Datasheet > AD8555ACPZ-R2

AD8555ACPZ-R2

更新时间： 2024-01-05 16:54:29

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AD8555ACPZ-R2 数据手册

Zero-Drift, Digitally Programmable

Sensor Signal Amplifier

AD8555

Data Sheet

FEATURES

FUNCTIONAL BLOCK DIAGRAM

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

−40°C to +125°C operation

VCLAMP

VDD

VNEG

VSS

VDD

VSS

VOUT

VDD

VSS

FILT/

DIGOUT

VSS

VPOS

VDD

DAC

VSS

APPLICATIONS

Pressure and position sensors

Thermocouple amplifiers

Industrial weigh scales

Precision current sensing

Strain gages

Figure 1.

GENERAL DESCRIPTION

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

digitally 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

patented low noise auto-zero and DigiTrim® technologies to

create an incredibly accurate and flexible signal processing

solution in a very compact footprint.

In addition to extremely low input offset voltage and input

offset 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.

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 AD8555 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. B

Document Feedback

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

rightsof third parties that may result fromits 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 andregisteredtrademarks are the property of their respective owners.

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

Technical Support

www.analog.com

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AD8555ACPZ-R2 替代型号

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

与AD8555ACPZ-R2相关器件

型号	品牌	获取价格	描述	数据表
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
AD8555ARZ1	ADI	获取价格	Zero-Drift, Digitally Programmable Sensor Signal Amplifier
AD8555ARZ-REEL	ADI	获取价格	Digitally Programmable Sensor Signal Zero-Drift Amplifier
AD8555ARZ-REEL1	ADI	获取价格	Zero-Drift, Digitally Programmable Sensor Signal Amplifier

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