TWL6040

SWCS052B – AUGUST 2010 – REVISED AUGUST 2014

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Stereo speaker path has filterless class-D outputs with 1.5-W capability per channel. Output power

maximization supply connections to an external boost is supported. Speaker drivers also support hearing

aid coil loads. For vibrator and haptic feedback support, the TWL6040 has two PWM channels with

Vibrator drivers are differential H-bridge outputs, enabling fast acceleration and deceleration of vibrator

motor. An external driver for a hearing aid coil or a piezo speaker requiring high voltage can be connected

to line outputs.

The TWL6040 supports three differential microphone inputs (MMIC, HMIC, and SMIC) and a stereo line-

input (AFML, AFMR) multiplexed to two parallel ADCs. The PDM output from the ADCs is transmitted to

the OMAP4 processor through UL0 and UL1. AFML, AFMR inputs can also be looped to analog outputs

(LB0, LB1).

Two LDOs provide a voltage of 2.1 V to bias analog microphones (MBIAS and HBIAS). The maximum

output current is 2 mA for each analog bias, allowing up to two microphones on one bias. Two LDOs

provide a voltage of 1.8 V/1.85 V to bias digital microphones (DBIAS1 and DBIAS2). One bias generator

can bias several digital microphones at the same time, with a total maximum output current of 10 mA.

The TWL6040 has an integrated negative charge pump (NCP) and two LDOs (HS LDO and LS LDO) for

high PSRR. The only external supply needed is 2.1 V, which is available from the 2.1-V DC-DC of the

TWL6030 power-management IC (PMIC) in the OMAP4 system. By powering audio from low-noise 2.1-V

DC-DC of low power consumption, high dynamic range and high output swing at headset output are

achieved. All other supply inputs can be directly connected to battery or system 1.8-V I/O.

Two integrated PLLs enable operation from a 12-, 19.2-, 26-, and 38.4-MHz system clock (MCLK) or, in

LP playback mode, from a 32-kHz sleep clock (CLK32K). The frequency plan is based on a 48-kS/s audio

data rate for all channels, and host processor uses sample-rate converters to interface with different

sample rates (for example, 44.1 kHz). In the specific case of low-power audio playback, the TWL6040

supports the 44.1-kS/s and 48-kS/s rates. Transitions between sample rates or input clocks are seamless.

Accessory plug and unplug detections are supported (PLUGDET). Some headsets have a manual switch

for submitting send/end signal to the terminal through the microphone input pin. This feature is supported

by a periodic accessory button press detection to minimize current consumption in sleep mode. Detection

cycle properties can be programmed according to system requirements.

PART NUMBER

PACKAGE

BODY SIZE (NOM)

TWL6040A2

ZQZ (120)

6.00 mm × 6.00 mm

TWL6040A3

ZQZ (120)

6.00 mm × 6.00 mm

(1)

For more information, see Section 3, Mechanical Packaging and Orderable Information.

2

Device Overview

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