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| Class A Compression Amplifier LD511 DATA SHEET FEATURES * 64 dB typical electrical gain * 0.94 VDC voltage regulator * 7 ms attack time, 40 ms release time * 15 dB threshold adjustment * low noise and distortion * compression ratio : 1 * 0.3 kHz - 6 kHz frequency response DESCRIPTION The LD511 is a Class A compression amplifier which can operate over a range of DC battery voltages from 1.1 V to 2.4 V. A voltage regulator, which is independent of supply voltage variations, is on-chip to supply a stable 0.94 VDC bias to the amplifier circuitry and to the microphone. The LD511, in compression, has approximately 15 dB of threshold adjustment by varying RTH (see application circuit) and a compression function ratio of : 1. Minimum attack and release times are fixed at 7 ms and 40 ms respectively and they can be adjusted simultaneously by changing the filter capacitor on pin 8, although the ratio of attack to release time is kept constant. The output stage bias can be set to accommodate different receiver impedances by changing the value of RE . The voltage across RE (pin 2 to ground) is a constant 27 mV so the bias current is 27 mV divided by the total value of RE in parallel with 500 . STANDARD PACKAGING * 10 pin MICROpac * 10 pin MINIpac * 10 pin PLID (R) * 10 pin SLT * Chip (59 x 59 mils) Au Bump A OUT 10 B IN 1 VB 6 VOLTAGE REGULATOR VREG 7 20K 9 3 A IN RIN -A 10K 35K -B B OUT RE 5 RECTIFIER 8 4 2 AGC CAGC All resistors in ohms, all capacitors in farads unless otherwise stated GND RE BLOCK DIAGRAM Revision Date: January 2001 500 - 32 - 11 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 2.4 V DC 25 mW -10C to 40 C -20C to 70 C AGC GND B OUT RE B IN PIN CONNECTION 5 6 VB VREG CAGC A IN 1 10 A OUT CAUTION CLASS 1 ESD SENSITIVITY ELECTRICAL CHARACTERISTICS PARAMETER Conditions: Frequency = 1 kHz, Temperature = 25C, Supply Voltage VB = 1.3 VDC SYMBOL CONDITIONS COMPRESSION INACTIVE (S1 OPEN) MIN TYP MAX UNITS Gain Input Referred Noise Total Harmonic Distortion Amplifier Current Transducer Current Input Impedance Regulated Voltage On Chip Emitter Resistance Emitter Bias Voltage (pin 2) AV IRN THD IAMP ITRANS RIN VREG RE VRE COMPRESSION ACTIVE (S1 CLOSED) NFB 0.2 - 10kHz at 12 dB/oct 60 1.35 0.90 - 64 2.0 1 0.4 1.6 15 0.96 500 27 68 4.0 3 0.6 2.0 1.0 - dB V % mA mA k VDC mV Compression Range Total Harmonic Distortion Attack Time Release Time Compression Output Compression Output Change THDCOMP TATT TREL VCOMPOUT V COMPOUT V2 = 1 mV V2 = 120 mV; Note 1 V2 = 1 mV V2 switched from 112V to 2 mV - 4.0 7 40 0.10 13 7.0 0.18 20 dB % ms ms VRMS mVRMS All parameters and switches remain as shown in Test Circuit unless otherwise stated in CONDITIONS column Notes: 1. VCOMPOUT = VOUT[V2 =120mV] - VCOMPOUT 0.033 IAMP RB 4.7 10 1 6 VB=1.3 VDC ITRANS 0.068 RL 600 3 VOLTAGE REGULATOR V2 7 VOUT 20K 56K 3.9K CS 0.047 RS 50 RECTIFIER 56 27K 0.0047 8 4 2 9 -A 10K 35K -B Hammond 99966 RE 5 S1 10 2.2 15 All resistors in ohms, all capacitors in farads unless otherwise stated Fig. 1 Test Circuit 500 - 32 - 11 2 7 10 6 80 10K 20K 15K 3 9 32K 2 3.2K 500 4 8 5 1 All resistors in ohms, all capacitors in farads unless otherwise stated Fig. 2 Functional Schematic VB=1.3 VDC RVC 10K 10 VOLTAGE REGULATOR 7 10 9 0.1 20K 0.1 1 6 ED1913 -A 10K 35K 3 -B RTH 100K 5 4 2 47 4.7n 0.068 RE RECTIFIER 8 2.2 All resistors in ohms, all capacitors in farads unless otherwise stated Fig. 3 LD511 Stand Alone Application Circuit VB=1.3 VDC RVC 10K 10 VOLTAGE REGULATOR 7 10 9 0.1 20K MPO 50K 3 10K 35K 0.1 1 6 1.0 EP3075 0.1 -A -B RE RTH 100K 5 4 0.0047 2 All resistors in ohms, all capacitors in farads unless otherwise stated RECTIFIER 8 2.2 Fig. 4 LD511/Class D Application Circuit 3 500 - 32 - 11 0 63 REGULATOR VOLTAGE GAIN(dB) -0.1 62 -0.2 VOLTAGE GAIN (dB) 0 10 20 30 40 50 60 70 80 90 100 61 -0.3 60 -0.4 59 -0.5 58 0.8 0.9 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 BATTERY RESISTANCE () BATTERY VOLTAGE (V) Fig. 5 Voltage Gain vs Battery Resistance 2.5 0.95 Fig. 6 Voltage Gain vs Battery Voltage 2.0 REGULATOR VOLTAGE (VDC) TOTAL CURRENT (mA) 0.93 1.5 0.91 1.0 0.89 0.5 0.87 0 0.9 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 0.85 0.9 1.1 1.3 1.5 1.7 BATTERY VOLTAGE (V) BATTERY VOLTAGE (V) Fig. 7 Total Current vs Battery Voltage 1000 500 4 Fig. 8 Regulator Voltage vs Battery Voltage RTH = RTH = 200k RTH = 100k RTH = 0k 2 0 CS = 47nF OUTPUT VOLTAGE (mV) 200 100 50 20 10 5 2 0.01 0.1 1.0 -2 RELATIVE OUTPUT (dB) -4 -6 -8 -10 -12 -14 -16 -18 -20 CS = 22nF CS = 10nF CS = 6.8nF 10 100 20 20k INPUT VOLTAGE (mV) FREQUENCY (Hz) Fig. 9 Threshold Adjustment Fig. 10 Frequency Response at Various CS Values 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: Changes to standard packaging information 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. (c) Copyright November 1980 Gennum Corporation. All rights reserved. Printed in Canada. 500 - 32 - 11 4 |
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