Datasheet > XR18910ILTR-66

XR18910ILTR-66

更新时间： 2024-11-27 00:49:23

品牌	Logo	应用领域
艾科嘉 - EXAR		/
页数	文件大小	规格书
19页	948K
描述
8:1 Sensor Interface Analog Front End

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中文翻译

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XR18910ILTR-66 数据手册

XR18910

8:1 Sensor Interface Analog Front End

Description

FEATURES

The XR18910 is a unique sensor interface integrated circuit with an

onboard 8:1 multiplexer, offset correction Digital-to-Analog Converter

(DAC), instrumentation ampliﬁer and voltage reference. The XR18910

is designed to integrate multiple bridge sensors with a Microcontroller

(MCU) or Field-Programmable Gate Array (FPGA).

ꢀ■

Integrated features for interfacing multiple

bridge sensors with an MCU or FPGA

8:1 differential MUX with I²C interface

Instrumentation ampliﬁer

LDO

Offset correction DAC with I²C interface

( 560mV offset correction range)

Eight selectable voltage gains from 2V/V to

760V/V with only 0.5ꢀ gain error

3mV maximum input offset voltage

100pA maximum input bias current

559μA maximum supply current

2.7V to 5V analog supply voltage range

1.8V to 5V digital supply voltage range

-40°C to 85°C temperature range

3.5mm x 3.5mm QFN-24 package

The integrated offset correction DAC provides digital calibration of the

variable and in many cases substantial offset voltage generated by the

bridge sensors. The DAC is controlled by an I²C compatible 2-wire serial

interface. The serial interface also provides the user with easy controls

to the XR18910’s many functions such as input and gain selection.

■■

A linear regulator (LDO) provides a regulated voltage to power the input

bridge sensors and is selectable, between 3V and 2.65V. The LDO

current can be sensed and a proportional voltage present at the output

of the IC for monitoring the LDO current.

The XR18910 offers 8 ﬁxed gain settings (from 2V/V to 760V/V), each

with an error of only 0.5ꢀ, that are selectable via the I²C interface.

It also offers less than 3mV maximum input offset voltage, 100pA

maximum input bias current, and 100pA maximum input offset current.

APPLICATIONS

Bridge sensor interface

Pressure and temperature sensors

■■

The XR18910 is designed to operate from 2.7V to 5V supplies, speciﬁed

over the industrial temperature range of -40°C to 85°C and is offered in

a space saving 3.5mm x 3.5mm QFN package. It consumes less than

559μA supply current and offers a sleep mode for added power savings.

Strain gauge ampliﬁer

Industrial process controls

Weigh scales

■■

The XR18910 is well suited for industrial and consumer applications

using bridge sensors.

Typical Application

5.8μF

2.5

6.1μF

mDD

6.1μF

BRDG

mCC

6.1μF

16k

1.5

BRIDGE 8

LDO

IN8+

IN8-

0.5

OUT

INA /

PGA

ADC

µC

-0.5

-1

16nF

8:1

MUX

±±560m

OFFSET TRIM

-1.5

-2

BRIDGE 1

16-BIT

DAC

PGA

4.7k

IN1+

IN1-

SDA

SCL

-2.5

I C

CONTROL

Time (seconds)

XR18910

AGND

DGND

Figure 1. Typical Application

Figure 2. 0.1Hz to 10Hz RTI Voltage Noise

REV1A

1/19

12 3 4 5 6 7...19

中文翻译

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与XR18910ILTR-66相关器件

型号	品牌	获取价格	描述	数据表
XR18910ILTR-67	EXAR	获取价格	8:1 Sensor Interface Analog Front End
XR18W750	EXAR	获取价格	WIRELESS UART CONTROLLER
XR18W750IL48	EXAR	获取价格	WIRELESS UART CONTROLLER
XR18W753	EXAR	获取价格	SINGLE CHIP 868MHZ TO 956MHZ RF TRANSCEIVER
XR18W753IL48	EXAR	获取价格	SINGLE CHIP 868MHZ TO 956MHZ RF TRANSCEIVER
XR19L200	EXAR	获取价格	SINGLE CHANNEL INTEGRATED UART AND RS-232 TRANSCEIVER
XR19L200_07	EXAR	获取价格	SINGLE CHANNEL INTEGRATED UART AND RS-232 TRANSCEIVER
XR19L200IL32	EXAR	获取价格	SINGLE CHANNEL INTEGRATED UART AND RS-232 TRANSCEIVER
XR19L200IL32-F	EXAR	获取价格	Serial I/O Controller, 1 Channel(s), 0.030517578125MBps, CMOS, 5 X 5 MM, 0.90 MM HEIGHT, G
XR19L202	EXAR	获取价格	TWO CHANNEL INTEGRATED UART AND RS-232 TRANSCEIVER

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