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Analog Devices Semiconductor Electronic Components Datasheet

AD7293 Datasheet

12-Bit Power Amplifier Current Controller

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Data Sheet
12-Bit Power Amplifier Current Controller with
ADC, DACs, Temperature and Current Sensors
AD7293
FEATURES
4 closed-loop power amplifier (PA) drain current controllers
Built-in PA protection, sequencing, and alert features
Compatible with both depletion mode and enhancement mode
power amplifiers
Highly integrated
4 uncommitted 12-bit analog-to-digital converter (ADC) inputs
±0.5 LSB typical integral nonlinearity (INL)
Eight 12-bit voltage digital-to-analog converters (DACs)
1.3 μs maximum settling
4 high-side current sense amplifiers, ±0.1% gain error
2 external temperature sensor inputs, ±1.1°C accuracy
Internal temperature sensor, ±1.25°C accuracy
2.5 V on-chip reference
Flexible monitoring and control ranges
ADC input ranges: 0 V to 1.25 V, 0 V to 2.5 V, and 0 V to 5 V
Bipolar DAC ranges: 0 V to +5 V, −4 V to +1 V, and −5 V to 0 V
Bipolar DAC reset and clamping relative to VCLAMPx voltage
Unipolar DAC ranges: 0 V to 5 V, 2.5 V to 7.5 V, and 5 V to 10 V
Current sense gain: 6.25, 12.5, 25, 50, 100, and more
Adjustable closed-loop setpoint ramp time
High-side voltage current sensing
4 current sense inputs
4 V to AVSS + 60 V, ±200 mV input range
Small package and flexible interface
Serial port interface (SPI) with VDRIVE supporting 1.8 V, 3 V, and
5 V interfaces
56-lead LFCSP
Temperature range: −40°C to +125°C
APPLICATIONS
GaN and GaAs power amplifier monitoring and controls
Base station power amplifiers
General-purpose system monitoring and controls
GENERAL DESCRIPTION
The AD7293 is a PA drain current controller containing
functionality for general-purpose monitoring and control of
current, voltage, and temperature, integrated into a single chip
solution with an SPI-compatible interface.
The device features a 4-channel, 12-bit successive approximation
register (SAR) ADC, eight 12-bit DACs (four bipolar and four
unipolar with output ranges that can be configured to shut
down under external pin control), a ±1.25°C accurate internal
temperature sensor, and eight general-purpose input/output
(GPIO) pins.
Rev. A
Document Feedback
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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.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
SIMPLIFIED FUNCTIONAL BLOCK DIAGRAM
PRECISION
2.5V
REFERENCE
×
1
2
1.25V
2.5V
BIPOLAR
DAC
PMOS
CONTROL
AD7293
+Σ
PAVDD
PA_ON
MUX
12-BIT
SAR ADC
ALERT
AND LIMIT
REGISTERS
0V TO +5V
–4V TO +1V
–5V TO 0V
UNIPOLAR
D0+ DAC
0V TO 5V
2.5V TO 7.5V
D0– 5V TO 10V
D1+
D1–
RESET
SPI
LOGIC INTERFACE
CONTROL
LOGIC
DIGITAL
LDAC AND
INPUT/OUTPUT CLAMP CONTROL
Figure 1.
The device also includes limit registers for alert functions and four
high-side current sense amplifiers to measure current across
external shunt resistors. These amplifiers can be optionally set to
operate as part of four independent closed-loop drain current
controllers.
A high accuracy 2.5 V internal reference is provided to drive the
DACs and the ADC. The 12-bit ADC monitors and digitizes the
internal temperature sensor, and two inputs are included for the
external diode temperature sensors.
Note that throughout this data sheet, multifunction pins, such
as GPIO4/ALERT1, are referred to either by the entire pin name
or by a single function of the pin, for example, ALERT1, when
only that function is relevant.
PRODUCT HIGHLIGHTS
1. Four independent closed-loop drain current controllers.
2. Built-in monitoring, sequencing, and alert features.
3. Compatible with both depletion mode and enhancement
mode power amplifiers.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
©2016 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com


Analog Devices Semiconductor Electronic Components Datasheet

AD7293 Datasheet

12-Bit Power Amplifier Current Controller

No Preview Available !

AD7293* PRODUCT PAGE QUICK LINKS
Last Content Update: 02/23/2017
COMPARABLE PARTS
View a parametric search of comparable parts.
EVALUATION KITS
AD7293 Evaluation Board
DOCUMENTATION
Application Notes
AN-1361: AD7293 Closed-Loop for Power Amplifier Drain
Current Control
Data Sheet
AD7293: 12-Bit Power Amplifier Current Controller with
ADC, DACs, Temperature and Current Sensors Data Sheet
User Guides
UG-817: Evaluating the AD7293 12-Bit Power Amplifier
Current Controller with ADC, DACs, Temperature and
Current Sensors
DESIGN RESOURCES
AD7293 Material Declaration
PCN-PDN Information
Quality And Reliability
Symbols and Footprints
DISCUSSIONS
View all AD7293 EngineerZone Discussions.
SAMPLE AND BUY
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TECHNICAL SUPPORT
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number.
DOCUMENT FEEDBACK
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This page is dynamically generated by Analog Devices, Inc., and inserted into this data sheet. A dynamic change to the content on this page will not
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Part Number AD7293
Description 12-Bit Power Amplifier Current Controller
Maker Analog Devices
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AD7293 Datasheet PDF






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