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AD7873ACP-REEL7

更新时间： 2024-11-23 12:35:39

品牌	Logo	应用领域
亚德诺 - ADI		消费电路商用集成电路
页数	文件大小	规格书
29页	600K
描述
Touch Screen Digitizer

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中文翻译

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数据手册
替代型号

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AD7873ACP-REEL7 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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AD7873ACP-REEL7 替代型号

型号	品牌	替代类型	描述	数据表
AD7873BRQZ-REEL	ADI	完全替代	Touch Screen Digitizer
AD7873ARQZ-REEL7	ADI	完全替代	Touch Screen Digitizer

与AD7873ACP-REEL7相关器件

型号	品牌	获取价格	描述	数据表
AD7873ACPZ	ADI	获取价格	Touch Screen Digitizer
AD7873ACPZ3	ADI	获取价格	Touch Screen Digitizer
AD7873ACPZ-REEL	ADI	获取价格	Touch Screen Digitizer
AD7873ACPZ-REEL7	ADI	获取价格	Touch Screen Digitizer
AD7873ARQ	ADI	获取价格	Touch Screen Digitizer
AD7873ARQ	ROCHESTER	获取价格	SPECIALTY CONSUMER CIRCUIT, PDSO16, 0.150 INCH, MO-137AB, QSOP-16
AD7873ARQ-REEL	ADI	获取价格	IC SPECIALTY CONSUMER CIRCUIT, PDSO16, 0.150 INCH, MO-137AB, QSOP-16, Consumer IC:Other
AD7873ARQ-REEL7	ROCHESTER	获取价格	SPECIALTY CONSUMER CIRCUIT, PDSO16, 0.150 INCH, MO-137AB, QSOP-16
AD7873ARQZ	ADI	获取价格	Touch Screen Digitizer
AD7873ARQZ-REEL	ADI	获取价格	Touch Screen Digitizer

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