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AD7091R-5BCPZ-RL7 데이터시트(PDF) 1 Page - Analog Devices

부품명 AD7091R-5BCPZ-RL7
상세설명  4-Channel, I 2 C, Ultralow Power 12-Bit ADC in 20-Lead LFCSP/TSSOP
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4-Channel, I2C, Ultralow Power,
12-Bit ADC in 20-Lead LFCSP/TSSOP
Data Sheet
AD7091R-5
Rev. 0
Document Feedback
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityisassumedbyAnalogDevicesforitsuse,norforanyinfringementsofpatentsorother
rights of third parties that may result from its use. Specifications subject to change without notice.
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
I2C-compatible serial interface supports standard and
fast modes
Ultralow power: 90 µW typical at 3 V in fast mode
Specified for VDD of 2.7 V to 5.25 V
On-chip accurate 2.5 V reference, 5 ppm/°C typical drift
4 single-ended analog input channels
ALERT function
BUSY function
Autocycle mode
Wide input bandwidth
68 dB signal-to-noise ratio (SNR) typical at input
frequency of 1 kHz
Flexible power/throughput rate management
No pipeline delays
Power-down mode
550 nA typical at VDD = 5.25 V
435 nA typical at VDD = 3 V
20-lead LFCSP and TSSOP packages
Temperature range: −40°C to +125°C
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
INPUT
MUX
CHANNEL
SEQUENCER
CONTROL
LOGIC
I2C INTERFACE
T/H
RESET
CONVST/GPO1
SDA
SCL
AS0
AS1
VDRIVE
VIN0
MUXOUT
ADCIN
VDD
REFIN/
REFOUT
REGCAP
ALERT/BUSY/
GPO0
GPO2 GND
GND
VIN1
VIN2
VIN3
12-BIT
SUCCESSIVE
APPROXIMATION
ADC
ON-CHIP
OSC
2.5V
VREF
AD7091R-5
Figure 1.
GENERAL DESCRIPTION
The AD7091R-5 is a 12-bit, multichannel, ultralow power, succes-
sive approximation analog-to-digital converter (ADC). The
AD7091R-5 operates from a single 2.7 V to 5.25 V power supply
and typically consumes only 24 µA at a 3 V supply in fast mode.
The AD7091R-5 provides a 2-wire serial interface compatible
with I2C interfaces. The conversion process can be controlled by
a sample mode via the CONVST/GPO1 pin, an autocycle mode
selected through software control, or a command mode in
which conversions occur across I2C write operations.
The device contains a wide bandwidth track-and-hold amplifier
that can handle input frequencies up to 1.5 MHz. The AD7091R-5
also features an on-chip conversion clock, an on-chip accurate
2.5 V reference, and a programmable out of bounds user alert
function.
The AD7091R-5 offers four single-ended analog input channels
with a channel sequencer that allows a preprogrammed
selection of channels to be converted sequentially.
The AD7091R-5 uses advanced design techniques to achieve
ultralow power dissipation without compromising performance. It
also features 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 before acquisition by the ADC.


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