AD7719 Selling Leads, Price trend, AD7719 DataSheet download, circuit diagram from SeekIC.com

Features: HIGH RESOLUTION - ADCsTwo Independent ADCs (16- and 24-Bit Resolution)Factory-Calibrated (Field Calibration Not Required)Output Settles in One Conversion Cycle (SingleConversion Mode)Programmable Gain Front EndSimultaneous Sampling and Conversion of TwoSignal SourcesSeparate Reference In...

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SeekIC No. : 004270740 Detail

AD7719: Features: HIGH RESOLUTION - ADCsTwo Independent ADCs (16- and 24-Bit Resolution)Factory-Calibrated (Field Calibration Not Required)Output Settles in One Conversion Cycle (SingleConversion Mode)Progr...

AD7719 Data Sheet

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Part Number:: AD7719
Supply Ability:: 5000

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Product Details

Description

Features:

HIGH RESOLUTION - ADCs
Two Independent ADCs (16- and 24-Bit Resolution)
Factory-Calibrated (Field Calibration Not Required)
Output Settles in One Conversion Cycle (Single
Conversion Mode)
Programmable Gain Front End
Simultaneous Sampling and Conversion of Two
Signal Sources
Separate Reference Inputs for Each Channel
Simultaneous 50 Hz and 60 Hz Rejection at 20 Hz
Update Rate
ISOURCE Select^TM
24-Bit No Missing Codes-Main ADC
13-Bit p-p Resolution @ 20 Hz, 20 mV Range
18-Bit p-p Resolution @ 20 Hz, 2.56 V Range
INTERFACE
3-Wire Serial
SPI^TM , QSPI ^TM, MICROWIRE^TM and DSP-Compatible
Schmitt Trigger on SCLK
POWER
Specified for Single 3 V and 5 V Operation
Normal: 1.5 mA Typ @ 3 V
Power-Down: 10 A (32 kHz Crystal Running)
ON-CHIP FUNCTIONS
Rail-Rail Input Buffer and PGA
4-Bit Digital I/O Port
On-Chip Temperature Sensor
Dual Switchable Excitation Current Sources
Low-Side Power Switches
Reference Detect Circuit

Application

Sensor Measurement
Temperature Measurement
Pressure Measurements
Weigh Scales
Portable Instrumentation
420 mA Transmitters

Pinout

AD7719 Diagram

Specifications

Resolution (Bits)	24bit
T-Put Rate	105SPS
# Chan	6
Supply V	Multi(+3, +5),Single(+3),Single(+3.3),Single(+5)
Pwr Diss	10mW

Interface	Ser,SPI
Ain Range	(2Vref) p-p,(2Vref/PGA Gain) p-p,(Vref) p-p
SNR (dB)	126dB
Pkg Type	SOIC,SOP

AV_DD to AGND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.3 V to +7 V
AV_DD to DGND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.3 V to +7 V
DV_DD to AGND . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . 0.3 V to +7 V
DV_DD to DGND . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . . . 0.3 V to +7 V
AGND to DGND . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 mV to +20 mV
PWRGND to AGND² . . . . . . . . . . .. . . . . . . . . . . . . . 20 mV to +20 mV
AV_DD to DV_DD. . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . 5 V to +5 V
Analog Input Voltage to AGND . . . .. . . . . . . . . .0.3 V to AV_DD +0.3 V
Reference Input Voltage to AGND . .. . .. . . . . . . 0.3 V to AV_DD +0.3 V
Total AIN/REFIN Current (Indefinite) . . . . . . . . . .. .. .. . . . . . . . 30 mA
Digital Input Voltage to DGND . . .. . . . .. . . . . . . . 0.3 V to DV_DD +0.3 V
Digital Output Voltage to DGND . .. . . . . . . . . . . . 0.3 V to DV_DD +0.3 V
Operating Temperature Range . . . . . . . . . .. . . . . . . . 40°C to +85°C
Storage Temperature Range . . . . . . . . . . . . . . .. . . 65°C to +150°C
Junction Temperature . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . . 150°C
SOIC Package
_JA Thermal Impedance . . . . . . . . . . . . . . . . .. . . . . . . . . . . . 71.4°C/W
_JCThermal Impedance . . . . . . . . . . . . . . . . . . .. . . ... . . . . . . 23°C/W
TSSOP Package
_JA Thermal Impedance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97.9°C/W
_JCThermal Impedance . . . . . . . . . . . . . . . . . . . .. . . . .. .. . . . . 14°C/W
Lead Temperature, Soldering
Vapor Phase (60 sec) . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . 215°C
Infrared (15 sec) . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . 220°C

Description

The AD7719 is a complete analog front end for low frequency measurement applications. It contains two high resolution sigma-delta ADCs, switchable matched excitation current sources, low-side power switches, digital I/O port, and temperature sensor. The 24-bit main channel with PGA accepts fully differen- tial, unipolar, and bipolar input signal ranges from 1.024 ×REFIN1/128 to 1.024 × REFIN1. Signals can be converted directly from a transducer without the need for signal condi- tioning. The 16-bit auxiliary channel AD7719 has an input signal range of REFIN2 or REFIN2/2.

The device AD7719 operates from a 32 kHz crystal with an on-chip PLL generating the required internal operating frequency. The output data rate from the part is software programmable. The peak-to-peak resolution from the part varies with the programmed gain and output data rate.

The part AD7719 operates from a single 3 V or 5 V supply. When oper-ating from 3 V supplies, the power dissipation for the part is 4.5 mW with both ADCs enabled and 2.85 mW with only the main ADC enabled in unbuffered mode. The AD7719 is housed in 28-lead SOIC and TSSOP packages.

AD7719

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