4320 DEMO-A THAT Corporation, 4320 DEMO-A Datasheet
4320 DEMO-A
Specifications of 4320 DEMO-A
Related parts for 4320 DEMO-A
4320 DEMO-A Summary of contents
Page 1
... Figure 1. THAT4320 equivalent block diagram (QSOP-28 pin assignments shown) 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 © 2009, THAT Corporation; Document 600045 Rev 06 Pre-trimmed Low-voltage Low-power Analog Engine® Dynamics Processor IC APPLICATIONS • ...
Page 2
... Assumes OA is configured for unity gain, & includes offset voltage 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 Page THAT4320 Pre-trimmed Low-voltage Low-power ...
Page 3
... Equivalent Input Noise Current i N(IN) Gain Bandwidth Product GBW Slew Rate SR 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 Page THAT4320 Pre-trimmed Low-voltage Low-power Conditions -20 dB < VCA gain < + µA< i < 100 µ A IN(RMS) ± ...
Page 4
... Open Loop Gain A VOL 5. Note - OA and the V /2 buffer require a capacitve load for stability 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 Page THAT4320 Pre-trimmed Low-voltage Low-power Conditions kΩ L Output ...
Page 5
... Compressor circuit is as shown in Figure 12, Expander circuit is as shown in Figure 13. 7. For best VCA THD performance, QFN thermal pad should not be soldered to the PCB. 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 ...
Page 6
... Figure 2. 4320 Test Circuit Schematic (QSOP-28 pin assignments shown) Figure 3. VCA THD vs. Level gain (BW=22kHz) Figure 5. VCA THD vs. Level at -12 dB gain (BW=22kHz) 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 Page ...
Page 7
... NPNs and PNPs) with unusually low collector-substrate capacitances. The 4320 takes advantage of these devices 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 Page THAT4320 Pre-trimmed Low-voltage Low-power Figure 8 ...
Page 8
... While the 4320’s VCA circuitry is very similar to that of the THAT 2180 Series VCAs, there are several impor- tant differences, as follows. 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 Page ...
Page 9
... THAT has applied for patent coverage on this novel approach. 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 Page THAT4320 Pre-trimmed Low-voltage Low-power 2) The time constant of the 4320’ ...
Page 10
... MHz opamp with moderately low input noise of 10.5 nv/√Hz. This noise floor complements that of the VCA. 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 Page THAT4320 Pre-trimmed Low-voltage Low-power ...
Page 11
... VCA. If the desired gain range +20 dB, the VCA control port must be driven from 0 mV (for 0 dB gain) to +120 mV (for +20 dB gain), but 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 Page THAT4320 Pre-trimmed Low-voltage Low-power only at room temperature ...
Page 12
... OA1 Figure 12. THAT4320 2:1 Encoder Circuit (QSOP-28 pin assignments shown) 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 Page THAT4320 Pre-trimmed Low-voltage Low-power The RMS detector responds accurately over a wide range of levels ...
Page 13
... This is where the input to the RMS detector is derived. The input circuit for the RMS detector includes another pre-emphasis network which provides a maximum pre-emphasis (R 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 Page THAT4320 Pre-trimmed Low-voltage Low-power Applications approximately 2 ...
Page 14
... C13 100n C4 22u Figure 13. THAT4320 2:1 Decoder Circuit (QSOP-28 pin assignments shown) 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 Page THAT4320 Pre-trimmed Low-voltage Low-power and C provide the necessary compensation to maintain 9 stability ...
Page 15
... QSOP 4320Q28-U 24 pin QFN (5x5) 4320N24-U Table 1. Ordering information 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 Page THAT4320 Pre-trimmed Low-voltage Low-power 4320 with only minor variations. Of course, look for more applications information aimed specifically at the 4320 in the future ...
Page 16
... Table 3. QFN-24 (5x5) pin assignments * For best VCA THD performance the QFN’s thermal pad should not be soldered to the PCB. 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 Page THAT4320 Pre-trimmed Low-voltage Low-power ...