCK DIAGRAM Revision Date: May 1998 Document No. 520 - 92 - 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 V DC 25 mW -10°C to +40° C -20°C to +70° C BIN CAUTION CLASS 1 ESD SENSITIVITY MPO CT PIN CONNECTION AOUT VREC 5 6 4 3 CIN 7 2 VMIC 8 9 GND 10 VB TOP VIEW 11 AIN 1 BOUT ELECTRICAL CHARACTERISTICS Conditions: Frequency = 1 kHz, Temperature = 25°C PARAMETER Amplifier Current System Gain Maximum Output MPO Range Input Referred Noise Distortion On Chip Pull-up Resistance On Chip Microphone Resistor Mic Decoupling Capacitor Input Coupling Capacitor Output Coupling Capacitor Output Resistor Output Impedance (Pad 1) SYMBOL IAMP AV MPO ∆MPO IRN THD RPULL RMIC C1 C2 C3 R1 R OUT CONDITIONS V IN = 0, RMPO = 0Ω V IN = -80 dBV, R MPO = 0 Ω, Freq.= 5 kHz V IN = -50 dBV, R MPO = 0 Ω V IN = -50 dBV, R MPO = 10 k Ω NFB 0.2 to 10 kHz at 12 dB/oct MIN 75 44.5 -16 10 -20% -10% -10% -5% - TYP 150 46.5 -14 12 2