AD7873BRQZ

更新时间： 2024-11-23 12:35:39

品牌	Logo	应用领域
亚德诺 - ADI		/
页数	文件大小	规格书
29页	600K
描述
Touch Screen Digitizer

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数据手册
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AD7873BRQZ 数据手册

Touch Screen Digitizer

Data Sheet

AD7873

FEATURES

4-wire touch screen interface

FUNCTIONAL BLOCK DIAGRAM

PENIRQ

On-chip temperature sensor: −40°C to +85°C

On-chip 2.5 V reference

Direct battery measurement (0 V to 6 V)

Touch pressure measurement

PEN

INTERRUPT

TEMP

SENSOR

X+

X–

Specified throughput rate of 125 kSPS

Single supply, V_CCof 2.2 V to 5.25 V

Ratiometric conversion

High speed serial interface

Programmable 8-bit or 12-bit resolution

One auxiliary analog input

AD7873

Y+

Y–

T/H

6-TO-1

I/P

MUX

AUX

COMP

BATTERY

MONITOR

Shutdown mode: 1 µA maximum

16-lead QSOP, TSSOP, and LFCSP packages

BAT

APPLICATIONS

REF

GND

Personal digital assistants

Smart hand-held devices

Touch screen monitors

Point-of-sale terminals

Pagers

CHARGE

REDISTRIBUTION

DAC

2.5V

REF

BUF

SAR + ADC

CONTROL LOGIC

GENERAL DESCRIPTION

The AD7873 is a 12-bit successive approximation ADC with a

synchronous serial interface and low on resistance switches for

driving touch screens. The AD7873 operates from a single 2.2 V

to 5.25 V supply, with a throughput rate of 125 kSPS.

SPORT

The AD7873 features direct battery measurement, temperature

measurement, and touch pressure measurement. The AD7873

also has an on-board reference of 2.5 V that can be used for the

auxiliary input, battery monitor, and temperature measurement

modes. When not in use, the internal reference can be shut

down to conserve power. An external reference can also be

applied and varied from 1 V to V_CCwith an analog input range

from 0 V to V_REF. The device includes a shutdown mode that

reduces the current consumption to less than 1 µA.

DIN

DOUT

DCLK

BUSY

Figure 1.

PRODUCT HIGHLIGHTS

1. Ratiometric conversion mode available, eliminating errors

due to on-board switch resistances.

2. On-board temperature sensor: −40°C to +85°C.

3. Battery monitor input.

4. Touch pressure measurement capability.

The AD7873 features on-board switches. This, coupled with low

power and high speed operation, makes the device ideal for

battery-powered systems with resistive touch screens. The part

is available in a 16-lead, 0.15 inch quarter size outline package

(QSOP), a 16-lead, thin shrink small outline package (TSSOP),

and a 16-lead, lead frame chip scale package (LFCSP).

5. Low power consumption of 1.37 mW maximum with the

reference off, or 2.41 mW typical with the reference on, at

125 kSPS and V_CCat 3.6 V.

6. Package options include 4 mm × 4 mm LFCSP.

7. Analog input range from 0 V to V_REF

8. Versatile serial I/O ports.

Rev. F

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 registered trademarks are the 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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中文翻译

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AD7873BRQZ 替代型号

型号	品牌	替代类型	描述	数据表
AD7873ARQZ	ADI	类似代替	Touch Screen Digitizer

与AD7873BRQZ相关器件

型号	品牌	获取价格	描述	数据表
AD7873BRQZ-REEL	ADI	获取价格	Touch Screen Digitizer
AD7873BRQZ-REEL7	ADI	获取价格	Touch Screen Digitizer
AD7874	ADI	获取价格	LC2MOS 4-Channel, 12-Bit Simultaneous Sampling Data Acquisition System
AD7874AN	ADI	获取价格	LC2MOS 4-Channel, 12-Bit Simultaneous Sampling Data Acquisition System
AD7874ANZ	ROCHESTER	获取价格	4-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, PARALLEL ACCESS, PDIP28, 0.600 INCH, PLASTIC, DI
AD7874AQ	ADI	获取价格	LC2MOS 4-Channel, 12-Bit Simultaneous Sampling Data Acquisition System
AD7874AR	ROCHESTER	获取价格	4-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, PARALLEL ACCESS, PDSO28, SOIC-28
AD7874AR	ADI	获取价格	LC2MOS 4-Channel, 12-Bit Simultaneous Sampling Data Acquisition System
AD7874ARZ	ROCHESTER	获取价格	4-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, PARALLEL ACCESS, PDSO28, SOIC-28
AD7874ARZ-REEL	ROCHESTER	获取价格	4-CH 12-BIT SUCCESSIVE APPROXIMATION ADC, PARALLEL ACCESS, PDSO28, SOIC-28

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