10-Bit Monitor and Control System with ADC,
DACs, Temperature Sensor, and GPIOs
Data Sheet
AD7292
FEATURES
FUNCTIONAL BLOCK DIAGRAM
REF
REF DV
IN
AV
V
DD DRIVE
OUT
DD
10-bit SAR ADC
8 multiplexed analog input channels
Single-ended mode of operation
Differential mode of operation
5 V analog input range
TEMPERATURE
SENSOR
÷4
AD7292
1.25V
REF
BUF
BUF
VIN0
VIN1
VIN2
VIN3
VIN4
VIN5
VIN6
VIN7
10-BIT
DAC
V
REF, 2 × VREF, or 4 × VREF input ranges
VOUT0
VOUT1
VOUT2
VOUT3
Input measured with respect to AGND or VDD
4 monotonic, 10-bit, 5 V DACs
2 µs settling time
10-BIT
SAR ADC
CONTROL
LOGIC
10-BIT
DAC
MUX
T/H
Power-on reset to 0 V
10-BIT
DAC
10 mA sink and source capability
Internal temperature sensor
1°C accuracy
12 general-purpose digital I/O pins
Internal 1.25 V reference
10-BIT
DAC
ALERT AND LIMIT
REGISTERS
Built-in monitoring features
Minimum and maximum value register for each channel
Programmable alert thresholds
Programmable hysteresis
SPI
INTERFACE
DIGITAL I/Os
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
Figure 1.
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.
Four 10-bit digital-to-analog converters (DACs) provide outputs
from 0 V to 5 V. A n 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 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 is a highly integrated solution offered in a 36-lead
LFCSP package with an operating temperature range of −40°C
to +125°C.
The AD7292 offers a register programmable ADC sequencer,
which enables the selection of a programmable sequence of
channels for conversion.
Rev. A
Document Feedback
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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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