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Analog Devices Semiconductor Electronic Components Datasheet

AD7992 Datasheet

12-Bit ADC

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2-Channel, 12-Bit ADC with I2C-Compatible
Interface in 10-Lead MSOP
AD7992
FEATURES
12-bit ADC with fast conversion time: 2 µs typ
2 single-ended analog input channels
Specified for VDD of 2.7 V to 5.5 V
Low power consumption
Fast throughput rate: up to 188 kSPS
Sequencer operation
Temperature range: 40 °C to 125 °C
Automatic cycle mode
I2C®-compatible serial interface supports standard, fast,
and high speed modes
Out-of-range indicator/alert function
Pin-selectable addressing via AS
2 versions allow 5 I2C addresses
Shutdown mode: 1 µA max
10-lead MSOP package
GENERAL DESCRIPTION
The AD7992 is a 12-bit, low power, successive approximation
ADC with an I2C-compatible interface. The part operates from
a single 2.7 V to 5.5 V power supply and features a 2 µs conver-
sion time. The part contains a 2-channel multiplexer and track-
and-hold amplifier that can handle input frequencies up to
11 MHz.
The AD7992 provides a 2-wire serial interface compatible with
I2C interfaces. The part comes in two versions, the AD7992-0
and the AD7992-1, and each version allows for at least two
different I2C addresses. The AD7992-0 supports standard and
fast I2C interface modes, and the AD7992-1 supports standard,
fast, and high speed I2C interface modes.
The AD7992 normally remains in a shutdown state while not
converting, and powers up only for conversions. The conversion
process can be controlled using the CONVST pin, by a
command mode where conversions occur across I2C write
operations, or an automatic conversion interval mode selected
through software control.
The AD7992 requires an external reference in the range of 1.2 V
to VDD. This allows the widest dynamic input range to the ADC.
On-chip limit registers can be programmed with high and low
limits for the conversion result, and an open-drain, out-of-
range indicator output (ALERT) becomes active when the
conversion result violates the programmed high or low limits.
This output can be used as an interrupt.
Rev. 0
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.
VIN1
VIN2/REFIN
VDD
AS
FUNCTIONAL BLOCK DIAGRAM
GND
CONVST
AD7992
I/P
MUX
T/H
12-BIT SUCCESSIVE
APPROXIMATION
ADC
CONTROL
LOGIC
VIN2/REFIN
SOFTWARE
CONTROL
HYSTERESIS
REGISTER CH0
DATAHIGH LIMIT
REGISTER CH1
DATALOW LIMIT
REGISTER CH1
HYSTERESIS
REGISTER CH1
DATAHIGH LIMIT
REGISTER CH2
DATALOW LIMIT
REGISTER CH2
CONVERSION
RESULT
REGISTER
CONFIGURATION
REGISTER
ALERT STATUS
REGISTER
CYCLE TIMER
REGISTER
I2C INTERFACE
ALERT
SCL
SDA
GND
Figure 1.
PRODUCT HIGHLIGHTS
1. 2 µs conversion time and low power consumption.
2. I2C-compatible serial interface with pin-selectable
addresses. Two AD7992 versions allow five AD7992
devices to be connected to the same serial bus.
3. The part features automatic shutdown while not converting
to maximize power efficiency. Current consumption is
1 µA max when in shutdown mode at 3 V.
4. Reference can be driven up to the power supply.
5. Out-of-range indicator that can be software disabled or
enabled.
6. One-shot and automatic conversion rates.
7. Registers store minimum and maximum conversion
results.
Table 1. Related Products
Part Number No. of Bits
AD7998
12
AD7994
12
AD7997
10
AD7993
10
No. of Channels
8
4
8
4
Package
20-TSSOP
16-TSSOP
20-TSSOP
16-TSSOP
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
www.analog.com
Fax: 781.326.8703 © 2005 Analog Devices, Inc. All rights reserved.
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Analog Devices Semiconductor Electronic Components Datasheet

AD7992 Datasheet

12-Bit ADC

No Preview Available !

IMPORTANT LINKS for the AD7992*
Last content update 11/12/2013 12:39 pm
SIMILAR PRODUCTS & PARAMETRIC SELECTION TABLES
Find Similar Products By Operating Parameters
Low Resolution - Simultaneous Sampling 12-Bit PulSAR ADCs
Low Resolution - Muxed 8/10/12/13-Bit PulSAR ADCs
DOCUMENTATION
AD7992: Errata Sheet
AN-931: Understanding PulSAR ADC Support Circuitry
AN-686: Implementing an I2C(R) Reset
CN0288: LVDT Signal Conditioning Circuit
MS-2210: Designing Power Supplies for High Speed ADC
8- to 18-Bit SAR ADCs ... From the Leader in High Performance Analog
DESIGN TOOLS, MODELS, DRIVERS & SOFTWARE
AD7998 IIO ADC Linux Driver (Wiki Site)
PRODUCT RECOMMENDATIONS & REFERENCE DESIGNS
CN-0288: LVDT Signal Conditioning Circuit
CN-0301: Universal LVDT Signal Conditioning Circuit
SUGGESTED COMPANION PRODUCTS
Recommended Input Buffer Amplifiers for the AD7992
For low distortion, low noise, dual supplies, we recommend
the AD8599.
For precision, low noise, single supply, we recommend the
AD8605 family of operational amplifiers.
For single supply, high speed, low power, we suggest the
AD8031 or the dual AD8032.
For precision, high speed, low cost, we recommend the quad
AD8604.
Recommended External References - 2.5V for the AD7992
For applications requiring best accuracy, low noise, low drift,
we recommend the ADR421 or AD780.
For low noise, high output current applications, we
recommend the ADR431.
For wide supply applications, we recommend the ADR03 or
AD780.
For cost sensitive applications, we suggest the AD1582,
ADR381 or ADR391.
For the reference buffer amplifier, we recommend the AD8605.
For applications requiring 2.048V to 4.096V, we recommend
the REF191 reference family.
Recommended Digital Isolators for the AD7992
For dual I2C isolators, we recommend the ADuM1250,
ADuM1251, ADuM2250 or the ADuM2251.
EVALUATION KITS & SYMBOLS & FOOTPRINTS
View the Evaluation Boards and Kits page for documentation and
purchasing
Symbols and Footprints
DESIGN SUPPORT
Submit your support request here:
Linear and Data Converters
Embedded Processing and DSP
Telephone our Customer Interaction Centers toll free:
Americas:
1-800-262-5643
Europe:
00800-266-822-82
China:
4006-100-006
India:
1800-419-0108
Russia:
8-800-555-45-90
Quality and Reliability
Lead(Pb)-Free Data
DESIGN COLLABORATION COMMUNITY
Collaborate Online with the ADI support team and other designers
about select ADI products.
Follow us on Twitter: www.twitter.com/ADI_News
Like us on Facebook: www.facebook.com/AnalogDevicesInc
SAMPLE & BUY
AD7992
View Price & Packaging
Request Evaluation Board
Request Samples Check Inventory & Purchase
Find Local Distributors
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* This page was dynamically generated by Analog Devices, Inc. and inserted into this data sheet.
Note: Dynamic changes to the content on this page (labeled 'Important Links') does not
constitute a change to the revision number of the product data sheet.
This content may be frequently modified.
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Part Number AD7992
Description 12-Bit ADC
Maker Analog Devices
Total Page 29 Pages
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