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Datasheet> All Categories > semiconductor> Analog mixed-signal IC> XR18910IL-64
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XR18910IL-64

Description
Interface Development Tools XR18910 Evaluation Board
Categorysemiconductor    Analog mixed-signal IC   
File Size805KB，19 Pages
ManufacturerExar [Exar Corporation]
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XR18910IL-64 Overview

Interface Development Tools XR18910 Evaluation Board

XR18910IL-64 Parametric

Parameter NameAttribute value
Product CategorySensor Interface
ManufacturerExar [Exar Corporation]
RoHSDetails
TypeSensor Interface Analog Front End
Interface TypeI2C
Supply Voltage - Max5.25 V
Supply Voltage - Min1.7 V
Operating Supply Current457 uA
Minimum Operating Temperature- 40 C
Maximum Operating Temperature+ 85 C
Mounting StyleSMD/SMT
Package / CaseQFN-24
PackagingTray
Development KitXR18910ILEVB
Features8:1 Differential MUX, INA, LDO, Offset Correction DAC
Ib - Input Bias Current15 pA
Input Current457 uA
Input Voltage1.7 V to 5.25 V
Moisture SensitiveYes
Number of Channels8 Channel
Operating Supply Voltage1.7 V to 5.25 V
Output Current25 mA
Output Voltage3 V
ProductSensor Interface
Reference TypeInternal
Reference Voltage1.5 V
Factory Pack Quantity490

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XR18910
8:1 Sensor Interface Analog Front End
Description
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).
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 I
2
C 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 ±0.5%, that are selectable via the I
2
C interface.
It also offers less than 3mV maximum input offset voltage, 100pA
maximum input bias current, and 100pA maximum input offset current.
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.
The XR18910 is well suited for industrial and consumer applications
using bridge sensors.
FEATURES
■■
Integrated features for interfacing multiple
bridge sensors with an MCU or FPGA
8:1 differential MUX with I
2
C interface
Instrumentation amplifier
LDO
Offset correction DAC with I
2
C interface
(±560mV offset correction range)
■
■
Eight selectable voltage gains from 2V/V to
760V/V with only ±0.5% 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
APPLICATIONS
■
■
Bridge sensor interface
■
■
Pressure and temperature sensors
■
■
Strain gauge amplifier
■
■
Industrial process controls
■
■
Weigh scales
Typical Application
V
CC
6.8 F
+
V
DD
6.8 F
+
0.1 F
BRDG
BRIDGE 8
VCC
0.1 F
VDD
2.5
2
0.1 F
1.5
RTI Noise (µV)
1
0.5
0
-0.5
-1
-1.5
-2
-2.5
0
2
4
6
Time (seconds)
8
10
LDO
IN8+
IN8-
INA /
PGA
8:1
MUX
BRIDGE 1
IN1+
IN1-
OUT
10k
10nF
ADC
µC
±560mV
OFFSET TRIM
10-BIT
DAC
V
DD
PGA
SDA
V
DD
4.7k
4.7k
I
2
C
CONTROL
SCL
XR18910
AGND
DGND
Figure 1. Typical Application
REV1A
Figure 2. 0.1Hz to 10Hz RTI Voltage Noise
1/19

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Product Category Sensor Interface Sensor Interface Interface Development Tools Sensor Interface Sensor Interface Sensor Interface Sensor Interface Sensor Interface
Manufacturer Exar [Exar Corporation] Exar [Exar Corporation] Exar [Exar Corporation] Exar [Exar Corporation] Exar [Exar Corporation] Exar [Exar Corporation] Exar [Exar Corporation] Exar [Exar Corporation]
RoHS Details Details Details Details Details Details Details Details
Type Sensor Interface Analog Front End Sensor Interface Analog Front End Sensor Interface Sensor Interface Analog Front End Sensor Interface Analog Front End Sensor Interface Analog Front End Sensor Interface Analog Front End Sensor Interface Analog Front End
Interface Type I2C I2C I2C I2C I2C I2C I2C I2C
Minimum Operating Temperature - 40 C - 40 C - 40 C - 40 C - 40 C - 40 C - 40 C - 40 C
Maximum Operating Temperature + 85 C + 85 C + 85 C + 85 C + 85 C + 85 C + 85 C + 85 C
Operating Supply Voltage 1.7 V to 5.25 V 1.7 V to 5.25 V 2.7 V to 5 V 1.7 V to 5.25 V 1.7 V to 5.25 V 1.7 V to 5.25 V 1.7 V to 5.25 V 1.7 V to 5.25 V
Product Sensor Interface Sensor Interface Evaluation Boards Sensor Interface Sensor Interface Sensor Interface Sensor Interface Sensor Interface
Factory Pack Quantity 490 490 1 3000 250 250 250 250
Supply Voltage - Max 5.25 V 5.25 V - 5.25 V 5.25 V 5.25 V 5.25 V 5.25 V
Supply Voltage - Min 1.7 V 1.7 V - 1.7 V 1.7 V 1.7 V 1.7 V 1.7 V
Operating Supply Current 457 uA 457 uA - 457 uA 457 uA 457 uA 457 uA 457 uA
Mounting Style SMD/SMT SMD/SMT - SMD/SMT SMD/SMT SMD/SMT SMD/SMT SMD/SMT
Package / Case QFN-24 QFN-24 - QFN-24 QFN-24 QFN-24 QFN-24 QFN-24
Packaging Tray Tray Bulk Reel Cut Tape Cut Tape Cut Tape Cut Tape
Development Kit XR18910ILEVB XR18910ILEVB - XR18910ILEVB XR18910ILEVB XR18910ILEVB XR18910ILEVB XR18910ILEVB
Features 8:1 Differential MUX, INA, LDO, Offset Correction DAC 8:1 Differential MUX, INA, LDO, Offset Correction DAC - 8:1 Differential MUX, INA, LDO, Offset Correction DAC 8:1 Differential MUX, INA, LDO, Offset Correction DAC 8:1 Differential MUX, INA, LDO, Offset Correction DAC 8:1 Differential MUX, INA, LDO, Offset Correction DAC 8:1 Differential MUX, INA, LDO, Offset Correction DAC
Ib - Input Bias Current 15 pA 15 pA - 15 pA 15 pA 15 pA 15 pA 15 pA
Input Current 457 uA 457 uA - 457 uA 457 uA 457 uA 457 uA 457 uA
Input Voltage 1.7 V to 5.25 V 1.7 V to 5.25 V - 1.7 V to 5.25 V 1.7 V to 5.25 V 1.7 V to 5.25 V 1.7 V to 5.25 V 1.7 V to 5.25 V
Number of Channels 8 Channel 8 Channel - 8 Channel 8 Channel 8 Channel 8 Channel 8 Channel
Output Current 25 mA 25 mA - 25 mA 25 mA 25 mA 25 mA 25 mA
Output Voltage 3 V 3 V - 3 V 3 V 3 V 3 V 3 V
Reference Type Internal Internal - Internal Internal Internal Internal Internal
Reference Voltage 1.5 V 1.5 V - 1.5 V 1.5 V 1.5 V 1.5 V 1.5 V

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