THAT Analog Engine THAT Corporation IC Dynamics Processor THAT 4301, 4301A FEATURES APPLICATIONS High-Performance Voltage Compressors Controlled Amplifier Limiters High-Performance RMS-Level Gates Detector Expanders Three General-Purpose Opamps De-Essers Wide Dynamic Range: >115 dB Duckers Low THD: <0.03% Noise Reduction Systems Low Cost Wide-Range Level Meters DIP & Surface-Mount Packages Description THAT 4301 Dynamics Processor, dubbed crest factors up to 10. One opamp is dedicated THAT Analog Engine, combines in a single IC as a current-to-voltage converter for the VCA, all the active circuitry needed to construct a while the other two may be used for the signal wide range of dynamics processors. The 4301 path or control voltage processing. includes a high-performance, exponen- The combination of exponential VCA gain con- tially-controlled VCA, a log-responding trol and logarithmic detector response deci- RMS-level sensor and three general- purpose bel-linear response simplifies the opamps. mathematics of designing the control paths of The VCA provides two opposing-polarity, volt- dynamics processors. This makes it easy to de- age-sensitive control ports. Dynamic range ex- sign audio compressors, limiters, gates, ex- ceeds 115 dB, and THD is typically 0.003% at 0 panders, de-essers, duckers, noise reduction dB gain. In the 4301A, the VCA is selected for systems and the like. The high level of integra- low THD at extremely high levels. The RMS de- tion ensures excellent temperature tracking be- tector provides accurate rms-to-dc conversion tween the VCA and the detector, while over an 80 dB dynamic range for signals with minimizing the external parts count. 20 pin 30 pin DMP Model 18 17 14 12 11 13 DIPPkg (SO) Pkg VCC 19 SYM - - 4301 IN OUT OA1 OA3 RoHS 4301P20-I 4301M30-I VCA + Compliant + 20 EC- EC+ 15 THAT4301 4301A RoHS 4301AP20-I --- 16 Compliant + RMS 1 IN OUT OA2 - IT CT GND VEE 4301 --- 4301M30 2 5 4 9 10 8 6 7 4301A 4301AP20 --- Figure 1. Block Diagram (pin numbers are for DIP only) Table 1. Ordering Information THAT Corporation 45 Sumner Street Milford, Massachusetts 01757-1656 USA Tel: +1 (508) 478-9200 Fax: +1 (508) 478-0990 Web: www.thatcorp.com Document 600069 Rev. 03 Copyright 2009, THAT CorporationPage 2 Document 600069 Rev 03 1,2 SPECIFICATIONS Absolute Maximum Ratings (T = 25C) A Positive Supply Voltage (V ) +18 V Power Dissipation (P )(T = 75C) 700 mW CC D A Negative Supply Voltage (V ) -18 V Operating Temperature Range (T ) 0 to +70C EE OP Supply Current (I)20mA Storage Temperature Range (T ) -40 to +125C CC ST Overall Electrical Characteristics Parameter Symbol Conditions Min Typ Max Units Positive Supply Voltage V +7 +15 V CC Negative Supply Voltage V -7 -15 V EE Positive Supply Current I 12 18 mA CC Negative Supply Current I -12 -18 mA EE Thermal Resistance SO-Package 140 C/W J-C 3 VCA Electrical Characteristics 4301 4301A Parameter Symbol Conditions Min Typ Max Min Typ Max Units Input Bias Current I No Signal 30 400 30 400 pA B(VCA) Input Offset Voltage V No Signal 4 15 4 15 mV OFF(VCA In) Input Signal Current I or I 175 750 175 750 Arms IN(VCA) OUT(VCA) Gain at 0V Control G E =E = 0.000V -0.4 0.0 +0.4 -0.4 0.0 +0.4 dB 0 C+ C Gain-Control Constant T = 25C (T 55C) A CHIP -60 dB < gain < +40dB E /Gain (dB) E & SYM 6.4 6.5 6.6 6.4 6.5 6.6 mV/dB C+ C+ E /Gain (dB) E -6.4 -6.5 -6.6 -6.4 -6.5 -6.6 mV/dB C- C- Gain-Control TempCo E / T Ref T = 27C +0.33 +0.33 %/C C CHIP CHIP Gain-Control Linearity -60 to +40 dB gain 0.5 2 0.5 2 % Off Isolation E =SYM=-375mV, E =+375mV 110 115 110 115 dB C+ C- Output Offset Voltage Change V R = 20k OFF(OUT) out 0 dB gain 1 3 1 3 mV +15 dB gain 2 10 2 10 mV +30 dB gain 5 25 5 25 mV Gain Cell Idling Current I 20 20 A IDLE Output Noise e 20 Hz-20 kHz n(OUT) R = 20k out 0 dB gain -96 -94 -96 -94 dBV +15 dB gain -85 -83 -85 -83 dBV Total Harmonic Distortion THD V = 0 dBV, 1 kHz IN 0 dB gain 0.003 0.007 0.003 0.007 % 1. All specifications subject to change without notice. 2. Unless otherwise noted, T =25C, V = +15V, V = -15V VCA adjusted for min THD 1V,1 kHz, 0 dB gain. A CC EE SYM 3. Test circuit is the VCA section only from Figure 2. THAT Corporation 45 Sumner Street Milford, Massachusetts 01757-1656 USA Tel: +1 (508) 478-9200 Fax: +1 (508) 478-0990 Web: www.thatcorp.com Copyright 2009, THAT Corporation