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AD7124-8BCPZ-RL7 Scheda tecnica(PDF) 1 Page - Analog Devices

Il numero della parte AD7124-8BCPZ-RL7
Spiegazioni elettronici  8-Channel, Low Noise, Low Power, 24-Bit, Sigma-Delta ADC with PGA and Reference
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Produttore elettronici  AD [Analog Devices]
Homepage  http://www.analog.com
Logo AD - Analog Devices

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8-Channel, Low Noise, Low Power, 24-Bit,
Sigma-Delta ADC with PGA and Reference
Data Sheet
AD7124-8
Rev. B
Document Feedback
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityisassumedbyAnalogDevicesforitsuse,norforanyinfringementsofpatentsorother
rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
©2015 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com
FEATURES
3 power modes
RMS noise
Low power: 24 nV rms at 1.17 SPS, gain = 128 (255 µA typical)
Mid power: 20 nV rms at 2.34 SPS, gain = 128 (355 µA typical)
Full power: 23 nV rms at 9.4 SPS, gain = 128 (930 µA typical)
Up to 22 noise free bits in all power modes (gain = 1)
Output data rate
Full power: 9.38 SPS to 19,200 SPS
Mid power: 2.34 SPS to 4800 SPS
Low power: 1.17 SPS to 2400 SPS
Rail-to-rail analog inputs for gains > 1
Simultaneous 50 Hz/60 Hz rejection at 25 SPS (single cycle
settling)
Diagnostic functions (which aid safe integrity level (SIL)
certification)
Crosspoint multiplexed analog inputs
8 differential/15 pseudo differential inputs
Programmable gain (1 to 128)
Band gap reference with 15 ppm/°C drift maximum (65 µA)
Matched programmable excitation currents
Internal clock oscillator
On-chip bias voltage generator
Low-side power switch
General-purpose outputs
Multiple filter options
Internal temperature sensor
Self and system calibration
Sensor burnout detection
Automatic channel sequencer
Per channel configuration
Power supply: 2.7 V to 3.6 V and ±1.8 V
Independent interface power supply
Power-down current: 5 µA maximum
Temperature range: −40°C to +105°C
32-lead LFCSP
3-wire or 4-wire serial interface
SPI, QSPI™, MICROWIRE™, and DSP compatible
Schmitt trigger on SCLK
ESD: 4 kV
APPLICATIONS
Temperature measurement
Pressure measurement
Industrial process control
Instrumentation
Smart transmitters
FUNCTIONAL BLOCK DIAGRAM
TEMPERATURE
SENSOR
BANDGAP
REF
VBIAS
SERIAL
INTERFACE
AND
CONTROL
LOGIC
INTERNAL
CLOCK
CLK
SCLK
DIN
SYNC
REGCAPD
IOVDD
AD7124-8
AVSS
DGND
24-BIT
Σ-Δ ADC
X-MUX
REFIN1(+)
AVDD
AVSS
REFOUT
AVDD
AVSS
PSW
VARIABLE
DIGITAL
FILTER
DIAGNOSTICS
COMMUNICATIONS
POWER SUPPLY
SIGNAL CHAIN
DIGITAL
REFIN1(–)
REFIN2(+)
REFIN2(–)
BURNOUT
DETECT
EXCITATION
CURRENTS
POWER
SWITCH
GPOs
CHANNEL
SEQUENCER
CROSSPOINT
MUX
REGCAPA
AVDD
1.9V
LDO
DIAGNOSTICS
AVDD
AVSS
AVSS
DOUT/RDY
CS
1.8V
LDO
AIN0/IOUT/VBIAS
ANALOG
BUFFERS
REFERENCE
BUFFERS
AIN1/IOUT/VBIAS
AIN2/IOUT/VBIAS/P1
AIN3/IOUT/VBIAS/P2
AIN4/IOUT/VBIAS/P3
AIN5/IOUT/VBIAS/P4
AIN6/IOUT/VBIAS
AIN7/IOUT/VBIAS
AIN8/IOUT/VBIAS
AIN9/IOUT/VBIAS
AIN10/IOUT/VBIAS
AIN11/IOUT/VBIAS
AIN12/IOUT/VBIAS
AIN13/IOUT/VBIAS
AIN14/IOUT/VBIAS/REFIN2(+)
AIN15/IOUT/VBIAS/REFIN2(–)
BUF
BUF
PGA2
PGA1
Figure 1.


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