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MFG:ADI D/C:09
Part Number: AD7713
MFG: ADI
D/C: 09
Description: The AD7713 is a complete analog front end for low frequency measurement applications. The device accep...
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AD7713
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DataSheet
General Description
AD7713 General Description
The AD7713 is a complete analog front end for low frequency measurement applications. The device accepts low level signals directly from a transducer or high level signals (4 × VREF) and outputs a serial digital word. It employs a sigma-delta con- version technique to realize up to 24 bits of no missing codes performance. The input signal is applied to a proprietary pro-grammable gain front end based around an analog modulator. The modulator output is processed by an on-chip digital filter.The first notch of this digital filter can be programmed via the on-chip control register allowing adjustment of the filter cutoff and settling time.
The part features two differential analog inputs and one single-ended high level analog input as well as a differential reference input. It can be operated from a single supply (AVDD and DVDD at +5 V). The part provides two current sources which can be used to provide excitation in three-wire and four-wire RTD con-figurations. The AD7713 thus performs all signal conditioning and conversion for a single, dual or three-channel system.
The AD7713 is ideal for use in smart, microcontroller-based systems. Gain settings, signal polarity and RTD current control can be configured in software using the bidirectional serial port. The AD7713 contains self-calibration, system calibration and background calibration options and also allows the user to read and to write the on-chip calibration registers.
AD7713 Maximum Ratings
AVDD to AGND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.3 V to +12 V
AVDD to DGND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.3 V to +12 V
DVDD to AGND . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . 0.3 V to +6 V
DVDD to DGND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . 0.3 V to +6 V
AGND to DGND . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . 0.3 V to +6 V
AIN1, AIN2 Input Voltage
to AGND . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . .0.3 V to AVDD + 0.3 V
AIN3 Input Voltage to AGND . . . . . . . . . .. . . . . . . . . . . . . . . . 0.3 V to +22 V
Reference Input Voltage to AGND . . . . . . . . . . . . . . . . 0.3 V to AVDD + 0.3 V
Digital Input Voltage to DGND . . . .. . . . . . . . . . . . . . . 0.3 V to AVDD + 0.3 V
Digital Output Voltage to DGND . . . . . . . . . . . . . . . . . . 0.3 V to DVDD + 0.3 V
Operating Temperature Range
Commercial (A Version) . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40°C to +85°C
Extended (S Version) . . . . . . . . . . . . .. . . . . . . . . . . . . . . . .55°C to +125°C
Storage Temperature Range . . . . . . . . .. . . . .. . . . .. . . . .. .65°C to +150°C
Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . .. . . . . .+150°C
Plastic DIP Package, Power Dissipation . . . . . . .. . . . .. . . . . . . .. . . . . . 450 mW
JA Thermal Impedance . . . . . . . . . . . . . . . . . . . . . . .. . . . .. . . . . . . .105°C/W
Lead Temperature, Soldering (10 sec) . . . . . . .. . . . .. . . . . . . . . . . . . .+260°C
Cerdip Package, Power Dissipation . . . . . . . . . .. . . . .. . . . . . . . . . . . . 450 mW
JA Thermal Impedance . . . . . . . . . . . . . . . . . . . . . . .. . . . .. . . . . . . . .70°C/W
Lead Temperature, Soldering . . . . . . . . . . . . . . .. . . . .. . . . . . .. . .. . .+300°C
SOIC Package, Power Dissipation . . . . . . . . . . . . . . . .. . . . .. . . . . . . . 450 mW
JA Thermal Impedance . . . . . . . . . . . . . . . . . . .. . . . .. . . . . . . . . .. . .75°C/W
Lead Temperature, Soldering
Vapor Phase (60 sec) . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . ... . . . . .+215°C
Infrared (15 secs) . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . ... . . . .+220°C
Power Dissipation (Any Package) to +75°C . . . . . .. . . . .. . . . . . . . . . 450 mW
AVDD to DGND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.3 V to +12 V
DVDD to AGND . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . 0.3 V to +6 V
DVDD to DGND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . 0.3 V to +6 V
AGND to DGND . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . 0.3 V to +6 V
AIN1, AIN2 Input Voltage
to AGND . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . . .0.3 V to AVDD + 0.3 V
AIN3 Input Voltage to AGND . . . . . . . . . .. . . . . . . . . . . . . . . . 0.3 V to +22 V
Reference Input Voltage to AGND . . . . . . . . . . . . . . . . 0.3 V to AVDD + 0.3 V
Digital Input Voltage to DGND . . . .. . . . . . . . . . . . . . . 0.3 V to AVDD + 0.3 V
Digital Output Voltage to DGND . . . . . . . . . . . . . . . . . . 0.3 V to DVDD + 0.3 V
Operating Temperature Range
Commercial (A Version) . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40°C to +85°C
Extended (S Version) . . . . . . . . . . . . .. . . . . . . . . . . . . . . . .55°C to +125°C
Storage Temperature Range . . . . . . . . .. . . . .. . . . .. . . . .. .65°C to +150°C
Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . .. . . . . .+150°C
Plastic DIP Package, Power Dissipation . . . . . . .. . . . .. . . . . . . .. . . . . . 450 mW
JA Thermal Impedance . . . . . . . . . . . . . . . . . . . . . . .. . . . .. . . . . . . .105°C/W
Lead Temperature, Soldering (10 sec) . . . . . . .. . . . .. . . . . . . . . . . . . .+260°C
Cerdip Package, Power Dissipation . . . . . . . . . .. . . . .. . . . . . . . . . . . . 450 mW
JA Thermal Impedance . . . . . . . . . . . . . . . . . . . . . . .. . . . .. . . . . . . . .70°C/W
Lead Temperature, Soldering . . . . . . . . . . . . . . .. . . . .. . . . . . .. . .. . .+300°C
SOIC Package, Power Dissipation . . . . . . . . . . . . . . . .. . . . .. . . . . . . . 450 mW
JA Thermal Impedance . . . . . . . . . . . . . . . . . . .. . . . .. . . . . . . . . .. . .75°C/W
Lead Temperature, Soldering
Vapor Phase (60 sec) . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . ... . . . . .+215°C
Infrared (15 secs) . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . ... . . . .+220°C
Power Dissipation (Any Package) to +75°C . . . . . .. . . . .. . . . . . . . . . 450 mW
AD7713 Features
Charge Balancing ADC
24 Bits No Missing Codes0.0015% Nonlinearity
Three-Channel Programmable Gain Front End
Gains from 1 to 128
Two Differential Inputs
One Single Ended High Voltage Input
Low-Pass Filter with Programmable Filter Cutoffs
Ability to Read/Write Calibration Coefficients
Bidirectional Microcontroller Serial Interface
Single Supply Operation
Low Power (3.5 mW typ) with Power-Down Mode
(150 W typ)
APPLICATIONS
Loop Powered (Smart) Transmitters
RTD Transducers
Process Control
Portable Industrial Instrumentsv
24 Bits No Missing Codes0.0015% Nonlinearity
Three-Channel Programmable Gain Front End
Gains from 1 to 128
Two Differential Inputs
One Single Ended High Voltage Input
Low-Pass Filter with Programmable Filter Cutoffs
Ability to Read/Write Calibration Coefficients
Bidirectional Microcontroller Serial Interface
Single Supply Operation
Low Power (3.5 mW typ) with Power-Down Mode
(150 W typ)
APPLICATIONS
Loop Powered (Smart) Transmitters
RTD Transducers
Process Control
Portable Industrial Instrumentsv
AD7713 Connection Diagram
AD7713
PDF/DataSheet Download
- Datasheet: AD7713
- File Size: 528402 KB
- Manufacturer: AD [Analog Devices]
- Click here to Download
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- ·AD7008JP50
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- 517485 KB
AD7713 Relative Products
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