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TDA1566 Fiches technique(PDF) 8 Page - NXP Semiconductors |
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TDA1566 Fiches technique(HTML) 8 Page - NXP Semiconductors |
8 / 46 page TDA1566_2 © NXP B.V. 2007. All rights reserved. Product data sheet Rev. 02 — 20 August 2007 8 of 46 NXP Semiconductors TDA1566 I2C-bus controlled dual channel/single channel amplifier 6.1.2 Gain selection The TDA1566 features a 16 dB and a 26 dB gain setting. The 16 dB setting is referred to as line driver mode, the 26 dB setting is referred to as amplifier mode. Table 6 shows how the gain is selected. [1] Channel 1. [2] Channel 2. [3] Both channels. 6.1.2.1 I2C-bus mode The gain is selected with IB3[D6] for channel 1 and IB3[D5] for channel 2. If the gain select is performed when the amplifier is muted, the gain select will be pop free. See Section 6.4.2 for the definition of the instruction bytes. If DC load detection is used, IB1[D1] = 1, auto gain select is activated. Detection of an open load (see Section 6.2.1) will result in a line driver mode setting. If the load detection data is invalid, IB3[D5] and IB3[D6] will define the gain setting. 6.1.2.2 Non-I2C-bus mode The gain for channel 1 and channel 2 is selected with the PROG pin. Leaving the pin unconnected selects 26 dB gain and connecting a resistor of 1500 Ω between the PROG pin and GND selects 16 dB gain. When the amplifier is used in line driver mode loads of 2 Ω and 4 Ω can be driven. With a load larger than 25 Ω a Zobel network of 33 nF in series with 22 Ω should be connected between the amplifier output terminals. The Zobel network should be placed close to the output pins. To prevent instability in 1 Ω mode the amplifier must not be used in line driver mode with a load larger than 25 Ω. Fig 5. Enable pin mode switching in I2C-bus and non-I2C-bus mode 001aad008 0 V 1.0 V 2.6 V 4.5 V 6.5 V VP 0 V 1.0 V 2.6 V VP non-I2C-bus mode I2C-bus mode mute operating off off operation mode defined by IB1[D0] and IB2[D0] Table 6. Gain select in I2C-bus and non-I2C-bus mode Gain select 16 dB 26 dB I2C-bus IB3[D6] = 1 IB3[D6] = 0[1] IB3[D5] = 1 IB3[D5] = 0[2] Non-I2C-bus PROG connected with 1.5 k Ω to GND PROG open[3] |
Numéro de pièce similaire - TDA1566 |
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Description similaire - TDA1566 |
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