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Analog Devices Semiconductor Electronic Components Datasheet

AD7294-2 Datasheet

12-Bit Monitor and Control System

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Data Sheet
12-Bit Monitor and Control System with Multichannel
ADC, DACs, Temperature Sensor, and Current Sense
AD7294-2
FEATURES
12-bit SAR ADC with 3 μs conversion time
4 uncommitted analog inputs
Differential/single-ended
VREF, 2 × VREF input ranges
2 high-side current sense inputs
5 V to 59.4 V operating range
0.75% maximum gain error
±200 mV input range
2 external diode temperature sensor inputs
−55°C to +150°C measurement range
±2°C accuracy
Series resistance cancellation
1 internal temperature sensor: ±2°C accuracy
Built-in monitoring features
Minimum/maximum recorder for each channel
Programmable alert thresholds
Programmable hysteresis
Four 12-bit, monotonic, 15 V DACs
5 V span, 0 V to 10 V offset
8 μs settling time
10 mA sink and source capability
Power-on reset (POR) to 0 V
Internal 2.5 V reference
2-wire, fast mode I2C interface
Temperature range: −40°C to +105°C
Package type: 64-lead TQFP
Pin compatible with the AD7294
APPLICATIONS
Cellular base stations
GSM, EDGE, UMTS, CDMA, TD-SCDMA, W-CDMA, WiMAX
Point-to-multipoint and other RF transmission systems
12 V, 24 V, 48 V automotive applications
Industrial controls
GENERAL DESCRIPTION
The AD7294-2 contains all the functions that are required for
general-purpose monitoring and control of current, voltage,
and temperature, integrated into a single-chip solution. The part
includes low voltage (±200 mV) analog input sense amplifiers
for current monitoring across shunt resistors, temperature sense
inputs, and four uncommitted analog input channels multiplexed
into a SAR analog-to-digital converter (ADC) with a 3 μs
conversion time. A high accuracy internal reference is provided
to drive both the digital-to-analog converters (DACs) and the
ADC. Four 12-bit DACs provide the outputs for voltage control.
The AD7294-2 also includes limit registers for alarm functions.
The part is designed for high voltage compliance: 59.4 V on the
current sense inputs and up to a 15 V DAC output voltage.
The AD7294-2 is a highly integrated solution that offers all the
functionality necessary for precise control of the power amplifier
in cellular base station applications. In these types of applications,
the DACs provide 12-bit resolution to control the bias currents
of the power transistors. Thermal diode-based temperature sensors
are incorporated to compensate for temperature effects. The ADC
monitors the high-side current and temperature. This functionality
is provided in a 64-lead TQFP, which operates over a temperature
range of −40°C to +105°C.
Rev. 0
Document Feedback
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responsibilityisassumedbyAnalogDevices for itsuse,nor foranyinfringementsofpatentsor 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.
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One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
©2013 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com


Analog Devices Semiconductor Electronic Components Datasheet

AD7294-2 Datasheet

12-Bit Monitor and Control System

No Preview Available !

AD7294-2* PRODUCT PAGE QUICK LINKS
Last Content Update: 02/23/2017
COMPARABLE PARTS
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EVALUATION KITS
AD7294-2 Evaluation Board
DOCUMENTATION
Data Sheet
AD7294-2: 12-Bit Monitor and Control System with
Multichannel ADC, DACs, Temperature Sensor, and
Current Sense Data Sheet
User Guides
UG-605: Evaluating the AD7294-2 12-Bit Monitor and
Control System
DESIGN RESOURCES
AD7294-2 Material Declaration
PCN-PDN Information
Quality And Reliability
Symbols and Footprints
DISCUSSIONS
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SAMPLE AND BUY
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TECHNICAL SUPPORT
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number.
DOCUMENT FEEDBACK
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Part Number AD7294-2
Description 12-Bit Monitor and Control System
Maker Analog Devices
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