EVAL-SDP-CB1Z View Datasheet(PDF) - Analog Devices
Part Name
Description
MFG CO.
'EVAL-SDP-CB1Z' PDF : 35 Pages View PDF
Data Sheet
4-Channel, I2C, Ultra Low Power,
12-Bit ADC in 20-Lead LFCSP/TSSOP
AD7091R-5
FEATURES
I2C-compatible serial interface supports standard and
fast modes
Ultra low 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
GENERAL DESCRIPTION
The AD7091R-5 is a 12-bit, multichannel, ultra low 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.
FUNCTIONAL BLOCK DIAGRAM
MUXOUT ADCIN VDD
RREEFFOINU/T
REGCAP
VIN0
VIN1
VIN2
VIN3
INPUT
MUX
2.5V
VREF
12-BIT
T/H
SUCCESSIVE
APPROXIMATION
ADC
CHANNEL
SEQUENCER
ON-CHIP
OSC
AD7091R-5
CONTROL
LOGIC
I2C INTERFACE
RESET
CONVST/GPO1
SDA
SCL
AS0
AS1
VDRIVE
GND
ALERT/BUSY/
GPO0
GPO2
GND
Figure 1.
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
ultra low 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.
Rev. A
Document Feedback
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
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.
Trademarks and registered trademarks are the property of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700 ©2015–2018 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com
Share Link: 
