UNISONIC TECHNOLOGIES CO., LTD L3305 LINEAR INTEGRATED CIRCUIT LOW VOLTAGE CLASS B AMPLIFIER SOP-14 DESCRIPTION The UTC L3305 can be operated as a class B amplifier. It can also operated as a medium power "vari-bias" class A amplifier. It include a preamplifier with adjustable gain and a power amplifier. FEATURES TSSOP-14 * Low Operating Voltage range (1V～3V) * Low Operating current consumption * Feedback stabilized gain less than 80 dB * Output power exceeds 140 dBSPL *Pb-free plating product number: L3305L ORDERING INFORMATION Ordering Number Normal Lead Free Plating L3305-S14-R L3305L-S14-R L3305-S14-T L3305L-S14-T L3305-P14-R L3305L-P14-R L3305-P14-T L3305L-P14-T Package Packing SOP-14 SOP-14 TSSOP-14 TSSOP-14 Tape Reel Tube Tape Reel Tube L3305L-S14-T (1)Packing Type (2)Package Type (3)Lead Plating www.unisonic.com.tw Copyright © 2005 Unisonic Technologies Co., Ltd (1) R: Tape Reel, T: Tube (2) S14: SOP-14, P14: TSSOP-14 (3) L: Lead Free Plating, Blank: Pb/Sn 1 of 6 QW-R107-052,A L3305 LINEAR INTEGRATED CIRCUIT PIN CONFIGURATION OUTPUT STAGE I /P 1 14 CURRENT TRIM DEC A 2 13 DEC B OUTPUT A 3 12 OUTPUT B O/P GND 4 11 VCC2 MIC BIAS 5 10 VCC1 PREAMP I/P 6 9 FEEDBACK PREAMP GND 7 8 PREAMP O/P UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 2 of 6 QW-R107-052,A L3305 LINEAR INTEGRATED CIRCUIT BLOCK DIAGRAM VCC2 CURRENT OUTPUT A TRIM 11 MIC 5 BIAS 14 3 OUTPUT B 12 2.2k 470Ω VCC1 10 4 O/P GND FEEDBACK 9 13 DEC B OUTPUT STAGE PREAMP 6 I/P 2 DEC A PREAMP 7 8 1 PREAMP GND PREAMP O/P OUTPUT STAGE I/P UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 3 of 6 QW-R107-052,A L3305 LINEAR INTEGRATED CIRCUIT ABSOLUTE MAXIMUM RATINGS PARAMETER SYMBOL RATINGS Supply Voltage Vcc1 3 Power Dissipation PD 200 Operating Temperature Range TOPR -10 ~ +60 Storage Temperature Range TSTG -20 ~ +70 Note Absolute maximum ratings are those values beyond which the device could be permanently damaged. Absolute maximum ratings are stress ratings only and functional device operation is not implied. UNIT V mW ℃ ℃ ELECTRICAL CHARACTERISTICS PARAMETER Input Referred Noise Total Current Voltage Gain Total Harmonic Distortion & Noise Gain Dependence on RB Input Impedance of Output Amplifier Stable with Battery Resistance Frequency Response (-3 dB at 1 kHz) SYMBOL TEST CONDITIONS eN ITOT GV Output = 0.707 VRMS THD Output = 0.707 VRMS ZIN MIN 72 18 Low High TYP 0.9 0.7 75 1.5 0.02 27 MAX 2.5 1.2 78 3.0 36 22 250 12 UNIT µV mA dB % dB/Ω kΩ Ω Hz kHz Note: 1. All parameters tested in Test Circuit Fig. 1. 2. Conditions: Supply voltage VB= 1.3 VDC, Temperature ambient = 25℃, Frequency = 1kHz, Noise Filter Bandwidth at 12 dB/oct (0.2 to 10kHz) UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 4 of 6 QW-R107-052,A L3305 LINEAR INTEGRATED CIRCUIT TEST CURICT VB = 1.30 VDC 10μ 10μ 820 VI 0.1μ 20k RIN 3.9k 220 14 2 13 3 12 RB 4.7 10μ VO 4 11 UTC L3305 5 10 RF 200k 0.1μ 6 9 7 8 R L= 470Ω 0.1μ N/C 1kHz 1 N/C 10μ 10μ HAMMOND 99966 VC 10k 0.1μ 0.1μ Note: 1. Test Circuit Amplifier Gain = 20 Log10 ( VOUT / VIN ) + 40dB RF 2. Preamp Gain = set at 35dB RIN Fig. 1 Test Circuit 6.8μ 1 14 2 13 3 12 4 10μ MIC 0.1μ UTC L3305 N/C 6.8μ 0.1μ Receiver 400Ω Impedance 11 5 10 6 9 7 8 VB = 1.30 VDC 10μ N/C 220k 10k 0.1μ 0.1μ 0.1μ Fig. 2 Typical Hearing Aid Circuit UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 5 of 6 QW-R107-052,A L3305 LINEAR INTEGRATED CIRCUIT UTC assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all UTC products described or contained herein. UTC products are not designed for use in life support appliances, devices or systems where malfunction of these products can be reasonably expected to result in personal injury. Reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. The information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice. UNISONIC TECHNOLOGIES CO., LTD www.unisonic.com.tw 6 of 6 QW-R107-052,A