Pre-Trimmed, Very Low-Voltage Low-Power Analog Engine IC THAT 4316 FEATURES APPLICATIONS Pre-trimmed VCA and RMS detector Companding noise reduction Wireless microphones Very low supply voltage: 2.7V - 5.5V Wireless instrument packs Wireless in-ear monitors Low supply current: 1.2mA typ. (3.3V) Battery operated dynamics processors Compressors Internal Vcc/2 divider and buffer Limiters Wide dynamic range: 115dB as Noise Gates compander AGCs Description The THAT4316 is a single-chip Analog Engine companding applications as well as sound optimized for very low-voltage, low-power operation. mod-ifiers. This makes the 4316 ideal for many low- It incorporates a high-performance class-AB voltage- power dynamics processors including compressors, limiters, and gates. controlled amplifier (VCA) and true-RMS-responding level detector. The 16-pin QSOP part is aimed at The part was developed as a versatile analog battery-operated audio applications including com- engine, drawing from THATs long history and expe- panding systems for wireless microphones, wireless rience with such applications. Because both VCA instruments, and in-ear monitors, as well as dynam- control ports and the RMS level detector output are ics processors of all types. The 4316 operates from a independently available, the part is extremely flexible. It can be configured for a wide range of single supply voltage down to 2.7V, drawing only applications including single and multi-band com- 1.2mA at 3.3V. panders with a wide range of companding ratios, The 4316 s true-RMS-level detector improves the plus compressors, expanders, limiters, AGCs, de- sound of the part over averaging or peak detectors in essers, and the like. VCA VCA NC NC EC- EC+ NC VCC IN OUT 16 15 14 13 12 11 10 9 VCA IN OUT R A EC+ EC- THAT 4316 RMS R B IN OUT CT 2 1 3 4 5 6 7 8 RMS CT NC NC RMS VREF FILT GND IN OUT Figure 1. THAT4316 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 2012, THAT Corporation Document 600177 Rev 00Document 600177 Rev 00 Page 2 of 20 THAT4316 Pre-Trimmed, Very Low-Voltage Low-Power Analog Engine IC 1 SPECIFICATIONS 2 Absolute Maximum Ratings Positive Supply Voltage (V ) +6.0V Vref Output Short-Circuit Duration 30 sec CC Supply Current (I )10 mA Operating Temperature Range (T ) -40 to +85 C CC OP I/O Pin Voltage Supply Voltage Junction Temperature (T ) -40 to +125 C J Ec+, Ec- to Vref Voltage 1V Storage Temperature Range (T ) -40 to +125 C ST 3, 4 Electrical Characteristics Parameter Symbol Conditions Min Typ Max Units Power Supply Positive Supply Voltage V Referenced to GND +2.7 3.3 +5.5 V CC Supply Current I No Signal CC V =+3.3 V 1.2 1.8 mA CC V =+5 V 1.3 2.0 mA CC 3 Voltage Controlled Amplifier (VCA) Max. I/O Signal Current i + i V = +3.3 V 1200 A IN(VCA) OUT(VCA) CC peak V = +5 V 1600 A CC peak VCA Gain Range E or E used singly -50 +50 dB C+ C- Gain at 0V Control G E = E = V -1.5 0 +1.5 dB 0 C+ C- REF Gain-Control Constant E /Gain (dB) -40 dB to +40 dB 6.1 mV/dB C Gain-Control Tempco E /T Ref T =27C +0.33 %/C C CHIP CHIP 4 Output Offset Voltage Change V R = 4.7k OFF(OUT) 2 0 dB gain 315 mV +15 dB gain 630 mV Output Noise e 0 dB gain N(OUT) 22Hz~22kHz, R =R =4.7 k -95 -93 dBV 1 2 Total Harmonic Distortion THD 1kHz 0dB (V = -10dBV), E = E = Vcc/2 0.03 0.15 % IN C+ C- Maximum VCA Control Voltage E ,E Ref: V -500 500 mV c- c+ REF VCA Control Port Input Impedance EC+, EC- 400 500 600 5 Source Impedance at VCA Input Frequency > 320 kHz 2.5 k 1. All specifications are subject to change without notice. 2. If the device is 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, TA=25C, VCC=+3.3V. 4. See Figure 13 for component references. 4. Reference is to output offset with approximately -40 dB VCA gain. 5. Refer to the text in item 4 of the 4316 and 2182 comparison on page 6. 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 2012, THAT Corporation