that4315 THAT Corporation, that4315 Datasheet
that4315
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that4315 Summary of contents
Page 1
... Pre-trimmed VCA & RMS detector · Wide supply voltage range: 4.5V~16V · Low supply current: 1.6 mA typ. (5V) · Wide dynamic range: 118 dB as compander The THAT4315 is a single-chip Analog En- gine ® optimized for low-voltage, low-power oper- ation. Incorporating a high-performance voltage- controlled amplifier (VCA) and RMS-level sensor, ...
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... RMS 200 uA RMS IN -20 dB < VCA gain < + ma< i < 100 mA IN(RMS) ±7.5mA Copyright © 2009, THAT Corporation THAT4315 Pre-trimmed Low-voltage Low-power Analog Engine® =85 ºC 400mW D A Supply Voltage ) -40 to +125 ºC ST 300 ºC 2 ...
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... For details of the theory of operation of the VCA and RMS Detector building blocks, the interested THAT Corporation; 45 Sumner Street; Milford, Massachusetts 01757-1656; USA Tel: +1 508 478 9200; Fax: +1 508 478 0990; Web: www.thatcorp.com Conditions º ...
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... Note that result of the mathematics of RMS detection, the at- tack and release time constants are fixed in their re- lationship to each other. Copyright © 2009, THAT Corporation THAT4315 Pre-trimmed Low-voltage Low-power Analog Engine® resistor, R24 in Figure 2, is REF ...
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... However the 2252, the level match will be affected by any addi- tional currents drawn from the C pin. T THAT Corporation; 45 Sumner Street; Milford, Massachusetts 01757-1656; USA Tel: +1 508 478 9200; Fax: +1 508 478 0990; Web: www.thatcorp.com V /2 Reference Buffer CC ...
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... For the decoder shown in Figure 3, we can state that Out Out + + L.M. Figure 3. Feedforward expander. Copyright © 2009, THAT Corporation THAT4315 Pre-trimmed Low-voltage Low-power Analog Engine® IC Furthermore, much Out ) - + ( . . ) × - × Out ...
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... This requirement applies to the decoder and other applications of the THAT4315 as well. The output of the RMS detector is zero volts when the RMS input current is equal to the timing current (internally set to ~7.5 mA). A low-frequency voltage level of -28.5 dBV was chosen as the desired zero dB reference. The RMS detector’ ...
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... Figure 5. 4315 Typical Application Circuit - 1:2 Expander The decoder Figure 5 shows the THAT4315 configured as a 2:1 expander, an arrangement intended to comple- ment the encoder in Figure 4. This circuit is opti- mized for low-voltage operation, as might be the case for a decoder in an in-ear monitoring system which will run from battery power. ...
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... R11 R12 482k 1k15 U3B THAT4315 R10 RMS RMS Out 2k49 U3A C14 C13 THAT4315 10u 10u 11 EC+ C11 R8 15 VCA In VCA Out 133k 1u EC- R13 5k 12 C21 6 9 220p Vref Vcc Filt Gnd 7 8 C16 22u Figure 7 ...
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... EC- 12 U3D 12 14 Op-Amp U3C Op-Amp Vcc R5 2k0 C4 R6 10u 2k0 Vref Vref Figure 8. 3:1 Encoder circuit Copyright © 2009, THAT Corporation THAT4315 Pre-trimmed Low-voltage Low-power Analog Engine® IC × × 22p R3 200k U3B ...
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... Table 3 shows the transfer characteristics of this companding system. As before, the columns labeled Copyright © 2009, THAT Corporation Page 11 C21 R15 1k1 10n R7 U4A 10k0 C14 THAT4315 22p 13 Decode Out 9 VCA Out 8 10 U6C 12 V+ Op-Amp 6 9 U4C Vcc ...
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... Package Information The THAT 4315 is available in a 16-pin QSOP package as shown in Figure 10. Copyright © 2009, THAT Corporation THAT4315 Pre-trimmed Low-voltage Low-power Analog Engine® ...