AD8557ARZ

更新时间： 2024-02-24 12:06:32

品牌	Logo	应用领域
亚德诺 - ADI		模拟IC 传感器信号电路放大器光电二极管
页数	文件大小	规格书
24页	508K
描述
Digitally Programmable Sensor Signal Amplifier

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AD8557ARZ 数据手册

Digitally Programmable

Sensor Signal Amplifier

AD8557

FEATURES

FUNCTIONAL BLOCK DIAGRAM

VDD

Very low offset voltage: 12 μV maximum over temperature

Very low input offset voltage drift: 65 nV/°C maximum

High CMRR: 96 dB minimum

Digitally programmable gain and output offset voltage

Gain range from 28 to 1300

Qualified for automotive applications

Single-wire serial interface

Stable with any capacitive load

VCLAMP

VDD

VNEG

VSS

VDD

VSS

VOUT

SOIC_N and LFCSP_VQ packages

2.7 V to 5.5 V operation

VDD

VSS

APPLICATIONS

VPOS

VDD

DIGIN

VSS

Automotive sensors

VSS

Pressure and position sensors

Precision current sensing

Thermocouple amplifiers

Industrial weigh scales

Strain gages

Figure 1.

GENERAL DESCRIPTION

The AD8557 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 AD8557

accurately amplifies many other differential or single-ended

sensor outputs. The AD8557 uses the Analog Devices, Inc.

patented low noise auto-zero and DigiTrim® technologies to

create an accurate and flexible signal processing solution in a

compact footprint.

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

pull-down current source at the VCLAMP pin. Output

clamping set via an external reference voltage allows the

AD8557 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 28 to 1300

through a serial data interface. Gain adjustment can be fully

simulated in circuit and then permanently programmed with

reliable polyfuse technology. Output offset voltage is also

digitally programmable and is ratiometric to the supply voltage.

The AD8557 is fully specified from −40°C to +125°C.

Operating from single-supply voltages of 2.7 V to 5.5 V, the

AD8557 is offered in an 8-lead SOIC_N, and a 4 mm × 4 mm,

16-lead LFCSP_VQ.

In addition to extremely low input offset voltage and input

offset voltage drift and very high dc and ac CMRR, the AD8557

Rev. C

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 registeredtrademarks arethe 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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AD8557ARZ 替代型号

型号	品牌	替代类型	描述	数据表
AD8557ARZ-REEL7	ADI	类似代替	Digitally Programmable Sensor Signal Amplifier
AD8557ARZ-REEL	ADI	类似代替	Digitally Programmable Sensor Signal Amplifier

与AD8557ARZ相关器件

型号	品牌	获取价格	描述	数据表
AD8557ARZ-REEL	ADI	获取价格	Digitally Programmable Sensor Signal Amplifier
AD8557ARZ-REEL7	ADI	获取价格	Digitally Programmable Sensor Signal Amplifier
AD8560	ADI	获取价格	16 V Rail-to-Rail Buffer Amplifier
AD8560ACP	ADI	获取价格	16 V Rail-to-Rail Buffer Amplifier
AD8561	ADI	获取价格	Ultrafast 7 ns Single Supply Comparator
AD8561_13	ADI	获取价格	Ultrafast 7 ns Single Supply Comparator
AD8561AN	ADI	获取价格	Ultrafast 7 ns Single Supply Comparator
AD8561ANZ	ADI	获取价格	Ultrafast 7 ns Single Supply Comparator
AD8561AR	ADI	获取价格	Ultrafast 7 ns Single Supply Comparator
AD8561AR-REEL	ADI	获取价格	Ultrafast 7 ns Single Supply Comparator

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