www.ti.com
2.2 Power Up
3 Reference
Reference
Table 1. Gain Settings
Amplifier Gain Setting (typ)
GAIN1
(1)
GAIN0
(1)
V/V dB
0 0 2 6
0 1 4 12
1 0 8 18
1 1 16 24
(1)
0 = Jumper installed, 1 = Jumper not installed
2.1.2.3 Shutdown Controls
1. The TPA2012D2 provides independent shutdown controls so that each channel can be controlledseparately. The shutdown pins, SDL and SDR, are active low. This means that a low voltage (ground)on this pin places the appropriate channel in shutdown mode. Using the pushbuttons provided on theEVM, the TPA2012D2 can be placed in shutdown by pressing and holding the button(s) down. Bothbuttons must be depressed in order for both channels of the TPA2012D2 to turn off. When the buttonsare released, the appropriate channel on the device restarts.2. The jumper J1 can be used to tie SDL and SDR signals together. With jumper J1 installed, bothchannels can be placed in shutdown by pressing either SDL or SDR. This is the default configurationof the EVM.
1. Verify the correct connections as described in Sections 2.1.1 and 2.1.2.2. Verify the voltage setting of the power supply is between 2.5 V and 5.5 V and turn ON the powersupply. Proper operation of the EVM should begin.3. Adjust the audio signal source as needed.
This section includes the EVM schematic, parts list, and board layout reference.
TPA2012D2 Audio Power Amplifier Evaluation ModuleSLOU174A – February 2005 – Revised April 2005 3