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Analog Devices - 10-Bit Monitor and Control System

Numéro de référence AD7292
Description 10-Bit Monitor and Control System
Fabricant Analog Devices 
Logo Analog Devices 





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AD7292 fiche technique
Data Sheet
10-Bit Monitor and Control System with ADC,
DACs, Temperature Sensor, and GPIOs
AD7292
FEATURES
10-bit SAR ADC
8 multiplexed analog input channels
Single-ended mode of operation
Differential mode of operation
5 V analog input range
VREF, 2 × VREF, or 4 × VREF input ranges
Input measured with respect to AGND or VDD
4 monotonic, 10-bit, 5 V DACs
2 µs settling time
Power-on reset to 0 V
10 mA sink and source capability
Internal temperature sensor
±1°C accuracy
12 general-purpose digital I/O pins
Internal 1.25 V reference
Built-in monitoring features
Minimum and maximum value register for each channel
Programmable alert thresholds
Programmable hysteresis
SPI interface
Temperature range: −40°C to +125°C
Package type: 36-lead LFCSP
APPLICATIONS
Base station power amplifier (PA) monitoring and control
RF control loops
Optical communication system control
General-purpose system monitoring and control
GENERAL DESCRIPTION
The AD7292 contains all the functionality required for general-
purpose monitoring of analog signals and control of external
devices, integrated into a single-chip solution. The AD7292
features an 8-channel, 10-bit SAR ADC, four 10-bit DACs, a
±1°C accurate internal temperature sensor, and 12 GPIOs to
aid system monitoring and control.
The 10-bit, high speed, low power successive approximation
register (SAR) ADC is designed to monitor a variety of single-
ended input signals. Differential operation is also available by
configuring VIN0 and VIN1 to operate as a differential pair.
The AD7292 offers a register programmable ADC sequencer,
which enables the selection of a programmable sequence of
channels for conversion.
FUNCTIONAL BLOCK DIAGRAM
REFOUT
REFIN DVDD AVDD VDRIVE
TEMPERATURE
SENSOR
VIN0
VIN1
VIN2
VIN3
VIN4
VIN5
VIN6
VIN7
MUX T/H
BUF
1.25V
REF
÷4
BUF
10-BIT
SAR ADC
CONTROL
LOGIC
ALERT AND LIMIT
REGISTERS
AD7292
10-BIT
DAC
10-BIT
DAC
10-BIT
DAC
10-BIT
DAC
VOUT0
VOUT1
VOUT2
VOUT3
DIGITAL I/Os
SPI
INTERFACE
Figure 1.
Four 10-bit digital-to-analog converters (DACs) provide outputs
from 0 V to 5 V. An internal, high accuracy, 1.25 V reference
provides a separately buffered reference source for both the ADC
and the DACs.
A high accuracy band gap temperature sensor is monitored and
digitized by the 10-bit ADC to give a resolution of 0.03125°C.
The AD7292 also features built-in limit and alarm functions.
The AD7292 is a highly integrated solution offered in a 36-lead
LFCSP package with an operating temperature range of −40°C
to +125°C.
Rev. A
Document Feedback
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
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.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700 ©2012–2014 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com

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