Datasheet > AD8555ACPZ-REEL71

AD8555ACPZ-REEL71

更新时间： 2024-11-24 12:28:35

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	616K
描述
Zero-Drift, Digitally Programmable Sensor Signal Amplifier

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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 digital-

ly 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 com-

pact 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 fur-

ther 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 tem-

perature 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. A

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

www.analog.com

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与AD8555ACPZ-REEL71相关器件

型号	品牌	获取价格	描述	数据表
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
AD8555ARZ-REEL7	ADI	获取价格	Digitally Programmable Sensor Signal Zero-Drift Amplifier
AD8555ARZ-REEL71	ADI	获取价格	Zero-Drift, Digitally Programmable Sensor Signal Amplifier
AD8556	ADI	获取价格	Precision, Dual-Channel Instrumentation Amplifier
AD8556_16	ADI	获取价格	Digitally Programmable Sensor Signal Amplifier with EMI Filters

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