Datasheet AD7292 (Analog Devices)

10-Bit Monitor and Control System with ADC, DACs, Temperature Sensor, and GPIOs Data Sheet AD7292 FEATURES FUNCTIONAL BLOCK DIAGRAM 10-bit SAR ADC REFOUT REF DV IN DD AVDD VDRIVE 8 multiplexed analog input channels Single-ended mode of operation TEMPERATURE ÷4 SENSOR AD7292 Differential mode of operation 1.25V BUF BUF 5 V analog input range REF VIN0 VREF, 2 × VREF, or 4 × VREF input ranges 10-BIT VIN1 VOUT0 DAC Input measured with respect to AGND or VDD VIN2 4 monotonic, 10-bit, 5 V DACs VIN3 10-BIT CONTROL 10-BIT VOUT1 2 µs settling time MUX T/H SAR ADC LOGIC DAC VIN4 Power-on reset to 0 V VIN5 10 mA sink and source capability 10-BIT VOUT2 VIN6 DAC Internal temperature sensor VIN7 ±1°C accuracy 10-BIT VOUT3 DAC 12 general-purpose digital I/O pins ALERT AND LIMIT REGISTERS Internal 1.25 V reference Built-in monitoring features SPI DIGITAL I/Os Minimum and maximum value register for each channel INTERFACE Programmable alert thresholds Programmable hysteresis SPI interface 0 C 1 Y 0 1 N K Temperature range: −40°C to +125°C T0 T1 E A E S UT ND ND R R CS IO5 U IO7 IO8 IO9 DI G IO1 IO1 G CL S A D DO Package type: 36-lead LFCSP LE LE ABL /LD ABL GP /B GP GP GP GP GP /A /A S S IO3 IO6 IO0 IO1 APPLICATIONS GP GP GP GP DAC DI DAC DI 2/ 4/ Base station power amplifier (PA) monitoring and control IO IO
001
P P G G RF control loops
10660- Figure 1.
Optical communication system control General-purpose system monitoring and control GENERAL DESCRIPTION
The AD7292 contains all the functionality required for general- Four 10-bit digital-to-analog converters (DACs) provide outputs purpose monitoring of analog signals and control of external from 0 V to 5 V. An internal, high accuracy, 1.25 V reference devices, integrated into a single-chip solution. The AD7292 provides a separately buffered reference source for both the ADC features an 8-channel, 10-bit SAR ADC, four 10-bit DACs, a and the DACs. ±1°C accurate internal temperature sensor, and 12 GPIOs to A high accuracy band gap temperature sensor is monitored and aid system monitoring and control. digitized by the 10-bit ADC to give a resolution of 0.03125°C. The 10-bit, high speed, low power successive approximation The AD7292 also features built-in limit and alarm functions. register (SAR) ADC is designed to monitor a variety of single- The AD7292 is a highly integrated solution offered in a 36-lead ended input signals. Differential operation is also available by LFCSP package with an operating temperature range of −40°C configuring VIN0 and VIN1 to operate as a differential pair. 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 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 One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Tel: 781.329.4700 ©2012–2014 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. Technical Support www.analog.com
Document Outline Features Applications Functional Block Diagram General Description Table of Contents Revision History Specifications ADC Specifications DAC Specifications General Specifications Temperature Sensor Specifications Timing Specifications Timing Diagram Absolute Maximum Ratings Thermal Resistance ESD Caution Pin Configuration and Function Descriptions Typical Performance Characteristics Theory of Operation Analog Inputs Single-Ended Mode Differential Mode ADC Transfer Functions Temperature Sensor DAC Operation Digital I/O Pins GPIO0/ALERT0 and GPIO1/ALERT1 Pins GPIO2/DAC DISABLE0 and GPIO4/DAC DISABLE1 Pins GPIO3/LDAC Pin GPIO6/BUSY Pin Serial Port Interface (SPI) Interface Protocol Register Structure Register Descriptions Vendor ID Register (Address 0x00) ADC Data Register (Address 0x01) ADC Sequence Register (Address 0x03) Configuration Register Bank (Address 0x05) Digital Output Driver Subregister (Address 0x01) Digital I/O Function Subregister (Address 0x02) General Subregister (Address 0x08) VIN RANGE0 and VIN RANGE1 Subregisters (Address 0x10 and Address 0x11) ADC Sampling Mode Subregister (Address 0x12) VIN Filter Subregister (Address 0x13) Conversion Delay Control Subregister (Address 0x14) VIN ALERT0 Routing and VIN ALERT1 Routing Subregisters (Address 0x15 and Address 0x16) Temperature Sensor Subregister (Address 0x20) Temperature Sensor Alert Routing Subregister (Address 0x21) GPIO2/DAC DISABLE0 and GPIO4/DAC DISABLE1 Subregisters (Address 0x30 and Address 0x31) Alert Limits Register Bank (Address 0x06) Alert High Limit and Alert Low Limit Subregisters Hysteresis Subregisters Alert Flags Register Bank (Address 0x07) ADC Alert Flags and TSENSE Alert Flags Subregisters (Address 0x00 and Address 0x02) Minimum and Maximum Register Bank (Address 0x08) Offset Register Bank (Address 0x09) DAC Buffer Enable Register (Address 0x0A) GPIO Register (Address 0x0B) Conversion Command Register (Address 0x0E) ADC Conversion Result Registers, VIN0 to VIN7 (Address 0x10 to Address 0x17) TSENSE Conversion Result Register (Address 0x20) DAC Channel Registers (Address 0x30 to Address 0x33) ADC Conversion Control ADC Conversion Command ADC Sequencer DAC Output Control LDAC Operation Simultaneous Update of All DAC Outputs Alerts and Limits Alert Limit Monitoring Features Hysteresis Hardware Alert Pins Alert Flag Bits in the Conversion Result Registers Alert Flags Register Bank Minimum and Maximum Conversion Results Outline Dimensions Ordering Guide