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AD7091R-4BCPZ Arkusz danych(PDF) 1 Page - Analog Devices

Numer części AD7091R-4BCPZ
Szczegółowy opis  2-/4-/8-Channel, 1 MSPS, Ultralow Power, 12-Bit SAR ADC
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Strona internetowa  http://www.analog.com
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AD7091R-4BCPZ Arkusz danych(HTML) 1 Page - Analog Devices

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2-/4-/8-Channel, 1 MSPS,
Ultralow Power, 12-Bit SAR ADC
Data Sheet
AD7091R-2/AD7091R-4/AD7091R-8
Rev. C
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
©2013–2015 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com
FEATURES
Ultralow system power
Flexible power/throughput rate management
Normal mode
1.4 mW at 1 MSPS
Power-down mode
550 nA typical at VDD = 5.25 V
435 nA typical at VDD = 3 V
Programmable ALERT interrupt pin (4-/8-channel models)
High performance
1 MSPS throughput with no latency/pipeline delay
SNR: 70 dB typical at 10 kHz input frequency
THD: −80 dB typical at 10 kHz input frequency
INL: ±0.7 LSB typical, ±1.0 LSB maximum
Small system footprint
On-chip accurate 2.5 V reference, 5 ppm/°C typical drift
MUXOUT/ADCIN to allow single buffer amplifier
Daisy-chain mode
16-lead, 20-lead, and 24-lead 4 mm × 4 mm LFCSP packages
16-lead, 20-lead, and 24-leadTSSOP packages
Easy to use
SPI/QSPI™/MICROWIRE™/DSP compatible digital interface
Integrated programmable channel sequencer
BUSY indication available (4-/8-channel models)
Built in features for control and monitoring applications
GPOx pins available (4-/8-channel models)
Wide operating range
Temperature range: −40°C to +125°C
Specified for VDD of 2.7 V to 5.25 V
APPLICATIONS
Battery-powered systems
Personal digital assistants
Medical instruments
Mobile communications
Instrumentation and control systems
Data acquisition systems
Optical sensors
Diagnostic/monitoring functions
FUNCTIONAL BLOCK DIAGRAM
Figure 1.
GENERAL DESCRIPTION
The AD7091R-2/AD7091R-4/AD7091R-8 family is a multichannel
12-bit, ultralow power, successive approximation analog-to-
digital converter (ADC) that is available in two, four, or eight
analog input channel options. The AD7091R-2/AD7091R-4/
AD7091R-8 operate from a single 2.7 V to 5.25 V power supply
and are capable of achieving a sampling rate of 1 MSPS.
The AD7091R-2/AD7091R-4/AD7091R-8 family offers up to eight
single-ended analog input channels with a channel sequencer
that allows a preprogrammed selection of channels to be converted
sequentially. The AD7091R-2/AD7091R-4/ AD7091R-8 also
feature an on-chip conversion clock, an on-chip accurate 2.5 V
reference, and a high speed serial interface.
The AD7091R-2/AD7091R-4/AD7091R-8 have a serial port
interface (SPI) that allows data to be read after the conversion
while achieving a 1 MSPS throughput rate. The conversion process
and data acquisition are controlled using the CONVST pin.
The AD7091R-2/AD7091R-4/AD7091R-8 use advanced design
techniques to achieve ultralow power dissipation at high
throughput rates. They also feature flexible power management
options. An on-chip configuration register allows the user to set up
different operating conditions. These include power management,
alert functionality, busy indication, channel sequencing, and
general-purpose output pins. The MUXOUT and ADCIN pins
allow signal conditioning of the multiplexer output prior to
acquisition by the ADC.
GND
REGCAP
VDD
AD7091R-8
REFIN/
REFOUT
MUXOUT
ADCIN
GND
T/H
I/P
MUX
CHANNEL
SEQUENCER
CONTROL LOGIC
AND REGISTERS
12-BIT
SUCCESSIVE
APPROXIMATION
ADC
2.5V
VREF
ON-CHIP
OSC
GPO1
ALERT/
BUSY/
GPO0
SDO
SDI
VDRIVE
CONVST
RESET
SCLK
CS
VIN0
VIN1
VIN2
VIN3
VIN7
VIN6
VIN5
VIN4


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