TAS5721 datasheet(4/71 Pages) TI1

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TAS5721

SLOS739 – JULY 2012

www.ti.com

Pin Out (continued)

DR_OUTx

8, 9

Output for channel A or B of headphone amplifier or line driver

DR_SD

Places the headphone amplifier/line driver in shutdown when pulled low.

DR_VSS

Negative supply generated by charge pump for ground centered

headphone and line driver output

DRVDD

Power supply for internal headphone and line driver circuitry

DVDD

Power supply for the internal digital circuitry

DVDD_REG

Voltage regulator derived from DVDD supply(3)

GVDD_REG

Voltage regulator derived from PVDD supply(3)

LRCLK

Pulldown

Word select clock for the digital signal that is active on the input data line of

the serial port

MCLK

Pulldown

Master clock used for internal clock tree and sub-circuit and state machine

clocking

Not connected inside the device (all no connect terminals should be

connected to ground)

OSC_GND

Ground reference for oscillator circuitry (this terminal should be connected

to the system ground)

OSC_RES

Connection point for oscillator trim resistor

PDN

Pullup

Quick powerdown of the device that is used upon an unexpected loss of

PVDD or DVDD power supply in order to quickly transition the outputs of

the speaker amplifier to a 50/50 duty cycle. This quick powerdown feature

avoids the audible anamolies that would occur as a result of loss of either

of the supplies. If this pin is used to place the device into quick powerdown

mode, the RST pin of the device must be toggled before the device is

brought out of quick powerdown.

PGND

Ground reference for power device circuitry(4)

PLL_FLTM

AI/AO

Negative connection point for the PLL loop filter components

PLL_FLTP

AI/AO

Positive connection point for the PLL loop filter components

PLL_GND

Ground reference for PLL circuitry (this terminal should be connected to the

system ground)

PowerPAD

Thermal and ground pad thatprovides both an electrical connection to the

ground plane and a thermal path to the PCB for heat dissipation. This pad

must be grounded to the system ground.

PVDD

4, 41

Power supply for internal power circuitry

RST

Pullup

Places the device in reset when pulled low

SCL

I2C serial control port clock

SCLK

Pulldown

Bit clock for the digital signal that is active on the input data line of the

serial data port

SDA

DI/DO

I2C serial control port data

SDIN

Pulldown

Data line to the serial data port

SPK_OUTx

2, 43, 45,

Speaker amplifier outputs

SSTIMER

Connection point for the capacitor that is used by the ramp timing circuit,

as described in Output Mode and MUX Selection

TEST1

Used by TI for testing during device production (this terminal must be left

floating)

TEST2

Used by TI for testing during device production (this terminal must be left

floating)

TEST3

Used by TI for testing during device production (this terminal must be

connected to GND)

(4)

This terminal should be connected to the system ground

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