Datasheet > AD8555ACP-R2

AD8555ACP-R2

更新时间： 2024-11-23 22:26:19

品牌	Logo	应用领域
亚德诺 - ADI		传感器放大器
页数	文件大小	规格书
28页	503K
描述
Zero-Drift, Digitally Programmable Sensor Signal Amplifier

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AD8555ACP-R2 数据手册

Zero-Drift, Digitally Programmable

Sensor Signal Amplifier

AD8555

FUNCTIONAL BLOCK DIAGRAM

FEATURES

VDD

Very low offset voltage: 10 µV maximum over temperature

Very low input offset voltage drift: 60 nV/°C maximum

High CMRR: 96 dB minimum

Digitally programmable gain and output offset voltage

Single-wire serial interface

Open and short wire fault detection

Low-pass filtering

Stable with any capacitive load

Externally programmable output clamp voltage for driving

low voltage ADCs

LFCSP-16 and SOIC-8 packages

2.7 V to 5.5 V operation

VCLAMP

VDD

VNEG

VDD

VSS

VDD

VSS

VOUT

VDD

VSS

FILT/

DIGOUT

VSS

VPOS

VDD

DAC

VSS

−40°C to +125°C operation

APPLICATIONS

Automotive sensors

Pressure and position sensors

Thermocouple amplifiers

Industrial weigh scales

Precision current sensing

Strain gages

Figure 1.

In addition to extremely low input offset voltage and input off-

set voltage drift and very high dc and ac CMRR, the AD8555

also includes a pull-up current source at the input pins and a

pull-down current source at the VCLAMP pin. This allows open

wire and shorted wire fault detection. A low-pass filter function

is implemented via a single low cost external capacitor. Output

clamping set via an external reference voltage allows the

AD8555 to drive lower voltage ADCs safely and accurately.

GENERAL DESCRIPTION

The AD8555 is a zero-drift, sensor signal amplifier with digi-

tally programmable gain and output offset. Designed to easily

and accurately convert variable pressure sensor and strain

bridge outputs to a well-defined output voltage range, the

AD8555 also accurately amplifies many other differential or

single-ended sensor outputs. The AD8555 uses the ADI pat-

ented low noise auto-zero and DigiTrim® technologies to create

an incredibly accurate and flexible signal processing solution in

a very compact footprint.

When used in conjunction with an ADC referenced to the same

supply, the system accuracy becomes immune to normal supply

voltage variations. Output offset voltage can be adjusted with a

resolution of better than 0.4% of the difference between VDD

and VSS. A lockout trim after gain and offset adjustment further

ensures field reliability.

Gain is digitally programmable in a wide range from 70 to 1,280

through a serial data interface. Gain adjustment can be fully

simulated in-circuit and then permanently programmed with

proven and reliable poly-fuse technology. Output offset voltage

is also digitally programmable and is ratiometric to the supply

voltage.

The AD8555AR is fully specified over the extended industrial

temperature range of −40°C to +125°C. Operating from

single-supply voltages of 2.7 V to 5.5 V, the AD8555 is offered in

the narrow 8-lead SOIC package and the 4 mm × 4 mm

16-lead LFCSP.

Rev. 0

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: 781.326.8703

www.analog.com

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AD8555ACP-R2 替代型号

型号	品牌	替代类型	描述	数据表
AD8555ACPZ-R2	ADI	完全替代	暂无描述
AD8555ACP-REEL7	ADI	完全替代	Zero-Drift, Digitally Programmable Sensor Signal Amplifier

与AD8555ACP-R2相关器件

型号	品牌	获取价格	描述	数据表
AD8555ACP-REEL	ADI	获取价格	Zero-Drift, Digitally Programmable Sensor Signal Amplifier
AD8555ACP-REEL7	ADI	获取价格	Zero-Drift, Digitally Programmable Sensor Signal Amplifier
AD8555ACPZ-R2	ADI	获取价格	暂无描述
AD8555ACPZ-R21	ADI	获取价格	Zero-Drift, Digitally Programmable Sensor Signal Amplifier
AD8555ACPZ-REEL	ADI	获取价格	Digitally Programmable Sensor Signal Zero-Drift Amplifier
AD8555ACPZ-REEL1	ADI	获取价格	Zero-Drift, Digitally Programmable Sensor Signal Amplifier
AD8555ACPZ-REEL71	ADI	获取价格	Zero-Drift, Digitally Programmable Sensor Signal Amplifier
AD8555AR	ADI	获取价格	Zero-Drift, Digitally Programmable Sensor Signal Amplifier
AD8555AR-REEL	ADI	获取价格	Zero-Drift, Digitally Programmable Sensor Signal Amplifier
AD8555AR-REEL7	ADI	获取价格	Zero-Drift, Digitally Programmable Sensor Signal Amplifier

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