Texas Instruments Low-Power, Rail-to-Rail Output, 16-Bit Serial Input DIGITAL-TO-ANALOG CONVERTER PGA2310EVM PGA2310EVM 데이터 시트
제품 코드
PGA2310EVM
PGA2310-EVM
4
SBOU012
PROGRAMMING THE PGA2310
THE DUT PANEL
All controls for the PGA2310 are contained within the DUT
panel (see Figure 2). This section describes the functions
contained within this panel.
panel (see Figure 2). This section describes the functions
contained within this panel.
GAIN CONTROLS
The Gain Controls occupy the bottom half of the DUT panel.
There are three gain sliders for the PGA2310, one each for left
and right channel, and a Gang slider for controlling both left
and right channels simultaneously. When the PGA2310 first
powers up, it will reset to maximum attenuation (or mute). The
software also defaults to maximum attenuation (shown as –Inf
to the right of the sliders). A display to the right of each slider
displays the currently selected gain setting.
There are three gain sliders for the PGA2310, one each for left
and right channel, and a Gang slider for controlling both left
and right channels simultaneously. When the PGA2310 first
powers up, it will reset to maximum attenuation (or mute). The
software also defaults to maximum attenuation (shown as –Inf
to the right of the sliders). A display to the right of each slider
displays the currently selected gain setting.
The Ramp radio buttons to the right of each slider are used to
select the gain slider to be automated when using the Ramp
controls in the upper right-hand corner of the DUT panel.
select the gain slider to be automated when using the Ramp
controls in the upper right-hand corner of the DUT panel.
The Pan slider functions as a Balance control, simulta-
neously gaining one channel while attenuating the other. It
behaves just like the balance control on your home or car
stereo system.
neously gaining one channel while attenuating the other. It
behaves just like the balance control on your home or car
stereo system.
MODE CONTROLS
The Mode control section resides in the upper left-hand
corner of the DUT panel. Several functions are accessible
from this section.
corner of the DUT panel. Several functions are accessible
from this section.
The Zero-Cross Detection checkbox is used to enable and
disable the zero crossing detector circuit inside the PGA2310
device. The default setting is zero crossing detection disabled.
disable the zero crossing detector circuit inside the PGA2310
device. The default setting is zero crossing detection disabled.
The Mute by Pin checkbox is used to enable or disable the
MUTE pin function of the PGA2310. When MUTE is LOW,
the PGA2310 sets both left and right channel attenuation to
maximum (or mute). The default setting is mute disabled.
MUTE pin function of the PGA2310. When MUTE is LOW,
the PGA2310 sets both left and right channel attenuation to
maximum (or mute). The default setting is mute disabled.
Two buttons allow the user to quickly set the gain of both left
and right channels to either 0dB or –Inf dB (or mute). The –Inf
dB button differs from the Mute by Pin checkbox in that it
programs maximum attenuation for both left and right chan-
nels using the PGA2310’s gain control registers, as opposed
to using the MUTE pin.
and right channels to either 0dB or –Inf dB (or mute). The –Inf
dB button differs from the Mute by Pin checkbox in that it
programs maximum attenuation for both left and right chan-
nels using the PGA2310’s gain control registers, as opposed
to using the MUTE pin.
REGISTER LOOPBACK CONTROLS
With the SDO R jumper installed, the user can test the
function of the PGA2310 serial interface by using the Regis-
ter Loopback control. Simply press the Interrogate button to
read back the value being programmed. This function is
included primarily for diagnostics, to ensure that the PC
parallel port and PGA2310 are communicating properly.
function of the PGA2310 serial interface by using the Regis-
ter Loopback control. Simply press the Interrogate button to
read back the value being programmed. This function is
included primarily for diagnostics, to ensure that the PC
parallel port and PGA2310 are communicating properly.
When using the Dual DUT setup, the SDO R jumper should
be installed on the second evaluation module, and left open
circuit on the first evaluation module to ensure proper loop-
back functionality.
be installed on the second evaluation module, and left open
circuit on the first evaluation module to ensure proper loop-
back functionality.
RAMP CONTROLS
The Ramp controls allow automation of the gain settings for
one or both channels. The user enters the top and bottom
points for the ramp, along with the desired step size and
delay between steps. The ramp may be generated from
bottom to top (Ramp Up) or from top to bottom (Ramp Down)
for the given range.
one or both channels. The user enters the top and bottom
points for the ramp, along with the desired step size and
delay between steps. The ramp may be generated from
bottom to top (Ramp Up) or from top to bottom (Ramp Down)
for the given range.
The ramp step size may be set from 0.5dB to 3.0dB in 0.5dB
increments. The ramp step delay may be set using relative
delay settings of 0, 1, 2, 5, 10, 20, or 50.
increments. The ramp step delay may be set using relative
delay settings of 0, 1, 2, 5, 10, 20, or 50.
The channel selection for the automated ramp is selected
using the radio buttons located to the right of the gain sliders
in the Gain Control section of the DUT panel.
using the radio buttons located to the right of the gain sliders
in the Gain Control section of the DUT panel.
DUAL DUT (OR DAISY-CHAIN)
OPERATION
OPERATION
As mentioned previously in this document, the PGA2310
serial interface allows multiple devices to be cascaded, or
daisy-chained, which allows a three-wire control interface to
write the gain settings for all of the devices connected to the
control port. Figure 3 illustrates the daisy-chain connection of
multiple PGA2310 devices.
serial interface allows multiple devices to be cascaded, or
daisy-chained, which allows a three-wire control interface to
write the gain settings for all of the devices connected to the
control port. Figure 3 illustrates the daisy-chain connection of
multiple PGA2310 devices.
FIGURE 3. Daisy-Chain Connection of Multiple PGA2310
Devices.
100k
Ω
100k
Ω
Audio
Input
Audio
Input
Audio
Input
Controller
SDI
SDO
VINL
VINR
SDI
SDO
VINL
VINR
SCLK
VOUTR
CS
VOUTL
SCLK
VOUTR
CS
VOUTL
SDI
SDO
VINL
VINR
SCLK
VOUTR
CS
VOUTL
PGA2310
#1
PGA2310
#2
PGA2310
#N