TS2A116E Datasheet, PDF (1/5 Pages) Texas Instruments – Audio Accessory Communicator and Authentication IC

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TS2A116E
SCDS355 – MAY 2014
TS2A116E Audio Accessory Communicator and Authentication IC
1 Features
•1 Single-Wire Communication Protocol by way of a
Single Contact Serial Interface
• Designed to Work with a Self-Charged Capacitor
from the Microphone Bias Voltage
• Supports 6-Bit Accessory ID to Differentiate up to
63 Different Accessory Types
• Supports 3 Remote Control Bottoms
• Baud Rate Supports 38.4K
• Backward Compatible for Microphone and
Play or Pause Key Functions
• Current Consumption <80 µA During Single-Wire
Transmission and Idle
• 12-Pin Ultra Thin UQFN Package
(2.0 × 1.7 mm, 0.4 mm pitch)
• ESD Performance:
– 2 kV Human Body Model (A114B, Class II)
– 500 V Charged Device Model (C101)
– ±8-kV Contact Discharge for DATA and KEY1,
KEY2, and KEY3 Pins (IEC 61000-4-2)
2 Applications
Headset Accessory with Remote Control Buttons
3 Description
The TS2A116E device is designed for use with
advanced headset accessories where a special
single-wire communication is used to identify the
accessory and its remote control key presses.
Communication with the host device is based on
standard UART protocol to send and receive data,
and it relies on the same microphone line used by the
accessory. This special technique enables the
customer to establish the proprietary headset
solution; thus, differentiating itself from the rest of the
market.
The TS2A116E device is pre-programmed with an
accessory IDs (AID); combined with the special
communication single-wire protocol, this device
allows the phone to uniquely detect the accessory.
The TS2A116E device also supports up to 3 remote
control keys and utilizes similar single-wire
communication to the host chip for any key press
information. It is also backward compatible to support
the traditional microphone play and pause key
functions that do not employ the single-wire
communication scheme.
The TS2A116E device is designed to operate from an
external self-charged capacitor which replenishes its
charge from the microphone bias voltage. No external
power supply is required. The TS2A116E device is
configured to operate using standard 38.4 kbps baud
rate UART protocol. It consumes maximum operating
current of <80 µA during single-wire transmission or
during the idle state to minimize power consumption.
The device is designed with an ultra thin
2.0 x 1.7 mm UQFN package.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TS2A116E
UQFN (12)
2.00 mm × 1.70 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
4 Application Diagram
Mobile Device
Accessory
MIC_BIAS
R1
C1
MIC_IN ^MIC_IN
Audio Codec
L RGM
UART TX
UART RX
Application
Processor
VREF
Comparator
Level
Shifter
MIC_ DATA
TS2A116E
R2
DATA
SW1
VDD
SW2
180Ω
SW3
360Ω
Cext
GND
C5
C4
GND
C2
R3 R4
MEMS
Microphone
C3
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCT PREVIEW Information. Product in design phase of
development. Subject to change or discontinuance without notice.