Datasheet > AD7147AACBZ-500RL7

AD7147AACBZ-500RL7

更新时间： 2024-10-02 20:03:35

品牌	Logo	应用领域
亚德诺 - ADI		商用集成电路
页数	文件大小	规格书
68页	669K
描述
CapTouch® Programmable Controller for Single-Electrode Capacitance Sensors

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CapTouch Programmable Controller for

Single-Electrode Capacitance Sensors

AD7147A

FUNCTIONAL BLOCK DIAGRAM

FEATURES

GND

BIAS

SHIELD

Programmable capacitance-to-digital converter (CDC)

Femtofarad (fF) resolution

POWER-ON

RESET LOGIC

13 capacitance sensor inputs

CIN0

CIN1

CIN2

CIN3

CIN4

CIN5

CIN6

CIN7

CIN8

CIN9

CIN10

CIN11

CIN12

9 ms update rate, all 13 sensor inputs

No external RC components required

Automatic conversion sequencer

EXCITATION

SOURCE

On-chip automatic calibration logic

Automatic compensation for environmental changes

Automatic adaptive threshold and sensitivity levels

On-chip RAM to store calibration data

Serial peripheral interface (SPI) (AD7147A)

I²C-compatible serial interface (AD7147A-1)

Separate V_DRIVElevel for serial interface

Interrupt output and general-purpose input/output (GPIO)

25-ball, 2.3 mm × 2.1 mm WLCSP

CALIBRATION

AD7147A

RAM

16-BIT

Σ-Δ

CDC

CALIBRATION

ENGINE

CONTROL

AND DATA

REGISTERS

2.6 V to 3.6 V supply voltage

Low operating current

B2 TP

INTERRUPT

AND GPIO

LOGIC

Full power mode: 1 mA

Low power mode: 28.96 μA

SERIAL INTERFACE

AND CONTROL LOGIC

GPIO

DRIVE

APPLICATIONS

SDI SCLK CS

(ADD1)

SDO

(SDA) (ADD0)

INT

Cell phones

NOTES

Personal music and multimedia players

Smart handheld devices

Television, A/V, and remote controls

Gaming consoles

1. PIN NAMES IN PARENTHESES ARE FOR THE AD7147A-1.

Figure 1.

Digital still cameras

The AD7147A is designed for single electrode capacitance

sensors (grounded sensors). There is an active shield output to

minimize noise pickup in the sensor.

GENERAL DESCRIPTION

The AD7147A CapTouch™ controller is designed for use with

capacitance sensors implementing functions such as buttons,

scroll bars, and wheels. The sensors need only one PCB layer,

enabling ultrathin applications.

The AD7147A has on-chip calibration logic to compensate for

changes in the ambient environment. The calibration sequence

is performed automatically and at continuous intervals as long

as the sensors are not touched. This ensures that there are no

false or nonregistering touches on the external sensors due to a

changing environment.

The AD7147A is an integrated CDC with on-chip environmen-

tal calibration. The CDC has 13 inputs channeled through a

switch matrix to a 16-bit, 250 kHz sigma-delta (Σ-Δ) converter.

The CDC is capable of sensing changes in the capacitance of the

external sensors and uses this information to register a sensor

activation. By programming the registers, the user has full control

over the CDC setup.

The AD7147A has an SPI-compatible serial interface, and the

AD7147A-1 has an I²C®-compatible serial interface. Both parts

have an interrupt output, as well as a GPIO. There is a V_DRIVEpin

to set the voltage level for the serial interface independent of V_CC.

The AD7147A is available in a 25-ball, 2.3 mm × 2.1 mm

WLCSP and operates from a 2.6 V to 3.6 V supply. The operating

current consumption in low power mode is typically 28.96 μA

for 13 sensors.

High resolution sensors require minor software to run on the

host processor and may require two PCB layers.

Rev. B

Information furnished by Analog Devices is believed to be accurate and reliable. However, no

responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other

rights of third parties that may result from its use. Specifications subject to change without notice. No

license is granted by implication or otherwise under any patent or patent rights of Analog Devices.

Trademarks and registeredtrademarks arethe property of their respective owners.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Tel: 781.329.4700

Fax: 781.461.3113

www.analog.com

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与AD7147AACBZ-500RL7相关器件

型号	品牌	获取价格	描述	数据表
AD7147AACBZ-RL	ADI	获取价格	CapTouch Programmable Controller
AD7147ACPZ-1500RL7	ADI	获取价格	CapTouch⑩ Programmable Controller for Single-
AD7147ACPZ-1REEL	ROCHESTER	获取价格	SPECIALTY CONSUMER CIRCUIT, QCC24, 4 X 4 MM, ROHS COMPLIANT, MO-220VGGD-8, LFCSP-24
AD7147ACPZ-1REEL	ADI	获取价格	CapTouch⑩ Programmable Controller for Single-
AD7147ACPZ-500RL7	ADI	获取价格	CapTouch⑩ Programmable Controller for Single-
AD7147ACPZ-REEL	ADI	获取价格	CapTouch⑩ Programmable Controller for Single-
AD7147PACPZ-1500R7	ADI	获取价格	CapTouch Programmable Controller
AD7147PACPZ-1RL	ADI	获取价格	CapTouch Programmable Controller
AD7147PACPZ-500R7	ROCHESTER	获取价格	SPECIALTY CONSUMER CIRCUIT, QCC24, 4 X 4 MM, ROHS COMPLIANT, MO-220VGGD-8, LFCSP-24
AD7147PACPZ-500R7	ADI	获取价格	SPECIALTY CONSUMER CIRCUIT, QCC24, 4 X 4 MM, ROHS COMPLIANT, MO-220VGGD-8, LFCSP-24

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