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AD7091R Arkusz danych(PDF) 1 Page - Analog Devices

Numer części AD7091R
Szczegółowy opis  1 MSPS, Ultralow Power, 12-Bit ADC in 10-Lead LFCSP and MSOP
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Strona internetowa  http://www.analog.com
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AD7091R Arkusz danych(HTML) 1 Page - Analog Devices

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1 MSPS, Ultralow Power,
12-Bit ADC in 10-Lead LFCSP and MSOP
Data Sheet
AD7091R
Rev. 0
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
www.analog.com
Fax: 781.461.3113
©2012 Analog Devices, Inc. All rights reserved.
FEATURES
Fast throughput rate of 1 MSPS
Specified for VDD of 2.7 V to 5.25 V
Logic voltage VDRIVE of 1.65 V to 5.25 V
INL of ±1 LSB maximum
Analog input range of 0 V to VREF
Ultralow power
349 µA typical at 3 V and 1 MSPS
264 nA typical at 3 V in power-down mode
Internal 2.5 V reference, ±4.5 ppm/°C typical drift
Wide input bandwidth
Flexible power/throughput rate management
High speed serial interface
SPI®/QSPI™/MICROWIRE™/DSP compatible
BUSY indicator
Power-down mode
10-lead, 3 mm × 2 mm LFCSP and 10-lead MSOP packages
Temperature range of −40°C to +125°C
APPLICATIONS
Battery-powered systems
Handheld meters
Medical instruments
Mobile communications
Instrumentation and control systems
Data acquisition systems
Optical sensors
Diagnostic/monitoring functions
Energy harvesting
FUNCTIONAL BLOCK DIAGRAM
Figure 1.
Figure 2. Power vs. Throughput Rate
GENERAL DESCRIPTION
The AD7091R is a 12-bit successive approximation analog-to-
digital converter (ADC) that offers ultralow power consumption
(typically 349 µA at 3 V and 1 MSPS) while achieving fast
throughput rates (1 MSPS with a 50 MHz SCLK). Operating
from a single 2.7 V to 5.25 V power supply, the part contains a
wide bandwidth track-and-hold amplifier that can handle input
frequencies in excess of 7 MHz. The AD7091R also features an
on-chip conversion clock, accurate reference, and high speed
serial interface.
The conversion process and data acquisition are controlled using
a CONVST signal and an internal oscillator. The AD7091R has
a serial interface that allows data to be read after the conversion
while achieving a 1 MSPS throughput rate.
The AD7091R uses advanced design and process techniques to
achieve very low power dissipation at high throughput rates. An
on-chip, accurate 2.5 V reference is available.
PRODUCT HIGHLIGHTS
1. Lowest Power 12-Bit SAR ADC Available.
2. On-Chip, Accurate 2.5 V Reference.
3. High Throughput Rate with Ultralow Power Consumption.
4. Flexible Power/Throughput Rate Management.
Average power scales with the throughput rate. Power-down
mode allows the average power consumption to be reduced
when the device is not performing a conversion.
5. Single Supply Operation with VDRIVE Function.
The AD7091R operates from a single 2.7 V to 5.25 V supply.
The VDRIVE function allows the serial interface to connect
directly to 1.8 V to 3.3 V processors.
2.5V
REF
CONVERSION
CONTROL LOGIC
GND
CLK
OSC
VIN
REGCAP
VDD
12-BIT
SAR
SERIAL
INTERFACE
SDO
AD7091R
SCLK
CS
VDRIVE
CONVST
T/H
REFIN/REFOUT
0
100
200
300
400
500
600
700
800
900
1000
1100
0
200
400
600
800
1000
THROUGHPUT RATE (kSPS)
VDD
VDRIVE
VDD = VDRIVE = 3V
VDD = VDRIVE = 3V


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