Pre-trimmed Low-voltage Low-power Analog Engine IC THAT 4315 FEATURES APPLICATIONS Pre-trimmed VCA & RMS detector Companding noise reduction Wireless microphones Wide supply voltage range: 4.5V~16V Wireless instrument packs Wireless in-ear monitors Low supply current: 1.6 mA typ. (5V) Battery operated dynamics processors Compressors Wide dynamic range: 118 dB as Limiters compander AGCs De-essers Description The THAT4315 is a single-chip Analog Engine The part was developed specifically for use as a optimized for low-voltage, low-power operation. companding noise reduction system, drawing from Incorporating a high-performance voltage-controlled THATs long history and experience with dbx amplifier (VCA) and RMS-level sensor, the surface technology for noise reduction. However, with 11 mount part is aimed at battery-operated audio appli- active pins, the part is extremely flexible and can be cations such as wireless microphones, wireless configured for a wide range of applications including instruments and in-ear monitors. The 4315 operates single and multi-band companders, compressors, from a single supply voltage down to +4.5Vdc, limiters, AGCs, de-essers, etc. drawing only 1.6mA. What really sets the 4315 apart is the transpar- This IC also works at supply voltages up to ent sound of its Blackmer VCA coupled with its 16Vdc, making it useful in line-operated products as accurate true-RMS level detector. The IC is useful well. The VCA is pre-trimmed at wafer stage to in battery-powered mixers, compressor/limiters, deliver low distortion without further adjustment. ENG devices and other portable audio products. VCA VCA NC IN NC OUT EC- EC+ NC VCC 15 16 14 13 12 11 10 9 VCA OUT IN Ra EC+ EC- THAT 4315 RMS Rb IN OUT CT 1 2 3 4 5 6 7 8 RMS CT NC NC RMS VREF FILT GND IN OUT Figure 1. THAT4315 equivalent block diagram THAT Corporation 45 Sumner Street Milford, MA 01757-1656 USA Tel: +1 508 478 9200 Fax: +1 508 478 0990 Email: info thatcorp.com Web: www.thatcorp.com Copyright 2011, THAT Corporation Document 600065 Rev 05Document 600065 Rev 05 Page 2 of 13 THAT4315 Pre-trimmed Low-voltage Low-power Analog Engine IC 1 SPECIFICATIONS 2 Absolute Maximum Ratings Positive Supply Voltage (V ) +18V Power Dissipation (P ) at T =85 C 400mW CC D A Supply Current (I ) 30mA Input Voltage Supply Voltage CC Operating Temperature Range (T ) -40 to +85 C Storage Temperature Range (T ) -40 to +125 C OP ST Junction Temperature (T ) -40 to +125 C Lead Temperature Range (Soldering, 10 sec) 300 C J Output Short-Circuit Duration 30 sec 3 Electrical Characteristics Parameter Symbol Conditions Min Typ Max Units Power Supply Positive Supply Voltage V Referenced to GND +4.5 +16 V CC Supply Current I No Signal CC V =+5 V 1.6 2.5 mA CC V =+15 V 2.3 3.5 mA CC Voltage Controlled Amplifier (VCA) Max. I/O Signal Current iIN(VCA) + iOUT(VCA) VCC = +5 V 500 Apeak V = +15 V 1 mA CC peak VCA Gain Range -50 +50 dB Gain at 0V Control G E = E = 0V -1.0 0 +1.0 dB 0 C+ C- Gain-Control Constant E /Gain (dB) -40 dB to +40 dB 6.0 mV/dB C+ Gain-Control Tempco EC/ TCHIP Ref TCHIP=27C +0.33 %/C 4 Output Offset Voltage Change V R = 20 k OFF(OUT) OUT 0 dB gain 115 mV +15 dB gain 330 mV +30 dB gain 10 50 mV Output Noise e 0 dB gain N(OUT) 22Hz~22kHz, R =R =20 k -98 -95 dBV IN OUT Total Harmonic Distortion THD V = -5dBV, 1kHz, E = E = 0V 0.07 0.15 % IN C+ C- RMS Level Detector Output Voltage at Reference i e i = 7.5 A RMS -9 0 +9 mV IN O(0) IN Output Error at Input Extremes e i = 200 nA RMS 13 dB O(RMS)error IN iIN = 1 A RMS 13 dB Scale Factor Match to VCA -20 dB < VCA gain < +20 dB 1 A< iIN(RMS) < 100 A .95 1 1.05 Rectifier Balance 7.5 A DC 1 dB IN 1. All specifications are subject to change without notice. 2. 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. 3. Unless otherwise noted, T =25C, V =+5V, V =0 V. A CC EE 4. Reference is to output offset with -80 dB VCA gain. THAT Corporation 45 Sumner Street Milford, MA 01757-1656 USA Tel: +1 508 478 9200 Fax: +1 508 478 0990 Email: info thatcorp.com Web: www.thatcorp.com Copyright 2011, THAT Corporation