Pre-trimmed Analog Engine Dynamics Processor IC THAT 4305 FEATURES APPLICATIONS Compressors & Limiters y Pre-trimmed Blackmer VCA & RMS-level detector y Gates & Expanders y AGCs y Wide supply voltage range: 4.5V ~ 16V y Line-operated dynamics processors y De-Essers y Low supply current: y Duckers 3.5 mA typ. (15V) y Mixers y Wide dynamic range: y Level indicators 117 dB (VCA) y Companding noise reduction systems 60 dB (RMS-level detector) Description The THAT4305 is a single-chip Analog Engine The 4305 was developed specifically for use in optimized for low-cost applications. It incorporates a low-cost dynamics processors, drawing from THAT s high-performance Blackmer voltage-controlled long history and experience with such designs. Both amplifier (VCA) and log-responding RMS-level VCA control ports and the detector input and output sensor. The VCA and RMS detector are pre-trimmed are available for the designer to connect as s/he sees at wafer stage to deliver low distortion without fit. As a result, the part is extremely flexible and can further adjustment. be configured for a wide range of applications includ- ing single- and multi-band companders, digital Available in a small (QSOP) surface-mount overload protectors, voltage-controlled faders, level package, the 4305 is aimed at line-operated audio indicators, etc. applications such as compressor/limiters, gates, and other dynamic processors. The part normally What really sets the 4305 apart from other operates from a split supply voltage up to 16Vdc, manufacturers offerings is the transparent sound of drawing only 3.5mA at 15V. This IC also works at its Blackmer VCA, coupled with its accurate true- supply voltages as low as 4.5V, making it useful in RMS level detector. This makes the IC useful in a some battery-operated products as well. wide range of analog audio products. Pin Name Pin Number No Connection 1 VCA VCA IN OUT NC NC EC- EC+ NC VCC RMS IN 2 No Connection 3 16 15 14 13 12 11 10 9 CTIME 4 RMS OUT 5 GND 6 VCA IN OUT No Connection 7 EC+ EC- Vee 8 Vcc 9 No Connection 10 EC+ 11 EC- 12 RMS IN OUT VCA OUT 13 CT No Connection 14 VCA IN 15 No Connection 16 1 2 3 4 5 6 7 8 Table 2. Pin assignments NC RMS NC CT RMS GND NC VEE IN OUT Package Order Number 16 pin QSOP 4305Q16-U Figure 1. THAT 4305 equivalent block diagram Table 1. Ordering information THAT Corporation 45 Sumner Street Milford, MA 01757-1656 USA Tel: +1 508 478 9200 Fax: +1 508 478 0990 Web: www.thatcorp.com Copyright 2015, THAT Corporation Document 600067 Rev 02Document 600067 Rev 02 Page 2 of 20 THAT4305 Pre-trimmed Analog Engine Dynamics Prcoessor IC SPECIFICATIONS 1 Absolute Maximum Ratings Operating Temperature Range (T ) -40 to +85 C Supply Voltages (V , V ) 18V OP CC EE Junction Temperature (T ) -40 to +125 C VCA Control Voltage 0.6 V J Power Dissipation (P ) at T =85 C 400mW Storage Temperature Range (T ) -40 to +125 C D A ST 2 Electrical Characteristics Parameter Symbol Conditions Min Typ Max Units Power Supply Positive Supply Voltage V Referenced to GND +4.5 - +16 V CC Negative Supply Voltage V Referenced to GND -4.5 - -16 V EE Supply Current No Signal I V =+15V, V = -15V 3.5 5 mA CC CC EE I V =+15V, V = -15V -3.5 -5 mA EE CC EE I V =+5V, V = -5V 2 mA CC CC EE IEE VCC=+5V, VEE= -5V -2 mA Voltage Controlled Amplifier (VCA) Max. I/O Signal Current i + i 1.8 mA IN(VCA) OUT(VCA) peak VCA Gain Range -60 +60 dB Gain at 0V Control G E = E = 0V -1.0 0 +1.0 dB 0 C+ C- Gain-Control Constant E /Gain (dB) -60 dB < gain < +60 dB - 6.2 - mV/dB C+ Gain-Control Tempco E /T Ref T =27C - +0.33 - %/C C CHIP CHIP 3 Output Offset Voltage Change V R = 20 k OFF(OUT) OUT 0 dB gain - 1 15 mV +15 dB gain - 3 30 mV +30 dB gain - 10 50 mV Output Noise e 0 dB gain N(OUT) 22Hz~22kHz, RIN=ROUT=20 k - -97.5 -95 dBV Total Harmonic Distortion THD V = -5dBV, 1kHz, E = E = 0V 0.07 0.15 % IN C+ C- RMS Level Detector Output Voltage at Reference iIN eO(0) iIN = 7.5 A RMS -9 0 +9 mV Output Error at Input Extremes e i = 200 nA RMS 1 3 dB O(RMS)error IN iIN = 200 A RMS 1 3 dB Scale Factor Match to VCA -20 dB < VCA gain < +20 dB 1 a< i < 100 A .95 1 1.05 - IN(RMS) 1. If the devices are subjected to stress above the Absolute Maximum Ratings, permanent damage may result. Sustained operation at or near the Absolute Maximum Ratings conditions is not recommended. In particular, like all semiconductor devices, device reliability declines as operating temperature increases. 2. Unless otherwise noted, TA=25C, VCC=+15V, VEE= -15V. 3. Reference is to output offset with -60 dB VCA gain. THAT Corporation 45 Sumner Street Milford, MA 01757-1656 USA Tel: +1 508 478 9200 Fax: +1 508 478 0990 Web: www.thatcorp.com Copyright 2015, THAT Corporation All rights reserved.